diff options
Diffstat (limited to 'src/collectors/cgroups.plugin/sys_fs_cgroup.c')
| -rw-r--r-- | src/collectors/cgroups.plugin/sys_fs_cgroup.c | 1740 |
1 files changed, 1740 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 0000000000..100b0912de --- /dev/null +++ b/src/collectors/cgroups.plugin/sys_fs_cgroup.c @@ -0,0 +1,1740 @@ +// 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; +int is_inside_k8s = 0; +long system_page_size = 4096; // system will be queried via sysconf() in configuration() +int cgroup_enable_cpuacct_stat = CONFIG_BOOLEAN_AUTO; +int cgroup_enable_cpuacct_usage = CONFIG_BOOLEAN_NO; +int cgroup_enable_cpuacct_cpu_throttling = CONFIG_BOOLEAN_YES; +int cgroup_enable_cpuacct_cpu_shares = CONFIG_BOOLEAN_NO; +int cgroup_enable_memory = CONFIG_BOOLEAN_AUTO; +int cgroup_enable_detailed_memory = CONFIG_BOOLEAN_AUTO; +int cgroup_enable_memory_failcnt = CONFIG_BOOLEAN_AUTO; +int cgroup_enable_swap = CONFIG_BOOLEAN_AUTO; +int cgroup_enable_blkio_io = CONFIG_BOOLEAN_AUTO; +int cgroup_enable_blkio_ops = CONFIG_BOOLEAN_AUTO; +int cgroup_enable_blkio_throttle_io = CONFIG_BOOLEAN_AUTO; +int cgroup_enable_blkio_throttle_ops = CONFIG_BOOLEAN_AUTO; +int cgroup_enable_blkio_merged_ops = CONFIG_BOOLEAN_AUTO; +int cgroup_enable_blkio_queued_ops = CONFIG_BOOLEAN_AUTO; +int cgroup_enable_pressure_cpu = CONFIG_BOOLEAN_AUTO; +int cgroup_enable_pressure_io_some = CONFIG_BOOLEAN_AUTO; +int cgroup_enable_pressure_io_full = CONFIG_BOOLEAN_AUTO; +int cgroup_enable_pressure_memory_some = CONFIG_BOOLEAN_AUTO; +int cgroup_enable_pressure_memory_full = CONFIG_BOOLEAN_AUTO; +int cgroup_enable_pressure_irq_some = CONFIG_BOOLEAN_NO; +int cgroup_enable_pressure_irq_full = CONFIG_BOOLEAN_AUTO; +int cgroup_enable_systemd_services = CONFIG_BOOLEAN_YES; +int cgroup_enable_systemd_services_detailed_memory = CONFIG_BOOLEAN_NO; +int cgroup_used_memory = CONFIG_BOOLEAN_YES; +int cgroup_use_unified_cgroups = CONFIG_BOOLEAN_NO; +int cgroup_unified_exist = CONFIG_BOOLEAN_AUTO; +int cgroup_search_in_devices = 1; +int cgroup_check_for_new_every = 10; +int cgroup_update_every = 1; +int cgroup_containers_chart_priority = NETDATA_CHART_PRIO_CGROUPS_CONTAINERS; +int cgroup_recheck_zero_blkio_every_iterations = 10; +int cgroup_recheck_zero_mem_failcnt_every_iterations = 10; +int cgroup_recheck_zero_mem_detailed_every_iterations = 10; +char *cgroup_cpuacct_base = NULL; +char *cgroup_cpuset_base = NULL; +char *cgroup_blkio_base = NULL; +char *cgroup_memory_base = NULL; +char *cgroup_devices_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 }, +}; + +// Shared memory with information from detected cgroups +netdata_ebpf_cgroup_shm_t shm_cgroup_ebpf = {NULL, NULL}; +int shm_fd_cgroup_ebpf = -1; +sem_t *shm_mutex_cgroup_ebpf = SEM_FAILED; + +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; + + fd_set rfds; + struct timeval timeout; + int fd = fileno(fp_child_output); + int ret = -1; + + FD_ZERO(&rfds); + FD_SET(fd, &rfds); + timeout.tv_sec = 3; + timeout.tv_usec = 0; + + if (fd != -1) { + ret = select(fd + 1, &rfds, NULL, NULL, &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 %"PRId64" seconds", exec, (int64_t)timeout.tv_sec); + } 