diff options
Diffstat (limited to 'src/collectors/cgroups.plugin/sys_fs_cgroup.c')
| -rw-r--r-- | src/collectors/cgroups.plugin/sys_fs_cgroup.c | 1458 |
1 files changed, 1458 insertions, 0 deletions
diff --git a/src/collectors/cgroups.plugin/sys_fs_cgroup.c b/src/collectors/cgroups.plugin/sys_fs_cgroup.c new file mode 100644 index 000000000..592152401 --- /dev/null +++ b/src/collectors/cgroups.plugin/sys_fs_cgroup.c @@ -0,0 +1,1458 @@ +// SPDX-License-Identifier: GPL-3.0-or-later + +#include "cgroup-internals.h" + +// main cgroups thread worker jobs +#define WORKER_CGROUPS_LOCK 0 +#define WORKER_CGROUPS_READ 1 +#define WORKER_CGROUPS_CHART 2 + +// ---------------------------------------------------------------------------- +// cgroup globals +unsigned long long host_ram_total = 0; +bool is_inside_k8s = false; +long system_page_size = 4096; // system will be queried via sysconf() in configuration() + +int cgroup_use_unified_cgroups = CONFIG_BOOLEAN_AUTO; +bool cgroup_unified_exist = true; + +bool cgroup_enable_blkio = true; +bool cgroup_enable_pressure = true; +bool cgroup_enable_memory = true; +bool cgroup_enable_cpuacct = true; +bool cgroup_enable_cpuacct_cpu_shares = false; + +int cgroup_check_for_new_every = 10; +int cgroup_update_every = 1; +char *cgroup_cpuacct_base = NULL; +char *cgroup_cpuset_base = NULL; +char *cgroup_blkio_base = NULL; +char *cgroup_memory_base = NULL; +char *cgroup_pids_base = NULL; +char *cgroup_unified_base = NULL; +int cgroup_root_count = 0; +int cgroup_root_max = 1000; +int cgroup_max_depth = 0; +SIMPLE_PATTERN *enabled_cgroup_paths = NULL; +SIMPLE_PATTERN *enabled_cgroup_names = NULL; +SIMPLE_PATTERN *search_cgroup_paths = NULL; +SIMPLE_PATTERN *enabled_cgroup_renames = NULL; +SIMPLE_PATTERN *systemd_services_cgroups = NULL; +SIMPLE_PATTERN *entrypoint_parent_process_comm = NULL; +char *cgroups_network_interface_script = NULL; +int cgroups_check = 0; +uint32_t Read_hash = 0; +uint32_t Write_hash = 0; +uint32_t user_hash = 0; +uint32_t system_hash = 0; +uint32_t user_usec_hash = 0; +uint32_t system_usec_hash = 0; +uint32_t nr_periods_hash = 0; +uint32_t nr_throttled_hash = 0; +uint32_t throttled_time_hash = 0; +uint32_t throttled_usec_hash = 0; + +// *** WARNING *** The fields are not thread safe. Take care of safe usage. +struct cgroup *cgroup_root = NULL; +uv_mutex_t cgroup_root_mutex; + +struct cgroups_systemd_config_setting cgroups_systemd_options[] = { + { .name = "legacy", .setting = SYSTEMD_CGROUP_LEGACY }, + { .name = "hybrid", .setting = SYSTEMD_CGROUP_HYBRID }, + { .name = "unified", .setting = SYSTEMD_CGROUP_UNIFIED }, + { .name = NULL, .setting = SYSTEMD_CGROUP_ERR }, +}; + +struct discovery_thread discovery_thread; + + +/* on Fed systemd is not in PATH for some reason */ +#define SYSTEMD_CMD_RHEL "/usr/lib/systemd/systemd --version" +#define SYSTEMD_HIERARCHY_STRING "default-hierarchy=" + +#define MAXSIZE_PROC_CMDLINE 4096 +static enum cgroups_systemd_setting cgroups_detect_systemd(const char *exec) +{ + pid_t command_pid; + enum cgroups_systemd_setting retval = SYSTEMD_CGROUP_ERR; + char buf[MAXSIZE_PROC_CMDLINE]; + char *begin, *end; + + FILE *fp_child_input; + FILE *fp_child_output = netdata_popen(exec, &command_pid, &fp_child_input); + + if (!fp_child_output) + return retval; + + int fd = fileno(fp_child_output); + if (fd == -1 ) { + collector_error("Cannot get the output of \"%s\": failed to get file descriptor", exec); + netdata_pclose(fp_child_input, fp_child_output, command_pid); + return retval; + } + + struct pollfd pfd; + pfd.fd = fd; + pfd.events = POLLIN; + + int timeout = 3000; // milliseconds + + int ret = poll(&pfd, 1, timeout); + + if (ret == -1) { + collector_error("Failed to get the output of \"%s\"", exec); + } else if (ret == 0) { + collector_info("Cannot get the output of \"%s\" within timeout (%d ms)", exec, timeout); + } else { + while (fgets(buf, MAXSIZE_PROC_CMDLINE, fp_child_output) != NULL) { + if ((begin = strstr(buf, SYSTEMD_HIERARCHY_STRING))) { + end = begin = begin + strlen(SYSTEMD_HIERARCHY_STRING); + if (!*begin) + break; + while (isalpha(*end)) + end++; + *end = 0; + for (int i = 0; cgroups_systemd_options[i].name; i++) { + if (!strcmp(begin, cgroups_systemd_options[i].name)) { + retval = cgroups_systemd_options[i].setting; + break; + } + } + break; + } + } + } + + if (netdata_pclose(fp_child_input, fp_child_output, command_pid)) + return SYSTEMD_CGROUP_ERR; + + return retval; +} + +static enum cgroups_type cgroups_try_detect_version() +{ + pid_t command_pid; + char buf[MAXSIZE_PROC_CMDLINE]; + enum cgroups_systemd_setting systemd_setting; + int cgroups2_available = 0; + + // 1. check if cgroups2 available on system at all + FILE *fp_child_input; + FILE *fp_child_output = netdata_popen("grep cgroup /proc/filesystems", &command_pid, &fp_child_input); + if (!fp_child_output) { + collector_error("popen failed"); + return CGROUPS_AUTODETECT_FAIL; + } + while (fgets(buf, MAXSIZE_PROC_CMDLINE, fp_child_output) != NULL) { + if (strstr(buf, "cgroup2")) { + cgroups2_available = 1; + break; + } + } + if(netdata_pclose(fp_child_input, fp_child_output, command_pid)) + return CGROUPS_AUTODETECT_FAIL; + + if(!cgroups2_available) + return CGROUPS_V1; + +#if defined CGROUP2_SUPER_MAGIC + // 2. check filesystem type for the default mountpoint + char filename[FILENAME_MAX + 1]; + snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, "/sys/fs/cgroup"); + struct statfs fsinfo; + if (!statfs(filename, &fsinfo)) { + if (fsinfo.f_type == CGROUP2_SUPER_MAGIC) + return CGROUPS_V2; + } +#endif + + // 3. check systemd compiletime setting + if ((systemd_setting = cgroups_detect_systemd("systemd --version")) == SYSTEMD_CGROUP_ERR) + systemd_setting = cgroups_detect_systemd(SYSTEMD_CMD_RHEL); + + if(systemd_setting == SYSTEMD_CGROUP_ERR) + return CGROUPS_AUTODETECT_FAIL; + + if(systemd_setting == SYSTEMD_CGROUP_LEGACY || systemd_setting == SYSTEMD_CGROUP_HYBRID) { + // currently we prefer V1 if HYBRID is set as it seems to be more feature complete + // in the future we might want to continue here if SYSTEMD_CGROUP_HYBRID + // and go ahead with V2 + return CGROUPS_V1; + } + + // 4. if we are unified as on Fedora (default cgroups2 only mode) + // check kernel command line flag that can override that setting + FILE *fp = fopen("/proc/cmdline", "r"); + if (!fp) { + collector_error("Error reading kernel boot commandline parameters"); + return CGROUPS_AUTODETECT_FAIL; + } + + if (!fgets(buf, MAXSIZE_PROC_CMDLINE, fp)) { + collector_error("couldn't read all cmdline params into buffer"); + fclose(fp); + return CGROUPS_AUTODETECT_FAIL; + } + + fclose(fp); + + if (strstr(buf, "systemd.unified_cgroup_hierarchy=0")) { + collector_info("cgroups v2 (unified cgroups) is available but are disabled on this system."); + return CGROUPS_V1; + } + return CGROUPS_V2; +} + +void set_cgroup_base_path(char *filename, char *path) { + if (strncmp(netdata_configured_host_prefix, path, strlen(netdata_configured_host_prefix)) == 0) { + snprintfz(filename, FILENAME_MAX, "%s", path); + } else { + snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, path); + } +} + +void read_cgroup_plugin_configuration() { + system_page_size = sysconf(_SC_PAGESIZE); + + Read_hash = simple_hash("Read"); + Write_hash = simple_hash("Write"); + user_hash = simple_hash("user"); + system_hash = simple_hash("system"); + user_usec_hash = simple_hash("user_usec"); + system_usec_hash = simple_hash("system_usec"); + nr_periods_hash = simple_hash("nr_periods"); + nr_throttled_hash = simple_hash("nr_throttled"); + throttled_time_hash = simple_hash("throttled_time"); + throttled_usec_hash = simple_hash("throttled_usec"); + + cgroup_update_every = (int)config_get_number("plugin:cgroups", "update every", localhost->rrd_update_every); + if(cgroup_update_every < localhost->rrd_update_every) + cgroup_update_every = localhost->rrd_update_every; + + cgroup_check_for_new_every = (int)config_get_number("plugin:cgroups", "check for new cgroups every", cgroup_check_for_new_every); + if(cgroup_check_for_new_every < cgroup_update_every) + cgroup_check_for_new_every = cgroup_update_every; + + cgroup_use_unified_cgroups = config_get_boolean_ondemand("plugin:cgroups", "use unified cgroups", CONFIG_BOOLEAN_AUTO); + if (cgroup_use_unified_cgroups == CONFIG_BOOLEAN_AUTO) + cgroup_use_unified_cgroups = (cgroups_try_detect_version() == CGROUPS_V2); + collector_info("use unified cgroups %s", cgroup_use_unified_cgroups ? "true" : "false"); + + char filename[FILENAME_MAX + 1], *s; + struct mountinfo *mi, *root = mountinfo_read(0); + if (!cgroup_use_unified_cgroups) { + mi = mountinfo_find_by_filesystem_super_option(root, "cgroup", "cpuacct"); + if (!mi) + mi = mountinfo_find_by_filesystem_mount_source(root, "cgroup", "cpuacct"); + if (!mi) { + collector_error("CGROUP: cannot find cpuacct mountinfo. Assuming default: /sys/fs/cgroup/cpuacct"); + s = "/sys/fs/cgroup/cpuacct"; + } else + s = mi->mount_point; + set_cgroup_base_path(filename, s); + cgroup_cpuacct_base = strdupz(filename); + + mi = mountinfo_find_by_filesystem_super_option(root, "cgroup", "cpuset"); + if (!mi) + mi = mountinfo_find_by_filesystem_mount_source(root, "cgroup", "cpuset"); + if (!mi) { + collector_error("CGROUP: cannot find cpuset mountinfo. Assuming default: /sys/fs/cgroup/cpuset"); + s = "/sys/fs/cgroup/cpuset"; + } else + s = mi->mount_point; + set_cgroup_base_path(filename, s); + cgroup_cpuset_base = strdupz(filename); + + mi = mountinfo_find_by_filesystem_super_option(root, "cgroup", "blkio"); + if (!mi) + mi = mountinfo_find_by_filesystem_mount_source(root, "cgroup", "blkio"); + if (!mi) { + collector_error("CGROUP: cannot find blkio mountinfo. Assuming default: /sys/fs/cgroup/blkio"); + s = "/sys/fs/cgroup/blkio"; + } else + s = mi->mount_point; + set_cgroup_base_path(filename, s); + cgroup_blkio_base = strdupz(filename); + + mi = mountinfo_find_by_filesystem_super_option(root, "cgroup", "memory"); + if (!mi) + mi = mountinfo_find_by_filesystem_mount_source(root, "cgroup", "memory"); + if (!mi) { + collector_error("CGROUP: cannot find memory mountinfo. Assuming default: /sys/fs/cgroup/memory"); + s = "/sys/fs/cgroup/memory"; + } else { + s = mi->mount_point; + } + set_cgroup_base_path(filename, s); + cgroup_memory_base = strdupz(filename); + + mi = mountinfo_find_by_filesystem_super_option(root, "cgroup", "pids"); + if (!mi) + mi = mountinfo_find_by_filesystem_mount_source(root, "cgroup", "pids"); + if (!mi) { + collector_error("CGROUP: cannot find pids mountinfo. Assuming default: /sys/fs/cgroup/pids"); + s = "/sys/fs/cgroup/pids"; + } else { + s = mi->mount_point; + } + + set_cgroup_base_path(filename, s); + cgroup_pids_base = strdupz(filename); + } else { + //TODO: can there be more than 1 cgroup2 mount point? + //there is no cgroup2 specific super option - for now use 'rw' option + mi = mountinfo_find_by_filesystem_super_option(root, "cgroup2", "rw"); + if (!mi) { + mi = mountinfo_find_by_filesystem_mount_source(root, "cgroup2", "cgroup"); + } + if (!mi) { + collector_error("CGROUP: cannot find cgroup2 mountinfo. Assuming default: /sys/fs/cgroup"); + s = "/sys/fs/cgroup"; + } else + s = mi->mount_point; + + set_cgroup_base_path(filename, s); + cgroup_unified_base = strdupz(filename); + } + + cgroup_root_max = (int)config_get_number("plugin:cgroups", "max cgroups to allow", cgroup_root_max); + cgroup_max_depth = (int)config_get_number("plugin:cgroups", "max cgroups depth to monitor", cgroup_max_depth); + + enabled_cgroup_paths = simple_pattern_create( + config_get("plugin:cgroups", "enable by default cgroups matching", + // ---------------------------------------------------------------- + + " !