diff options
Diffstat (limited to '')
| -rw-r--r-- | collectors/cgroups.plugin/cgroup-discovery.c | 1245 |
1 files changed, 1245 insertions, 0 deletions
diff --git a/collectors/cgroups.plugin/cgroup-discovery.c b/collectors/cgroups.plugin/cgroup-discovery.c new file mode 100644 index 000000000..ede35ed8a --- /dev/null +++ b/collectors/cgroups.plugin/cgroup-discovery.c @@ -0,0 +1,1245 @@ +// SPDX-License-Identifier: GPL-3.0-or-later + +#include "cgroup-internals.h" + +// discovery cgroup thread worker jobs +#define WORKER_DISCOVERY_INIT 0 +#define WORKER_DISCOVERY_FIND 1 +#define WORKER_DISCOVERY_PROCESS 2 +#define WORKER_DISCOVERY_PROCESS_RENAME 3 +#define WORKER_DISCOVERY_PROCESS_NETWORK 4 +#define WORKER_DISCOVERY_PROCESS_FIRST_TIME 5 +#define WORKER_DISCOVERY_UPDATE 6 +#define WORKER_DISCOVERY_CLEANUP 7 +#define WORKER_DISCOVERY_COPY 8 +#define WORKER_DISCOVERY_SHARE 9 +#define WORKER_DISCOVERY_LOCK 10 + +#if WORKER_UTILIZATION_MAX_JOB_TYPES < 11 +#error WORKER_UTILIZATION_MAX_JOB_TYPES has to be at least 11 +#endif + +struct cgroup *discovered_cgroup_root = NULL; + +char cgroup_chart_id_prefix[] = "cgroup_"; +char services_chart_id_prefix[] = "systemd_"; +char *cgroups_rename_script = NULL; + + +// ---------------------------------------------------------------------------- + +static inline void free_pressure(struct pressure *res) { + if (res->some.share_time.st) rrdset_is_obsolete___safe_from_collector_thread(res->some.share_time.st); + if (res->some.total_time.st) rrdset_is_obsolete___safe_from_collector_thread(res->some.total_time.st); + if (res->full.share_time.st) rrdset_is_obsolete___safe_from_collector_thread(res->full.share_time.st); + if (res->full.total_time.st) rrdset_is_obsolete___safe_from_collector_thread(res->full.total_time.st); + freez(res->filename); +} + +static inline void cgroup_free_network_interfaces(struct cgroup *cg) { + while(cg->interfaces) { + struct cgroup_network_interface *i = cg->interfaces; + cg->interfaces = i->next; + + // delete the registration of proc_net_dev rename + netdev_rename_device_del(i->host_device); + + freez((void *)i->host_device); + freez((void *)i->container_device); + freez((void *)i); + } +} + +static inline void cgroup_free(struct cgroup *cg) { + netdata_log_debug(D_CGROUP, "Removing cgroup '%s' with chart id '%s' (was %s and %s)", cg->id, cg->chart_id, (cg->enabled)?"enabled":"disabled", (cg->available)?"available":"not available"); + + cgroup_netdev_delete(cg); + + if(cg->st_cpu) rrdset_is_obsolete___safe_from_collector_thread(cg->st_cpu); + if(cg->st_cpu_limit) rrdset_is_obsolete___safe_from_collector_thread(cg->st_cpu_limit); + if(cg->st_cpu_per_core) rrdset_is_obsolete___safe_from_collector_thread(cg->st_cpu_per_core); + if(cg->st_cpu_nr_throttled) rrdset_is_obsolete___safe_from_collector_thread(cg->st_cpu_nr_throttled); + if(cg->st_cpu_throttled_time) rrdset_is_obsolete___safe_from_collector_thread(cg->st_cpu_throttled_time); + if(cg->st_cpu_shares) rrdset_is_obsolete___safe_from_collector_thread(cg->st_cpu_shares); + if(cg->st_mem) rrdset_is_obsolete___safe_from_collector_thread(cg->st_mem); + if(cg->st_writeback) rrdset_is_obsolete___safe_from_collector_thread(cg->st_writeback); + if(cg->st_mem_activity) rrdset_is_obsolete___safe_from_collector_thread(cg->st_mem_activity); + if(cg->st_pgfaults) rrdset_is_obsolete___safe_from_collector_thread(cg->st_pgfaults); + if(cg->st_mem_usage) rrdset_is_obsolete___safe_from_collector_thread(cg->st_mem_usage); + if(cg->st_mem_usage_limit) rrdset_is_obsolete___safe_from_collector_thread(cg->st_mem_usage_limit); + if(cg->st_mem_utilization) rrdset_is_obsolete___safe_from_collector_thread(cg->st_mem_utilization); + if(cg->st_mem_failcnt) rrdset_is_obsolete___safe_from_collector_thread(cg->st_mem_failcnt); + if(cg->st_io) rrdset_is_obsolete___safe_from_collector_thread(cg->st_io); + if(cg->st_serviced_ops) rrdset_is_obsolete___safe_from_collector_thread(cg->st_serviced_ops); + if(cg->st_throttle_io) rrdset_is_obsolete___safe_from_collector_thread(cg->st_throttle_io); + if(cg->st_throttle_serviced_ops) rrdset_is_obsolete___safe_from_collector_thread(cg->st_throttle_serviced_ops); + if(cg->st_queued_ops) rrdset_is_obsolete___safe_from_collector_thread(cg->st_queued_ops); + if(cg->st_merged_ops) rrdset_is_obsolete___safe_from_collector_thread(cg->st_merged_ops); + if(cg->st_pids) rrdset_is_obsolete___safe_from_collector_thread(cg->st_pids); + + freez(cg->filename_cpuset_cpus); + freez(cg->filename_cpu_cfs_period); + freez(cg->filename_cpu_cfs_quota); + freez(cg->filename_memory_limit); + freez(cg->filename_memoryswap_limit); + + cgroup_free_network_interfaces(cg); + + freez(cg->cpuacct_usage.cpu_percpu); + + freez(cg->cpuacct_stat.filename); + freez(cg->cpuacct_usage.filename); + freez(cg->cpuacct_cpu_throttling.filename); + freez(cg->cpuacct_cpu_shares.filename); + + arl_free(cg->memory.arl_base); + freez(cg->memory.filename_detailed); + freez(cg->memory.filename_failcnt); + freez(cg->memory.filename_usage_in_bytes); + freez(cg->memory.filename_msw_usage_in_bytes); + + freez(cg->io_service_bytes.filename); + freez(cg->io_serviced.filename); + + freez(cg->throttle_io_service_bytes.filename); + freez(cg->throttle_io_serviced.filename); + + freez(cg->io_merged.filename); + freez(cg->io_queued.filename); + freez(cg->pids.pids_current_filename); + + free_pressure(&cg->cpu_pressure); + free_pressure(&cg->io_pressure); + free_pressure(&cg->memory_pressure); + free_pressure(&cg->irq_pressure); + + freez(cg->id); + freez(cg->intermediate_id); + freez(cg->chart_id); + freez(cg->name); + + rrdlabels_destroy(cg->chart_labels); + + freez(cg); + + cgroup_root_count--; +} + +// ---------------------------------------------------------------------------- +// add/remove/find cgroup objects + +#define CGROUP_CHARTID_LINE_MAX 1024 + +static inline char *cgroup_chart_id_strdupz(const char *s) { + if(!s || !