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authorDaniel Baumann <daniel.baumann@progress-linux.org>2018-11-07 12:19:29 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2018-11-07 12:20:17 +0000
commita64a253794ac64cb40befee54db53bde17dd0d49 (patch)
treec1024acc5f6e508814b944d99f112259bb28b1be /database/rrdhost.c
parentNew upstream version 1.10.0+dfsg (diff)
downloadnetdata-a64a253794ac64cb40befee54db53bde17dd0d49.tar.xz
netdata-a64a253794ac64cb40befee54db53bde17dd0d49.zip
New upstream version 1.11.0+dfsgupstream/1.11.0+dfsg
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'database/rrdhost.c')
-rw-r--r--database/rrdhost.c743
1 files changed, 743 insertions, 0 deletions
diff --git a/database/rrdhost.c b/database/rrdhost.c
new file mode 100644
index 000000000..43aa2daa2
--- /dev/null
+++ b/database/rrdhost.c
@@ -0,0 +1,743 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#define NETDATA_RRD_INTERNALS
+#include "rrd.h"
+
+RRDHOST *localhost = NULL;
+size_t rrd_hosts_available = 0;
+netdata_rwlock_t rrd_rwlock = NETDATA_RWLOCK_INITIALIZER;
+
+time_t rrdset_free_obsolete_time = 3600;
+time_t rrdhost_free_orphan_time = 3600;
+
+// ----------------------------------------------------------------------------
+// RRDHOST index
+
+int rrdhost_compare(void* a, void* b) {
+ if(((RRDHOST *)a)->hash_machine_guid < ((RRDHOST *)b)->hash_machine_guid) return -1;
+ else if(((RRDHOST *)a)->hash_machine_guid > ((RRDHOST *)b)->hash_machine_guid) return 1;
+ else return strcmp(((RRDHOST *)a)->machine_guid, ((RRDHOST *)b)->machine_guid);
+}
+
+avl_tree_lock rrdhost_root_index = {
+ .avl_tree = { NULL, rrdhost_compare },
+ .rwlock = AVL_LOCK_INITIALIZER
+};
+
+RRDHOST *rrdhost_find_by_guid(const char *guid, uint32_t hash) {
+ debug(D_RRDHOST, "Searching in index for host with guid '%s'", guid);
+
+ RRDHOST tmp;
+ strncpyz(tmp.machine_guid, guid, GUID_LEN);
+ tmp.hash_machine_guid = (hash)?hash:simple_hash(tmp.machine_guid);
+
+ return (RRDHOST *)avl_search_lock(&(rrdhost_root_index), (avl *) &tmp);
+}
+
+RRDHOST *rrdhost_find_by_hostname(const char *hostname, uint32_t hash) {
+ if(unlikely(!strcmp(hostname, "localhost")))
+ return localhost;
+
+ if(unlikely(!hash)) hash = simple_hash(hostname);
+
+ rrd_rdlock();
+ RRDHOST *host;
+ rrdhost_foreach_read(host) {
+ if(unlikely((hash == host->hash_hostname && !strcmp(hostname, host->hostname)))) {
+ rrd_unlock();
+ return host;
+ }
+ }
+ rrd_unlock();
+
+ return NULL;
+}
+
+#define rrdhost_index_add(rrdhost) (RRDHOST *)avl_insert_lock(&(rrdhost_root_index), (avl *)(rrdhost))
+#define rrdhost_index_del(rrdhost) (RRDHOST *)avl_remove_lock(&(rrdhost_root_index), (avl *)(rrdhost))
+
+
+// ----------------------------------------------------------------------------
+// RRDHOST - internal helpers
+
+static inline void rrdhost_init_tags(RRDHOST *host, const char *tags) {
+ if(host->tags && tags && !strcmp(host->tags, tags))
+ return;
+
+ void *old = (void *)host->tags;
+ host->tags = (tags && *tags)?strdupz(tags):NULL;
+ freez(old);
+}
+
+static inline void rrdhost_init_hostname(RRDHOST *host, const char *hostname) {
+ if(host->hostname && hostname && !strcmp(host->hostname, hostname))
+ return;
+
+ void *old = host->hostname;
+ host->hostname = strdupz(hostname?hostname:"localhost");
+ host->hash_hostname = simple_hash(host->hostname);
+ freez(old);
+}
+
+static inline void rrdhost_init_os(RRDHOST *host, const char *os) {