*/init.scope " // ignore init.scope + " !/system.slice/run-*.scope " // ignore system.slice/run-XXXX.scope + " *user.slice/docker-*" // allow docker rootless containers + " !*user.slice*" // ignore the rest stuff in user.slice + " *.scope " // we need all other *.scope for sure + + // ---------------------------------------------------------------- + + " /machine.slice/*.service " // #3367 systemd-nspawn + + // ---------------------------------------------------------------- + + " */kubepods/pod*/* " // k8s containers + " */kubepods/*/pod*/* " // k8s containers + " */*-kubepods-pod*/* " // k8s containers + " */*-kubepods-*-pod*/* " // k8s containers + " !*kubepods* !*kubelet* " // all other k8s cgroups + + // ---------------------------------------------------------------- + + " !*/vcpu* " // libvirtd adds these sub-cgroups + " !*/emulator " // libvirtd adds these sub-cgroups + " !*.mount " + " !*.partition " + " !*.service " + " !*.service/udev " + " !*.socket " + " !*.slice " + " !*.swap " + " !*.user " + " !/ " + " !/docker " + " !*/libvirt " + " !/lxc " + " !/lxc/*/* " // #1397 #2649 + " !/lxc.monitor* " + " !/lxc.pivot " + " !/lxc.payload " + " !*lxcfs.service/.control" + " !/machine " + " !/qemu " + " !/system " + " !/systemd " + " !/user " + " * " // enable anything else + ), NULL, SIMPLE_PATTERN_EXACT, true); + + enabled_cgroup_names = simple_pattern_create( + config_get("plugin:cgroups", "enable by default cgroups names matching", + " * " + ), NULL, SIMPLE_PATTERN_EXACT, true); + + search_cgroup_paths = simple_pattern_create( + config_get("plugin:cgroups", "search for cgroups in subpaths matching", + " !*/init.scope " // ignore init.scope + " !*-qemu " // #345 + " !*.libvirt-qemu " // #3010 + " !/init.scope " + " !/system " + " !/systemd " + " !/user " + " !/lxc/*/* " // #2161 #2649 + " !/lxc.monitor " + " !/lxc.payload/*/* " + " !/lxc.payload.* " + " * " + ), NULL, SIMPLE_PATTERN_EXACT, true); + + snprintfz(filename, FILENAME_MAX, "%s/cgroup-name.sh", netdata_configured_primary_plugins_dir); + cgroups_rename_script = config_get("plugin:cgroups", "script to get cgroup names", filename); + + snprintfz(filename, FILENAME_MAX, "%s/cgroup-network", netdata_configured_primary_plugins_dir); + cgroups_network_interface_script = config_get("plugin:cgroups", "script to get cgroup network interfaces", filename); + + enabled_cgroup_renames = simple_pattern_create( + config_get("plugin:cgroups", "run script to rename cgroups matching", + " !/ " + " !*.mount " + " !*.socket " + " !*.partition " + " /machine.slice/*.service " // #3367 systemd-nspawn + " !*.service " + " !*.slice " + " !*.swap " + " !*.user " + " !init.scope " + " !*.scope/vcpu* " // libvirtd adds these sub-cgroups + " !*.scope/emulator " // libvirtd adds these sub-cgroups + " *.scope " + " *docker* " + " *lxc* " + " *qemu* " + " */kubepods/pod*/* " // k8s containers + " */kubepods/*/pod*/* " // k8s containers + " */*-kubepods-pod*/* " // k8s containers + " */*-kubepods-*-pod*/* " // k8s containers + " !*kubepods* !*kubelet* " // all other k8s cgroups + " *.libvirt-qemu " // #3010 + " * " + ), NULL, SIMPLE_PATTERN_EXACT, true); + + systemd_services_cgroups = simple_pattern_create( + config_get( + "plugin:cgroups", + "cgroups to match as systemd services", + " !/system.slice/*/*.service " + " /system.slice/*.service "), + NULL, + SIMPLE_PATTERN_EXACT, + true); + + mountinfo_free_all(root); +} + +// --------------------------------------------------------------------------------------------- + +static unsigned long long calc_delta(unsigned long long curr, unsigned long long prev) { + if (prev > curr) { + return 0; + } + return curr - prev; +} + +static unsigned long long calc_percentage(unsigned long long value, unsigned long long total) { + if (total == 0) { + return 0; + } + return (unsigned long long)((NETDATA_DOUBLE)value / (NETDATA_DOUBLE)total * 100); +} + +// ---------------------------------------------------------------------------- +// read values from /sys + +static inline void cgroup_read_cpuacct_stat(struct cpuacct_stat *cp) { + static procfile *ff = NULL; + + if(likely(cp->filename)) { + ff = procfile_reopen(ff, cp->filename, NULL, CGROUP_PROCFILE_FLAG); + if(unlikely(!ff)) { + cp->updated = 0; + cgroups_check = 1; + return; + } + + ff = procfile_readall(ff); + if(unlikely(!ff)) { + cp->updated = 0; + cgroups_check = 1; + return; + } + + unsigned long i, lines = procfile_lines(ff); + + if(unlikely(lines < 1)) { + collector_error("CGROUP: file '%s' should have 1+ lines.", cp->filename); + cp->updated = 0; + return; + } + + for(i = 0; i < lines ; i++) { + char *s = procfile_lineword(ff, i, 0); + uint32_t hash = simple_hash(s); + + if(unlikely(hash == user_hash && !strcmp(s, "user"))) + cp->user = str2ull(procfile_lineword(ff, i, 1), NULL); + + else if(unlikely(hash == system_hash && !strcmp(s, "system"))) + cp->system = str2ull(procfile_lineword(ff, i, 1), NULL); + } + + cp->updated = 1; + } +} + +static inline void cgroup_read_cpuacct_cpu_stat(struct cpuacct_cpu_throttling *cp) { + if (unlikely(!cp->filename)) { + return; + } + + static procfile *ff = NULL; + ff = procfile_reopen(ff, cp->filename, NULL, CGROUP_PROCFILE_FLAG); + if (unlikely(!ff)) { + cp->updated = 0; + cgroups_check = 