*s) s = "/"; + + if(*s == '/' && s[1] != '\0') s++; + + char *r = strdupz(s); + netdata_fix_chart_id(r); + + return r; +} + +// TODO: move the code to cgroup_chart_id_strdupz() when the renaming script is fixed +static inline void substitute_dots_in_id(char *s) { + // dots are used to distinguish chart type and id in streaming, so we should replace them + for (char *d = s; *d; d++) { + if (*d == '.') + *d = '-'; + } +} + +// ---------------------------------------------------------------------------- +// parse k8s labels + +char *cgroup_parse_resolved_name_and_labels(RRDLABELS *labels, char *data) { + // the first word, up to the first space is the name + char *name = strsep_skip_consecutive_separators(&data, " "); + + // the rest are key=value pairs separated by comma + while(data) { + char *pair = strsep_skip_consecutive_separators(&data, ","); + rrdlabels_add_pair(labels, pair, RRDLABEL_SRC_AUTO | RRDLABEL_SRC_K8S); + } + + return name; +} + +static inline void discovery_rename_cgroup(struct cgroup *cg) { + if (!cg->pending_renames) { + return; + } + cg->pending_renames--; + + netdata_log_debug(D_CGROUP, "looking for the name of cgroup '%s' with chart id '%s'", cg->id, cg->chart_id); + netdata_log_debug(D_CGROUP, "executing command %s \"%s\" for cgroup '%s'", cgroups_rename_script, cg->intermediate_id, cg->chart_id); + pid_t cgroup_pid; + + FILE *fp_child_input, *fp_child_output; + (void)netdata_popen_raw_default_flags_and_environment(&cgroup_pid, &fp_child_input, &fp_child_output, cgroups_rename_script, cg->id, cg->intermediate_id); + if (!fp_child_output) { + collector_error("CGROUP: cannot popen(%s \"%s\", \"r\").", cgroups_rename_script, cg->intermediate_id); + cg->pending_renames = 0; + cg->processed = 1; + return; + } + + char buffer[CGROUP_CHARTID_LINE_MAX + 1]; + char *new_name = fgets(buffer, CGROUP_CHARTID_LINE_MAX, fp_child_output); + int exit_code = netdata_pclose(fp_child_input, fp_child_output, cgroup_pid); + + switch (exit_code) { + case 0: + cg->pending_renames = 0; + break; + + case 3: + cg->pending_renames = 0; + cg->processed = 1; + break; + + default: + break; + } + + if (cg->pending_renames || cg->processed) + return; + if (!new_name || !*new_name || *new_name == '\n') + return; + if (!(new_name = trim(new_name))) + return; + + if (!cg->chart_labels) + cg->chart_labels = rrdlabels_create(); + // read the new labels and remove the obsolete ones + rrdlabels_unmark_all(cg->chart_labels); + char *name = cgroup_parse_resolved_name_and_labels(cg->chart_labels, new_name); + rrdlabels_remove_all_unmarked(cg->chart_labels); + + freez(cg->name); + cg->name = strdupz(name); + + freez(cg->chart_id); + cg->chart_id = cgroup_chart_id_strdupz(name); + + substitute_dots_in_id(cg->chart_id); + cg->hash_chart_id = simple_hash(cg->chart_id); +} + +static void is_cgroup_procs_exist(netdata_ebpf_cgroup_shm_body_t *out, char *id) { + struct stat buf; + + snprintfz(out->path, FILENAME_MAX, "%s%s/cgroup.procs", cgroup_cpuset_base, id); + if (likely(stat(out->path, &buf) == 0)) { + return; + } + + snprintfz(out->path, FILENAME_MAX, "%s%s/cgroup.procs", cgroup_blkio_base, id); + if (likely(stat(out->path, &buf) == 0)) { + return; + } + + snprintfz(out->path, FILENAME_MAX, "%s%s/cgroup.procs", cgroup_memory_base, id); + if (likely(stat(out->path, &buf) == 0)) { + return; + } + + snprintfz(out->path, FILENAME_MAX, "%s%s/cgroup.procs", cgroup_devices_base, id); + if (likely(stat(out->path, &buf) == 0)) { + return; + } + + out->path[0] = '\0'; + out->enabled = 0; +} + +static inline void convert_cgroup_to_systemd_service(struct cgroup *cg) { + char buffer[CGROUP_CHARTID_LINE_MAX + 1]; + cg->options |= CGROUP_OPTIONS_SYSTEM_SLICE_SERVICE; + strncpyz(buffer, cg->id, CGROUP_CHARTID_LINE_MAX); + char *s = buffer; + + // skip to the last slash + size_t len = strlen(s); + while (len--) { + if (unlikely(s[len] == '/')) { + break; + } + } + if (len) { + s = &s[len + 1]; + } + + // remove extension + len = strlen(s); + while (len--) { + if (unlikely(s[len] == '.')) { + break; + } + } + if (len) { + s[len] = '\0'; + } + + freez(cg->name); + cg->name = strdupz(s); + + freez(cg->chart_id); + cg->chart_id = cgroup_chart_id_strdupz(s); + substitute_dots_in_id(cg->chart_id); + cg->hash_chart_id = simple_hash(cg->chart_id); +} + +static inline struct cgroup *discovery_cgroup_add(const char *id) { + netdata_log_debug(D_CGROUP, "adding to list, cgroup with id '%s'", id); + + struct cgroup *cg = callocz(1, sizeof(struct cgroup)); + + cg->id = strdupz(id); + cg->hash = simple_hash(cg->id); + + cg->name = strdupz(id); + + cg->intermediate_id = cgroup_chart_id_strdupz(id); + + cg->chart_id = cgroup_chart_id_strdupz(id); + substitute_dots_in_id(cg->chart_id); + cg->hash_chart_id = simple_hash(cg->chart_id); + + if (cgroup_use_unified_cgroups) { + cg->options |= CGROUP_OPTIONS_IS_UNIFIED; + } + + if (!discovered_cgroup_root) + discovered_cgroup_root = cg; + else { + struct cgroup *t; + for (t = discovered_cgroup_root; t->discovered_next; t = t->discovered_next) { + } + t->discovered_next = cg; + } + + return cg; +} + +static inline struct cgroup *discovery_cgroup_find(const char *id) { + netdata_log_debug(D_CGROUP, "searching for cgroup '%s'", id); + + uint32_t hash = simple_hash(id); + + struct cgroup *cg; + for(cg = discovered_cgroup_root; cg ; cg = cg->discovered_next) { + if(hash == cg->hash && strcmp(id, cg->id) == 0) + break; + } + + netdata_log_debug(D_CGROUP, "cgroup '%s' %s in memory", id, (cg)?"found":"not found"); + return cg; +} + +static int calc_cgroup_depth(const char *id) { + int depth = 0; + const char *s; + for (s = id; *s; s++) { + depth += unlikely(*s == '/'); + } + return depth; +} + +static inline void discovery_find_cgroup_in_dir_callback(const char *dir) { + if (!dir || !