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"); + + cgroup_containers_chart_priority = (int)config_get_number("plugin:cgroups", "containers priority", cgroup_containers_chart_priority); + if(cgroup_containers_chart_priority < 1) + cgroup_containers_chart_priority = NETDATA_CHART_PRIO_CGROUPS_CONTAINERS; + + cgroup_enable_cpuacct_stat = config_get_boolean_ondemand("plugin:cgroups", "enable cpuacct stat (total CPU)", cgroup_enable_cpuacct_stat); + cgroup_enable_cpuacct_usage = config_get_boolean_ondemand("plugin:cgroups", "enable cpuacct usage (per core CPU)", cgroup_enable_cpuacct_usage); + cgroup_enable_cpuacct_cpu_throttling = config_get_boolean_ondemand("plugin:cgroups", "enable cpuacct cpu throttling", cgroup_enable_cpuacct_cpu_throttling); + cgroup_enable_cpuacct_cpu_shares = config_get_boolean_ondemand("plugin:cgroups", "enable cpuacct cpu shares", cgroup_enable_cpuacct_cpu_shares); + + cgroup_enable_memory = config_get_boolean_ondemand("plugin:cgroups", "enable memory", cgroup_enable_memory); + cgroup_enable_detailed_memory = config_get_boolean_ondemand("plugin:cgroups", "enable detailed memory", cgroup_enable_detailed_memory); + cgroup_enable_memory_failcnt = config_get_boolean_ondemand("plugin:cgroups", "enable memory limits fail count", cgroup_enable_memory_failcnt); + cgroup_enable_swap = config_get_boolean_ondemand("plugin:cgroups", "enable swap memory", cgroup_enable_swap); + + cgroup_enable_blkio_io = config_get_boolean_ondemand("plugin:cgroups", "enable blkio bandwidth", cgroup_enable_blkio_io); + cgroup_enable_blkio_ops = config_get_boolean_ondemand("plugin:cgroups", "enable blkio operations", cgroup_enable_blkio_ops); + cgroup_enable_blkio_throttle_io = config_get_boolean_ondemand("plugin:cgroups", "enable blkio throttle bandwidth", cgroup_enable_blkio_throttle_io); + cgroup_enable_blkio_throttle_ops = config_get_boolean_ondemand("plugin:cgroups", "enable blkio throttle operations", cgroup_enable_blkio_throttle_ops); + cgroup_enable_blkio_queued_ops = config_get_boolean_ondemand("plugin:cgroups", "enable blkio queued operations", cgroup_enable_blkio_queued_ops); + cgroup_enable_blkio_merged_ops = config_get_boolean_ondemand("plugin:cgroups", "enable blkio merged operations", cgroup_enable_blkio_merged_ops); + + cgroup_enable_pressure_cpu = config_get_boolean_ondemand("plugin:cgroups", "enable cpu pressure", cgroup_enable_pressure_cpu); + cgroup_enable_pressure_io_some = config_get_boolean_ondemand("plugin:cgroups", "enable io some pressure", cgroup_enable_pressure_io_some); + cgroup_enable_pressure_io_full = config_get_boolean_ondemand("plugin:cgroups", "enable io full pressure", cgroup_enable_pressure_io_full); + cgroup_enable_pressure_memory_some = config_get_boolean_ondemand("plugin:cgroups", "enable memory some pressure", cgroup_enable_pressure_memory_some); + cgroup_enable_pressure_memory_full = config_get_boolean_ondemand("plugin:cgroups", "enable memory full pressure", cgroup_enable_pressure_memory_full); + + cgroup_recheck_zero_blkio_every_iterations = (int)config_get_number("plugin:cgroups", "recheck zero blkio every iterations", cgroup_recheck_zero_blkio_every_iterations); + cgroup_recheck_zero_mem_failcnt_every_iterations = (int)config_get_number("plugin:cgroups", "recheck zero memory failcnt every iterations", cgroup_recheck_zero_mem_failcnt_every_iterations); + cgroup_recheck_zero_mem_detailed_every_iterations = (int)config_get_number("plugin:cgroups", "recheck zero detailed memory every iterations", cgroup_recheck_zero_mem_detailed_every_iterations); + + cgroup_enable_systemd_services = config_get_boolean("plugin:cgroups", "enable systemd services", cgroup_enable_systemd_services); + cgroup_enable_systemd_services_detailed_memory = config_get_boolean("plugin:cgroups", "enable systemd services detailed memory", cgroup_enable_systemd_services_detailed_memory); + cgroup_used_memory = config_get_boolean("plugin:cgroups", "report used memory", cgroup_used_memory); + + char filename[FILENAME_MAX + 1], *s; + struct mountinfo *mi, *root = mountinfo_read(0); + if(!cgroup_use_unified_cgroups) { + // cgroup v1 does not have pressure metrics + cgroup_enable_pressure_cpu = + cgroup_enable_pressure_io_some = + cgroup_enable_pressure_io_full = + cgroup_enable_pressure_memory_some = + cgroup_enable_pressure_memory_full = CONFIG_BOOLEAN_NO; + + 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 = config_get("plugin:cgroups", "path to /sys/fs/cgroup/cpuacct", 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 = config_get("plugin:cgroups", "path to /sys/fs/cgroup/cpuset", 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 = config_get("plugin:cgroups", "path to /sys/fs/cgroup/blkio", 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 = config_get("plugin:cgroups", "path to /sys/fs/cgroup/memory", filename); + + mi = mountinfo_find_by_filesystem_super_option(root, "cgroup", "devices"); + if (!mi) + mi = mountinfo_find_by_filesystem_mount_source(root, "cgroup", "devices"); + if (!mi) { + collector_error("CGROUP: cannot find devices mountinfo. Assuming default: /sys/fs/cgroup/devices"); + s = "/sys/fs/cgroup/devices"; + } else + s = mi->mount_point; + set_cgroup_base_path(filename, s); + cgroup_devices_base = config_get("plugin:cgroups", "path to /sys/fs/cgroup/devices", 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 = config_get("plugin:cgroups", "path to /sys/fs/cgroup/pids", filename); + } + else { + //cgroup_enable_cpuacct_stat = + cgroup_enable_cpuacct_usage = + //cgroup_enable_memory = + //cgroup_enable_detailed_memory = + cgroup_enable_memory_failcnt = + //cgroup_enable_swap = + //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; + cgroup_search_in_devices = 0; + cgroup_enable_systemd_services_detailed_memory = CONFIG_BOOLEAN_NO; + cgroup_used_memory = CONFIG_BOOLEAN_NO; //unified cgroups use different values + + //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 = config_get("plugin:cgroups", "path to unified cgroups", 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); + + if(cgroup_enable_systemd_services) { + 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); +} + +void netdata_cgroup_ebpf_set_values(size_t length) +{ + sem_wait(shm_mutex_cgroup_ebpf); + + shm_cgroup_ebpf.header->cgroup_max = cgroup_root_max; + shm_cgroup_ebpf.header->systemd_enabled = cgroup_enable_systemd_services | + cgroup_enable_systemd_services_detailed_memory | + cgroup_used_memory; + shm_cgroup_ebpf.header->body_length = length; + + sem_post(shm_mutex_cgroup_ebpf); +} + +void netdata_cgroup_ebpf_initialize_shm() +{ + shm_fd_cgroup_ebpf = shm_open(NETDATA_SHARED_MEMORY_EBPF_CGROUP_NAME, O_CREAT | O_RDWR, 0660); + if (shm_fd_cgroup_ebpf < 0) { + collector_error("Cannot initialize shared memory used by cgroup and eBPF, integration won't happen."); + return; + } + + size_t length = sizeof(netdata_ebpf_cgroup_shm_header_t) + cgroup_root_max * sizeof(netdata_ebpf_cgroup_shm_body_t); + if (ftruncate(shm_fd_cgroup_ebpf, length)) { + collector_error("Cannot set size for shared memory."); + goto end_init_shm; + } + + shm_cgroup_ebpf.header = (netdata_ebpf_cgroup_shm_header_t *) mmap(NULL, length, + PROT_READ | PROT_WRITE, MAP_SHARED, + shm_fd_cgroup_ebpf, 0); + + if (unlikely(MAP_FAILED == shm_cgroup_ebpf.header)) { + shm_cgroup_ebpf.header = NULL; + collector_error("Cannot map shared memory used between cgroup and eBPF, integration won't happen"); + goto end_init_shm; + } + shm_cgroup_ebpf.body = (netdata_ebpf_cgroup_shm_body_t *) ((char *)shm_cgroup_ebpf.header + + sizeof(netdata_ebpf_cgroup_shm_header_t)); + + shm_mutex_cgroup_ebpf = sem_open(NETDATA_NAMED_SEMAPHORE_EBPF_CGROUP_NAME, O_CREAT, + S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH, 1); + + if (shm_mutex_cgroup_ebpf != SEM_FAILED) { + netdata_cgroup_ebpf_set_values(length); + return; + } + + collector_error("Cannot create semaphore, integration between eBPF and cgroup won't happen"); + munmap(shm_cgroup_ebpf.header, length); + shm_cgroup_ebpf.header = NULL; + +end_init_shm: + close(shm_fd_cgroup_ebpf); + shm_fd_cgroup_ebpf = -1; + shm_unlink(NETDATA_SHARED_MEMORY_EBPF_CGROUP_NAME); +} + +// --------------------------------------------------------------------------------------------- + +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; + + if(unlikely(cp->enabled == CONFIG_BOOLEAN_AUTO && + (cp->user || cp->system || netdata_zero_metrics_enabled == CONFIG_BOOLEAN_YES))) + cp->enabled = CONFIG_BOOLEAN_YES; + } +} + +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; + + if (unlikely(cp->enabled == CONFIG_BOOLEAN_AUTO)) { + if (likely( + cp->nr_periods || cp->nr_throttled || cp->throttled_time || + netdata_zero_metrics_enabled == CONFIG_BOOLEAN_YES)) { + cp->enabled = CONFIG_BOOLEAN_YES; + } + } +} + +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; + + if (unlikely(cp->enabled == CONFIG_BOOLEAN_AUTO)) { + if (likely(cp->user || cp->system || netdata_zero_metrics_enabled == CONFIG_BOOLEAN_YES)) { + cp->enabled = CONFIG_BOOLEAN_YES; + } + } + if (unlikely(cpt->enabled == CONFIG_BOOLEAN_AUTO)) { + if (likely( + cpt->nr_periods || cpt->nr_throttled || cpt->throttled_time || + netdata_zero_metrics_enabled == CONFIG_BOOLEAN_YES)) { + cpt->enabled = CONFIG_BOOLEAN_YES; + } + } +} + +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; + if (unlikely((cp->enabled == CONFIG_BOOLEAN_AUTO)) && + (cp->shares || netdata_zero_metrics_enabled == CONFIG_BOOLEAN_YES)) { + cp->enabled = CONFIG_BOOLEAN_YES; + } +} + +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 |