1; + return; + } + + ff = procfile_readall(ff); + if (unlikely(!ff)) { + cp->updated = 0; + cgroups_check = 1; + return; + } + + unsigned long lines = procfile_lines(ff); + if (unlikely(lines < 3)) { + collector_error("CGROUP: file '%s' should have 3 lines.", cp->filename); + cp->updated = 0; + return; + } + + unsigned long long nr_periods_last = cp->nr_periods; + unsigned long long nr_throttled_last = cp->nr_throttled; + + for (unsigned long i = 0; i < lines; i++) { + char *s = procfile_lineword(ff, i, 0); + uint32_t hash = simple_hash(s); + + if (unlikely(hash == nr_periods_hash && !strcmp(s, "nr_periods"))) { + cp->nr_periods = str2ull(procfile_lineword(ff, i, 1), NULL); + } else if (unlikely(hash == nr_throttled_hash && !strcmp(s, "nr_throttled"))) { + cp->nr_throttled = str2ull(procfile_lineword(ff, i, 1), NULL); + } else if (unlikely(hash == throttled_time_hash && !strcmp(s, "throttled_time"))) { + cp->throttled_time = str2ull(procfile_lineword(ff, i, 1), NULL); + } + } + cp->nr_throttled_perc = + calc_percentage(calc_delta(cp->nr_throttled, nr_throttled_last), calc_delta(cp->nr_periods, nr_periods_last)); + + cp->updated = 1; +} + +static inline void cgroup2_read_cpuacct_cpu_stat(struct cpuacct_stat *cp, struct cpuacct_cpu_throttling *cpt) { + static procfile *ff = NULL; + if (unlikely(!cp->filename)) { + return; + } + + ff = procfile_reopen(ff, cp->filename, NULL, CGROUP_PROCFILE_FLAG); + if (unlikely(!ff)) { + cp->updated = 0; + cgroups_check = 1; + return; + } + + ff = procfile_readall(ff); + if (unlikely(!ff)) { + cp->updated = 0; + cgroups_check = 1; + return; + } + + unsigned long lines = procfile_lines(ff); + + if (unlikely(lines < 3)) { + collector_error("CGROUP: file '%s' should have at least 3 lines.", cp->filename); + cp->updated = 0; + return; + } + + unsigned long long nr_periods_last = cpt->nr_periods; + unsigned long long nr_throttled_last = cpt->nr_throttled; + + for (unsigned long i = 0; i < lines; i++) { + char *s = procfile_lineword(ff, i, 0); + uint32_t hash = simple_hash(s); + + if (unlikely(hash == user_usec_hash && !strcmp(s, "user_usec"))) { + cp->user = str2ull(procfile_lineword(ff, i, 1), NULL); + } else if (unlikely(hash == system_usec_hash && !strcmp(s, "system_usec"))) { + cp->system = str2ull(procfile_lineword(ff, i, 1), NULL); + } else if (unlikely(hash == nr_periods_hash && !strcmp(s, "nr_periods"))) { + cpt->nr_periods = str2ull(procfile_lineword(ff, i, 1), NULL); + } else if (unlikely(hash == nr_throttled_hash && !strcmp(s, "nr_throttled"))) { + cpt->nr_throttled = str2ull(procfile_lineword(ff, i, 1), NULL); + } else if (unlikely(hash == throttled_usec_hash && !strcmp(s, "throttled_usec"))) { + cpt->throttled_time = str2ull(procfile_lineword(ff, i, 1), NULL) * 1000; // usec -> ns + } + } + cpt->nr_throttled_perc = + calc_percentage(calc_delta(cpt->nr_throttled, nr_throttled_last), calc_delta(cpt->nr_periods, nr_periods_last)); + + cp->updated = 1; + cpt->updated = 1; +} + +static inline void cgroup_read_cpuacct_cpu_shares(struct cpuacct_cpu_shares *cp) { + if (unlikely(!cp->filename)) { + return; + } + + if (unlikely(read_single_number_file(cp->filename, &cp->shares))) { + cp->updated = 0; + cgroups_check = 1; + return; + } + + cp->updated = 1; +} + +static inline void cgroup_read_cpuacct_usage(struct cpuacct_usage *ca) { + static procfile *ff = NULL; + + if(likely(ca->filename)) { + ff = procfile_reopen(ff, ca->filename, NULL, CGROUP_PROCFILE_FLAG); + if(unlikely(!ff)) { + ca->updated = 0; + cgroups_check = 1; + return; + } + + ff = procfile_readall(ff); + if(unlikely(!ff)) { + ca->updated = 0; + cgroups_check = 1; + return; + } + + if(unlikely(procfile_lines(ff) < 1)) { + collector_error("CGROUP: file '%s' should have 1+ lines but has %zu.", ca->filename, procfile_lines(ff)); + ca->updated = 0; + return; + } + + unsigned long i = procfile_linewords(ff, 0); + if(unlikely(i == 0)) { + ca->updated = 0; + return; + } + + // we may have 1 more CPU reported + while(i > 0) { + char *s = procfile_lineword(ff, 0, i - 1); + if(!*s) i--; + else break; + } + + if(unlikely(i != ca->cpus)) { + freez(ca->cpu_percpu); + ca->cpu_percpu = mallocz(sizeof(unsigned long long) * i); + ca->cpus = (unsigned int)i; + } + + unsigned long long total = 0; + for(i = 0; i < ca->cpus ;i++) { + unsigned long long n = str2ull(procfile_lineword(ff, 0, i), NULL); + ca->cpu_percpu[i] = n; + total += n; + } + + ca->updated = 1; + } +} + +static inline void cgroup_read_blkio(struct blkio *io) { + if (likely(io->filename)) { + static procfile *ff = NULL; + + ff = procfile_reopen(ff, io->filename, NULL, CGROUP_PROCFILE_FLAG); + if (unlikely(!ff)) { + io->updated = 0; + cgroups_check = 1; + return; + } + + ff = procfile_readall(ff); + if (unlikely(!ff)) { + io->updated = 0; + cgroups_check = 1; + return; + } + + unsigned long i, lines = procfile_lines(ff); + + if (unlikely(lines < 1)) { + collector_error("CGROUP: file '%s' should have 1+ lines.", io->filename); + io->updated = 0; + return; + } + + io->Read = 0; + io->Write = 0; + + for (i = 0; i < lines; i++) { + char *s = procfile_lineword(ff, i, 1); + uint32_t hash = simple_hash(s); + + if (unlikely(hash == Read_hash && !strcmp(s, "Read"))) + io->Read += str2ull(procfile_lineword(ff, i, 2), NULL); + else if (unlikely(hash == Write_hash && !strcmp(s, "Write"))) + io->Write += str2ull(procfile_lineword(ff, i, 2), NULL); + } + + io->updated = 1; + } +} + +static inline void cgroup2_read_blkio(struct blkio *io, unsigned int word_offset) { + if (likely(io->filename)) { + static procfile *ff = NULL; + + ff = procfile_reopen(ff, io->filename, NULL, CGROUP_PROCFILE_FLAG); + if (unlikely(!ff)) { + io->updated = 0; + cgroups_check = 1; + return; + } + + ff = procfile_readall(ff); + if (unlikely(!ff)) { + io->updated = 0; + cgroups_check = 1; + return; + } + + unsigned long i, lines = procfile_lines(ff); + + if (unlikely(lines < 1)) { + collector_error("CGROUP: file '%s' should have 1+ lines.", io->filename); + io->updated = 0; + return; + } + + io->Read = 0; + io->Write = 0; + + for (i = 0; i < lines; i++) { + io->Read += str2ull(procfile_lineword(ff, i, 2 + word_offset), NULL); + io->Write += str2ull(procfile_lineword(ff, i, 4 + word_offset), NULL); + } + + io->updated = 1; + } +} + +static inline void cgroup2_read_pressure(struct pressure *res) { + static procfile *ff = NULL; + + if (likely(res->filename)) { + ff = procfile_reopen(ff, res->filename, " =", CGROUP_PROCFILE_FLAG); + if (unlikely(!ff)) { + res->updated = 0; + cgroups_check = 1; + return; + } + + ff = procfile_readall(ff); + if (unlikely(!ff)) { + res->updated = 0; + cgroups_check = 1; + return; + } + + size_t lines = procfile_lines(ff); + if (lines < 1) { + collector_error("CGROUP: file '%s' should have 1+ lines.", res->filename); + res->updated = 0; + return; + } + + bool did_some = false, did_full = false; + + for(size_t l = 0; l < lines ;l++) { + const char *key = procfile_lineword(ff, l, 0); + if(strcmp(key, "some") == 0) { + res->some.share_time.value10 = strtod(procfile_lineword(ff, l, 2), NULL); + res->some.share_time.value60 = strtod(procfile_lineword(ff, l, 4), NULL); + res->some.share_time.value300 = strtod(procfile_lineword(ff, l, 6), NULL); + res->some.total_time.value_total = str2ull(procfile_lineword(ff, l, 8), NULL) / 1000; // us->ms + did_some = true; + } + else if(strcmp(key, "full") == 0) { + res->full.share_time.value10 = strtod(procfile_lineword(ff, l, 2), NULL); + res->full.share_time.value60 = strtod(procfile_lineword(ff, l, 4), NULL); + res->full.share_time.value300 = strtod(procfile_lineword(ff, l, 6), NULL); + res->full.total_time.value_total = str2ull(procfile_lineword(ff, l, 8), NULL) / 1000; // us->ms + did_full = true; + } + } + + res->updated = (did_full || did_some) ? 1 : 0; + res->some.available = did_some; + res->full.available = did_full; + } +} + +static inline void cgroup_read_memory(struct memory *mem, char parent_cg_is_unified) { + static procfile *ff = NULL; + + if(likely(mem->filename_detailed)) { + ff = procfile_reopen(ff, mem->filename_detailed, NULL, CGROUP_PROCFILE_FLAG); + if(unlikely(!ff)) { + mem->updated_detailed = 0; + cgroups_check = 1; + goto memory_next; + } + + ff = procfile_readall(ff); + if(unlikely(!ff)) { + mem->updated_detailed = 0; + cgroups_check = 1; + goto memory_next; + } + + unsigned long i, lines = procfile_lines(ff); + + if(unlikely(lines < 1)) { + collector_error("CGROUP: file '%s' should have 1+ lines.", mem->filename_detailed); + mem->updated_detailed = 0; + goto memory_next; + } + + + if(unlikely(!mem->arl_base)) { + if(parent_cg_is_unified == 0){ + mem->arl_base = arl_create("cgroup/memory", NULL, 60); + + arl_expect(mem->arl_base, "total_cache", &mem->total_cache); + arl_expect(mem->arl_base, "total_rss", &mem->total_rss); + arl_expect(mem->arl_base, "total_rss_huge", &mem->total_rss_huge); + arl_expect(mem->arl_base, "total_mapped_file", &mem->total_mapped_file); + arl_expect(mem->arl_base, "total_writeback", &mem->total_writeback); + mem->arl_dirty = arl_expect(mem->arl_base, "total_dirty", &mem->total_dirty); + mem->arl_swap = arl_expect(mem->arl_base, "total_swap", &mem->total_swap); + arl_expect(mem->arl_base, "total_pgpgin", &mem->total_pgpgin); + arl_expect(mem->arl_base, "total_pgpgout", &mem->total_pgpgout); + arl_expect(mem->arl_base, "total_pgfault", &mem->total_pgfault); + arl_expect(mem->arl_base, "total_pgmajfault", &mem->total_pgmajfault); + arl_expect(mem->arl_base, "total_inactive_file", &mem->total_inactive_file); + } else { + mem->arl_base = arl_create("cgroup/memory", NULL, 60); + + arl_expect(mem->arl_base, "anon", &mem->anon); + arl_expect(mem->arl_base, "kernel_stack", &mem->kernel_stack); + arl_expect(mem->arl_base, "slab", &mem->slab); + arl_expect(mem->arl_base, "sock", &mem->sock); + arl_expect(mem->arl_base, "anon_thp", &mem->anon_thp); + arl_expect(mem->arl_base, "file", &mem->total_mapped_file); + arl_expect(mem->arl_base, "file_writeback", &mem->total_writeback); + mem->arl_dirty = arl_expect(mem->arl_base, "file_dirty", &mem->total_dirty); + arl_expect(mem->arl_base, "pgfault", &mem->total_pgfault); + arl_expect(mem->arl_base, "pgmajfault", &mem->total_pgmajfault); + arl_expect(mem->arl_base, "inactive_file", &mem->total_inactive_file); + } + } + + arl_begin(mem->arl_base); + + for (i = 0; i < lines; i++) { + if (arl_check(mem->arl_base, procfile_lineword(ff, i, 0), procfile_lineword(ff, i, 1))) + break; + } + + if (unlikely(mem->arl_dirty->flags & ARL_ENTRY_FLAG_FOUND)) + mem->detailed_has_dirty = 1; + + if (unlikely(parent_cg_is_unified == 0 && mem->arl_swap->flags & ARL_ENTRY_FLAG_FOUND)) + mem->detailed_has_swap = 1; + + mem->updated_detailed = 1; + } + +memory_next: + + if (likely(mem->filename_usage_in_bytes)) { + mem->updated_usage_in_bytes = !read_single_number_file(mem->filename_usage_in_bytes, &mem->usage_in_bytes); + } + + if (likely(mem->updated_usage_in_bytes && mem->updated_detailed)) { + mem->usage_in_bytes = + (mem->usage_in_bytes > mem->total_inactive_file) ? (mem->usage_in_bytes - mem->total_inactive_file) : 0; + } + + if (likely(mem->filename_msw_usage_in_bytes)) { + mem->updated_msw_usage_in_bytes = + !read_single_number_file(mem->filename_msw_usage_in_bytes, &mem->msw_usage_in_bytes); + } + + if (likely(mem->filename_failcnt)) { + mem->updated_failcnt = !read_single_number_file(mem->filename_failcnt, &mem->failcnt); + } +} + +static void cgroup_read_pids_current(struct pids *pids) { + pids->updated = 0; + + if (unlikely(!pids->filename)) + return; + + pids->updated = !read_single_number_file(pids->filename, &pids->pids_current); +} + +static inline void read_cgroup(struct cgroup *cg) { + netdata_log_debug(D_CGROUP, "reading metrics for cgroups '%s'", cg->id); + if (!