Merging upstream version 1.46.3.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 0 insertions, 2431 deletions

diff --git a/libnetdata/log/log.c b/libnetdata/log/log.c
deleted file mode 100644
index c805716c..00000000
--- a/libnetdata/log/log.c
+++ /dev/null
@@ -1,2431 +0,0 @@
-// SPDX-License-Identifier: GPL-3.0-or-later
-
-#define SD_JOURNAL_SUPPRESS_LOCATION
-
-#include "../libnetdata.h"
-#include <daemon/main.h>
-
-#ifdef __FreeBSD__
-#include <sys/endian.h>
-#endif
-
-#ifdef __APPLE__
-#include <machine/endian.h>
-#endif
-
-#ifdef HAVE_BACKTRACE
-#include <execinfo.h>
-#endif
-
-#ifdef HAVE_SYSTEMD
-#include <systemd/sd-journal.h>
-#endif
-
-#include <syslog.h>
-
-const char *program_name = "";
-
-uint64_t debug_flags = 0;
-
-#ifdef ENABLE_ACLK
-int aclklog_enabled = 0;
-#endif
-
-// ----------------------------------------------------------------------------
-
-struct nd_log_source;
-static bool nd_log_limit_reached(struct nd_log_source *source);
-
-// ----------------------------------------------------------------------------
-// logging method
-
-typedef enum  __attribute__((__packed__)) {
-    NDLM_DISABLED = 0,
-    NDLM_DEVNULL,
-    NDLM_DEFAULT,
-    NDLM_JOURNAL,
-    NDLM_SYSLOG,
-    NDLM_STDOUT,
-    NDLM_STDERR,
-    NDLM_FILE,
-} ND_LOG_METHOD;
-
-static struct {
-    ND_LOG_METHOD method;
-    const char *name;
-} nd_log_methods[] = {
-        { .method = NDLM_DISABLED, .name = "none" },
-        { .method = NDLM_DEVNULL, .name = "/dev/null" },
-        { .method = NDLM_DEFAULT, .name = "default" },
-        { .method = NDLM_JOURNAL, .name = "journal" },
-        { .method = NDLM_SYSLOG, .name = "syslog" },
-        { .method = NDLM_STDOUT, .name = "stdout" },
-        { .method = NDLM_STDERR, .name = "stderr" },
-        { .method = NDLM_FILE, .name = "file" },
-};
-
-static ND_LOG_METHOD nd_log_method2id(const char *method) {
-    if(!method || !*method)
-        return NDLM_DEFAULT;
-
-    size_t entries = sizeof(nd_log_methods) / sizeof(nd_log_methods[0]);
-    for(size_t i = 0; i < entries ;i++) {
-        if(strcmp(nd_log_methods[i].name, method) == 0)
-            return nd_log_methods[i].method;
-    }
-
-    return NDLM_FILE;
-}
-
-static const char *nd_log_id2method(ND_LOG_METHOD method) {
-    size_t entries = sizeof(nd_log_methods) / sizeof(nd_log_methods[0]);
-    for(size_t i = 0; i < entries ;i++) {
-        if(method == nd_log_methods[i].method)
-            return nd_log_methods[i].name;
-    }
-
-    return "unknown";
-}
-
-#define IS_VALID_LOG_METHOD_FOR_EXTERNAL_PLUGINS(ndlo) ((ndlo) == NDLM_JOURNAL || (ndlo) == NDLM_SYSLOG || (ndlo) == NDLM_STDERR)
-
-const char *nd_log_method_for_external_plugins(const char *s) {
-    if(s && *s) {
-        ND_LOG_METHOD method = nd_log_method2id(s);
-        if(IS_VALID_LOG_METHOD_FOR_EXTERNAL_PLUGINS(method))
-            return nd_log_id2method(method);
-    }
-
-    return nd_log_id2method(NDLM_STDERR);
-}
-
-// ----------------------------------------------------------------------------
-// workaround strerror_r()
-
-#if defined(STRERROR_R_CHAR_P)
-// GLIBC version of strerror_r
-static const char *strerror_result(const char *a, const char *b) { (void)b; return a; }
-#elif defined(HAVE_STRERROR_R)
-// POSIX version of strerror_r
-static const char *strerror_result(int a, const char *b) { (void)a; return b; }
-#elif defined(HAVE_C__GENERIC)
-
-// what a trick!
-// http://stackoverflow.com/questions/479207/function-overloading-in-c
-static const char *strerror_result_int(int a, const char *b) { (void)a; return b; }
-static const char *strerror_result_string(const char *a, const char *b) { (void)b; return a; }
-
-#define strerror_result(a, b) _Generic((a), \
-    int: strerror_result_int, \
-    char *: strerror_result_string \
-    )(a, b)
-
-#else
-#error "cannot detect the format of function strerror_r()"
-#endif
-
-static const char *errno2str(int errnum, char *buf, size_t size) {
-    return strerror_result(strerror_r(errnum, buf, size), buf);
-}
-
-// ----------------------------------------------------------------------------
-// facilities
-//
-// sys/syslog.h (Linux)
-// sys/sys/syslog.h (FreeBSD)
-// bsd/sys/syslog.h (darwin-xnu)
-
-static struct {
-    int facility;
-    const char *name;
-} nd_log_facilities[] = {
-        { LOG_AUTH, "auth" },
-        { LOG_AUTHPRIV, "authpriv" },
-        { LOG_CRON, "cron" },
-        { LOG_DAEMON, "daemon" },
-        { LOG_FTP, "ftp" },
-        { LOG_KERN, "kern" },
-        { LOG_LPR, "lpr" },
-        { LOG_MAIL, "mail" },
-        { LOG_NEWS, "news" },
-        { LOG_SYSLOG, "syslog" },
-        { LOG_USER, "user" },
-        { LOG_UUCP, "uucp" },
-        { LOG_LOCAL0, "local0" },
-        { LOG_LOCAL1, "local1" },
-        { LOG_LOCAL2, "local2" },
-        { LOG_LOCAL3, "local3" },
-        { LOG_LOCAL4, "local4" },
-        { LOG_LOCAL5, "local5" },
-        { LOG_LOCAL6, "local6" },
-        { LOG_LOCAL7, "local7" },
-
-#ifdef __FreeBSD__
-        { LOG_CONSOLE, "console" },
-        { LOG_NTP, "ntp" },
-
-        // FreeBSD does not consider 'security' as deprecated.
-        { LOG_SECURITY, "security" },
-#else
-        // For all other O/S 'security' is mapped to 'auth'.
-        { LOG_AUTH, "security" },
-#endif
-
-#ifdef __APPLE__
-        { LOG_INSTALL, "install" },
-        { LOG_NETINFO, "netinfo" },
-        { LOG_RAS,     "ras" },
-        { LOG_REMOTEAUTH, "remoteauth" },
-        { LOG_LAUNCHD, "launchd" },
-
-#endif
-};
-
-static int nd_log_facility2id(const char *facility) {
-    size_t entries = sizeof(nd_log_facilities) / sizeof(nd_log_facilities[0]);
-    for(size_t i = 0; i < entries ;i++) {
-        if(strcmp(nd_log_facilities[i].name, facility) == 0)
-            return nd_log_facilities[i].facility;
-    }
-
-    return LOG_DAEMON;
-}
-
-static const char *nd_log_id2facility(int facility) {
-    size_t entries = sizeof(nd_log_facilities) / sizeof(nd_log_facilities[0]);
-    for(size_t i = 0; i < entries ;i++) {
-        if(nd_log_facilities[i].facility == facility)
-            return nd_log_facilities[i].name;
-    }
-
-    return "daemon";
-}
-
-// ----------------------------------------------------------------------------
-// priorities
-
-static struct {
-    ND_LOG_FIELD_PRIORITY priority;
-    const char *name;
-} nd_log_priorities[] = {
-        { .priority = NDLP_EMERG, .name = "emergency" },
-        { .priority = NDLP_EMERG, .name = "emerg" },
-        { .priority = NDLP_ALERT, .name = "alert" },
-        { .priority = NDLP_CRIT, .name = "critical" },
-        { .priority = NDLP_CRIT, .name = "crit" },
-        { .priority = NDLP_ERR, .name = "error" },
-        { .priority = NDLP_ERR, .name = "err" },
-        { .priority = NDLP_WARNING, .name = "warning" },
-        { .priority = NDLP_WARNING, .name = "warn" },
-        { .priority = NDLP_NOTICE, .name = "notice" },
-        { .priority = NDLP_INFO, .name = NDLP_INFO_STR },
-        { .priority = NDLP_DEBUG, .name = "debug" },
-};
-
-int nd_log_priority2id(const char *priority) {
-    size_t entries = sizeof(nd_log_priorities) / sizeof(nd_log_priorities[0]);
-    for(size_t i = 0; i < entries ;i++) {
-        if(strcmp(nd_log_priorities[i].name, priority) == 0)
-            return nd_log_priorities[i].priority;
-    }
-
-    return NDLP_INFO;
-}
-
-const char *nd_log_id2priority(ND_LOG_FIELD_PRIORITY priority) {
-    size_t entries = sizeof(nd_log_priorities) / sizeof(nd_log_priorities[0]);
-    for(size_t i = 0; i < entries ;i++) {
-        if(priority == nd_log_priorities[i].priority)
-            return nd_log_priorities[i].name;
-    }
-
-    return NDLP_INFO_STR;
-}
-
-// ----------------------------------------------------------------------------
-// log sources
-
-const char *nd_log_sources[] = {
-        [NDLS_UNSET] = "UNSET",
-        [NDLS_ACCESS] = "access",
-        [NDLS_ACLK] = "aclk",
-        [NDLS_COLLECTORS] = "collector",
-        [NDLS_DAEMON] = "daemon",
-        [NDLS_HEALTH] = "health",
-        [NDLS_DEBUG] = "debug",
-};
-
-size_t nd_log_source2id(const char *source, ND_LOG_SOURCES def) {
-    size_t entries = sizeof(nd_log_sources) / sizeof(nd_log_sources[0]);
-    for(size_t i = 0; i < entries ;i++) {
-        if(strcmp(nd_log_sources[i], source) == 0)
-            return i;
-    }
-
-    return def;
-}
-
-
-static const char *nd_log_id2source(ND_LOG_SOURCES source) {
-    size_t entries = sizeof(nd_log_sources) / sizeof(nd_log_sources[0]);
-    if(source < entries)
-        return nd_log_sources[source];
-
-    return nd_log_sources[NDLS_COLLECTORS];
-}
-
-// ----------------------------------------------------------------------------
-// log output formats
-
-typedef enum __attribute__((__packed__)) {
-    NDLF_JOURNAL,
-    NDLF_LOGFMT,
-    NDLF_JSON,
-} ND_LOG_FORMAT;
-
-static struct {
-    ND_LOG_FORMAT format;
-    const char *name;
-} nd_log_formats[] = {
-        { .format = NDLF_JOURNAL, .name = "journal" },
-        { .format = NDLF_LOGFMT, .name = "logfmt" },
-        { .format = NDLF_JSON, .name = "json" },
-};
-
-static ND_LOG_FORMAT nd_log_format2id(const char *format) {
-    if(!format || !*format)
-        return NDLF_LOGFMT;
-
-    size_t entries = sizeof(nd_log_formats) / sizeof(nd_log_formats[0]);
-    for(size_t i = 0; i < entries ;i++) {
-        if(strcmp(nd_log_formats[i].name, format) == 0)
-            return nd_log_formats[i].format;
-    }
-
-    return NDLF_LOGFMT;
-}
-
-static const char *nd_log_id2format(ND_LOG_FORMAT format) {
-    size_t entries = sizeof(nd_log_formats) / sizeof(nd_log_formats[0]);
-    for(size_t i = 0; i < entries ;i++) {
-        if(format == nd_log_formats[i].format)
-            return nd_log_formats[i].name;
-    }
-
-    return "logfmt";
-}
-
-// ----------------------------------------------------------------------------
-// format dates
-
-void log_date(char *buffer, size_t len, time_t now) {
-    if(unlikely(!buffer || !len))
-        return;
-
-    time_t t = now;
-    struct tm *tmp, tmbuf;
-
-    tmp = localtime_r(&t, &tmbuf);
-
-    if (unlikely(!tmp)) {
-        buffer[0] = '\0';