*dir) { + dir = "/"; + } + + netdata_log_debug(D_CGROUP, "examining cgroup dir '%s'", dir); + + struct cgroup *cg = discovery_cgroup_find(dir); + if (cg) { + cg->available = 1; + return; + } + + if (cgroup_root_count >= cgroup_root_max) { + nd_log_limit_static_global_var(erl, 3600, 0); + nd_log_limit(&erl, NDLS_COLLECTORS, NDLP_WARNING, "CGROUP: maximum number of cgroups reached (%d). No more cgroups will be added.", cgroup_root_count); + return; + } + + if (cgroup_max_depth > 0) { + int depth = calc_cgroup_depth(dir); + if (depth > cgroup_max_depth) { + nd_log_collector(NDLP_DEBUG, "CGROUP: '%s' is too deep (%d, while max is %d)", dir, depth, cgroup_max_depth); + return; + } + } + + cg = discovery_cgroup_add(dir); + cg->available = 1; + cg->first_time_seen = 1; + cg->function_ready = false; + cgroup_root_count++; +} + +static inline int discovery_find_dir_in_subdirs(const char *base, const char *this, void (*callback)(const char *)) { + if(!this) this = base; + netdata_log_debug(D_CGROUP, "searching for directories in '%s' (base '%s')", this?this:"", base); + + size_t dirlen = strlen(this), baselen = strlen(base); + + int ret = -1; + int enabled = -1; + + const char *relative_path = &this[baselen]; + if(!*relative_path) relative_path = "/"; + + DIR *dir = opendir(this); + if(!dir) { + collector_error("CGROUP: cannot read directory '%s'", base); + return ret; + } + ret = 1; + + callback(relative_path); + + struct dirent *de = NULL; + while((de = readdir(dir))) { + if(de->d_type == DT_DIR + && ( + (de->d_name[0] == '.' && de->d_name[1] == '\0') + || (de->d_name[0] == '.' && de->d_name[1] == '.' && de->d_name[2] == '\0') + )) + continue; + + if(de->d_type == DT_DIR) { + if(enabled == -1) { + const char *r = relative_path; + if(*r == '\0') r = "/"; + + // do not decent in directories we are not interested + enabled = matches_search_cgroup_paths(r); + } + + if(enabled) { + char *s = mallocz(dirlen + strlen(de->d_name) + 2); + strcpy(s, this); + strcat(s, "/"); + strcat(s, de->d_name); + int ret2 = discovery_find_dir_in_subdirs(base, s, callback); + if(ret2 > 0) ret += ret2; + freez(s); + } + } + } + + closedir(dir); + return ret; +} + +static inline void discovery_mark_as_unavailable_all_cgroups() { + for (struct cgroup *cg = discovered_cgroup_root; cg; cg = cg->discovered_next) { + cg->available = 0; + } +} + +static inline void discovery_update_filenames_cgroup_v1(struct cgroup *cg) { + char filename[FILENAME_MAX + 1]; + struct stat buf; + + // CPU + if (unlikely(cgroup_enable_cpuacct_stat && !cg->cpuacct_stat.filename)) { + snprintfz(filename, FILENAME_MAX, "%s%s/cpuacct.stat", cgroup_cpuacct_base, cg->id); + if (likely(stat(filename, &buf) != -1)) { + cg->cpuacct_stat.filename = strdupz(filename); + cg->cpuacct_stat.enabled = cgroup_enable_cpuacct_stat; + snprintfz(filename, FILENAME_MAX, "%s%s/cpuset.cpus", cgroup_cpuset_base, cg->id); + cg->filename_cpuset_cpus = strdupz(filename); + snprintfz(filename, FILENAME_MAX, "%s%s/cpu.cfs_period_us", cgroup_cpuacct_base, cg->id); + cg->filename_cpu_cfs_period = strdupz(filename); + snprintfz(filename, FILENAME_MAX, "%s%s/cpu.cfs_quota_us", cgroup_cpuacct_base, cg->id); + cg->filename_cpu_cfs_quota = strdupz(filename); + } + } + // FIXME: remove usage_percpu + if (unlikely(cgroup_enable_cpuacct_usage && !cg->cpuacct_usage.filename && !is_cgroup_systemd_service(cg))) { + snprintfz(filename, FILENAME_MAX, "%s%s/cpuacct.usage_percpu", cgroup_cpuacct_base, cg->id); + if (likely(stat(filename, &buf) != -1)) { + cg->cpuacct_usage.filename = strdupz(filename); + cg->cpuacct_usage.enabled = cgroup_enable_cpuacct_usage; + } + } + if (unlikely( + cgroup_enable_cpuacct_cpu_throttling && !cg->cpuacct_cpu_throttling.filename && + !is_cgroup_systemd_service(cg))) { + snprintfz(filename, FILENAME_MAX, "%s%s/cpu.stat", cgroup_cpuacct_base, cg->id); + if (likely(stat(filename, &buf) != -1)) { + cg->cpuacct_cpu_throttling.filename = strdupz(filename); + cg->cpuacct_cpu_throttling.enabled = cgroup_enable_cpuacct_cpu_throttling; + } + } + if (unlikely( + cgroup_enable_cpuacct_cpu_shares && !cg->cpuacct_cpu_shares.filename && !is_cgroup_systemd_service(cg))) { + snprintfz(filename, FILENAME_MAX, "%s%s/cpu.shares", cgroup_cpuacct_base, cg->id); + if (likely(stat(filename, &buf) != -1)) { + cg->cpuacct_cpu_shares.filename = strdupz(filename); + cg->cpuacct_cpu_shares.enabled = cgroup_enable_cpuacct_cpu_shares; + } + } + + // Memory + if (unlikely( + (cgroup_enable_detailed_memory || cgroup_used_memory) && !cg->memory.filename_detailed && + (cgroup_used_memory || cgroup_enable_systemd_services_detailed_memory || !is_cgroup_systemd_service(cg)))) { + snprintfz(filename, FILENAME_MAX, "%s%s/memory.stat", cgroup_memory_base, cg->id); + if (likely(stat(filename, &buf) != -1)) { + cg->memory.filename_detailed = strdupz(filename); + cg->memory.enabled_detailed = + (cgroup_enable_detailed_memory == CONFIG_BOOLEAN_YES) ? CONFIG_BOOLEAN_YES : CONFIG_BOOLEAN_AUTO; + } + } + if (unlikely(cgroup_enable_memory && !cg->memory.filename_usage_in_bytes)) { + snprintfz(filename, FILENAME_MAX, "%s%s/memory.usage_in_bytes", cgroup_memory_base, cg->id); + if (likely(stat(filename, &buf) != -1)) { + cg->memory.filename_usage_in_bytes = strdupz(filename); + cg->memory.enabled_usage_in_bytes = cgroup_enable_memory; + snprintfz(filename, FILENAME_MAX, "%s%s/memory.limit_in_bytes", cgroup_memory_base, cg->id); + cg->filename_memory_limit = strdupz(filename); + } + } + if (unlikely(cgroup_enable_swap && !cg->memory.filename_msw_usage_in_bytes)) { + snprintfz(filename, FILENAME_MAX, "%s%s/memory.memsw.usage_in_bytes", cgroup_memory_base, cg->id); + if (likely(stat(filename, &buf) != -1)) { + cg->memory.filename_msw_usage_in_bytes = strdupz(filename); + cg->memory.enabled_msw_usage_in_bytes = cgroup_enable_swap; + snprintfz(filename, FILENAME_MAX, "%s%s/memory.memsw.limit_in_bytes", cgroup_memory_base, cg->id); + cg->filename_memoryswap_limit = strdupz(filename); + } + } + if (unlikely(cgroup_enable_memory_failcnt && !cg->memory.filename_failcnt)) { + snprintfz(filename, FILENAME_MAX, "%s%s/memory.failcnt", cgroup_memory_base, cg->id); + if (likely(stat(filename, &buf) != -1)) { + cg->memory.filename_failcnt = strdupz(filename); + cg->memory.enabled_failcnt = cgroup_enable_memory_failcnt; + } + } + + // Blkio + if (unlikely(cgroup_enable_blkio_io && !cg->io_service_bytes.filename)) { + snprintfz(filename, FILENAME_MAX, "%s%s/blkio.io_service_bytes_recursive", cgroup_blkio_base, cg->id); + if (unlikely(stat(filename, &buf) != -1)) { + cg->io_service_bytes.filename = strdupz(filename); + cg->io_service_bytes.enabled = cgroup_enable_blkio_io; + } else { + snprintfz(filename, FILENAME_MAX, "%s%s/blkio.io_service_bytes", cgroup_blkio_base, cg->id); + if (likely(stat(filename, &buf) != -1)) { + cg->io_service_bytes.filename = strdupz(filename); + cg->io_service_bytes.enabled = cgroup_enable_blkio_io; + } + } + } + if (unlikely(cgroup_enable_blkio_ops && !cg->io_serviced.filename)) { + snprintfz(filename, FILENAME_MAX, "%s%s/blkio.io_serviced_recursive", cgroup_blkio_base, cg->id); + if (unlikely(stat(filename, &buf) != -1)) { + cg->io_serviced.filename = strdupz(filename); + cg->io_serviced.enabled = cgroup_enable_blkio_ops; + } else { + snprintfz(filename, FILENAME_MAX, "%s%s/blkio.io_serviced", cgroup_blkio_base, cg->id); + if (likely(stat(filename, &buf) != -1)) { + cg->io_serviced.filename = strdupz(filename); + cg->io_serviced.enabled = cgroup_enable_blkio_ops; + } + } + } + if (unlikely(cgroup_enable_blkio_throttle_io && !cg->throttle_io_service_bytes.filename)) { + snprintfz(filename, FILENAME_MAX, "%s%s/blkio.throttle.io_service_bytes_recursive", cgroup_blkio_base, cg->id); + if (unlikely(stat(filename, &buf) != -1)) { + cg->throttle_io_service_bytes.filename = strdupz(filename); + cg->throttle_io_service_bytes.enabled = cgroup_enable_blkio_throttle_io; + } else { + snprintfz(filename, FILENAME_MAX, "%s%s/blkio.throttle.io_service_bytes", cgroup_blkio_base, cg->id); + if (likely(stat(filename, &buf) != -1)) { + cg->throttle_io_service_bytes.filename = strdupz(filename); + cg->throttle_io_service_bytes.enabled = cgroup_enable_blkio_throttle_io; + } + } + } + if (unlikely(cgroup_enable_blkio_throttle_ops && !cg->throttle_io_serviced.filename)) { + snprintfz(filename, FILENAME_MAX, "%s%s/blkio.throttle.io_serviced_recursive", cgroup_blkio_base, cg->id); + if (unlikely(stat(filename, &buf) != -1)) { + cg->throttle_io_serviced.filename = strdupz(filename); + cg->throttle_io_serviced.enabled = cgroup_enable_blkio_throttle_ops; + } else { + snprintfz(filename, FILENAME_MAX, "%s%s/blkio.throttle.io_serviced", cgroup_blkio_base, cg->id); + if (likely(stat(filename, &buf) != -1)) { + cg->throttle_io_serviced.filename = strdupz(filename); + cg->throttle_io_serviced.enabled = cgroup_enable_blkio_throttle_ops; + } + } + } + if (unlikely(cgroup_enable_blkio_merged_ops && !cg->io_merged.filename)) { + snprintfz(filename, FILENAME_MAX, "%s%s/blkio.io_merged_recursive", cgroup_blkio_base, cg->id); + if (unlikely(stat(filename, &buf) != -1)) { + cg->io_merged.filename = strdupz(filename); + cg->io_merged.enabled = cgroup_enable_blkio_merged_ops; + } else { + snprintfz(filename, FILENAME_MAX, "%s%s/blkio.io_merged", cgroup_blkio_base, cg->id); + if (likely(stat(filename, &buf) != -1)) { + cg->io_merged.filename = strdupz(filename); + cg->io_merged.enabled = cgroup_enable_blkio_merged_ops; + } + } + } + if (unlikely(cgroup_enable_blkio_queued_ops && !cg->io_queued.filename)) { + snprintfz(filename, FILENAME_MAX, "%s%s/blkio.io_queued_recursive", cgroup_blkio_base, cg->id); + if (unlikely(stat(filename, &buf) != -1)) { + cg->io_queued.filename = strdupz(filename); + cg->io_queued.enabled = cgroup_enable_blkio_queued_ops; + } else { + snprintfz(filename, FILENAME_MAX, "%s%s/blkio.io_queued", cgroup_blkio_base, cg->id); + if (likely(stat(filename, &buf) != -1)) { + cg->io_queued.filename = strdupz(filename); + cg->io_queued.enabled = cgroup_enable_blkio_queued_ops; + } + } + } + + // Pids + if (unlikely(!cg->pids.pids_current_filename)) { + snprintfz(filename, FILENAME_MAX, "%s%s/pids.current", cgroup_pids_base, cg->id); + if (likely(stat(filename, &buf) != -1)) { + cg->pids.pids_current_filename = strdupz(filename); + } + } +} + +static inline void discovery_update_filenames_cgroup_v2(struct cgroup *cg) { + char filename[FILENAME_MAX + 1]; + struct stat buf; + + // CPU + if (unlikely((cgroup_enable_cpuacct_stat || cgroup_enable_cpuacct_cpu_throttling) && !cg->cpuacct_stat.filename)) { + snprintfz(filename, FILENAME_MAX, "%s%s/cpu.stat", cgroup_unified_base, cg->id); + if (likely(stat(filename, &buf) != -1)) { + cg->cpuacct_stat.filename = strdupz(filename); + cg->cpuacct_stat.enabled = cgroup_enable_cpuacct_stat; + cg->cpuacct_cpu_throttling.enabled = cgroup_enable_cpuacct_cpu_throttling; + cg->filename_cpuset_cpus = NULL; + cg->filename_cpu_cfs_period = NULL; + snprintfz(filename, FILENAME_MAX, "%s%s/cpu.max", cgroup_unified_base, cg->id); + cg->filename_cpu_cfs_quota = strdupz(filename); + } + } + if (unlikely(cgroup_enable_cpuacct_cpu_shares && !cg->cpuacct_cpu_shares.filename)) { + snprintfz(filename, FILENAME_MAX, "%s%s/cpu.weight", cgroup_unified_base, cg->id); + if (likely(stat(filename, &buf) != -1)) { + cg->cpuacct_cpu_shares.filename = strdupz(filename); + cg->cpuacct_cpu_shares.enabled = cgroup_enable_cpuacct_cpu_shares; + } + } + + // Memory + // FIXME: this if condition! + if (unlikely( + (cgroup_enable_detailed_memory || cgroup_used_memory) && !cg->memory.filename_detailed && + (cgroup_used_memory || cgroup_enable_systemd_services_detailed_memory || !is_cgroup_systemd_service(cg)))) { + snprintfz(filename, FILENAME_MAX, "%s%s/memory.stat", cgroup_unified_base, cg->id); + if (likely(stat(filename, &buf) != -1)) { + cg->memory.filename_detailed = strdupz(filename); + cg->memory.enabled_detailed = + (cgroup_enable_detailed_memory == CONFIG_BOOLEAN_YES) ? CONFIG_BOOLEAN_YES : CONFIG_BOOLEAN_AUTO; + } + } + + if (unlikely(cgroup_enable_memory && !cg->memory.filename_usage_in_bytes)) { + snprintfz(filename, FILENAME_MAX, "%s%s/memory.current", cgroup_unified_base, cg->id); + if (likely(stat(filename, &buf) != -1)) { + cg->memory.filename_usage_in_bytes = strdupz(filename); + cg->memory.enabled_usage_in_bytes = cgroup_enable_memory; + snprintfz(filename, FILENAME_MAX, "%s%s/memory.max", cgroup_unified_base, cg->id); + cg->filename_memory_limit = strdupz(filename); + } + } + + if (unlikely(cgroup_enable_swap && !cg->memory.filename_msw_usage_in_bytes)) { + snprintfz(filename, FILENAME_MAX, "%s%s/memory.swap.current", cgroup_unified_base, cg->id); + if (likely(stat(filename, &buf) != -1)) { + cg->memory.filename_msw_usage_in_bytes = strdupz(filename); + cg->memory.enabled_msw_usage_in_bytes = cgroup_enable_swap; + snprintfz(filename, FILENAME_MAX, "%s%s/memory.swap.max", cgroup_unified_base, cg->id); + cg->filename_memoryswap_limit = strdupz(filename); + } + } + + // Blkio + if (unlikely(cgroup_enable_blkio_io && !cg->io_service_bytes.filename)) { + snprintfz(filename, FILENAME_MAX, "%s%s/io.stat", cgroup_unified_base, cg->id); + if (likely(stat(filename, &buf) != -1)) { + cg->io_service_bytes.filename = strdupz(filename); + cg->io_service_bytes.enabled = cgroup_enable_blkio_io; + } + } + + if (unlikely(cgroup_enable_blkio_ops && !cg->io_serviced.filename)) { + snprintfz(filename, FILENAME_MAX, "%s%s/io.stat", cgroup_unified_base, cg->id); + if (likely(stat(filename, &buf) != -1)) { + cg->io_serviced.filename = strdupz(filename); + cg->io_serviced.enabled = cgroup_enable_blkio_ops; + } + } + + // PSI + if (unlikely(cgroup_enable_pressure_cpu && !cg->cpu_pressure.filename)) { + snprintfz(filename, FILENAME_MAX, "%s%s/cpu.pressure", cgroup_unified_base, cg->id); + if (likely(stat(filename, &buf) != -1)) { + cg->cpu_pressure.filename = strdupz(filename); + cg->cpu_pressure.some.enabled = cgroup_enable_pressure_cpu; + cg->cpu_pressure.full.enabled = CONFIG_BOOLEAN_NO; + } + } + + if (unlikely((cgroup_enable_pressure_io_some || cgroup_enable_pressure_io_full) && !cg->io_pressure.filename)) { + snprintfz(filename, FILENAME_MAX, "%s%s/io.pressure", cgroup_unified_base, cg->id); + if (likely(stat(filename, &buf) != -1)) { + cg->io_pressure.filename = strdupz(filename); + cg->io_pressure.some.enabled = cgroup_enable_pressure_io_some; + cg->io_pressure.full.enabled = cgroup_enable_pressure_io_full; + } + } + + if (unlikely( + (cgroup_enable_pressure_memory_some || cgroup_enable_pressure_memory_full) && + !cg->memory_pressure.filename)) { + snprintfz(filename, FILENAME_MAX, "%s%s/memory.pressure", cgroup_unified_base, cg->id); + if (likely(stat(filename, &buf) != -1)) { + cg->memory_pressure.filename = strdupz(filename); + cg->memory_pressure.some.enabled = cgroup_enable_pressure_memory_some; + cg->memory_pressure.full.enabled = cgroup_enable_pressure_memory_full; + } + } + + if (unlikely((cgroup_enable_pressure_irq_some || cgroup_enable_pressure_irq_full) && !cg->irq_pressure.filename)) { + snprintfz(filename, FILENAME_MAX, "%s%s/irq.pressure", cgroup_unified_base, cg->id); + if (likely(stat(filename, &buf) != -1)) { + cg->irq_pressure.filename = strdupz(filename); + cg->irq_pressure.some.enabled = cgroup_enable_pressure_irq_some; + cg->irq_pressure.full.enabled = cgroup_enable_pressure_irq_full; + } + } + + // Pids + if (unlikely(!cg->pids.pids_current_filename)) { + snprintfz(filename, FILENAME_MAX, "%s%s/pids.current", cgroup_unified_base, cg->id); + if (likely(stat(filename, &buf) != -1)) { + cg->pids.pids_current_filename = strdupz(filename); + } + } +} + +static inline void discovery_update_filenames_all_cgroups() { + for (struct cgroup *cg = discovered_cgroup_root; cg; cg = cg->discovered_next) { + if (unlikely(!cg->available || !cg->enabled || cg->pending_renames)) + continue; + + if (!cgroup_use_unified_cgroups) + discovery_update_filenames_cgroup_v1(cg); + else if (likely(cgroup_unified_exist)) + discovery_update_filenames_cgroup_v2(cg); + } +} + +static inline void discovery_cleanup_all_cgroups() { + struct cgroup *cg = discovered_cgroup_root, *last = NULL; + + for(; cg ;) { + if(!cg->available) { + // enable the first duplicate cgroup + { + struct cgroup *t; + for (t = discovered_cgroup_root; t; t = t->discovered_next) { + if (t != cg && t->available && !t->enabled && t->options & CGROUP_OPTIONS_DISABLED_DUPLICATE && + (is_cgroup_systemd_service(t) == is_cgroup_systemd_service(cg)) && + t->hash_chart_id == cg->hash_chart_id && !strcmp(t->chart_id, cg->chart_id)) { + netdata_log_debug(D_CGROUP, "Enabling duplicate of cgroup '%s' with id '%s', because the original with id '%s' stopped.", t->chart_id, t->id, cg->id); + t->enabled = 1; + t->options &= ~CGROUP_OPTIONS_DISABLED_DUPLICATE; + break; + } + } + } + + if(!last) + discovered_cgroup_root = cg->discovered_next; + else + last->discovered_next = cg->discovered_next; + + cgroup_free(cg); + + if(!last) + cg = discovered_cgroup_root; + else + cg = last->discovered_next; + } + else { + last = cg; + cg = cg->discovered_next; + } + } +} + +static inline void discovery_copy_discovered_cgroups_to_reader() { + netdata_log_debug(D_CGROUP, "copy discovered cgroups to the main group list"); + + struct cgroup *cg; + + for (cg = discovered_cgroup_root; cg; cg = cg->discovered_next) { + cg->next = cg->discovered_next; + } + + cgroup_root = discovered_cgroup_root; +} + +static inline void discovery_share_cgroups_with_ebpf() { + struct cgroup *cg; + int count; + struct stat buf; + + if (shm_mutex_cgroup_ebpf == SEM_FAILED) { + return; + } + sem_wait(shm_mutex_cgroup_ebpf); + + for (cg = cgroup_root, count = 0; cg; cg = cg->next, count++) { + netdata_ebpf_cgroup_shm_body_t *ptr = &shm_cgroup_ebpf.body[count]; + char *prefix = (is_cgroup_systemd_service(cg)) ? services_chart_id_prefix : cgroup_chart_id_prefix; + snprintfz(ptr->name, CGROUP_EBPF_NAME_SHARED_LENGTH - 1, "%s%s", prefix, cg->chart_id); + ptr->hash = simple_hash(ptr->name); + ptr->options = cg->options; + ptr->enabled = cg->enabled; + if (cgroup_use_unified_cgroups) { + snprintfz(ptr->path, FILENAME_MAX, "%s%s/cgroup.procs", cgroup_unified_base, cg->id); + if (likely(stat(ptr->path, &buf) == -1)) { + ptr->path[0] = '\0'; + ptr->enabled = 0; + } + } else { + is_cgroup_procs_exist(ptr, cg->id); + } + + netdata_log_debug(D_CGROUP, "cgroup shared: NAME=%s, ENABLED=%d", ptr->name, ptr->enabled); + } + + shm_cgroup_ebpf.header->cgroup_root_count = count; + sem_post(shm_mutex_cgroup_ebpf); +} + +static inline void discovery_find_all_cgroups_v1() { + if (cgroup_enable_cpuacct_stat || cgroup_enable_cpuacct_usage) { + if (discovery_find_dir_in_subdirs(cgroup_cpuacct_base, NULL, discovery_find_cgroup_in_dir_callback) == -1) { + cgroup_enable_cpuacct_stat = cgroup_enable_cpuacct_usage = CONFIG_BOOLEAN_NO; + collector_error("CGROUP: disabled cpu statistics."); + } + } + + if (cgroup_enable_blkio_io || cgroup_enable_blkio_ops || cgroup_enable_blkio_throttle_io || + cgroup_enable_blkio_throttle_ops || cgroup_enable_blkio_merged_ops || cgroup_enable_blkio_queued_ops) { + if (discovery_find_dir_in_subdirs(cgroup_blkio_base, NULL, discovery_find_cgroup_in_dir_callback) == -1) { + cgroup_enable_blkio_io = cgroup_enable_blkio_ops = cgroup_enable_blkio_throttle_io = + cgroup_enable_blkio_throttle_ops = cgroup_enable_blkio_merged_ops = cgroup_enable_blkio_queued_ops = + CONFIG_BOOLEAN_NO; + collector_error("CGROUP: disabled blkio statistics."); + } + } + + if (cgroup_enable_memory || cgroup_enable_detailed_memory || cgroup_enable_swap || cgroup_enable_memory_failcnt) { + if (discovery_find_dir_in_subdirs(cgroup_memory_base, NULL, discovery_find_cgroup_in_dir_callback) == -1) { + cgroup_enable_memory = cgroup_enable_detailed_memory = cgroup_enable_swap = cgroup_enable_memory_failcnt = + CONFIG_BOOLEAN_NO; + collector_error("CGROUP: disabled memory statistics."); + } + } + + if (cgroup_search_in_devices) { + if (discovery_find_dir_in_subdirs(cgroup_devices_base, NULL, discovery_find_cgroup_in_dir_callback) == -1) { + cgroup_search_in_devices = 0; + collector_error("CGROUP: disabled devices statistics."); + } + } +} + +static inline void discovery_find_all_cgroups_v2() { + if (discovery_find_dir_in_subdirs(cgroup_unified_base, NULL, discovery_find_cgroup_in_dir_callback) == -1) { + cgroup_unified_exist = CONFIG_BOOLEAN_NO; + collector_error("CGROUP: disabled unified cgroups statistics."); + } +} + +static int is_digits_only(const char *s) { + do { + if (!isdigit(*s++)) { + return 0; + } + } while (*s); + + return 1; +} + +static int is_cgroup_k8s_container(const char *id) { + // examples: + // https://github.com/netdata/netdata/blob/0fc101679dcd12f1cb8acdd07bb4c85d8e553e53/collectors/cgroups.plugin/cgroup-name.sh#L121-L147 + const char *p = id; + const char *pp = NULL; + int i = 0; + size_t l = 3; // pod + while ((p = strstr(p, "pod"))) { + i++; + p += l; + pp = p; + } + return !(i < 2 || !pp || !(pp = strchr(pp, '/')) || !pp++ || !