+ if(host->os && os && !strcmp(host->os, os))
+ return;
+
+ void *old = (void *)host->os;
+ host->os = strdupz(os?os:"unknown");
+ freez(old);
+}
+
+static inline void rrdhost_init_timezone(RRDHOST *host, const char *timezone) {
+ if(host->timezone && timezone && !strcmp(host->timezone, timezone))
+ return;
+
+ void *old = (void *)host->timezone;
+ host->timezone = strdupz((timezone && *timezone)?timezone:"unknown");
+ freez(old);
+}
+
+static inline void rrdhost_init_machine_guid(RRDHOST *host, const char *machine_guid) {
+ strncpy(host->machine_guid, machine_guid, GUID_LEN);
+ host->machine_guid[GUID_LEN] = '\0';
+ host->hash_machine_guid = simple_hash(host->machine_guid);
+}
+
+
+// ----------------------------------------------------------------------------
+// RRDHOST - add a host
+
+RRDHOST *rrdhost_create(const char *hostname,
+ const char *registry_hostname,
+ const char *guid,
+ const char *os,
+ const char *timezone,
+ const char *tags,
+ const char *program_name,
+ const char *program_version,
+ int update_every,
+ long entries,
+ RRD_MEMORY_MODE memory_mode,
+ unsigned int health_enabled,
+ unsigned int rrdpush_enabled,
+ char *rrdpush_destination,
+ char *rrdpush_api_key,
+ char *rrdpush_send_charts_matching,
+ int is_localhost
+) {
+ debug(D_RRDHOST, "Host '%s': adding with guid '%s'", hostname, guid);
+
+ rrd_check_wrlock();
+
+ RRDHOST *host = callocz(1, sizeof(RRDHOST));
+
+ host->rrd_update_every = (update_every > 0)?update_every:1;
+ host->rrd_history_entries = align_entries_to_pagesize(memory_mode, entries);
+ host->rrd_memory_mode = memory_mode;
+ host->health_enabled = (memory_mode == RRD_MEMORY_MODE_NONE)? 0 : health_enabled;
+ host->rrdpush_send_enabled = (rrdpush_enabled && rrdpush_destination && *rrdpush_destination && rrdpush_api_key && *rrdpush_api_key) ? 1 : 0;
+ host->rrdpush_send_destination = (host->rrdpush_send_enabled)?strdupz(rrdpush_destination):NULL;
+ host->rrdpush_send_api_key = (host->rrdpush_send_enabled)?strdupz(rrdpush_api_key):NULL;
+ host->rrdpush_send_charts_matching = simple_pattern_create(rrdpush_send_charts_matching, NULL, SIMPLE_PATTERN_EXACT);
+
+ host->rrdpush_sender_pipe[0] = -1;
+ host->rrdpush_sender_pipe[1] = -1;
+ host->rrdpush_sender_socket = -1;
+
+ netdata_mutex_init(&host->rrdpush_sender_buffer_mutex);
+ netdata_rwlock_init(&host->rrdhost_rwlock);
+
+ rrdhost_init_hostname(host, hostname);
+ rrdhost_init_machine_guid(host, guid);
+ rrdhost_init_os(host, os);
+ rrdhost_init_timezone(host, timezone);
+ rrdhost_init_tags(host, tags);
+
+ host->program_name = strdupz((program_name && *program_name)?program_name:"unknown");
+ host->program_version = strdupz((program_version && *program_version)?program_version:"unknown");
+ host->registry_hostname = strdupz((registry_hostname && *registry_hostname)?registry_hostname:hostname);
+
+ avl_init_lock(&(host->rrdset_root_index), rrdset_compare);
+ avl_init_lock(&(host->rrdset_root_index_name), rrdset_compare_name);
+ avl_init_lock(&(host->rrdfamily_root_index), rrdfamily_compare);
+ avl_init_lock(&(host->rrdvar_root_index), rrdvar_compare);
+
+ if(config_get_boolean(CONFIG_SECTION_GLOBAL, "delete obsolete charts files", 1))
+ rrdhost_flag_set(host, RRDHOST_FLAG_DELETE_OBSOLETE_CHARTS);
+
+ if(config_get_boolean(CONFIG_SECTION_GLOBAL, "delete orphan hosts files", 1) && !is_localhost)
+ rrdhost_flag_set(host, RRDHOST_FLAG_DELETE_ORPHAN_HOST);
+
+