-        return;
-    }
-
-    if (unlikely(strftime(buffer, len, "%Y-%m-%d %H:%M:%S", tmp) == 0))
-        buffer[0] = '\0';
-
-    buffer[len - 1] = '\0';
-}
-
-// ----------------------------------------------------------------------------
-
-struct nd_log_limit {
-    usec_t started_monotonic_ut;
-    uint32_t counter;
-    uint32_t prevented;
-
-    uint32_t throttle_period;
-    uint32_t logs_per_period;
-    uint32_t logs_per_period_backup;
-};
-
-#define ND_LOG_LIMITS_DEFAULT (struct nd_log_limit){ .logs_per_period = ND_LOG_DEFAULT_THROTTLE_LOGS, .logs_per_period_backup = ND_LOG_DEFAULT_THROTTLE_LOGS, .throttle_period = ND_LOG_DEFAULT_THROTTLE_PERIOD, }
-#define ND_LOG_LIMITS_UNLIMITED (struct nd_log_limit){  .logs_per_period = 0, .logs_per_period_backup = 0, .throttle_period = 0, }
-
-struct nd_log_source {
-    SPINLOCK spinlock;
-    ND_LOG_METHOD method;
-    ND_LOG_FORMAT format;
-    const char *filename;
-    int fd;
-    FILE *fp;
-
-    ND_LOG_FIELD_PRIORITY min_priority;
-    const char *pending_msg;
-    struct nd_log_limit limits;
-};
-
-static __thread ND_LOG_SOURCES overwrite_thread_source = 0;
-
-void nd_log_set_thread_source(ND_LOG_SOURCES source) {
-    overwrite_thread_source = source;
-}
-
-static struct {
-    uuid_t invocation_id;
-
-    ND_LOG_SOURCES overwrite_process_source;
-
-    struct nd_log_source sources[_NDLS_MAX];
-
-    struct {
-        bool initialized;
-    } journal;
-
-    struct {
-        bool initialized;
-        int fd;
-        char filename[FILENAME_MAX + 1];
-    } journal_direct;
-
-    struct {
-        bool initialized;
-        int facility;
-    } syslog;
-
-    struct {
-        SPINLOCK spinlock;
-        bool initialized;
-    } std_output;
-
-    struct {
-        SPINLOCK spinlock;
-        bool initialized;
-    } std_error;
-
-} nd_log = {
-        .overwrite_process_source = 0,
-        .journal = {
-                .initialized = false,
-        },
-        .journal_direct = {
-                .initialized = false,
-                .fd = -1,
-        },
-        .syslog = {
-                .initialized = false,
-                .facility = LOG_DAEMON,
-        },
-        .std_output = {
-                .spinlock = NETDATA_SPINLOCK_INITIALIZER,
-                .initialized = false,
-        },
-        .std_error = {
-                .spinlock = NETDATA_SPINLOCK_INITIALIZER,
-                .initialized = false,
-        },
-        .sources = {
-                [NDLS_UNSET] = {
-                        .spinlock = NETDATA_SPINLOCK_INITIALIZER,
-                        .method = NDLM_DISABLED,
-                        .format = NDLF_JOURNAL,
-                        .filename = NULL,
-                        .fd = -1,
-                        .fp = NULL,
-                        .min_priority = NDLP_EMERG,
-                        .limits = ND_LOG_LIMITS_UNLIMITED,
-                },
-                [NDLS_ACCESS] = {
-                        .spinlock = NETDATA_SPINLOCK_INITIALIZER,
-                        .method = NDLM_DEFAULT,
-                        .format = NDLF_LOGFMT,
-                        .filename = LOG_DIR "/access.log",
-                        .fd = -1,
-                        .fp = NULL,
-                        .min_priority = NDLP_DEBUG,
-                        .limits = ND_LOG_LIMITS_UNLIMITED,
-                },
-                [NDLS_ACLK] = {
-                        .spinlock = NETDATA_SPINLOCK_INITIALIZER,
-                        .method = NDLM_FILE,
-                        .format = NDLF_LOGFMT,
-                        .filename = LOG_DIR "/aclk.log",
-                        .fd = -1,
-                        .fp = NULL,
-                        .min_priority = NDLP_DEBUG,
-                        .limits = ND_LOG_LIMITS_UNLIMITED,
-                },
-                [NDLS_COLLECTORS] = {
-                        .spinlock = NETDATA_SPINLOCK_INITIALIZER,
-                        .method = NDLM_DEFAULT,
-                        .format = NDLF_LOGFMT,
-                        .filename = LOG_DIR "/collectors.log",
-                        .fd = STDERR_FILENO,
-                        .fp = NULL,
-                        .min_priority = NDLP_INFO,
-                        .limits = ND_LOG_LIMITS_DEFAULT,
-                },
-                [NDLS_DEBUG] = {
-                        .spinlock = NETDATA_SPINLOCK_INITIALIZER,
-                        .method = NDLM_DISABLED,
-                        .format = NDLF_LOGFMT,
-                        .filename = LOG_DIR "/debug.log",
-                        .fd = STDOUT_FILENO,
-                        .fp = NULL,
-                        .min_priority = NDLP_DEBUG,
-                        .limits = ND_LOG_LIMITS_UNLIMITED,
-                },
-                [NDLS_DAEMON] = {
-                        .spinlock = NETDATA_SPINLOCK_INITIALIZER,
-                        .method = NDLM_DEFAULT,
-                        .filename = LOG_DIR "/daemon.log",
-                        .format = NDLF_LOGFMT,
-                        .fd = -1,
-                        .fp = NULL,
-                        .min_priority = NDLP_INFO,
-                        .limits = ND_LOG_LIMITS_DEFAULT,
-                },
-                [NDLS_HEALTH] = {
-                        .spinlock = NETDATA_SPINLOCK_INITIALIZER,
-                        .method = NDLM_DEFAULT,
-                        .format = NDLF_LOGFMT,
-                        .filename = LOG_DIR "/health.log",
-                        .fd = -1,
-                        .fp = NULL,
-                        .min_priority = NDLP_DEBUG,
-                        .limits = ND_LOG_LIMITS_UNLIMITED,
-                },
-        },
-};
-
-__attribute__((constructor)) void initialize_invocation_id(void) {
-    // check for a NETDATA_INVOCATION_ID
-    if(uuid_parse_flexi(getenv("NETDATA_INVOCATION_ID"), nd_log.invocation_id) != 0) {
-        // not found, check for systemd set INVOCATION_ID
-        if(uuid_parse_flexi(getenv("INVOCATION_ID"), nd_log.invocation_id) != 0) {
-            // not found, generate a new one
-            uuid_generate_random(nd_log.invocation_id);
-        }
-    }
-
-    char uuid[UUID_COMPACT_STR_LEN];
-    uuid_unparse_lower_compact(nd_log.invocation_id, uuid);
-    setenv("NETDATA_INVOCATION_ID", uuid, 1);
-}
-
-int nd_log_health_fd(void) {
-    if(nd_log.sources[NDLS_HEALTH].method == NDLM_FILE && nd_log.sources[NDLS_HEALTH].fd != -1)
-        return nd_log.sources[NDLS_HEALTH].fd;
-
-    return STDERR_FILENO;
-}
-
-void nd_log_set_user_settings(ND_LOG_SOURCES source, const char *setting) {
-    char buf[FILENAME_MAX + 100];
-    if(setting && *setting)
-        strncpyz(buf, setting, sizeof(buf) - 1);
-    else
-        buf[0] = '\0';
-
-    struct nd_log_source *ls = &nd_log.sources[source];
-    char *output = strrchr(buf, '@');
-
-    if(!output)
-        // all of it is the output
-        output = buf;
-    else {
-        // we found an '@', the next char is the output
-        *output = '\0';
-        output++;
-
-        // parse the other params
-        char *remaining = buf;
-        while(remaining) {
-            char *value = strsep_skip_consecutive_separators(&remaining, ",");
-            if (!value || !*value) continue;
-
-            char *name = strsep_skip_consecutive_separators(&value, "=");
-            if (!name || !*name) continue;
-
-            if(strcmp(name, "logfmt") == 0)
-                ls->format = NDLF_LOGFMT;
-            else if(strcmp(name, "json") == 0)
-                ls->format = NDLF_JSON;
-            else if(strcmp(name, "journal") == 0)
-                ls->format = NDLF_JOURNAL;
-            else if(strcmp(name, "level") == 0 && value && *value)
-                ls->min_priority = nd_log_priority2id(value);
-            else if(strcmp(name, "protection") == 0 && value && *value) {
-                if(strcmp(value, "off") == 0 || strcmp(value, "none") == 0) {
-                    ls->limits = ND_LOG_LIMITS_UNLIMITED;
-                    ls->limits.counter = 0;
-                    ls->limits.prevented = 0;
-                }
-                else {
-                    ls->limits = ND_LOG_LIMITS_DEFAULT;
-
-                    char *slash = strchr(value, '/');
-                    if(slash) {
-                        *slash = '\0';
-                        slash++;
-                        ls->limits.logs_per_period = ls->limits.logs_per_period_backup = str2u(value);
-                        ls->limits.throttle_period = str2u(slash);
-                    }
-                    else {
-                        ls->limits.logs_per_period = ls->limits.logs_per_period_backup = str2u(value);
-                        ls->limits.throttle_period = ND_LOG_DEFAULT_THROTTLE_PERIOD;
-                    }
-                }
-            }
-            else
-                nd_log(NDLS_DAEMON, NDLP_ERR, "Error while parsing configuration of log source '%s'. "
-                                              "In config '%s', '%s' is not understood.",
-                       nd_log_id2source(source), setting, name);
-        }
-    }
-
-    if(!output || !*output || strcmp(output, "none") == 0 || strcmp(output, "off") == 0) {
-        ls->method = NDLM_DISABLED;
-        ls->filename = "/dev/null";
-    }
-    else if(strcmp(output, "journal") == 0) {
-        ls->method = NDLM_JOURNAL;
-        ls->filename = NULL;
-    }
-    else if(strcmp(output, "syslog") == 0) {
-        ls->method = NDLM_SYSLOG;
-        ls->filename = NULL;
-    }
-    else if(strcmp(output, "/dev/null") == 0) {
-        ls->method = NDLM_DEVNULL;
-        ls->filename = "/dev/null";
-    }
-    else if(strcmp(output, "system") == 0) {
-        if(ls->fd == STDERR_FILENO) {
-            ls->method = NDLM_STDERR;
-            ls->filename = NULL;
-            ls->fd = STDERR_FILENO;
-        }
-        else {
-            ls->method = NDLM_STDOUT;
-            ls->filename = NULL;
-            ls->fd = STDOUT_FILENO;
-        }
-    }
-    else if(strcmp(output, "stderr") == 0) {
-        ls->method = NDLM_STDERR;
