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sys_fs_cgroup.c
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sys_fs_cgroup.c
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// SPDX-License-Identifier: GPL-3.0-or-later
#include "sys_fs_cgroup.h"
#define PLUGIN_CGROUPS_NAME "cgroups.plugin"
#define PLUGIN_CGROUPS_MODULE_SYSTEMD_NAME "systemd"
#define PLUGIN_CGROUPS_MODULE_CGROUPS_NAME "/sys/fs/cgroup"
// ----------------------------------------------------------------------------
// cgroup globals
static long system_page_size = 4096; // system will be queried via sysconf() in configuration()
static int cgroup_enable_cpuacct_stat = CONFIG_BOOLEAN_AUTO;
static int cgroup_enable_cpuacct_usage = CONFIG_BOOLEAN_AUTO;
static int cgroup_enable_memory = CONFIG_BOOLEAN_AUTO;
static int cgroup_enable_detailed_memory = CONFIG_BOOLEAN_AUTO;
static int cgroup_enable_memory_failcnt = CONFIG_BOOLEAN_AUTO;
static int cgroup_enable_swap = CONFIG_BOOLEAN_AUTO;
static int cgroup_enable_blkio_io = CONFIG_BOOLEAN_AUTO;
static int cgroup_enable_blkio_ops = CONFIG_BOOLEAN_AUTO;
static int cgroup_enable_blkio_throttle_io = CONFIG_BOOLEAN_AUTO;
static int cgroup_enable_blkio_throttle_ops = CONFIG_BOOLEAN_AUTO;
static int cgroup_enable_blkio_merged_ops = CONFIG_BOOLEAN_AUTO;
static int cgroup_enable_blkio_queued_ops = CONFIG_BOOLEAN_AUTO;
static int cgroup_enable_systemd_services = CONFIG_BOOLEAN_YES;
static int cgroup_enable_systemd_services_detailed_memory = CONFIG_BOOLEAN_NO;
static int cgroup_used_memory_without_cache = CONFIG_BOOLEAN_YES;
static int cgroup_search_in_devices = 1;
static int cgroup_enable_new_cgroups_detected_at_runtime = 1;
static int cgroup_check_for_new_every = 10;
static int cgroup_update_every = 1;
static int cgroup_recheck_zero_blkio_every_iterations = 10;
static int cgroup_recheck_zero_mem_failcnt_every_iterations = 10;
static int cgroup_recheck_zero_mem_detailed_every_iterations = 10;
static char *cgroup_cpuacct_base = NULL;
static char *cgroup_blkio_base = NULL;
static char *cgroup_memory_base = NULL;
static char *cgroup_devices_base = NULL;
static int cgroup_root_count = 0;
static int cgroup_root_max = 1000;
static int cgroup_max_depth = 0;
static SIMPLE_PATTERN *enabled_cgroup_patterns = NULL;
static SIMPLE_PATTERN *enabled_cgroup_paths = NULL;
static SIMPLE_PATTERN *enabled_cgroup_renames = NULL;
static SIMPLE_PATTERN *systemd_services_cgroups = NULL;
static char *cgroups_rename_script = NULL;
static char *cgroups_network_interface_script = NULL;
static int cgroups_check = 0;
static uint32_t Read_hash = 0;
static uint32_t Write_hash = 0;
static uint32_t user_hash = 0;
static uint32_t system_hash = 0;
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");
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", (long long)cgroup_check_for_new_every * (long long)cgroup_update_every);
if(cgroup_check_for_new_every < cgroup_update_every)
cgroup_check_for_new_every = cgroup_update_every;
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_memory = config_get_boolean_ondemand("plugin:cgroups", "enable memory (used mem including cache)", 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_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_without_cache = config_get_boolean("plugin:cgroups", "report used memory without cache", cgroup_used_memory_without_cache);
char filename[FILENAME_MAX + 1], *s;
struct mountinfo *mi, *root = mountinfo_read(0);
mi = mountinfo_find_by_filesystem_super_option(root, "cgroup", "cpuacct");
if(!mi) mi = mountinfo_find_by_filesystem_mount_source(root, "cgroup", "cpuacct");
if(!mi) {
error("CGROUP: cannot find cpuacct mountinfo. Assuming default: /sys/fs/cgroup/cpuacct");
s = "/sys/fs/cgroup/cpuacct";
}
else s = mi->mount_point;
snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, s);
cgroup_cpuacct_base = config_get("plugin:cgroups", "path to /sys/fs/cgroup/cpuacct", 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) {
error("CGROUP: cannot find blkio mountinfo. Assuming default: /sys/fs/cgroup/blkio");
s = "/sys/fs/cgroup/blkio";
}
else s = mi->mount_point;
snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, 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) {
error("CGROUP: cannot find memory mountinfo. Assuming default: /sys/fs/cgroup/memory");
s = "/sys/fs/cgroup/memory";
}
else s = mi->mount_point;
snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, 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) {
error("CGROUP: cannot find devices mountinfo. Assuming default: /sys/fs/cgroup/devices");
s = "/sys/fs/cgroup/devices";
}
else s = mi->mount_point;