*pp); +} + +#define TASK_COMM_LEN 16 + +static int k8s_get_container_first_proc_comm(const char *id, char *comm) { + if (!is_cgroup_k8s_container(id)) { + return 1; + } + + static procfile *ff = NULL; + + char filename[FILENAME_MAX + 1]; + snprintfz(filename, FILENAME_MAX, "%s/%s/cgroup.procs", cgroup_cpuacct_base, id); + + ff = procfile_reopen(ff, filename, NULL, CGROUP_PROCFILE_FLAG); + if (unlikely(!ff)) { + netdata_log_debug(D_CGROUP, "CGROUP: k8s_is_pause_container(): cannot open file '%s'.", filename); + return 1; + } + + ff = procfile_readall(ff); + if (unlikely(!ff)) { + netdata_log_debug(D_CGROUP, "CGROUP: k8s_is_pause_container(): cannot read file '%s'.", filename); + return 1; + } + + unsigned long lines = procfile_lines(ff); + if (likely(lines < 2)) { + return 1; + } + + char *pid = procfile_lineword(ff, 0, 0); + if (!pid || !*pid) { + return 1; + } + + snprintfz(filename, FILENAME_MAX, "%s/proc/%s/comm", netdata_configured_host_prefix, pid); + + ff = procfile_reopen(ff, filename, NULL, PROCFILE_FLAG_DEFAULT); + if (unlikely(!ff)) { + netdata_log_debug(D_CGROUP, "CGROUP: k8s_is_pause_container(): cannot open file '%s'.", filename); + return 1; + } + + ff = procfile_readall(ff); + if (unlikely(!ff)) { + netdata_log_debug(D_CGROUP, "CGROUP: k8s_is_pause_container(): cannot read file '%s'.", filename); + return 1; + } + + lines = procfile_lines(ff); + if (unlikely(lines != 2)) { + return 1; + } + + char *proc_comm = procfile_lineword(ff, 0, 0); + if (!proc_comm || !*proc_comm) { + return 1; + } + + strncpyz(comm, proc_comm, TASK_COMM_LEN); + return 0; +} + +static inline void discovery_process_first_time_seen_cgroup(struct cgroup *cg) { + if (!cg->first_time_seen) { + return; + } + cg->first_time_seen = 0; + + char comm[TASK_COMM_LEN + 1]; + + if (cg->container_orchestrator == CGROUPS_ORCHESTRATOR_UNSET) { + if (strstr(cg->id, "kubepods")) { + cg->container_orchestrator = CGROUPS_ORCHESTRATOR_K8S; + } else { + cg->container_orchestrator = CGROUPS_ORCHESTRATOR_UNKNOWN; + } + } + + if (is_inside_k8s && !k8s_get_container_first_proc_comm(cg->id, comm)) { + // container initialization may take some time when CPU % is high + // seen on GKE: comm is '6' before 'runc:[2:INIT]' (dunno if it could be another number) + if (is_digits_only(comm) || matches_entrypoint_parent_process_comm(comm)) { + cg->first_time_seen = 1; + return; + } + if (!strcmp(comm, "pause")) { + // a container that holds the network namespace for the pod + // we don't need to collect its metrics + cg->processed = 1; + return; + } + } + + if (cgroup_enable_systemd_services && matches_systemd_services_cgroups(cg->id)) { + netdata_log_debug(D_CGROUP, "cgroup '%s' (name '%s') matches 'cgroups to match as systemd services'", cg->id, cg->chart_id); + convert_cgroup_to_systemd_service(cg); + return; + } + + if (matches_enabled_cgroup_renames(cg->id)) { + netdata_log_debug(D_CGROUP, "cgroup '%s' (name '%s') matches 'run script to rename cgroups matching', will try to rename it", cg->id, cg->chart_id); + if (is_inside_k8s && is_cgroup_k8s_container(cg->id)) { + // it may take up to a minute for the K8s API to return data for the container + // tested on AWS K8s cluster with 100% CPU utilization + cg->pending_renames = 9; // 1.5 minute + } else { + cg->pending_renames = 2; + } + } +} + +static int discovery_is_cgroup_duplicate(struct cgroup *cg) { + // https://github.com/netdata/netdata/issues/797#issuecomment-241248884 + struct cgroup *c; + for (c = discovered_cgroup_root; c; c = c->discovered_next) { + if (c != cg && c->enabled && (is_cgroup_systemd_service(c) == is_cgroup_systemd_service(cg)) && + c->hash_chart_id == cg->hash_chart_id && !strcmp(c->chart_id, cg->chart_id)) { + collector_error( + "CGROUP: chart id '%s' already exists with id '%s' and is enabled and available. Disabling cgroup with id '%s'.", + cg->chart_id, + c->id, + cg->id); + return 1; + } + } + return 0; +} + +// ---------------------------------------------------------------------------- +// cgroup network interfaces + +#define CGROUP_NETWORK_INTERFACE_MAX_LINE 2048 + +static inline void read_cgroup_network_interfaces(struct cgroup *cg) { + netdata_log_debug(D_CGROUP, "looking for the network interfaces of cgroup '%s' with chart id '%s'", cg->id, cg->chart_id); + + pid_t cgroup_pid; + char cgroup_identifier[CGROUP_NETWORK_INTERFACE_MAX_LINE + 1]; + + if(!(cg->options & CGROUP_OPTIONS_IS_UNIFIED)) { + snprintfz(cgroup_identifier, CGROUP_NETWORK_INTERFACE_MAX_LINE, "%s%s", cgroup_cpuacct_base, cg->id); + } + else { + snprintfz(cgroup_identifier, CGROUP_NETWORK_INTERFACE_MAX_LINE, "%s%s", cgroup_unified_base, cg->id); + } + + netdata_log_debug(D_CGROUP, "executing cgroup_identifier %s --cgroup '%s' for cgroup '%s'", cgroups_network_interface_script, cgroup_identifier, cg->id); + FILE *fp_child_input, *fp_child_output; + (void)netdata_popen_raw_default_flags_and_environment(&cgroup_pid, &fp_child_input, &fp_child_output, cgroups_network_interface_script, "--cgroup", cgroup_identifier); + if(!fp_child_output) { + collector_error("CGROUP: cannot popen(%s --cgroup \"%s\", \"r\").", cgroups_network_interface_script, cgroup_identifier); + return; + } + + char *s; + char buffer[CGROUP_NETWORK_INTERFACE_MAX_LINE + 1]; + while((s = fgets(buffer, CGROUP_NETWORK_INTERFACE_MAX_LINE, fp_child_output))) { + trim(s); + + if(*s && *s != '\n') { + char *t = s; + while(*t && *t != ' ') t++; + if(*t == ' ') { + *t = '\0'; + t++; + } + + if(!*s) { + collector_error("CGROUP: empty host interface returned by script"); + continue; + } + + if(!