-        ls->filename = NULL;
-        ls->fd = STDERR_FILENO;
-    }
-    else if(strcmp(output, "stdout") == 0) {
-        ls->method = NDLM_STDOUT;
-        ls->filename = NULL;
-        ls->fd = STDOUT_FILENO;
-    }
-    else {
-        ls->method = NDLM_FILE;
-        ls->filename = strdupz(output);
-    }
-
-#if defined(NETDATA_INTERNAL_CHECKS) || defined(NETDATA_DEV_MODE)
-    ls->min_priority = NDLP_DEBUG;
-#endif
-
-    if(source == NDLS_COLLECTORS) {
-        // set the method for the collector processes we will spawn
-
-        ND_LOG_METHOD method;
-        ND_LOG_FORMAT format = ls->format;
-        ND_LOG_FIELD_PRIORITY priority = ls->min_priority;
-
-        if(ls->method == NDLM_SYSLOG || ls->method == NDLM_JOURNAL)
-            method = ls->method;
-        else
-            method = NDLM_STDERR;
-
-        setenv("NETDATA_LOG_METHOD", nd_log_id2method(method), 1);
-        setenv("NETDATA_LOG_FORMAT", nd_log_id2format(format), 1);
-        setenv("NETDATA_LOG_LEVEL", nd_log_id2priority(priority), 1);
-    }
-}
-
-void nd_log_set_priority_level(const char *setting) {
-    if(!setting || !*setting)
-        setting = "info";
-
-    ND_LOG_FIELD_PRIORITY priority = nd_log_priority2id(setting);
-
-#if defined(NETDATA_INTERNAL_CHECKS) || defined(NETDATA_DEV_MODE)
-    priority = NDLP_DEBUG;
-#endif
-
-    for (size_t i = 0; i < _NDLS_MAX; i++) {
-        if (i != NDLS_DEBUG)
-            nd_log.sources[i].min_priority = priority;
-    }
-
-    // the right one
-    setenv("NETDATA_LOG_LEVEL", nd_log_id2priority(priority), 1);
-}
-
-void nd_log_set_facility(const char *facility) {
-    if(!facility || !*facility)
-        facility = "daemon";
-
-    nd_log.syslog.facility = nd_log_facility2id(facility);
-    setenv("NETDATA_SYSLOG_FACILITY", nd_log_id2facility(nd_log.syslog.facility), 1);
-}
-
-void nd_log_set_flood_protection(size_t logs, time_t period) {
-    nd_log.sources[NDLS_DAEMON].limits.logs_per_period =
-            nd_log.sources[NDLS_DAEMON].limits.logs_per_period_backup;
-            nd_log.sources[NDLS_COLLECTORS].limits.logs_per_period =
-            nd_log.sources[NDLS_COLLECTORS].limits.logs_per_period_backup = logs;
-
-    nd_log.sources[NDLS_DAEMON].limits.throttle_period =
-            nd_log.sources[NDLS_COLLECTORS].limits.throttle_period = period;
-
-    char buf[100];
-    snprintfz(buf, sizeof(buf), "%" PRIu64, (uint64_t )period);
-    setenv("NETDATA_ERRORS_THROTTLE_PERIOD", buf, 1);
-    snprintfz(buf, sizeof(buf), "%" PRIu64, (uint64_t )logs);
-    setenv("NETDATA_ERRORS_PER_PERIOD", buf, 1);
-}
-
-static bool nd_log_journal_systemd_init(void) {
-#ifdef HAVE_SYSTEMD
-    nd_log.journal.initialized = true;
-#else
-    nd_log.journal.initialized = false;
-#endif
-
-    return nd_log.journal.initialized;
-}
-
-static void nd_log_journal_direct_set_env(void) {
-    if(nd_log.sources[NDLS_COLLECTORS].method == NDLM_JOURNAL)
-        setenv("NETDATA_SYSTEMD_JOURNAL_PATH", nd_log.journal_direct.filename, 1);
-}
-
-static bool nd_log_journal_direct_init(const char *path) {
-    if(nd_log.journal_direct.initialized) {
-        nd_log_journal_direct_set_env();
-        return true;
-    }
-
-    int fd;
-    char filename[FILENAME_MAX + 1];
-    if(!is_path_unix_socket(path)) {
-
-        journal_construct_path(filename, sizeof(filename), netdata_configured_host_prefix, "netdata");
-        if (!is_path_unix_socket(filename) || (fd = journal_direct_fd(filename)) == -1) {
-
-            journal_construct_path(filename, sizeof(filename), netdata_configured_host_prefix, NULL);
-            if (!is_path_unix_socket(filename) || (fd = journal_direct_fd(filename)) == -1) {
-
-                journal_construct_path(filename, sizeof(filename), NULL, "netdata");
-                if (!is_path_unix_socket(filename) || (fd = journal_direct_fd(filename)) == -1) {
-
-                    journal_construct_path(filename, sizeof(filename), NULL, NULL);
-                    if (!is_path_unix_socket(filename) || (fd = journal_direct_fd(filename)) == -1)
-                        return false;
-                }
-            }
-        }
-    }
-    else {
-        snprintfz(filename, sizeof(filename), "%s", path);
-        fd = journal_direct_fd(filename);
-    }
-
-    if(fd < 0)
-        return false;
-
-    nd_log.journal_direct.fd = fd;
-    nd_log.journal_direct.initialized = true;
-
-    strncpyz(nd_log.journal_direct.filename, filename, sizeof(nd_log.journal_direct.filename) - 1);
-    nd_log_journal_direct_set_env();
-
-    return true;
-}
-
-static void nd_log_syslog_init() {
-    if(nd_log.syslog.initialized)
-        return;
-
-    openlog(program_name, LOG_PID, nd_log.syslog.facility);
-    nd_log.syslog.initialized = true;
-}
-
-void nd_log_initialize_for_external_plugins(const char *name) {
-    // if we don't run under Netdata, log to stderr,
-    // otherwise, use the logging method Netdata wants us to use.
-    setenv("NETDATA_LOG_METHOD", "stderr", 0);
-    setenv("NETDATA_LOG_FORMAT", "logfmt", 0);
-
-    nd_log.overwrite_process_source = NDLS_COLLECTORS;
-    program_name = name;
-
-    for(size_t i = 0; i < _NDLS_MAX ;i++) {
-        nd_log.sources[i].method = STDERR_FILENO;
-        nd_log.sources[i].fd = -1;
-        nd_log.sources[i].fp = NULL;
-    }
-
-    nd_log_set_priority_level(getenv("NETDATA_LOG_LEVEL"));
-    nd_log_set_facility(getenv("NETDATA_SYSLOG_FACILITY"));
-
-    time_t period = 1200;
-    size_t logs = 200;
-    const char *s = getenv("NETDATA_ERRORS_THROTTLE_PERIOD");
-    if(s && *s >= '0' && *s <= '9') {
-        period = str2l(s);
-        if(period < 0) period = 0;
-    }
-
-    s = getenv("NETDATA_ERRORS_PER_PERIOD");
-    if(s && *s >= '0' && *s <= '9')
-        logs = str2u(s);
-
-    nd_log_set_flood_protection(logs, period);
-
-    if(!netdata_configured_host_prefix) {
-        s = getenv("NETDATA_HOST_PREFIX");
-        if(s && *s)
-            netdata_configured_host_prefix = (char *)s;
-    }
-
-    ND_LOG_METHOD method = nd_log_method2id(getenv("NETDATA_LOG_METHOD"));
-    ND_LOG_FORMAT format = nd_log_format2id(getenv("NETDATA_LOG_FORMAT"));
-
-    if(!IS_VALID_LOG_METHOD_FOR_EXTERNAL_PLUGINS(method)) {
-        if(is_stderr_connected_to_journal()) {
-            nd_log(NDLS_COLLECTORS, NDLP_WARNING, "NETDATA_LOG_METHOD is not set. Using journal.");
-            method = NDLM_JOURNAL;
-        }
-        else {
-            nd_log(NDLS_COLLECTORS, NDLP_WARNING, "NETDATA_LOG_METHOD is not set. Using stderr.");
-            method = NDLM_STDERR;
-        }
-    }
-
-    switch(method) {
-        case NDLM_JOURNAL:
-            if(!nd_log_journal_direct_init(getenv("NETDATA_SYSTEMD_JOURNAL_PATH")) ||
-               !nd_log_journal_direct_init(NULL) || !nd_log_journal_systemd_init()) {
-                nd_log(NDLS_COLLECTORS, NDLP_WARNING, "Failed to initialize journal. Using stderr.");
-                method = NDLM_STDERR;
-            }
-            break;
-
-        case NDLM_SYSLOG:
-            nd_log_syslog_init();
-            break;
-
-        default:
-            method = NDLM_STDERR;
-            break;
-    }
-
-    for(size_t i = 0; i < _NDLS_MAX ;i++) {
-        nd_log.sources[i].method = method;
-        nd_log.sources[i].format = format;
-        nd_log.sources[i].fd = -1;
-        nd_log.sources[i].fp = NULL;
-    }
-
-//    nd_log(NDLS_COLLECTORS, NDLP_NOTICE, "FINAL_LOG_METHOD: %s", nd_log_id2method(method));
-}
-
-static bool nd_log_replace_existing_fd(struct nd_log_source *e, int new_fd) {
-    if(new_fd == -1 || e->fd == -1 ||
-            (e->fd == STDOUT_FILENO && nd_log.std_output.initialized) ||
-            (e->fd == STDERR_FILENO && nd_log.std_error.initialized))
-        return false;
-
-    if(new_fd != e->fd) {
-        int t = dup2(new_fd, e->fd);
-
-        bool ret = true;
-        if (t == -1) {
-            netdata_log_error("Cannot dup2() new fd %d to old fd %d for '%s'", new_fd, e->fd, e->filename);
-            ret = false;
-        }
-        else
-            close(new_fd);
-
-        if(e->fd == STDOUT_FILENO)
-            nd_log.std_output.initialized = true;
-        else if(e->fd == STDERR_FILENO)
-            nd_log.std_error.initialized = true;
-
-        return ret;
-    }
-
-    return false;
-}
-
-static void nd_log_open(struct nd_log_source *e, ND_LOG_SOURCES source) {
-    if(e->method == NDLM_DEFAULT)
-        nd_log_set_user_settings(source, e->filename);
-
-    if((e->method == NDLM_FILE && !e->filename) ||
-       (e->method == NDLM_DEVNULL && e->fd == -1))
-        e->method = NDLM_DISABLED;
-
-    if(e->fp)
-        fflush(e->fp);
-
-    switch(e->method) {
-        case NDLM_SYSLOG:
-            nd_log_syslog_init();
-            break;
-
-        case NDLM_JOURNAL:
-            nd_log_journal_direct_init(NULL);
-            nd_log_journal_systemd_init();
-            break;
-
-        case NDLM_STDOUT:
-            e->fp = stdout;
-            e->fd = STDOUT_FILENO;
-            break;
-
-        case NDLM_DISABLED:
-            break;
-
-        case NDLM_DEFAULT:
-        case NDLM_STDERR:
-            e->method = NDLM_STDERR;
-            e->fp = stderr;
-            e->fd = STDERR_FILENO;
-            break;
-
-        case NDLM_DEVNULL:
-        case NDLM_FILE: {
-            int fd = open(e->filename, O_WRONLY | O_APPEND | O_CREAT, 0664);
-            if(fd == -1) {
-                if(e->fd != STDOUT_FILENO && e->fd != STDERR_FILENO) {
-                    e->fd = STDERR_FILENO;
-                    e->method = NDLM_STDERR;
-                    netdata_log_error("Cannot open log file '%s'. Falling back to stderr.", e->filename);
-                }
-                else
-                    netdata_log_error("Cannot open log file '%s'. Leaving fd %d as-is.", e->filename, e->fd);
-            }
-            else {
-                if (!nd_log_replace_existing_fd(e, fd)) {
-                    if(e->fd == STDOUT_FILENO || e->fd == STDERR_FILENO) {
-                        if(e->fd == STDOUT_FILENO)
-                            e->method = NDLM_STDOUT;