+ // ------------------------------------------------------------------------
+ // initialize health variables
+
+ host->health_log.next_log_id = 1;
+ host->health_log.next_alarm_id = 1;
+ host->health_log.max = 1000;
+ host->health_log.next_log_id =
+ host->health_log.next_alarm_id = (uint32_t)now_realtime_sec();
+
+ long n = config_get_number(CONFIG_SECTION_HEALTH, "in memory max health log entries", host->health_log.max);
+ if(n < 10) {
+ error("Host '%s': health configuration has invalid max log entries %ld. Using default %u", host->hostname, n, host->health_log.max);
+ config_set_number(CONFIG_SECTION_HEALTH, "in memory max health log entries", (long)host->health_log.max);
+ }
+ else
+ host->health_log.max = (unsigned int)n;
+
+ netdata_rwlock_init(&host->health_log.alarm_log_rwlock);
+
+ char filename[FILENAME_MAX + 1];
+
+ if(is_localhost) {
+
+ host->cache_dir = strdupz(netdata_configured_cache_dir);
+ host->varlib_dir = strdupz(netdata_configured_varlib_dir);
+
+ }
+ else {
+ // this is not localhost - append our GUID to localhost path
+
+ snprintfz(filename, FILENAME_MAX, "%s/%s", netdata_configured_cache_dir, host->machine_guid);
+ host->cache_dir = strdupz(filename);
+
+ if(host->rrd_memory_mode == RRD_MEMORY_MODE_MAP || host->rrd_memory_mode == RRD_MEMORY_MODE_SAVE) {
+ int r = mkdir(host->cache_dir, 0775);
+ if(r != 0 && errno != EEXIST)
+ error("Host '%s': cannot create directory '%s'", host->hostname, host->cache_dir);
+ }
+
+ snprintfz(filename, FILENAME_MAX, "%s/%s", netdata_configured_varlib_dir, host->machine_guid);
+ host->varlib_dir = strdupz(filename);
+
+ if(host->health_enabled) {
+ int r = mkdir(host->varlib_dir, 0775);
+ if(r != 0 && errno != EEXIST)
+ error("Host '%s': cannot create directory '%s'", host->hostname, host->varlib_dir);
+ }
+
+ }
+
+ if(host->health_enabled) {
+ snprintfz(filename, FILENAME_MAX, "%s/health", host->varlib_dir);
+ int r = mkdir(filename, 0775);
+ if(r != 0 && errno != EEXIST)
+ error("Host '%s': cannot create directory '%s'", host->hostname, filename);
+ }
+
+ snprintfz(filename, FILENAME_MAX, "%s/health/health-log.db", host->varlib_dir);
+ host->health_log_filename = strdupz(filename);
+
+ snprintfz(filename, FILENAME_MAX, "%s/alarm-notify.sh", netdata_configured_plugins_dir);
+ host->health_default_exec = strdupz(config_get(CONFIG_SECTION_HEALTH, "script to execute on alarm", filename));
+ host->health_default_recipient = strdupz("root");
+
+
+ // ------------------------------------------------------------------------
+ // load health configuration
+
+ if(host->health_enabled) {
+ health_alarm_log_load(host);
+ health_alarm_log_open(host);
+
+ rrdhost_wrlock(host);
+ health_readdir(host, health_user_config_dir(), health_stock_config_dir(), NULL);
+ rrdhost_unlock(host);
+ }
+
+
+ // ------------------------------------------------------------------------
+ // link it and add it to the index
+
+ if(is_localhost) {
+ host->next = localhost;
+ localhost = host;
+ }
+ else {
+ if(localhost) {
+ host->next = localhost->next;
+ localhost->next = host;
+ }
+ else localhost = host;
+ }
+
+ RRDHOST *t = rrdhost_index_add(host);
+
+ if(t != host) {
+ error("Host '%s': cannot add host with machine guid '%s' to index. It already exists as host '%s' with machine guid '%s'.", host->hostname, host->machine_guid, t->hostname, t->machine_guid);
+ rrdhost_free(host);
+ host = NULL;
+ }
+ else {