*t) { + collector_error("CGROUP: empty guest interface returned by script"); + continue; + } + + struct cgroup_network_interface *i = callocz(1, sizeof(struct cgroup_network_interface)); + i->host_device = strdupz(s); + i->container_device = strdupz(t); + i->next = cg->interfaces; + cg->interfaces = i; + + collector_info("CGROUP: cgroup '%s' has network interface '%s' as '%s'", cg->id, i->host_device, i->container_device); + + // register a device rename to proc_net_dev.c + netdev_rename_device_add(i->host_device, i->container_device, cg->chart_id, cg->chart_labels, + k8s_is_kubepod(cg) ? "k8s." : "", cgroup_netdev_get(cg)); + } + } + + netdata_pclose(fp_child_input, fp_child_output, cgroup_pid); + // netdata_log_debug(D_CGROUP, "closed cgroup_identifier for cgroup '%s'", cg->id); +} + +static inline void discovery_process_cgroup(struct cgroup *cg) { + if (!cg->available || cg->processed) { + return; + } + + if (cg->first_time_seen) { + worker_is_busy(WORKER_DISCOVERY_PROCESS_FIRST_TIME); + discovery_process_first_time_seen_cgroup(cg); + if (unlikely(cg->first_time_seen || cg->processed)) { + return; + } + } + + if (cg->pending_renames) { + worker_is_busy(WORKER_DISCOVERY_PROCESS_RENAME); + discovery_rename_cgroup(cg); + if (unlikely(cg->pending_renames || cg->processed)) { + return; + } + } + + cg->processed = 1; + + if ((strlen(cg->chart_id) + strlen(cgroup_chart_id_prefix)) >= RRD_ID_LENGTH_MAX) { + collector_info("cgroup '%s' (chart id '%s') disabled because chart_id exceeds the limit (RRD_ID_LENGTH_MAX)", cg->id, cg->chart_id); + return; + } + + if (is_cgroup_systemd_service(cg)) { + if (discovery_is_cgroup_duplicate(cg)) { + cg->enabled = 0; + cg->options |= CGROUP_OPTIONS_DISABLED_DUPLICATE; + return; + } + if (!cg->chart_labels) + cg->chart_labels = rrdlabels_create(); + rrdlabels_add(cg->chart_labels, "service_name", cg->name, RRDLABEL_SRC_AUTO); + cg->enabled = 1; + return; + } + + if (!(cg->enabled = matches_enabled_cgroup_names(cg->name))) { + netdata_log_debug(D_CGROUP, "cgroup '%s' (name '%s') disabled by 'enable by default cgroups names matching'", cg->id, cg->name); + return; + } + + if (!(cg->enabled = matches_enabled_cgroup_paths(cg->id))) { + netdata_log_debug(D_CGROUP, "cgroup '%s' (name '%s') disabled by 'enable by default cgroups matching'", cg->id, cg->name); + return; + } + + if (discovery_is_cgroup_duplicate(cg)) { + cg->enabled = 0; + cg->options |= CGROUP_OPTIONS_DISABLED_DUPLICATE; + return; + } + + if (!cg->chart_labels) + cg->chart_labels = rrdlabels_create(); + + if (!k8s_is_kubepod(cg)) { + rrdlabels_add(cg->chart_labels, "cgroup_name", cg->name, RRDLABEL_SRC_AUTO); + if (!rrdlabels_exist(cg->chart_labels, "image")) + rrdlabels_add(cg->chart_labels, "image", "", RRDLABEL_SRC_AUTO); + } + + worker_is_busy(WORKER_DISCOVERY_PROCESS_NETWORK); + read_cgroup_network_interfaces(cg); +} + +static inline void discovery_find_all_cgroups() { + netdata_log_debug(D_CGROUP, "searching for cgroups"); + + worker_is_busy(WORKER_DISCOVERY_INIT); + discovery_mark_as_unavailable_all_cgroups(); + + worker_is_busy(WORKER_DISCOVERY_FIND); + if (!cgroup_use_unified_cgroups) { + discovery_find_all_cgroups_v1(); + } else { + discovery_find_all_cgroups_v2(); + } + + for (struct cgroup *cg = discovered_cgroup_root; cg; cg = cg->discovered_next) { + worker_is_busy(WORKER_DISCOVERY_PROCESS); + discovery_process_cgroup(cg); + } + + worker_is_busy(WORKER_DISCOVERY_UPDATE); + discovery_update_filenames_all_cgroups(); + + worker_is_busy(WORKER_DISCOVERY_LOCK); + uv_mutex_lock(&cgroup_root_mutex); + + worker_is_busy(WORKER_DISCOVERY_CLEANUP); + discovery_cleanup_all_cgroups(); + + worker_is_busy(WORKER_DISCOVERY_COPY); + discovery_copy_discovered_cgroups_to_reader(); + + uv_mutex_unlock(&cgroup_root_mutex); + + worker_is_busy(WORKER_DISCOVERY_SHARE); + discovery_share_cgroups_with_ebpf(); + + netdata_log_debug(D_CGROUP, "done searching for cgroups"); +} + +void cgroup_discovery_worker(void *ptr) +{ + UNUSED(ptr); + + worker_register("CGROUPSDISC"); + worker_register_job_name(WORKER_DISCOVERY_INIT, "init"); + worker_register_job_name(WORKER_DISCOVERY_FIND, "find"); + worker_register_job_name(WORKER_DISCOVERY_PROCESS, "process"); + worker_register_job_name(WORKER_DISCOVERY_PROCESS_RENAME, "rename"); + worker_register_job_name(WORKER_DISCOVERY_PROCESS_NETWORK, "network"); + worker_register_job_name(WORKER_DISCOVERY_PROCESS_FIRST_TIME, "new"); + worker_register_job_name(WORKER_DISCOVERY_UPDATE, "update"); + worker_register_job_name(WORKER_DISCOVERY_CLEANUP, "cleanup"); + worker_register_job_name(WORKER_DISCOVERY_COPY, "copy"); + worker_register_job_name(WORKER_DISCOVERY_SHARE, "share"); + worker_register_job_name(WORKER_DISCOVERY_LOCK, "lock"); + + entrypoint_parent_process_comm = simple_pattern_create( + " runc:[* " // http://terenceli.github.io/%E6%8A%80%E6%9C%AF/2021/12/28/runc-internals-3) + " exe ", // https://github.com/falcosecurity/falco/blob/9d41b0a151b83693929d3a9c84f7c5c85d070d3a/rules/falco_rules.yaml#L1961 + NULL, + SIMPLE_PATTERN_EXACT, true); + + service_register(SERVICE_THREAD_TYPE_LIBUV, NULL, NULL, NULL, false); + + while (service_running(SERVICE_COLLECTORS)) { + worker_is_idle(); + + uv_mutex_lock(&discovery_thread.mutex); + uv_cond_wait(&discovery_thread.cond_var, &discovery_thread.mutex); + uv_mutex_unlock(&discovery_thread.mutex); + + if (unlikely(!service_running(SERVICE_COLLECTORS))) + break; + + discovery_find_all_cgroups(); + } + collector_info("discovery thread stopped"); + worker_unregister(); + service_exits(); + __atomic_store_n(&discovery_thread.exited,1,__ATOMIC_RELAXED); +} |