-                        else if(e->fd == STDERR_FILENO)
-                            e->method = NDLM_STDERR;
-
-                        // we have dup2() fd, so we can close the one we opened
-                        if(fd != STDOUT_FILENO && fd != STDERR_FILENO)
-                            close(fd);
-                    }
-                    else
-                        e->fd = fd;
-                }
-            }
-
-            // at this point we have e->fd set properly
-
-            if(e->fd == STDOUT_FILENO)
-                e->fp = stdout;
-            else if(e->fd == STDERR_FILENO)
-                e->fp = stderr;
-
-            if(!e->fp) {
-                e->fp = fdopen(e->fd, "a");
-                if (!e->fp) {
-                    netdata_log_error("Cannot fdopen() fd %d ('%s')", e->fd, e->filename);
-
-                    if(e->fd != STDOUT_FILENO && e->fd != STDERR_FILENO)
-                        close(e->fd);
-
-                    e->fp = stderr;
-                    e->fd = STDERR_FILENO;
-                }
-            }
-            else {
-                if (setvbuf(e->fp, NULL, _IOLBF, 0) != 0)
-                    netdata_log_error("Cannot set line buffering on fd %d ('%s')", e->fd, e->filename);
-            }
-        }
-        break;
-    }
-}
-
-static void nd_log_stdin_init(int fd, const char *filename) {
-    int f = open(filename, O_WRONLY | O_APPEND | O_CREAT, 0664);
-    if(f == -1)
-        return;
-
-    if(f != fd) {
-        dup2(f, fd);
-        close(f);
-    }
-}
-
-void nd_log_initialize(void) {
-    nd_log_stdin_init(STDIN_FILENO, "/dev/null");
-
-    for(size_t i = 0 ; i < _NDLS_MAX ; i++)
-        nd_log_open(&nd_log.sources[i], i);
-}
-
-void nd_log_reopen_log_files(void) {
-    netdata_log_info("Reopening all log files.");
-
-    nd_log.std_output.initialized = false;
-    nd_log.std_error.initialized = false;
-    nd_log_initialize();
-
-    netdata_log_info("Log files re-opened.");
-}
-
-void chown_open_file(int fd, uid_t uid, gid_t gid) {
-    if(fd == -1) return;
-
-    struct stat buf;
-
-    if(fstat(fd, &buf) == -1) {
-        netdata_log_error("Cannot fstat() fd %d", fd);
-        return;
-    }
-
-    if((buf.st_uid != uid || buf.st_gid != gid) && S_ISREG(buf.st_mode)) {
-        if(fchown(fd, uid, gid) == -1)
-            netdata_log_error("Cannot fchown() fd %d.", fd);
-    }
-}
-
-void nd_log_chown_log_files(uid_t uid, gid_t gid) {
-    for(size_t i = 0 ; i < _NDLS_MAX ; i++) {
-        if(nd_log.sources[i].fd != -1 && nd_log.sources[i].fd != STDIN_FILENO)
-            chown_open_file(nd_log.sources[i].fd, uid, gid);
-    }
-}
-
-// ----------------------------------------------------------------------------
-// annotators
-struct log_field;
-static void errno_annotator(BUFFER *wb, const char *key, struct log_field *lf);
-static void priority_annotator(BUFFER *wb, const char *key, struct log_field *lf);
-static void timestamp_usec_annotator(BUFFER *wb, const char *key, struct log_field *lf);
-
-// ----------------------------------------------------------------------------
-
-typedef void (*annotator_t)(BUFFER *wb, const char *key, struct log_field *lf);
-
-struct log_field {
-    const char *journal;
-    const char *logfmt;
-    annotator_t logfmt_annotator;
-    struct log_stack_entry entry;
-};
-
-#define THREAD_LOG_STACK_MAX 50
-
-static __thread struct log_stack_entry *thread_log_stack_base[THREAD_LOG_STACK_MAX];
-static __thread size_t thread_log_stack_next = 0;
-
-static __thread struct log_field thread_log_fields[_NDF_MAX] = {
-        // THE ORDER DEFINES THE ORDER FIELDS WILL APPEAR IN logfmt
-
-        [NDF_STOP] = { // processing will not stop on this - so it is ok to be first
-                .journal = NULL,
-                .logfmt = NULL,
-                .logfmt_annotator = NULL,
-        },
-        [NDF_TIMESTAMP_REALTIME_USEC] = {
-                .journal = NULL,
-                .logfmt = "time",
-                .logfmt_annotator = timestamp_usec_annotator,
-        },
-        [NDF_SYSLOG_IDENTIFIER] = {
-                .journal = "SYSLOG_IDENTIFIER", // standard journald field
-                .logfmt = "comm",
-        },
-        [NDF_LOG_SOURCE] = {
-                .journal = "ND_LOG_SOURCE",
-                .logfmt = "source",
-        },
-        [NDF_PRIORITY] = {
-                .journal = "PRIORITY", // standard journald field
-                .logfmt = "level",
-                .logfmt_annotator = priority_annotator,
-        },
-        [NDF_ERRNO] = {
-                .journal = "ERRNO", // standard journald field
-                .logfmt = "errno",
-                .logfmt_annotator = errno_annotator,
-        },
-        [NDF_INVOCATION_ID] = {
-                .journal = "INVOCATION_ID", // standard journald field
-                .logfmt = NULL,
-        },
-        [NDF_LINE] = {
-                .journal = "CODE_LINE", // standard journald field
-                .logfmt = NULL,
-        },
-        [NDF_FILE] = {
-                .journal = "CODE_FILE", // standard journald field
-                .logfmt = NULL,
-        },
-        [NDF_FUNC] = {
-                .journal = "CODE_FUNC", // standard journald field
-                .logfmt = NULL,
-        },
-        [NDF_TID] = {
-                .journal = "TID", // standard journald field
-                .logfmt = "tid",
-        },
-        [NDF_THREAD_TAG] = {
-                .journal = "THREAD_TAG",
-                .logfmt = "thread",
-        },
-        [NDF_MESSAGE_ID] = {
-                .journal = "MESSAGE_ID",
-                .logfmt = "msg_id",
-        },
-        [NDF_MODULE] = {
-                .journal = "ND_MODULE",
-                .logfmt = "module",
-        },
-        [NDF_NIDL_NODE] = {
-                .journal = "ND_NIDL_NODE",
-                .logfmt = "node",
-        },
-        [NDF_NIDL_INSTANCE] = {
-                .journal = "ND_NIDL_INSTANCE",
-                .logfmt = "instance",
-        },
-        [NDF_NIDL_CONTEXT] = {
-                .journal = "ND_NIDL_CONTEXT",
-                .logfmt = "context",
-        },
-        [NDF_NIDL_DIMENSION] = {
-                .journal = "ND_NIDL_DIMENSION",
-                .logfmt = "dimension",
-        },
-        [NDF_SRC_TRANSPORT] = {
-                .journal = "ND_SRC_TRANSPORT",
-                .logfmt = "src_transport",
-        },
-        [NDF_SRC_IP] = {
-                .journal = "ND_SRC_IP",
-                .logfmt = "src_ip",
-        },
-        [NDF_SRC_PORT] = {
-                .journal = "ND_SRC_PORT",
-                .logfmt = "src_port",
-        },
-        [NDF_SRC_CAPABILITIES] = {
-                .journal = "ND_SRC_CAPABILITIES",
-                .logfmt = "src_capabilities",
-        },
-        [NDF_DST_TRANSPORT] = {
-                .journal = "ND_DST_TRANSPORT",
-                .logfmt = "dst_transport",
-        },
-        [NDF_DST_IP] = {
-                .journal = "ND_DST_IP",
-                .logfmt = "dst_ip",
-        },
-        [NDF_DST_PORT] = {
-                .journal = "ND_DST_PORT",
-                .logfmt = "dst_port",
-        },
-        [NDF_DST_CAPABILITIES] = {
-                .journal = "ND_DST_CAPABILITIES",
-                .logfmt = "dst_capabilities",
-        },
-        [NDF_REQUEST_METHOD] = {
-                .journal = "ND_REQUEST_METHOD",
-                .logfmt = "req_method",
-        },
-        [NDF_RESPONSE_CODE] = {
-                .journal = "ND_RESPONSE_CODE",
-                .logfmt = "code",
-        },
-        [NDF_CONNECTION_ID] = {
-                .journal = "ND_CONNECTION_ID",
-                .logfmt = "conn",
-        },
-        [NDF_TRANSACTION_ID] = {
-                .journal = "ND_TRANSACTION_ID",
-                .logfmt = "transaction",
-        },
-        [NDF_RESPONSE_SENT_BYTES] = {
-                .journal = "ND_RESPONSE_SENT_BYTES",
-                .logfmt = "sent_bytes",
-        },
-        [NDF_RESPONSE_SIZE_BYTES] = {
-                .journal = "ND_RESPONSE_SIZE_BYTES",
-                .logfmt = "size_bytes",
-        },
-        [NDF_RESPONSE_PREPARATION_TIME_USEC] = {
-                .journal = "ND_RESPONSE_PREP_TIME_USEC",
-                .logfmt = "prep_ut",
-        },
-        [NDF_RESPONSE_SENT_TIME_USEC] = {
-                .journal = "ND_RESPONSE_SENT_TIME_USEC",
-                .logfmt = "sent_ut",
-        },
-        [NDF_RESPONSE_TOTAL_TIME_USEC] = {
-                .journal = "ND_RESPONSE_TOTAL_TIME_USEC",
-                .logfmt = "total_ut",
-        },
-        [NDF_ALERT_ID] = {
-                .journal = "ND_ALERT_ID",
-                .logfmt = "alert_id",
-        },
-        [NDF_ALERT_UNIQUE_ID] = {
-                .journal = "ND_ALERT_UNIQUE_ID",
-                .logfmt = "alert_unique_id",
-        },
-        [NDF_ALERT_TRANSITION_ID] = {
-                .journal = "ND_ALERT_TRANSITION_ID",
-                .logfmt = "alert_transition_id",
-        },
-        [NDF_ALERT_EVENT_ID] = {
-                .journal = "ND_ALERT_EVENT_ID",
-                .logfmt = "alert_event_id",
-        },
-        [NDF_ALERT_CONFIG_HASH] = {
-                .journal = "ND_ALERT_CONFIG",
-                .logfmt = "alert_config",
-        },
-        [NDF_ALERT_NAME] = {
-                .journal = "ND_ALERT_NAME",
-                .logfmt = "alert",
-        },
-        [NDF_ALERT_CLASS] = {
-                .journal = "ND_ALERT_CLASS",
-                .logfmt = "alert_class",
-        },
-        [NDF_ALERT_COMPONENT] = {
-                .journal = "ND_ALERT_COMPONENT",
-                .logfmt = "alert_component",
-        },
-        [NDF_ALERT_TYPE] = {
-                .journal = "ND_ALERT_TYPE",
-                .logfmt = "alert_type",
-        },
-        [NDF_ALERT_EXEC] = {
-                .journal = "ND_ALERT_EXEC",
-                .logfmt = "alert_exec",
-        },
-        [NDF_ALERT_RECIPIENT] = {
-                .journal = "ND_ALERT_RECIPIENT",
-                .logfmt = "alert_recipient",
-        },