+ info("Host '%s' (at registry as '%s') with guid '%s' initialized"
+ ", os '%s'"
+ ", timezone '%s'"
+ ", tags '%s'"
+ ", program_name '%s'"
+ ", program_version '%s'"
+ ", update every %d"
+ ", memory mode %s"
+ ", history entries %ld"
+ ", streaming %s"
+ " (to '%s' with api key '%s')"
+ ", health %s"
+ ", cache_dir '%s'"
+ ", varlib_dir '%s'"
+ ", health_log '%s'"
+ ", alarms default handler '%s'"
+ ", alarms default recipient '%s'"
+ , host->hostname
+ , host->registry_hostname
+ , host->machine_guid
+ , host->os
+ , host->timezone
+ , (host->tags)?host->tags:""
+ , host->program_name
+ , host->program_version
+ , host->rrd_update_every
+ , rrd_memory_mode_name(host->rrd_memory_mode)
+ , host->rrd_history_entries
+ , host->rrdpush_send_enabled?"enabled":"disabled"
+ , host->rrdpush_send_destination?host->rrdpush_send_destination:""
+ , host->rrdpush_send_api_key?host->rrdpush_send_api_key:""
+ , host->health_enabled?"enabled":"disabled"
+ , host->cache_dir
+ , host->varlib_dir
+ , host->health_log_filename
+ , host->health_default_exec
+ , host->health_default_recipient
+ );
+ }
+
+ rrd_hosts_available++;
+
+ return host;
+}
+
+RRDHOST *rrdhost_find_or_create(
+ const char *hostname
+ , const char *registry_hostname
+ , const char *guid
+ , const char *os
+ , const char *timezone
+ , const char *tags
+ , const char *program_name
+ , const char *program_version
+ , int update_every
+ , long history
+ , RRD_MEMORY_MODE mode
+ , unsigned int health_enabled
+ , unsigned int rrdpush_enabled
+ , char *rrdpush_destination
+ , char *rrdpush_api_key
+ , char *rrdpush_send_charts_matching
+) {
+ debug(D_RRDHOST, "Searching for host '%s' with guid '%s'", hostname, guid);
+
+ rrd_wrlock();
+ RRDHOST *host = rrdhost_find_by_guid(guid, 0);
+ if(!host) {
+ host = rrdhost_create(
+ hostname
+ , registry_hostname
+ , guid
+ , os
+ , timezone
+ , tags
+ , program_name
+ , program_version
+ , update_every
+ , history
+ , mode
+ , health_enabled
+ , rrdpush_enabled
+ , rrdpush_destination
+ , rrdpush_api_key
+ , rrdpush_send_charts_matching
+ , 0
+ );
+ }
+ else {
+ host->health_enabled = health_enabled;
+
+ if(strcmp(host->hostname, hostname) != 0) {
+ info("Host '%s' has been renamed to '%s'. If this is not intentional it may mean multiple hosts are using the same machine_guid.", host->hostname, hostname);
+ char *t = host->hostname;
+ host->hostname = strdupz(hostname);
+ host->hash_hostname = simple_hash(host->hostname);
+ freez(t);
+ }
+
+ if(strcmp(host->program_name, program_name) != 0) {
+ info("Host '%s' switched program name from '%s' to '%s'", host->hostname, host->program_name, program_name);
+ char *t = host->program_name;
+ host->program_name = strdupz(program_name);
+ freez(t);
+ }
+
+ if(strcmp(host->program_version, program_version) != 0) {
+ info("Host '%s' switched program version from '%s' to '%s'", host->hostname, host->program_version, program_version);
+ char *t = host->program_version;
+ host->program_version = strdupz(program_version);
+ freez(t);
+ }
+
+ if(host->rrd_update_every != update_every)
+ error("Host '%s' has an update frequency of %d seconds, but the wanted one is %d seconds. Restart netdata here to apply the new settings.", host->hostname, host->rrd_update_every, update_every);
+
+ if(host->rrd_history_entries < history)
+ error("Host '%s' has history of %ld entries, but the wanted one is %ld entries. Restart netdata here to apply the new settings.", host->hostname, host->rrd_history_entries, history);