(cg->options & CGROUP_OPTIONS_IS_UNIFIED)) { + cgroup_read_cpuacct_stat(&cg->cpuacct_stat); + cgroup_read_cpuacct_usage(&cg->cpuacct_usage); + cgroup_read_cpuacct_cpu_stat(&cg->cpuacct_cpu_throttling); + cgroup_read_cpuacct_cpu_shares(&cg->cpuacct_cpu_shares); + cgroup_read_memory(&cg->memory, 0); + cgroup_read_blkio(&cg->io_service_bytes); + cgroup_read_blkio(&cg->io_serviced); + cgroup_read_blkio(&cg->throttle_io_service_bytes); + cgroup_read_blkio(&cg->throttle_io_serviced); + cgroup_read_blkio(&cg->io_merged); + cgroup_read_blkio(&cg->io_queued); + cgroup_read_pids_current(&cg->pids_current); + } else { + cgroup2_read_blkio(&cg->io_service_bytes, 0); + cgroup2_read_blkio(&cg->io_serviced, 4); + cgroup2_read_cpuacct_cpu_stat(&cg->cpuacct_stat, &cg->cpuacct_cpu_throttling); + cgroup_read_cpuacct_cpu_shares(&cg->cpuacct_cpu_shares); + cgroup2_read_pressure(&cg->cpu_pressure); + cgroup2_read_pressure(&cg->io_pressure); + cgroup2_read_pressure(&cg->memory_pressure); + cgroup2_read_pressure(&cg->irq_pressure); + cgroup_read_memory(&cg->memory, 1); + cgroup_read_pids_current(&cg->pids_current); + } +} + +static inline void read_all_discovered_cgroups(struct cgroup *root) { + netdata_log_debug(D_CGROUP, "reading metrics for all cgroups"); + + struct cgroup *cg; + for (cg = root; cg; cg = cg->next) { + if (cg->enabled && !cg->pending_renames) { + read_cgroup(cg); + } + } +} + +// update CPU and memory limits + +static inline void update_cpu_limits(char **filename, unsigned long long *value, struct cgroup *cg) { + if(*filename) { + int ret = -1; + + if(value == &cg->cpuset_cpus) { + unsigned long ncpus = os_read_cpuset_cpus(*filename, os_get_system_cpus()); + if(ncpus) { + *value = ncpus; + ret = 0; + } + } + else if(value == &cg->cpu_cfs_period || value == &cg->cpu_cfs_quota) { + ret = read_single_number_file(*filename, value); + } + else ret = -1; + + if(ret) { + collector_error("Cannot refresh cgroup %s cpu limit by reading '%s'. Will not update its limit anymore.", cg->id, *filename); + freez(*filename); + *filename = NULL; + } + } +} + +static inline void update_cpu_limits2(struct cgroup *cg) { + if(cg->filename_cpu_cfs_quota){ + static procfile *ff = NULL; + + ff = procfile_reopen(ff, cg->filename_cpu_cfs_quota, NULL, CGROUP_PROCFILE_FLAG); + if(unlikely(!ff)) { + goto cpu_limits2_err; + } + + ff = procfile_readall(ff); + if(unlikely(!ff)) { + goto cpu_limits2_err; + } + + unsigned long lines = procfile_lines(ff); + + if (unlikely(lines < 1)) { + collector_error("CGROUP: file '%s' should have 1 lines.", cg->filename_cpu_cfs_quota); + return; + } + + cg->cpu_cfs_period = str2ull(procfile_lineword(ff, 0, 1), NULL); + cg->cpuset_cpus = os_get_system_cpus(); + + char *s = "max\n\0"; + if(strcmp(s, procfile_lineword(ff, 0, 0)) == 0){ + cg->cpu_cfs_quota = cg->cpu_cfs_period * cg->cpuset_cpus; + } else { + cg->cpu_cfs_quota = str2ull(procfile_lineword(ff, 0, 0), NULL); + } + netdata_log_debug(D_CGROUP, "CPU limits values: %llu %llu %llu", cg->cpu_cfs_period, cg->cpuset_cpus, cg->cpu_cfs_quota); + return; + +cpu_limits2_err: + collector_error("Cannot refresh cgroup %s cpu limit by reading '%s'. Will not update its limit anymore.", cg->id, cg->filename_cpu_cfs_quota); + freez(cg->filename_cpu_cfs_quota); + cg->filename_cpu_cfs_quota = NULL; + + } +} + +static inline int update_memory_limits(struct cgroup *cg) { + char **filename = &cg->filename_memory_limit; + const RRDVAR_ACQUIRED **chart_var = &cg->chart_var_memory_limit; + unsigned long long *value = &cg->memory_limit; + + if(*filename) { + if(unlikely(!*chart_var)) { + *chart_var = rrdvar_chart_variable_add_and_acquire(cg->st_mem_usage, "memory_limit"); + if(!*chart_var) { + collector_error("Cannot create cgroup %s chart variable '%s'. Will not update its limit anymore.", cg->id, "memory_limit"); + freez(*filename); + *filename = NULL; + } + } + + if(*filename && *chart_var) { + if(!(cg->options & CGROUP_OPTIONS_IS_UNIFIED)) { + if(read_single_number_file(*filename, value)) { + collector_error("Cannot refresh cgroup %s memory limit by reading '%s'. Will not update its limit anymore.", cg->id, *filename); + freez(*filename); + *filename = NULL; + } + else { + rrdvar_chart_variable_set( + cg->st_mem_usage, *chart_var, (NETDATA_DOUBLE)(*value) / (1024.0 * 1024.0)); + return 1; + } + } else { + char buffer[32]; + int ret = read_txt_file(*filename, buffer, sizeof(buffer)); + if(ret) { + collector_error("Cannot refresh cgroup %s memory limit by reading '%s'. Will not update its limit anymore.", cg->id, *filename); + freez(*filename); + *filename = NULL; + return 0; + } + char *s = "max\n\0"; + if(strcmp(s, buffer) == 0){ + *value = UINT64_MAX; + rrdvar_chart_variable_set( + cg->st_mem_usage, *chart_var, (NETDATA_DOUBLE)(*value) / (1024.0 * 1024.0)); + return 1; + } + *value = str2ull(buffer, NULL); + rrdvar_chart_variable_set(cg->st_mem_usage, *chart_var, (NETDATA_DOUBLE)(*value) / (1024.0 * 1024.0)); + return 1; + } + } + } + return 0; +} + +// ---------------------------------------------------------------------------- +// generate charts + +void update_cgroup_systemd_services_charts() { + for (struct cgroup *cg = cgroup_root; cg; cg = cg->next) { + if (unlikely(!cg->enabled || cg->pending_renames || !is_cgroup_systemd_service(cg))) + continue; + + if (likely(cg->cpuacct_stat.updated)) { + update_cpu_utilization_chart(cg); + } + if (likely(cg->memory.updated_msw_usage_in_bytes)) { + update_mem_usage_chart(cg); + } + if (likely(cg->memory.updated_failcnt)) { + update_mem_failcnt_chart(cg); + } + if (likely(cg->memory.updated_detailed)) { + update_mem_usage_detailed_chart(cg); + update_mem_writeback_chart(cg); + update_mem_pgfaults_chart(cg); + if (!