-        [NDF_ALERT_VALUE] = {
-                .journal = "ND_ALERT_VALUE",
-                .logfmt = "alert_value",
-        },
-        [NDF_ALERT_VALUE_OLD] = {
-                .journal = "ND_ALERT_VALUE_OLD",
-                .logfmt = "alert_value_old",
-        },
-        [NDF_ALERT_STATUS] = {
-                .journal = "ND_ALERT_STATUS",
-                .logfmt = "alert_status",
-        },
-        [NDF_ALERT_STATUS_OLD] = {
-                .journal = "ND_ALERT_STATUS_OLD",
-                .logfmt = "alert_value_old",
-        },
-        [NDF_ALERT_UNITS] = {
-                .journal = "ND_ALERT_UNITS",
-                .logfmt = "alert_units",
-        },
-        [NDF_ALERT_SUMMARY] = {
-                .journal = "ND_ALERT_SUMMARY",
-                .logfmt = "alert_summary",
-        },
-        [NDF_ALERT_INFO] = {
-                .journal = "ND_ALERT_INFO",
-                .logfmt = "alert_info",
-        },
-        [NDF_ALERT_DURATION] = {
-                .journal = "ND_ALERT_DURATION",
-                .logfmt = "alert_duration",
-        },
-        [NDF_ALERT_NOTIFICATION_REALTIME_USEC] = {
-                .journal = "ND_ALERT_NOTIFICATION_TIMESTAMP_USEC",
-                .logfmt = "alert_notification_timestamp",
-                .logfmt_annotator = timestamp_usec_annotator,
-        },
-
-        // put new items here
-        // leave the request URL and the message last
-
-        [NDF_REQUEST] = {
-                .journal = "ND_REQUEST",
-                .logfmt = "request",
-        },
-        [NDF_MESSAGE] = {
-                .journal = "MESSAGE",
-                .logfmt = "msg",
-        },
-};
-
-#define THREAD_FIELDS_MAX (sizeof(thread_log_fields) / sizeof(thread_log_fields[0]))
-
-ND_LOG_FIELD_ID nd_log_field_id_by_name(const char *field, size_t len) {
-    for(size_t i = 0; i < THREAD_FIELDS_MAX ;i++) {
-        if(thread_log_fields[i].journal && strlen(thread_log_fields[i].journal) == len && strncmp(field, thread_log_fields[i].journal, len) == 0)
-            return i;
-    }
-
-    return NDF_STOP;
-}
-
-void log_stack_pop(void *ptr) {
-    if(!ptr) return;
-
-    struct log_stack_entry *lgs = *(struct log_stack_entry (*)[])ptr;
-
-    if(unlikely(!thread_log_stack_next || lgs != thread_log_stack_base[thread_log_stack_next - 1])) {
-        fatal("You cannot pop in the middle of the stack, or an item not in the stack");
-        return;
-    }
-
-    thread_log_stack_next--;
-}
-
-void log_stack_push(struct log_stack_entry *lgs) {
-    if(!lgs || thread_log_stack_next >= THREAD_LOG_STACK_MAX) return;
-    thread_log_stack_base[thread_log_stack_next++] = lgs;
-}
-
-// ----------------------------------------------------------------------------
-// json formatter
-
-static void nd_logger_json(BUFFER *wb, struct log_field *fields, size_t fields_max) {
-
-    //  --- FIELD_PARSER_VERSIONS ---
-    //
-    // IMPORTANT:
-    // THERE ARE 6 VERSIONS OF THIS CODE
-    //
-    // 1. journal (direct socket API),
-    // 2. journal (libsystemd API),
-    // 3. logfmt,
-    // 4. json,
-    // 5. convert to uint64
-    // 6. convert to int64
-    //
-    // UPDATE ALL OF THEM FOR NEW FEATURES OR FIXES
-
-    buffer_json_initialize(wb, "\"", "\"", 0, true, BUFFER_JSON_OPTIONS_MINIFY);
-    CLEAN_BUFFER *tmp = NULL;
-
-    for (size_t i = 0; i < fields_max; i++) {
-        if (!fields[i].entry.set || !fields[i].logfmt)
-            continue;
-
-        const char *key = fields[i].logfmt;
-
-        const char *s = NULL;
-        switch(fields[i].entry.type) {
-            case NDFT_TXT:
-                s = fields[i].entry.txt;
-                break;
-            case NDFT_STR:
-                s = string2str(fields[i].entry.str);
-                break;
-            case NDFT_BFR:
-                s = buffer_tostring(fields[i].entry.bfr);
-                break;
-            case NDFT_U64:
-                buffer_json_member_add_uint64(wb, key, fields[i].entry.u64);
-                break;
-            case NDFT_I64:
-                buffer_json_member_add_int64(wb, key, fields[i].entry.i64);
-                break;
-            case NDFT_DBL:
-                buffer_json_member_add_double(wb, key, fields[i].entry.dbl);
-                break;
-            case NDFT_UUID:{
-                char u[UUID_COMPACT_STR_LEN];
-                uuid_unparse_lower_compact(*fields[i].entry.uuid, u);
-                buffer_json_member_add_string(wb, key, u);
-            }
-                break;
-            case NDFT_CALLBACK: {
-                if(!tmp)
-                    tmp = buffer_create(1024, NULL);
-                else
-                    buffer_flush(tmp);
-                if(fields[i].entry.cb.formatter(tmp, fields[i].entry.cb.formatter_data))
-                    s = buffer_tostring(tmp);
-                else
-                    s = NULL;
-            }
-                break;
-            default:
-                s = "UNHANDLED";
-                break;
-        }
-
-        if(s && *s)
-            buffer_json_member_add_string(wb, key, s);
-    }
-
-    buffer_json_finalize(wb);
-}
-
-// ----------------------------------------------------------------------------
-// logfmt formatter
-
-
-static int64_t log_field_to_int64(struct log_field *lf) {
-
-    //  --- FIELD_PARSER_VERSIONS ---
-    //
-    // IMPORTANT:
-    // THERE ARE 6 VERSIONS OF THIS CODE
-    //
-    // 1. journal (direct socket API),
-    // 2. journal (libsystemd API),
-    // 3. logfmt,
-    // 4. json,
-    // 5. convert to uint64
-    // 6. convert to int64
-    //
-    // UPDATE ALL OF THEM FOR NEW FEATURES OR FIXES
-
-    CLEAN_BUFFER *tmp = NULL;
-    const char *s = NULL;
-
-    switch(lf->entry.type) {
-        case NDFT_UUID:
-        case NDFT_UNSET:
-            return 0;
-
-        case NDFT_TXT:
-            s = lf->entry.txt;
-            break;
-
-        case NDFT_STR:
-            s = string2str(lf->entry.str);
-            break;
-
-        case NDFT_BFR:
-            s = buffer_tostring(lf->entry.bfr);
-            break;
-
-        case NDFT_CALLBACK:
-            if(!tmp)
-                tmp = buffer_create(0, NULL);
-            else
-                buffer_flush(tmp);
-
-            if(lf->entry.cb.formatter(tmp, lf->entry.cb.formatter_data))
-                s = buffer_tostring(tmp);
-            else
-                s = NULL;
-            break;
-
-        case NDFT_U64:
-            return lf->entry.u64;
-
-        case NDFT_I64:
-            return lf->entry.i64;
-
-        case NDFT_DBL:
-            return lf->entry.dbl;
-    }
-
-    if(s && *s)
-        return str2ll(s, NULL);
-
-    return 0;
-}
-
-static uint64_t log_field_to_uint64(struct log_field *lf) {
-
-    //  --- FIELD_PARSER_VERSIONS ---
-    //
-    // IMPORTANT:
-    // THERE ARE 6 VERSIONS OF THIS CODE
-    //
-    // 1. journal (direct socket API),
-    // 2. journal (libsystemd API),
-    // 3. logfmt,
-    // 4. json,
-    // 5. convert to uint64
-    // 6. convert to int64
-    //
-    // UPDATE ALL OF THEM FOR NEW FEATURES OR FIXES
-
-    CLEAN_BUFFER *tmp = NULL;
-    const char *s = NULL;
-
-    switch(lf->entry.type) {
-        case NDFT_UUID:
-        case NDFT_UNSET:
-            return 0;
-
-        case NDFT_TXT:
-            s = lf->entry.txt;
-            break;
-
-        case NDFT_STR:
-            s = string2str(lf->entry.str);
-            break;
-
-        case NDFT_BFR:
-            s = buffer_tostring(lf->entry.bfr);
-            break;
-
-        case NDFT_CALLBACK:
-            if(!tmp)
-                tmp = buffer_create(0, NULL);
-            else
-                buffer_flush(tmp);
-
-            if(lf->entry.cb.formatter(tmp, lf->entry.cb.formatter_data))
-                s = buffer_tostring(tmp);
-            else
-                s = NULL;
-            break;
-
-        case NDFT_U64:
-            return lf->entry.u64;
-
-        case NDFT_I64:
-            return lf->entry.i64;
-
-        case NDFT_DBL:
-            return lf->entry.dbl;
-    }
-
-    if(s && *s)
-        return str2uint64_t(s, NULL);
-
-    return 0;
-}
-
-static void timestamp_usec_annotator(BUFFER *wb, const char *key, struct log_field *lf) {
-    usec_t ut = log_field_to_uint64(lf);
-
-    if(!ut)
-        return;
-
-    char datetime[RFC3339_MAX_LENGTH];
-    rfc3339_datetime_ut(datetime, sizeof(datetime), ut, 3, false);
-
-    if(buffer_strlen(wb))
-        buffer_fast_strcat(wb, " ", 1);
-
-    buffer_strcat(wb, key);
-    buffer_fast_strcat(wb, "=", 1);
-    buffer_json_strcat(wb, datetime);
-}
-
-static void errno_annotator(BUFFER *wb, const char *key, struct log_field *lf) {
-    int64_t errnum = log_field_to_int64(lf);
-
-    if(errnum == 0)
-        return;
-
-    char buf[1024];
-    const char *s = errno2str(errnum, buf, sizeof(buf));
-
-    if(buffer_strlen(wb))
-        buffer_fast_strcat(wb, " ", 1);
-
-    buffer_strcat(wb, key);
-    buffer_fast_strcat(wb, "=\"", 2);
-    buffer_print_int64(wb, errnum);
-    buffer_fast_strcat(wb, ", ", 2);
-    buffer_json_strcat(wb, s);
-    buffer_fast_strcat(wb, "\"", 1);
-}
-
-static void priority_annotator(BUFFER *wb, const char *key, struct log_field *lf) {
-    uint64_t pri = log_field_to_uint64(lf);
-
-    if(buffer_strlen(wb))
-        buffer_fast_strcat(wb, " ", 1);
-
-    buffer_strcat(wb, key);
-    buffer_fast_strcat(wb, "=", 1);
-    buffer_strcat(wb, nd_log_id2priority(pri));
-}
-
-static bool needs_quotes_for_logfmt(const char *s) {
-    static bool safe_for_logfmt[256] = {
-            [' '] =  true, ['!'] =  true, ['"'] =  false, ['#'] =  true, ['$'] =  true, ['%'] =  true, ['&'] =  true,
-            ['\''] = true, ['('] =  true, [')'] =  true, ['*'] =  true, ['+'] =  true, [','] =  true, ['-'] =  true,
-            ['.'] =  true, ['/'] =  true, ['0'] =  true, ['1'] =  true, ['2'] =  true, ['3'] =  true, ['4'] =  true,
-            ['5'] =  true, ['6'] =  true, ['7'] =  true, ['8'] =  true, ['9'] =  true, [':'] =  true, [';'] =  true,
-            ['<'] =  true, ['='] =  true, ['>'] =  true, ['?'] =  true, ['@'] =  true, ['A'] =  true, ['B'] =  true,