+
+ if(host->rrd_memory_mode != mode)
+ error("Host '%s' has memory mode '%s', but the wanted one is '%s'. Restart netdata here to apply the new settings.", host->hostname, rrd_memory_mode_name(host->rrd_memory_mode), rrd_memory_mode_name(mode));
+
+ // update host tags
+ rrdhost_init_tags(host, tags);
+ }
+
+ rrdhost_cleanup_orphan_hosts_nolock(host);
+
+ rrd_unlock();
+
+ return host;
+}
+
+inline int rrdhost_should_be_removed(RRDHOST *host, RRDHOST *protected, time_t now) {
+ if(host != protected
+ && host != localhost
+ && rrdhost_flag_check(host, RRDHOST_FLAG_ORPHAN)
+ && !host->connected_senders
+ && host->senders_disconnected_time
+ && host->senders_disconnected_time + rrdhost_free_orphan_time < now)
+ return 1;
+
+ return 0;
+}
+
+void rrdhost_cleanup_orphan_hosts_nolock(RRDHOST *protected) {
+ time_t now = now_realtime_sec();
+
+ RRDHOST *host;
+
+restart_after_removal:
+ rrdhost_foreach_write(host) {
+ if(rrdhost_should_be_removed(host, protected, now)) {
+ info("Host '%s' with machine guid '%s' is obsolete - cleaning up.", host->hostname, host->machine_guid);
+
+ if(rrdhost_flag_check(host, RRDHOST_FLAG_DELETE_ORPHAN_HOST))
+ rrdhost_delete_charts(host);
+ else
+ rrdhost_save_charts(host);
+
+ rrdhost_free(host);
+ goto restart_after_removal;
+ }
+ }
+}
+
+// ----------------------------------------------------------------------------
+// RRDHOST global / startup initialization
+
+void rrd_init(char *hostname) {
+ rrdset_free_obsolete_time = config_get_number(CONFIG_SECTION_GLOBAL, "cleanup obsolete charts after seconds", rrdset_free_obsolete_time);
+ gap_when_lost_iterations_above = (int)config_get_number(CONFIG_SECTION_GLOBAL, "gap when lost iterations above", gap_when_lost_iterations_above);
+ if(gap_when_lost_iterations_above < 1)
+ gap_when_lost_iterations_above = 1;
+
+ health_init();
+ registry_init();
+ rrdpush_init();
+
+ debug(D_RRDHOST, "Initializing localhost with hostname '%s'", hostname);
+ rrd_wrlock();
+ localhost = rrdhost_create(
+ hostname
+ , registry_get_this_machine_hostname()
+ , registry_get_this_machine_guid()
+ , os_type
+ , netdata_configured_timezone
+ , config_get(CONFIG_SECTION_BACKEND, "host tags", "")
+ , program_name
+ , program_version
+ , default_rrd_update_every
+ , default_rrd_history_entries
+ , default_rrd_memory_mode
+ , default_health_enabled
+ , default_rrdpush_enabled
+ , default_rrdpush_destination
+ , default_rrdpush_api_key
+ , default_rrdpush_send_charts_matching
+ , 1
+ );
+ rrd_unlock();
+}
+
+// ----------------------------------------------------------------------------
+// RRDHOST - lock validations
+// there are only used when NETDATA_INTERNAL_CHECKS is set
+
+void __rrdhost_check_rdlock(RRDHOST *host, const char *file, const char *function, const unsigned long line) {
+ debug(D_RRDHOST, "Checking read lock on host '%s'", host->hostname);
+
+ int ret = netdata_rwlock_trywrlock(&host->rrdhost_rwlock);
+ if(ret == 0)
+ fatal("RRDHOST '%s' should be read-locked, but it is not, at function %s() at line %lu of file '%s'", host->hostname, function, line, file);
+}
+
+void __rrdhost_check_wrlock(RRDHOST *host, const char *file, const char *function, const unsigned long line) {
+ debug(D_RRDHOST, "Checking write lock on host '%s'", host->hostname);
+
+ int ret = netdata_rwlock_tryrdlock(&host->rrdhost_rwlock);
+ if(ret == 0)