(cg->options & CGROUP_OPTIONS_IS_UNIFIED)) { + update_mem_activity_chart(cg); + } + } + if (likely(cg->io_service_bytes.updated)) { + update_io_serviced_bytes_chart(cg); + } + if (likely(cg->io_serviced.updated)) { + update_io_serviced_ops_chart(cg); + } + if (likely(cg->throttle_io_service_bytes.updated)) { + update_throttle_io_serviced_bytes_chart(cg); + } + if (likely(cg->throttle_io_serviced.updated)) { + update_throttle_io_serviced_ops_chart(cg); + } + if (likely(cg->io_queued.updated)) { + update_io_queued_ops_chart(cg); + } + if (likely(cg->io_merged.updated)) { + update_io_merged_ops_chart(cg); + } + + if (likely(cg->pids_current.updated)) { + update_pids_current_chart(cg); + } + + cg->function_ready = true; + } +} + +void update_cgroup_charts() { + for (struct cgroup *cg = cgroup_root; cg; cg = cg->next) { + if (unlikely(!cg->enabled || cg->pending_renames || is_cgroup_systemd_service(cg))) + continue; + + if (likely(cg->cpuacct_stat.updated)) { + update_cpu_utilization_chart(cg); + + if (likely(cg->filename_cpuset_cpus || cg->filename_cpu_cfs_period || cg->filename_cpu_cfs_quota)) { + if (!(cg->options & CGROUP_OPTIONS_IS_UNIFIED)) { + update_cpu_limits(&cg->filename_cpuset_cpus, &cg->cpuset_cpus, cg); + update_cpu_limits(&cg->filename_cpu_cfs_period, &cg->cpu_cfs_period, cg); + update_cpu_limits(&cg->filename_cpu_cfs_quota, &cg->cpu_cfs_quota, cg); + } else { + update_cpu_limits2(cg); + } + + if (unlikely(!cg->chart_var_cpu_limit)) { + cg->chart_var_cpu_limit = rrdvar_chart_variable_add_and_acquire(cg->st_cpu, "cpu_limit"); + if (!cg->chart_var_cpu_limit) { + collector_error( + "Cannot create cgroup %s chart variable 'cpu_limit'. Will not update its limit anymore.", + cg->id); + if (cg->filename_cpuset_cpus) + freez(cg->filename_cpuset_cpus); + cg->filename_cpuset_cpus = NULL; + if (cg->filename_cpu_cfs_period) + freez(cg->filename_cpu_cfs_period); + cg->filename_cpu_cfs_period = NULL; + if (cg->filename_cpu_cfs_quota) + freez(cg->filename_cpu_cfs_quota); + cg->filename_cpu_cfs_quota = NULL; + } + } else { + NETDATA_DOUBLE value = 0, quota = 0; + + if (likely( + ((!(cg->options & CGROUP_OPTIONS_IS_UNIFIED)) && + (cg->filename_cpuset_cpus || + (cg->filename_cpu_cfs_period && cg->filename_cpu_cfs_quota))) || + ((cg->options & CGROUP_OPTIONS_IS_UNIFIED) && cg->filename_cpu_cfs_quota))) { + if (unlikely(cg->cpu_cfs_quota > 0)) + quota = (NETDATA_DOUBLE)cg->cpu_cfs_quota / (NETDATA_DOUBLE)cg->cpu_cfs_period; + + if (unlikely(quota > 0 && quota < cg->cpuset_cpus)) + value = quota * 100; + else + value = (NETDATA_DOUBLE)cg->cpuset_cpus * 100; + } + if (likely(value)) { + update_cpu_utilization_limit_chart(cg, value); + } else { + if (unlikely(cg->st_cpu_limit)) { + rrdset_is_obsolete___safe_from_collector_thread(cg->st_cpu_limit); + cg->st_cpu_limit = NULL; + } + rrdvar_chart_variable_set(cg->st_cpu, cg->chart_var_cpu_limit, NAN); + } + } + } + } + + if (likely(cg->cpuacct_cpu_throttling.updated)) { + update_cpu_throttled_chart(cg); + update_cpu_throttled_duration_chart(cg); + } + + if (unlikely(cg->cpuacct_cpu_shares.updated)) { + update_cpu_shares_chart(cg); + } + + if (likely(cg->cpuacct_usage.updated)) { + update_cpu_per_core_usage_chart(cg); + } + + if (likely(cg->memory.updated_detailed)) { + update_mem_usage_detailed_chart(cg); + update_mem_writeback_chart(cg); + + if(!(cg->options & CGROUP_OPTIONS_IS_UNIFIED)) { + update_mem_activity_chart(cg); + } + + update_mem_pgfaults_chart(cg); + } + + if (likely(cg->memory.updated_usage_in_bytes)) { + update_mem_usage_chart(cg); + + // FIXME: this "if" should be only for unlimited charts + if (likely(host_ram_total)) { + // FIXME: do we need to update mem limits on every data collection? + if (likely(update_memory_limits(cg))) { + unsigned long long memory_limit = host_ram_total; + if (unlikely(cg->memory_limit < host_ram_total)) + memory_limit = cg->memory_limit; + + update_mem_usage_limit_chart(cg, memory_limit); + update_mem_utilization_chart(cg, memory_limit); + } else { + if (unlikely(cg->st_mem_usage_limit)) { + rrdset_is_obsolete___safe_from_collector_thread(cg->st_mem_usage_limit); + cg->st_mem_usage_limit = NULL; + } + + if (unlikely(cg->st_mem_utilization)) { + rrdset_is_obsolete___safe_from_collector_thread(cg->st_mem_utilization); + cg->st_mem_utilization = NULL; + } + } + } + } + + if (likely(cg->memory.updated_failcnt)) { + update_mem_failcnt_chart(cg); + } + + if (likely(cg->io_service_bytes.updated)) { + update_io_serviced_bytes_chart(cg); + } + + if (likely(cg->io_serviced.updated)) { + update_io_serviced_ops_chart(cg); + } + + if (likely(cg->throttle_io_service_bytes.updated)) { + update_throttle_io_serviced_bytes_chart(cg); + } + + if (likely(cg->throttle_io_serviced.updated)) { + update_throttle_io_serviced_ops_chart(cg); + } + + if (likely(cg->io_queued.updated)) { + update_io_queued_ops_chart(cg); + } + + if (likely(cg->io_merged.updated)) { + update_io_merged_ops_chart(cg); + } + + if (likely(cg->pids_current.updated)) { + update_pids_current_chart(cg); + } + + if (cg->options & CGROUP_OPTIONS_IS_UNIFIED) { + if (likely(cg->cpu_pressure.updated)) { + if (cg->cpu_pressure.some.available) { + update_cpu_some_pressure_chart(cg); + update_cpu_some_pressure_stall_time_chart(cg); + } + if (cg->cpu_pressure.full.available) { + update_cpu_full_pressure_chart(cg); + update_cpu_full_pressure_stall_time_chart(cg); + } + } + + if (likely(cg->memory_pressure.updated)) { + if (cg->memory_pressure.some.available) { + update_mem_some_pressure_chart(cg); + update_mem_some_pressure_stall_time_chart(cg); + } + if (cg->memory_pressure.full.available) { + update_mem_full_pressure_chart(cg); + update_mem_full_pressure_stall_time_chart(cg); + } + } + + if (likely(cg->irq_pressure.updated)) { + if (cg->irq_pressure.some.available) { + update_irq_some_pressure_chart(cg); + update_irq_some_pressure_stall_time_chart(cg); + } + if (cg->irq_pressure.full.available) { + update_irq_full_pressure_chart(cg); + update_irq_full_pressure_stall_time_chart(cg); + } + } + + if (likely(cg->io_pressure.updated)) { + if (cg->io_pressure.some.available) { + update_io_some_pressure_chart(cg); + update_io_some_pressure_stall_time_chart(cg); + } + if (cg->io_pressure.full.available) { + update_io_full_pressure_chart(cg); + update_io_full_pressure_stall_time_chart(cg); + } + } + } + + cg->function_ready = true; + } +} + +// ---------------------------------------------------------------------------- +// cgroups main + +static void cgroup_main_cleanup(void *pptr) { + struct netdata_static_thread *static_thread = CLEANUP_FUNCTION_GET_PTR(pptr); + if(!static_thread) return; + + static_thread->enabled = NETDATA_MAIN_THREAD_EXITING; + + collector_info("cleaning up..."); + worker_unregister(); + + usec_t max = 2 * USEC_PER_SEC, step = 50000; + + if (!__atomic_load_n(&discovery_thread.exited, __ATOMIC_RELAXED)) { + collector_info("waiting for discovery thread to finish..."); + while (!__atomic_load_n(&discovery_thread.exited, __ATOMIC_RELAXED) && max > 0) { + uv_mutex_lock(&discovery_thread.mutex); + uv_cond_signal(&discovery_thread.cond_var); + uv_mutex_unlock(&discovery_thread.mutex); + max -= step; + sleep_usec(step); + } + } + + static_thread->enabled = NETDATA_MAIN_THREAD_EXITED; +} + +void cgroup_read_host_total_ram() { + procfile *ff = NULL; + char filename[FILENAME_MAX + 1]; + + snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, "/proc/meminfo"); + ff = procfile_open(filename, " \t:", PROCFILE_FLAG_DEFAULT); + + if (likely((ff = procfile_readall(ff)) && procfile_lines(ff) && !strncmp(procfile_word(ff, 0), "MemTotal", 8))) + host_ram_total = str2ull(procfile_word(ff, 1), NULL) * 1024; + else + collector_error("Cannot read file %s. Will not create RAM limit charts.", filename); + + procfile_close(ff); +} + +void *cgroups_main(void *ptr) { + CLEANUP_FUNCTION_REGISTER(cgroup_main_cleanup) cleanup_ptr = ptr; + + worker_register("CGROUPS"); + worker_register_job_name(WORKER_CGROUPS_LOCK, "lock"); + worker_register_job_name(WORKER_CGROUPS_READ, "read"); + worker_register_job_name(WORKER_CGROUPS_CHART, "chart"); + + if (getenv("KUBERNETES_SERVICE_HOST") != NULL && getenv("KUBERNETES_SERVICE_PORT") != NULL) { + is_inside_k8s = true; + cgroup_enable_cpuacct_cpu_shares = true; + } + + read_cgroup_plugin_configuration(); + + cgroup_read_host_total_ram(); + + if (uv_mutex_init(&cgroup_root_mutex)) { + collector_error("CGROUP: cannot initialize mutex for the main cgroup list"); + goto exit; + } + + discovery_thread.exited = 0; + + if (uv_mutex_init(&discovery_thread.mutex)) { + collector_error("CGROUP: cannot initialize mutex for discovery thread"); + goto exit; + } + if (uv_cond_init(&discovery_thread.cond_var)) { + collector_error("CGROUP: cannot initialize conditional variable for discovery thread"); + goto exit; + } + + int error = uv_thread_create(&discovery_thread.thread, cgroup_discovery_worker, NULL); + if (error) { + collector_error("CGROUP: cannot create thread worker. uv_thread_create(): %s", uv_strerror(error)); + goto exit; + } + + // we register this only on localhost + // for the other nodes, the origin server should register it + cgroup_netdev_link_init(); + + rrd_function_add_inline(localhost, NULL, "containers-vms", 10, + RRDFUNCTIONS_PRIORITY_DEFAULT / 2, RRDFUNCTIONS_CGTOP_HELP, + "top", HTTP_ACCESS_ANONYMOUS_DATA, + cgroup_function_cgroup_top); + + rrd_function_add_inline(localhost, NULL, "systemd-services", 10, + RRDFUNCTIONS_PRIORITY_DEFAULT / 3, RRDFUNCTIONS_SYSTEMD_SERVICES_HELP, + "top", HTTP_ACCESS_ANONYMOUS_DATA, + cgroup_function_systemd_top); + + heartbeat_t hb; + heartbeat_init(&hb); + usec_t step = cgroup_update_every * USEC_PER_SEC; + usec_t find_every = cgroup_check_for_new_every * USEC_PER_SEC, find_dt = 0; + + while(service_running(SERVICE_COLLECTORS)) { + worker_is_idle(); + + usec_t hb_dt = heartbeat_next(&hb, step); + + if (unlikely(!service_running(SERVICE_COLLECTORS))) + break; + + find_dt += hb_dt; + if (unlikely(find_dt >= find_every || (!is_inside_k8s && cgroups_check))) { + uv_mutex_lock(&discovery_thread.mutex); + uv_cond_signal(&discovery_thread.cond_var); + uv_mutex_unlock(&discovery_thread.mutex); + find_dt = 0; + cgroups_check = 0; + } + + worker_is_busy(WORKER_CGROUPS_LOCK); + uv_mutex_lock(&cgroup_root_mutex); + + worker_is_busy(WORKER_CGROUPS_READ); + read_all_discovered_cgroups(cgroup_root); + + if (unlikely(!service_running(SERVICE_COLLECTORS))) { + uv_mutex_unlock(&cgroup_root_mutex); + break; + } + + worker_is_busy(WORKER_CGROUPS_CHART); + + update_cgroup_charts(); + update_cgroup_systemd_services_charts(); + + if (unlikely(!service_running(SERVICE_COLLECTORS))) { + uv_mutex_unlock(&cgroup_root_mutex); + break; + } + + worker_is_idle(); + uv_mutex_unlock(&cgroup_root_mutex); + } + +exit: + return NULL; +} |