-            ['C'] =  true, ['D'] =  true, ['E'] =  true, ['F'] =  true, ['G'] =  true, ['H'] =  true, ['I'] =  true,
-            ['J'] =  true, ['K'] =  true, ['L'] =  true, ['M'] =  true, ['N'] =  true, ['O'] =  true, ['P'] =  true,
-            ['Q'] =  true, ['R'] =  true, ['S'] =  true, ['T'] =  true, ['U'] =  true, ['V'] =  true, ['W'] =  true,
-            ['X'] =  true, ['Y'] =  true, ['Z'] =  true, ['['] =  true, ['\\'] = false, [']'] =  true, ['^'] =  true,
-            ['_'] =  true, ['`'] =  true, ['a'] =  true, ['b'] =  true, ['c'] =  true, ['d'] =  true, ['e'] =  true,
-            ['f'] =  true, ['g'] =  true, ['h'] =  true, ['i'] =  true, ['j'] =  true, ['k'] =  true, ['l'] =  true,
-            ['m'] =  true, ['n'] =  true, ['o'] =  true, ['p'] =  true, ['q'] =  true, ['r'] =  true, ['s'] =  true,
-            ['t'] =  true, ['u'] =  true, ['v'] =  true, ['w'] =  true, ['x'] =  true, ['y'] =  true, ['z'] =  true,
-            ['{'] =  true, ['|'] =  true, ['}'] =  true, ['~'] =  true, [0x7f] = true,
-    };
-
-    if(!*s)
-        return true;
-
-    while(*s) {
-        if(*s == '=' || isspace(*s) || !safe_for_logfmt[(uint8_t)*s])
-            return true;
-
-        s++;
-    }
-
-    return false;
-}
-
-static void string_to_logfmt(BUFFER *wb, const char *s) {
-    bool spaces = needs_quotes_for_logfmt(s);
-
-    if(spaces)
-        buffer_fast_strcat(wb, "\"", 1);
-
-    buffer_json_strcat(wb, s);
-
-    if(spaces)
-        buffer_fast_strcat(wb, "\"", 1);
-}
-
-static void nd_logger_logfmt(BUFFER *wb, struct log_field *fields, size_t fields_max) {
-
-    //  --- FIELD_PARSER_VERSIONS ---
-    //
-    // IMPORTANT:
-    // THERE ARE 6 VERSIONS OF THIS CODE
-    //
-    // 1. journal (direct socket API),
-    // 2. journal (libsystemd API),
-    // 3. logfmt,
-    // 4. json,
-    // 5. convert to uint64
-    // 6. convert to int64
-    //
-    // UPDATE ALL OF THEM FOR NEW FEATURES OR FIXES
-
-    CLEAN_BUFFER *tmp = NULL;
-
-    for (size_t i = 0; i < fields_max; i++) {
-        if (!fields[i].entry.set || !fields[i].logfmt)
-            continue;
-
-        const char *key = fields[i].logfmt;
-
-        if(fields[i].logfmt_annotator)
-            fields[i].logfmt_annotator(wb, key, &fields[i]);
-        else {
-            if(buffer_strlen(wb))
-                buffer_fast_strcat(wb, " ", 1);
-
-            switch(fields[i].entry.type) {
-                case NDFT_TXT:
-                    if(*fields[i].entry.txt) {
-                        buffer_strcat(wb, key);
-                        buffer_fast_strcat(wb, "=", 1);
-                        string_to_logfmt(wb, fields[i].entry.txt);
-                    }
-                    break;
-                case NDFT_STR:
-                    buffer_strcat(wb, key);
-                    buffer_fast_strcat(wb, "=", 1);
-                    string_to_logfmt(wb, string2str(fields[i].entry.str));
-                    break;
-                case NDFT_BFR:
-                    if(buffer_strlen(fields[i].entry.bfr)) {
-                        buffer_strcat(wb, key);
-                        buffer_fast_strcat(wb, "=", 1);
-                        string_to_logfmt(wb, buffer_tostring(fields[i].entry.bfr));
-                    }
-                    break;
-                case NDFT_U64:
-                    buffer_strcat(wb, key);
-                    buffer_fast_strcat(wb, "=", 1);
-                    buffer_print_uint64(wb, fields[i].entry.u64);
-                    break;
-                case NDFT_I64:
-                    buffer_strcat(wb, key);
-                    buffer_fast_strcat(wb, "=", 1);
-                    buffer_print_int64(wb, fields[i].entry.i64);
-                    break;
-                case NDFT_DBL:
-                    buffer_strcat(wb, key);
-                    buffer_fast_strcat(wb, "=", 1);
-                    buffer_print_netdata_double(wb, fields[i].entry.dbl);
-                    break;
-                case NDFT_UUID: {
-                    char u[UUID_COMPACT_STR_LEN];
-                    uuid_unparse_lower_compact(*fields[i].entry.uuid, u);
-                    buffer_strcat(wb, key);
-                    buffer_fast_strcat(wb, "=", 1);
-                    buffer_fast_strcat(wb, u, sizeof(u) - 1);
-                }
-                    break;
-                case NDFT_CALLBACK: {
-                    if(!tmp)
-                        tmp = buffer_create(1024, NULL);
-                    else
-                        buffer_flush(tmp);
-                    if(fields[i].entry.cb.formatter(tmp, fields[i].entry.cb.formatter_data)) {
-                        buffer_strcat(wb, key);
-                        buffer_fast_strcat(wb, "=", 1);
-                        string_to_logfmt(wb, buffer_tostring(tmp));
-                    }
-                }
-                    break;
-                default:
-                    buffer_strcat(wb, "UNHANDLED");
-                    break;
-            }
-        }
-    }
-}
-
-// ----------------------------------------------------------------------------
-// journal logger
-
-bool nd_log_journal_socket_available(void) {
-    if(netdata_configured_host_prefix && *netdata_configured_host_prefix) {
-        char filename[FILENAME_MAX + 1];
-
-        snprintfz(filename, sizeof(filename), "%s%s",
-                  netdata_configured_host_prefix, "/run/systemd/journal/socket");
-
-        if(is_path_unix_socket(filename))
-            return true;
-    }
-
-    return is_path_unix_socket("/run/systemd/journal/socket");
-}
-
-static bool nd_logger_journal_libsystemd(struct log_field *fields, size_t fields_max) {
-#ifdef HAVE_SYSTEMD
-
-    //  --- FIELD_PARSER_VERSIONS ---
-    //
-    // IMPORTANT:
-    // THERE ARE 6 VERSIONS OF THIS CODE
-    //
-    // 1. journal (direct socket API),
-    // 2. journal (libsystemd API),
-    // 3. logfmt,
-    // 4. json,
-    // 5. convert to uint64
-    // 6. convert to int64
-    //
-    // UPDATE ALL OF THEM FOR NEW FEATURES OR FIXES
-
-    struct iovec iov[fields_max];
-    int iov_count = 0;
-
-    memset(iov, 0, sizeof(iov));
-
-    CLEAN_BUFFER *tmp = NULL;
-
-    for (size_t i = 0; i < fields_max; i++) {
-        if (!fields[i].entry.set || !fields[i].journal)
-            continue;
-
-        const char *key = fields[i].journal;
-        char *value = NULL;
-        switch (fields[i].entry.type) {
-            case NDFT_TXT:
-                if(*fields[i].entry.txt)
-                    asprintf(&value, "%s=%s", key, fields[i].entry.txt);
-                break;
-            case NDFT_STR:
-                asprintf(&value, "%s=%s", key, string2str(fields[i].entry.str));
-                break;
-            case NDFT_BFR:
-                if(buffer_strlen(fields[i].entry.bfr))
-                    asprintf(&value, "%s=%s", key, buffer_tostring(fields[i].entry.bfr));
-                break;
-            case NDFT_U64:
-                asprintf(&value, "%s=%" PRIu64, key, fields[i].entry.u64);
-                break;
-            case NDFT_I64:
-                asprintf(&value, "%s=%" PRId64, key, fields[i].entry.i64);
-                break;
-            case NDFT_DBL:
-                asprintf(&value, "%s=%f", key, fields[i].entry.dbl);
-                break;
-            case NDFT_UUID: {
-                char u[UUID_COMPACT_STR_LEN];
-                uuid_unparse_lower_compact(*fields[i].entry.uuid, u);
-                asprintf(&value, "%s=%s", key, u);
-            }
-                break;
-            case NDFT_CALLBACK: {
-                if(!tmp)
-                    tmp = buffer_create(1024, NULL);
-                else
-                    buffer_flush(tmp);
-                if(fields[i].entry.cb.formatter(tmp, fields[i].entry.cb.formatter_data))
-                    asprintf(&value, "%s=%s", key, buffer_tostring(tmp));
-            }
-                break;
-            default:
-                asprintf(&value, "%s=%s", key, "UNHANDLED");
-                break;
-        }
-
-        if (value) {
-            iov[iov_count].iov_base = value;
-            iov[iov_count].iov_len = strlen(value);
-            iov_count++;
-        }
-    }
-
-    int r = sd_journal_sendv(iov, iov_count);
-
-    // Clean up allocated memory
-    for (int i = 0; i < iov_count; i++) {
-        if (iov[i].iov_base != NULL) {
-            free(iov[i].iov_base);
-        }
-    }
-
-    return r == 0;
-#else
-    return false;
-#endif
-}
-
-static bool nd_logger_journal_direct(struct log_field *fields, size_t fields_max) {
-    if(!nd_log.journal_direct.initialized)
-        return false;
-
-    //  --- FIELD_PARSER_VERSIONS ---
-    //
-    // IMPORTANT:
-    // THERE ARE 6 VERSIONS OF THIS CODE
-    //
-    // 1. journal (direct socket API),
-    // 2. journal (libsystemd API),
-    // 3. logfmt,
-    // 4. json,
-    // 5. convert to uint64
-    // 6. convert to int64
-    //
-    // UPDATE ALL OF THEM FOR NEW FEATURES OR FIXES
-
-    CLEAN_BUFFER *wb = buffer_create(4096, NULL);
-    CLEAN_BUFFER *tmp = NULL;
-
-    for (size_t i = 0; i < fields_max; i++) {
-        if (!fields[i].entry.set || !fields[i].journal)
-            continue;
-
-        const char *key = fields[i].journal;
-
-        const char *s = NULL;
-        switch(fields[i].entry.type) {
-            case NDFT_TXT:
-                s = fields[i].entry.txt;
-                break;
-            case NDFT_STR:
-                s = string2str(fields[i].entry.str);
-                break;
-            case NDFT_BFR:
-                s = buffer_tostring(fields[i].entry.bfr);
-                break;
-            case NDFT_U64:
-                buffer_strcat(wb, key);
-                buffer_putc(wb, '=');
-                buffer_print_uint64(wb, fields[i].entry.u64);
-                buffer_putc(wb, '\n');
-                break;
-            case NDFT_I64:
-                buffer_strcat(wb, key);
-                buffer_putc(wb, '=');
-                buffer_print_int64(wb, fields[i].entry.i64);
-                buffer_putc(wb, '\n');
-                break;