+ fatal("RRDHOST '%s' should be write-locked, but it is not, at function %s() at line %lu of file '%s'", host->hostname, function, line, file);
+}
+
+void __rrd_check_rdlock(const char *file, const char *function, const unsigned long line) {
+ debug(D_RRDHOST, "Checking read lock on all RRDs");
+
+ int ret = netdata_rwlock_trywrlock(&rrd_rwlock);
+ if(ret == 0)
+ fatal("RRDs should be read-locked, but it are not, at function %s() at line %lu of file '%s'", function, line, file);
+}
+
+void __rrd_check_wrlock(const char *file, const char *function, const unsigned long line) {
+ debug(D_RRDHOST, "Checking write lock on all RRDs");
+
+ int ret = netdata_rwlock_tryrdlock(&rrd_rwlock);
+ if(ret == 0)
+ fatal("RRDs should be write-locked, but it are not, at function %s() at line %lu of file '%s'", function, line, file);
+}
+
+// ----------------------------------------------------------------------------
+// RRDHOST - free
+
+void rrdhost_free(RRDHOST *host) {
+ if(!host) return;
+
+ info("Freeing all memory for host '%s'...", host->hostname);
+
+ rrd_check_wrlock(); // make sure the RRDs are write locked
+
+ // stop a possibly running thread
+ rrdpush_sender_thread_stop(host);
+
+ rrdhost_wrlock(host); // lock this RRDHOST
+
+ // ------------------------------------------------------------------------
+ // release its children resources
+
+ while(host->rrdset_root)
+ rrdset_free(host->rrdset_root);
+
+ while(host->alarms)
+ rrdcalc_unlink_and_free(host, host->alarms);
+
+ while(host->templates)
+ rrdcalctemplate_unlink_and_free(host, host->templates);
+
+ debug(D_RRD_CALLS, "RRDHOST: Cleaning up remaining host variables for host '%s'", host->hostname);
+ rrdvar_free_remaining_variables(host, &host->rrdvar_root_index);
+
+ health_alarm_log_free(host);
+
+ // ------------------------------------------------------------------------
+ // remove it from the indexes
+
+ if(rrdhost_index_del(host) != host)
+ error("RRDHOST '%s' removed from index, deleted the wrong entry.", host->hostname);
+
+
+ // ------------------------------------------------------------------------
+ // unlink it from the host
+
+ if(host == localhost) {
+ localhost = host->next;
+ }
+ else {
+ // find the previous one
+ RRDHOST *h;
+ for(h = localhost; h && h->next != host ; h = h->next) ;
+
+ // bypass it
+ if(h) h->next = host->next;
+ else error("Request to free RRDHOST '%s': cannot find it", host->hostname);
+ }
+
+ // ------------------------------------------------------------------------
+ // free it
+
+ freez((void *)host->tags);
+ freez((void *)host->os);
+ freez((void *)host->timezone);
+ freez(host->program_version);
+ freez(host->program_name);
+ freez(host->cache_dir);
+ freez(host->varlib_dir);
+ freez(host->rrdpush_send_api_key);
+ freez(host->rrdpush_send_destination);
+ freez(host->health_default_exec);
+ freez(host->health_default_recipient);
+ freez(host->health_log_filename);
+ freez(host->hostname);
+ freez(host->registry_hostname);
+ simple_pattern_free(host->rrdpush_send_charts_matching);
+ rrdhost_unlock(host);
+ netdata_rwlock_destroy(&host->health_log.alarm_log_rwlock);
+ netdata_rwlock_destroy(&host->rrdhost_rwlock);
+ freez(host);
+
+ rrd_hosts_available--;
+}
+
+void rrdhost_free_all(void) {
+ rrd_wrlock();
+ while(localhost) rrdhost_free(localhost);
+ rrd_unlock();
+}
+
+// ----------------------------------------------------------------------------
+// RRDHOST - save host files
