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-rw-r--r--libnetdata/log/log.c2431
1 files changed, 2431 insertions, 0 deletions
diff --git a/libnetdata/log/log.c b/libnetdata/log/log.c
new file mode 100644
index 00000000..c805716c
--- /dev/null
+++ b/libnetdata/log/log.c
@@ -0,0 +1,2431 @@
+// 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;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-14 17:35:26 +0000