-            case NDFT_DBL:
-                buffer_strcat(wb, key);
-                buffer_putc(wb, '=');
-                buffer_print_netdata_double(wb, fields[i].entry.dbl);
-                buffer_putc(wb, '\n');
-                break;
-            case NDFT_UUID:{
-                char u[UUID_COMPACT_STR_LEN];
-                uuid_unparse_lower_compact(*fields[i].entry.uuid, u);
-                buffer_strcat(wb, key);
-                buffer_putc(wb, '=');
-                buffer_fast_strcat(wb, u, sizeof(u) - 1);
-                buffer_putc(wb, '\n');
-            }
-                break;
-            case NDFT_CALLBACK: {
-                if(!tmp)
-                    tmp = buffer_create(1024, NULL);
-                else
-                    buffer_flush(tmp);
-                if(fields[i].entry.cb.formatter(tmp, fields[i].entry.cb.formatter_data))
-                    s = buffer_tostring(tmp);
-                else
-                    s = NULL;
-            }
-                break;
-            default:
-                s = "UNHANDLED";
-                break;
-        }
-
-        if(s && *s) {
-            buffer_strcat(wb, key);
-            if(!strchr(s, '\n')) {
-                buffer_putc(wb, '=');
-                buffer_strcat(wb, s);
-                buffer_putc(wb, '\n');
-            }
-            else {
-                buffer_putc(wb, '\n');
-                size_t size = strlen(s);
-                uint64_t le_size = htole64(size);
-                buffer_memcat(wb, &le_size, sizeof(le_size));
-                buffer_memcat(wb, s, size);
-                buffer_putc(wb, '\n');
-            }
-        }
-    }
-
-    return journal_direct_send(nd_log.journal_direct.fd, buffer_tostring(wb), buffer_strlen(wb));
-}
-
-// ----------------------------------------------------------------------------
-// syslog logger - uses logfmt
-
-static bool nd_logger_syslog(int priority, ND_LOG_FORMAT format, struct log_field *fields, size_t fields_max) {
-    CLEAN_BUFFER *wb = buffer_create(1024, NULL);
-
-    nd_logger_logfmt(wb, fields, fields_max);
-    syslog(priority, "%s", buffer_tostring(wb));
-
-    return true;
-}
-
-// ----------------------------------------------------------------------------
-// file logger - uses logfmt
-
-static bool nd_logger_file(FILE *fp, ND_LOG_FORMAT format, struct log_field *fields, size_t fields_max) {
-    BUFFER *wb = buffer_create(1024, NULL);
-
-    if(format == NDLF_JSON)
-        nd_logger_json(wb, fields, fields_max);
-    else
-        nd_logger_logfmt(wb, fields, fields_max);
-
-    int r = fprintf(fp, "%s\n", buffer_tostring(wb));
-    fflush(fp);
-
-    buffer_free(wb);
-    return r > 0;
-}
-
-// ----------------------------------------------------------------------------
-// logger router
-
-static ND_LOG_METHOD nd_logger_select_output(ND_LOG_SOURCES source, FILE **fpp, SPINLOCK **spinlock) {
-    *spinlock = NULL;
-    ND_LOG_METHOD output = nd_log.sources[source].method;
-
-    switch(output) {
-        case NDLM_JOURNAL:
-            if(unlikely(!nd_log.journal_direct.initialized && !nd_log.journal.initialized)) {
-                output = NDLM_FILE;
-                *fpp = stderr;
-                *spinlock = &nd_log.std_error.spinlock;
-            }
-            else {
-                *fpp = NULL;
-                *spinlock = NULL;
-            }
-            break;
-
-        case NDLM_SYSLOG:
-            if(unlikely(!nd_log.syslog.initialized)) {
-                output = NDLM_FILE;
-                *spinlock = &nd_log.std_error.spinlock;
-                *fpp = stderr;
-            }
-            else {
-                *spinlock = NULL;
-                *fpp = NULL;
-            }
-            break;
-
-        case NDLM_FILE:
-            if(!nd_log.sources[source].fp) {
-                *fpp = stderr;
-                *spinlock = &nd_log.std_error.spinlock;
-            }
-            else {
-                *fpp = nd_log.sources[source].fp;
-                *spinlock = &nd_log.sources[source].spinlock;
-            }
-            break;
-
-        case NDLM_STDOUT:
-            output = NDLM_FILE;
-            *fpp = stdout;
-            *spinlock = &nd_log.std_output.spinlock;
-            break;
-
-        default:
-        case NDLM_DEFAULT:
-        case NDLM_STDERR:
-            output = NDLM_FILE;
-            *fpp = stderr;
-            *spinlock = &nd_log.std_error.spinlock;
-            break;
-
-        case NDLM_DISABLED:
-        case NDLM_DEVNULL:
-            output = NDLM_DISABLED;
-            *fpp = NULL;
-            *spinlock = NULL;
-            break;
-    }
-
-    return output;
-}
-
-// ----------------------------------------------------------------------------
-// high level logger
-
-static void nd_logger_log_fields(SPINLOCK *spinlock, FILE *fp, bool limit, ND_LOG_FIELD_PRIORITY priority,
-                                 ND_LOG_METHOD output, struct nd_log_source *source,
-                                 struct log_field *fields, size_t fields_max) {
-    if(spinlock)
-        spinlock_lock(spinlock);
-
-    // check the limits
-    if(limit && nd_log_limit_reached(source))
-        goto cleanup;
-
-    if(output == NDLM_JOURNAL) {
-        if(!nd_logger_journal_direct(fields, fields_max) && !nd_logger_journal_libsystemd(fields, fields_max)) {
-            // we can't log to journal, let's log to stderr
-            if(spinlock)
-                spinlock_unlock(spinlock);
-
-            output = NDLM_FILE;
-            spinlock = &nd_log.std_error.spinlock;
-            fp = stderr;
-
-            if(spinlock)
-                spinlock_lock(spinlock);
-        }
-    }
-
-    if(output == NDLM_SYSLOG)
-        nd_logger_syslog(priority, source->format, fields, fields_max);
-
-    if(output == NDLM_FILE)
-        nd_logger_file(fp, source->format, fields, fields_max);
-
-
-cleanup:
-    if(spinlock)
-        spinlock_unlock(spinlock);
-}
-
-static void nd_logger_unset_all_thread_fields(void) {
-    size_t fields_max = THREAD_FIELDS_MAX;
-    for(size_t i = 0; i < fields_max ; i++)
-        thread_log_fields[i].entry.set = false;
-}
-
-static void nd_logger_merge_log_stack_to_thread_fields(void) {
-    for(size_t c = 0; c < thread_log_stack_next ;c++) {
-        struct log_stack_entry *lgs = thread_log_stack_base[c];
-
-        for(size_t i = 0; lgs[i].id != NDF_STOP ; i++) {
-            if(lgs[i].id >= _NDF_MAX || !lgs[i].set)
-                continue;
-
-            struct log_stack_entry *e = &lgs[i];
-            ND_LOG_STACK_FIELD_TYPE type = lgs[i].type;
-
-            // do not add empty / unset fields
-            if((type == NDFT_TXT && (!e->txt || !*e->txt)) ||
-                (type == NDFT_BFR && (!e->bfr || !buffer_strlen(e->bfr))) ||
-                (type == NDFT_STR && !e->str) ||
-                (type == NDFT_UUID && !e->uuid) ||
-                (type == NDFT_CALLBACK && !e->cb.formatter) ||
-                type == NDFT_UNSET)
-                continue;
-
-            thread_log_fields[lgs[i].id].entry = *e;
-        }
-    }
-}
-
-static void nd_logger(const char *file, const char *function, const unsigned long line,
-               ND_LOG_SOURCES source, ND_LOG_FIELD_PRIORITY priority, bool limit, int saved_errno,
-               const char *fmt, va_list ap) {
-
-    SPINLOCK *spinlock;
-    FILE *fp;
-    ND_LOG_METHOD output = nd_logger_select_output(source, &fp, &spinlock);
-    if(output != NDLM_FILE && output != NDLM_JOURNAL && output != NDLM_SYSLOG)
-        return;
-
-    // mark all fields as unset
-    nd_logger_unset_all_thread_fields();
-
-    // flatten the log stack into the fields
-    nd_logger_merge_log_stack_to_thread_fields();
-
-    // set the common fields that are automatically set by the logging subsystem
-
-    if(likely(!thread_log_fields[NDF_INVOCATION_ID].entry.set))
-        thread_log_fields[NDF_INVOCATION_ID].entry = ND_LOG_FIELD_UUID(NDF_INVOCATION_ID, &nd_log.invocation_id);
-
-    if(likely(!thread_log_fields[NDF_LOG_SOURCE].entry.set))
-        thread_log_fields[NDF_LOG_SOURCE].entry = ND_LOG_FIELD_TXT(NDF_LOG_SOURCE, nd_log_id2source(source));
-    else {
-        ND_LOG_SOURCES src = source;
-
-        if(thread_log_fields[NDF_LOG_SOURCE].entry.type == NDFT_TXT)
-            src = nd_log_source2id(thread_log_fields[NDF_LOG_SOURCE].entry.txt, source);
-        else if(thread_log_fields[NDF_LOG_SOURCE].entry.type == NDFT_U64)
-            src = thread_log_fields[NDF_LOG_SOURCE].entry.u64;
-
-        if(src != source && src >= 0 && src < _NDLS_MAX) {
-            source = src;
-            output = nd_logger_select_output(source, &fp, &spinlock);
-            if(output != NDLM_FILE && output != NDLM_JOURNAL && output != NDLM_SYSLOG)
-                return;
-        }
-    }
-
-    if(likely(!thread_log_fields[NDF_SYSLOG_IDENTIFIER].entry.set))
-        thread_log_fields[NDF_SYSLOG_IDENTIFIER].entry = ND_LOG_FIELD_TXT(NDF_SYSLOG_IDENTIFIER, program_name);
-
-    if(likely(!thread_log_fields[NDF_LINE].entry.set)) {
-        thread_log_fields[NDF_LINE].entry = ND_LOG_FIELD_U64(NDF_LINE, line);
-        thread_log_fields[NDF_FILE].entry = ND_LOG_FIELD_TXT(NDF_FILE, file);
-        thread_log_fields[NDF_FUNC].entry = ND_LOG_FIELD_TXT(NDF_FUNC, function);
-    }
-
-    if(likely(!thread_log_fields[NDF_PRIORITY].entry.set)) {
-        thread_log_fields[NDF_PRIORITY].entry = ND_LOG_FIELD_U64(NDF_PRIORITY, priority);
-    }
-
-    if(likely(!thread_log_fields[NDF_TID].entry.set))
-        thread_log_fields[NDF_TID].entry = ND_LOG_FIELD_U64(NDF_TID, gettid());
-
-    char os_threadname[NETDATA_THREAD_NAME_MAX + 1];
-    if(likely(!thread_log_fields[NDF_THREAD_TAG].entry.set)) {
-        const char *thread_tag = netdata_thread_tag();
-        if(!netdata_thread_tag_exists()) {
-            if (!netdata_thread_tag_exists()) {
-                os_thread_get_current_name_np(os_threadname);
-                if ('\0' != os_threadname[0])
-                    /* If it is not an empty string replace "MAIN" thread_tag */
-                    thread_tag = os_threadname;