+
+void rrdhost_save_charts(RRDHOST *host) {
+ if(!host) return;
+
+ info("Saving/Closing database of host '%s'...", host->hostname);
+
+ RRDSET *st;
+
+ // we get a write lock
+ // to ensure only one thread is saving the database
+ rrdhost_wrlock(host);
+
+ rrdset_foreach_write(st, host) {
+ rrdset_rdlock(st);
+ rrdset_save(st);
+ rrdset_unlock(st);
+ }
+
+ rrdhost_unlock(host);
+}
+
+// ----------------------------------------------------------------------------
+// RRDHOST - delete host files
+
+void rrdhost_delete_charts(RRDHOST *host) {
+ if(!host) return;
+
+ info("Deleting database of host '%s'...", host->hostname);
+
+ RRDSET *st;
+
+ // we get a write lock
+ // to ensure only one thread is saving the database
+ rrdhost_wrlock(host);
+
+ rrdset_foreach_write(st, host) {
+ rrdset_rdlock(st);
+ rrdset_delete(st);
+ rrdset_unlock(st);
+ }
+
+ recursively_delete_dir(host->cache_dir, "left over host");
+
+ rrdhost_unlock(host);
+}
+
+// ----------------------------------------------------------------------------
+// RRDHOST - cleanup host files
+
+void rrdhost_cleanup_charts(RRDHOST *host) {
+ if(!host) return;
+
+ info("Cleaning up database of host '%s'...", host->hostname);
+
+ RRDSET *st;
+ uint32_t rrdhost_delete_obsolete_charts = rrdhost_flag_check(host, RRDHOST_FLAG_DELETE_OBSOLETE_CHARTS);
+
+ // we get a write lock
+ // to ensure only one thread is saving the database
+ rrdhost_wrlock(host);
+
+ rrdset_foreach_write(st, host) {
+ rrdset_rdlock(st);
+
+ if(rrdhost_delete_obsolete_charts && rrdset_flag_check(st, RRDSET_FLAG_OBSOLETE))
+ rrdset_delete(st);
+ else
+ rrdset_save(st);
+
+ rrdset_unlock(st);
+ }
+
+ rrdhost_unlock(host);
+}
+
+
+// ----------------------------------------------------------------------------
+// RRDHOST - save all hosts to disk
+
+void rrdhost_save_all(void) {
+ info("Saving database [%zu hosts(s)]...", rrd_hosts_available);
+
+ rrd_rdlock();
+
+ RRDHOST *host;
+ rrdhost_foreach_read(host)
+ rrdhost_save_charts(host);
+
+ rrd_unlock();
+}
+
+// ----------------------------------------------------------------------------
+// RRDHOST - save or delete all hosts from disk
+
+void rrdhost_cleanup_all(void) {
+ info("Cleaning up database [%zu hosts(s)]...", rrd_hosts_available);
+
+ rrd_rdlock();
+
+ RRDHOST *host;
+ rrdhost_foreach_read(host) {
+ if(host != localhost && rrdhost_flag_check(host, RRDHOST_FLAG_DELETE_OBSOLETE_CHARTS) && !host->connected_senders)
+ rrdhost_delete_charts(host);
+ else
+ rrdhost_cleanup_charts(host);
+ }
+
+ rrd_unlock();
+}
+
+
+// ----------------------------------------------------------------------------
+// RRDHOST - save or delete all the host charts from disk
+
+void rrdhost_cleanup_obsolete_charts(RRDHOST *host) {
+ time_t now = now_realtime_sec();
+
+ RRDSET *st;
+
+ uint32_t rrdhost_delete_obsolete_charts = rrdhost_flag_check(host, RRDHOST_FLAG_DELETE_OBSOLETE_CHARTS);
+
+restart_after_removal:
+ rrdset_foreach_write(st, host) {
+ if(unlikely(rrdset_flag_check(st, RRDSET_FLAG_OBSOLETE)
+ && st->last_accessed_time + rrdset_free_obsolete_time < now
+ && st->last_updated.tv_sec + rrdset_free_obsolete_time < now
+ && st->last_collected_time.tv_sec + rrdset_free_obsolete_time < now
+ )) {
+
+ rrdset_rdlock(st);
+
+ if(rrdhost_delete_obsolete_charts)
+ rrdset_delete(st);
+ else
+ rrdset_save(st);
+
+ rrdset_unlock(st);
+
+ rrdset_free(st);
+ goto restart_after_removal;
+ }
+ }
+}