-            }
-        }
-        thread_log_fields[NDF_THREAD_TAG].entry = ND_LOG_FIELD_TXT(NDF_THREAD_TAG, thread_tag);
-
-        // TODO: fix the ND_MODULE in logging by setting proper module name in threads
-//        if(!thread_log_fields[NDF_MODULE].entry.set)
-//            thread_log_fields[NDF_MODULE].entry = ND_LOG_FIELD_CB(NDF_MODULE, thread_tag_to_module, (void *)thread_tag);
-    }
-
-    if(likely(!thread_log_fields[NDF_TIMESTAMP_REALTIME_USEC].entry.set))
-        thread_log_fields[NDF_TIMESTAMP_REALTIME_USEC].entry = ND_LOG_FIELD_U64(NDF_TIMESTAMP_REALTIME_USEC, now_realtime_usec());
-
-    if(saved_errno != 0 && !thread_log_fields[NDF_ERRNO].entry.set)
-        thread_log_fields[NDF_ERRNO].entry = ND_LOG_FIELD_I64(NDF_ERRNO, saved_errno);
-
-    CLEAN_BUFFER *wb = NULL;
-    if(fmt && !thread_log_fields[NDF_MESSAGE].entry.set) {
-        wb = buffer_create(1024, NULL);
-        buffer_vsprintf(wb, fmt, ap);
-        thread_log_fields[NDF_MESSAGE].entry = ND_LOG_FIELD_TXT(NDF_MESSAGE, buffer_tostring(wb));
-    }
-
-    nd_logger_log_fields(spinlock, fp, limit, priority, output, &nd_log.sources[source],
-                         thread_log_fields, THREAD_FIELDS_MAX);
-
-    if(nd_log.sources[source].pending_msg) {
-        // log a pending message
-
-        nd_logger_unset_all_thread_fields();
-
-        thread_log_fields[NDF_TIMESTAMP_REALTIME_USEC].entry = (struct log_stack_entry){
-                .set = true,
-                .type = NDFT_U64,
-                .u64 = now_realtime_usec(),
-        };
-
-        thread_log_fields[NDF_LOG_SOURCE].entry = (struct log_stack_entry){
-                .set = true,
-                .type = NDFT_TXT,
-                .txt = nd_log_id2source(source),
-        };
-
-        thread_log_fields[NDF_SYSLOG_IDENTIFIER].entry = (struct log_stack_entry){
-                .set = true,
-                .type = NDFT_TXT,
-                .txt = program_name,
-        };
-
-        thread_log_fields[NDF_MESSAGE].entry = (struct log_stack_entry){
-                .set = true,
-                .type = NDFT_TXT,
-                .txt = nd_log.sources[source].pending_msg,
-        };
-
-        nd_logger_log_fields(spinlock, fp, false, priority, output,
-                             &nd_log.sources[source],
-                             thread_log_fields, THREAD_FIELDS_MAX);
-
-        freez((void *)nd_log.sources[source].pending_msg);
-        nd_log.sources[source].pending_msg = NULL;
-    }
-
-    errno = 0;
-}
-
-static ND_LOG_SOURCES nd_log_validate_source(ND_LOG_SOURCES source) {
-    if(source >= _NDLS_MAX)
-        source = NDLS_DAEMON;
-
-    if(overwrite_thread_source)
-        source = overwrite_thread_source;
-
-    if(nd_log.overwrite_process_source)
-        source = nd_log.overwrite_process_source;
-
-    return source;
-}
-
-// ----------------------------------------------------------------------------
-// public API for loggers
-
-void netdata_logger(ND_LOG_SOURCES source, ND_LOG_FIELD_PRIORITY priority, const char *file, const char *function, unsigned long line, const char *fmt, ... ) {
-    int saved_errno = errno;
-    source = nd_log_validate_source(source);
-
-    if (source != NDLS_DEBUG && priority > nd_log.sources[source].min_priority)
-        return;
-
-    va_list args;
-    va_start(args, fmt);
-    nd_logger(file, function, line, source, priority,
-              source == NDLS_DAEMON || source == NDLS_COLLECTORS,
-              saved_errno, fmt, args);
-    va_end(args);
-}
-
-void netdata_logger_with_limit(ERROR_LIMIT *erl, ND_LOG_SOURCES source, ND_LOG_FIELD_PRIORITY priority, const char *file __maybe_unused, const char *function __maybe_unused, const unsigned long line __maybe_unused, const char *fmt, ... ) {
-    int saved_errno = errno;
-    source = nd_log_validate_source(source);
-
-    if (source != NDLS_DEBUG && priority > nd_log.sources[source].min_priority)
-        return;
-
-    if(erl->sleep_ut)
-        sleep_usec(erl->sleep_ut);
-
-    spinlock_lock(&erl->spinlock);
-
-    erl->count++;
-    time_t now = now_boottime_sec();
-    if(now - erl->last_logged < erl->log_every) {
-        spinlock_unlock(&erl->spinlock);
-        return;
-    }
-
-    spinlock_unlock(&erl->spinlock);
-
-    va_list args;
-    va_start(args, fmt);
-    nd_logger(file, function, line, source, priority,
-            source == NDLS_DAEMON || source == NDLS_COLLECTORS,
-            saved_errno, fmt, args);
-    va_end(args);
-    erl->last_logged = now;
-    erl->count = 0;
-}
-
-void netdata_logger_fatal( const char *file, const char *function, const unsigned long line, const char *fmt, ... ) {
-    int saved_errno = errno;
-    ND_LOG_SOURCES source = NDLS_DAEMON;
-    source = nd_log_validate_source(source);
-
-    va_list args;
-    va_start(args, fmt);
-    nd_logger(file, function, line, source, NDLP_ALERT, true, saved_errno, fmt, args);
-    va_end(args);
-
-    char date[LOG_DATE_LENGTH];
-    log_date(date, LOG_DATE_LENGTH, now_realtime_sec());
-
-    char action_data[70+1];
-    snprintfz(action_data, 70, "%04lu@%-10.10s:%-15.15s/%d", line, file, function, saved_errno);
-    char action_result[60+1];
-
-    char os_threadname[NETDATA_THREAD_NAME_MAX + 1];
-    const char *thread_tag = netdata_thread_tag();
-    if(!netdata_thread_tag_exists()) {
-        if (!netdata_thread_tag_exists()) {
-            os_thread_get_current_name_np(os_threadname);
-            if ('\0' != os_threadname[0])
-                /* If it is not an empty string replace "MAIN" thread_tag */
-                thread_tag = os_threadname;
-        }
-    }
-    if(!thread_tag)
-        thread_tag = "UNKNOWN";
-
-    const char *tag_to_send =  thread_tag;
-
-    // anonymize thread names
-    if(strncmp(thread_tag, THREAD_TAG_STREAM_RECEIVER, strlen(THREAD_TAG_STREAM_RECEIVER)) == 0)
-        tag_to_send = THREAD_TAG_STREAM_RECEIVER;
-    if(strncmp(thread_tag, THREAD_TAG_STREAM_SENDER, strlen(THREAD_TAG_STREAM_SENDER)) == 0)
-        tag_to_send = THREAD_TAG_STREAM_SENDER;
-
-    snprintfz(action_result, 60, "%s:%s", program_name, tag_to_send);
-    send_statistics("FATAL", action_result, action_data);
-
-#ifdef HAVE_BACKTRACE
-    int fd = nd_log.sources[NDLS_DAEMON].fd;
-    if(fd == -1)
-        fd = STDERR_FILENO;
-
-    int nptrs;
-    void *buffer[10000];
-
-    nptrs = backtrace(buffer, sizeof(buffer));
-    if(nptrs)
-        backtrace_symbols_fd(buffer, nptrs, fd);
-#endif
-
-#ifdef NETDATA_INTERNAL_CHECKS
-    abort();
-#endif
-
-    netdata_cleanup_and_exit(1);
-}
-
-// ----------------------------------------------------------------------------
-// log limits
-
-void nd_log_limits_reset(void) {
-    usec_t now_ut = now_monotonic_usec();
-
-    spinlock_lock(&nd_log.std_output.spinlock);
-    spinlock_lock(&nd_log.std_error.spinlock);
-
-    for(size_t i = 0; i < _NDLS_MAX ;i++) {
-        spinlock_lock(&nd_log.sources[i].spinlock);
-        nd_log.sources[i].limits.prevented = 0;
-        nd_log.sources[i].limits.counter = 0;
-        nd_log.sources[i].limits.started_monotonic_ut = now_ut;
-        nd_log.sources[i].limits.logs_per_period = nd_log.sources[i].limits.logs_per_period_backup;
-        spinlock_unlock(&nd_log.sources[i].spinlock);
-    }
-
-    spinlock_unlock(&nd_log.std_output.spinlock);
-    spinlock_unlock(&nd_log.std_error.spinlock);
-}
-
-void nd_log_limits_unlimited(void) {
-    nd_log_limits_reset();
-    for(size_t i = 0; i < _NDLS_MAX ;i++) {
-        nd_log.sources[i].limits.logs_per_period = 0;
-    }
-}
-
-static bool nd_log_limit_reached(struct nd_log_source *source) {
-    if(source->limits.throttle_period == 0 || source->limits.logs_per_period == 0)
-        return false;
-
-    usec_t now_ut = now_monotonic_usec();
-    if(!source->limits.started_monotonic_ut)
-        source->limits.started_monotonic_ut = now_ut;
-
-    source->limits.counter++;
-
-    if(now_ut - source->limits.started_monotonic_ut > (usec_t)source->limits.throttle_period) {
-        if(source->limits.prevented) {
-            BUFFER *wb = buffer_create(1024, NULL);
-            buffer_sprintf(wb,
-                           "LOG FLOOD PROTECTION: resuming logging "
-                           "(prevented %"PRIu32" logs in the last %"PRIu32" seconds).",
-                           source->limits.prevented,
-                           source->limits.throttle_period);
-
-            if(source->pending_msg)
-                freez((void *)source->pending_msg);
-
-            source->pending_msg = strdupz(buffer_tostring(wb));
-
-            buffer_free(wb);
-        }
-
-        // restart the period accounting
-        source->limits.started_monotonic_ut = now_ut;
-        source->limits.counter = 1;
-        source->limits.prevented = 0;
-
-        // log this error
-        return false;
-    }
-
-    if(source->limits.counter > source->limits.logs_per_period) {
-        if(!source->limits.prevented) {
-            BUFFER *wb = buffer_create(1024, NULL);
-            buffer_sprintf(wb,
-                    "LOG FLOOD PROTECTION: too many logs (%"PRIu32" logs in %"PRId64" seconds, threshold is set to %"PRIu32" logs "
-                    "in %"PRIu32" seconds). Preventing more logs from process '%s' for %"PRId64" seconds.",
-                    source->limits.counter,
-                    (int64_t)((now_ut - source->limits.started_monotonic_ut) / USEC_PER_SEC),
-                    source->limits.logs_per_period,
-                    source->limits.throttle_period,
-                    program_name,
-                    (int64_t)((source->limits.started_monotonic_ut + (source->limits.throttle_period * USEC_PER_SEC) - now_ut)) / USEC_PER_SEC);
-
-            if(source->pending_msg)
-                freez((void *)source->pending_msg);
-
-            source->pending_msg = strdupz(buffer_tostring(wb));
-
-            buffer_free(wb);
-        }
-
-        source->limits.prevented++;
-
-        // prevent logging this error
-#ifdef NETDATA_INTERNAL_CHECKS
-        return false;
-#else
-        return true;
-#endif
-    }
-
-    return false;
-}