snprintfz(filename, FILENAME_MAX, "%s%s", netdata_configured_host_prefix, s);
cgroup_devices_base = config_get("plugin:cgroups", "path to /sys/fs/cgroup/devices", 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);
cgroup_enable_new_cgroups_detected_at_runtime = config_get_boolean("plugin:cgroups", "enable new cgroups detected at run time", cgroup_enable_new_cgroups_detected_at_runtime);
enabled_cgroup_patterns = 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
" *.scope " // we need all other *.scope for sure
// ----------------------------------------------------------------
" /machine.slice/*.service " // #3367 systemd-nspawn
// ----------------------------------------------------------------
" !*/vcpu* " // libvirtd adds these sub-cgroups
" !*/emulator " // libvirtd adds these sub-cgroups
" !*.mount "
" !*.partition "
" !*.service "
" !*.socket "
" !*.slice "
" !*.swap "
" !*.user "
" !/ "
" !/docker "
" !/libvirt "
" !/lxc "
" !/lxc/*/* " // #1397 #2649
" !/machine "
" !/qemu "
" !/system "
" !/systemd "
" !/user "
" * " // enable anything else
), NULL, SIMPLE_PATTERN_EXACT);
enabled_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 "
" !/user.slice "
" !/lxc/*/* " // #2161 #2649
" * "
), NULL, SIMPLE_PATTERN_EXACT);
snprintfz(filename, FILENAME_MAX, "%s/cgroup-name.sh", netdata_configured_plugins_dir);
cgroups_rename_script = config_get("plugin:cgroups", "script to get cgroup names", filename);
snprintfz(filename, FILENAME_MAX, "%s/cgroup-network", netdata_configured_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* " // #3396 kubernetes
" *.libvirt-qemu " // #3010
" * "
), NULL, SIMPLE_PATTERN_EXACT);
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);
}
mountinfo_free_all(root);
}
// ----------------------------------------------------------------------------
// cgroup objects
struct blkio {
int updated;
int enabled; // CONFIG_BOOLEAN_YES or CONFIG_BOOLEAN_AUTO
int delay_counter;
char *filename;
unsigned long long Read;
unsigned long long Write;
/*
unsigned long long Sync;
unsigned long long Async;
unsigned long long Total;
*/
};
// https://www.kernel.org/doc/Documentation/cgroup-v1/memory.txt
struct memory {
ARL_BASE *arl_base;
ARL_ENTRY *arl_dirty;
ARL_ENTRY *arl_swap;
int updated_detailed;
int updated_usage_in_bytes;
int updated_msw_usage_in_bytes;
int updated_failcnt;
int enabled_detailed; // CONFIG_BOOLEAN_YES or CONFIG_BOOLEAN_AUTO
int enabled_usage_in_bytes; // CONFIG_BOOLEAN_YES or CONFIG_BOOLEAN_AUTO
int enabled_msw_usage_in_bytes; // CONFIG_BOOLEAN_YES or CONFIG_BOOLEAN_AUTO
int enabled_failcnt; // CONFIG_BOOLEAN_YES or CONFIG_BOOLEAN_AUTO
int delay_counter_detailed;
int delay_counter_failcnt;
char *filename_detailed;
char *filename_usage_in_bytes;
char *filename_msw_usage_in_bytes;
char *filename_failcnt;
int detailed_has_dirty;
int detailed_has_swap;
// detailed metrics
unsigned long long cache;
unsigned long long rss;
unsigned long long rss_huge;
unsigned long long mapped_file;
unsigned long long writeback;
unsigned long long dirty;
unsigned long long swap;
unsigned long long pgpgin;
unsigned long long pgpgout;
unsigned long long pgfault;
unsigned long long pgmajfault;
/*
unsigned long long inactive_anon;
unsigned long long active_anon;
unsigned long long inactive_file;
unsigned long long active_file;
unsigned long long unevictable;
unsigned long long hierarchical_memory_limit;
unsigned long long total_cache;
unsigned long long total_rss;
unsigned long long total_rss_huge;
unsigned long long total_mapped_file;
unsigned long long total_writeback;
unsigned long long total_dirty;
unsigned long long total_swap;
unsigned long long total_pgpgin;
unsigned long long total_pgpgout;
unsigned long long total_pgfault;
unsigned long long total_pgmajfault;
unsigned long long total_inactive_anon;
unsigned long long total_active_anon;
unsigned long long total_inactive_file;
unsigned long long total_active_file;
unsigned long long total_unevictable;
*/
// single file metrics
unsigned long long usage_in_bytes;
unsigned long long msw_usage_in_bytes;
unsigned long long failcnt;
};
// https://www.kernel.org/doc/Documentation/cgroup-v1/cpuacct.txt
struct cpuacct_stat {
int updated;
int enabled; // CONFIG_BOOLEAN_YES or CONFIG_BOOLEAN_AUTO
char *filename;
unsigned long long user;
unsigned long long system;
};
// https://www.kernel.org/doc/Documentation/cgroup-v1/cpuacct.txt
struct cpuacct_usage {
int updated;
int enabled; // CONFIG_BOOLEAN_YES or CONFIG_BOOLEAN_AUTO
char *filename;
unsigned int cpus;
unsigned long long *cpu_percpu;
};
struct cgroup_network_interface {
const char *host_device;
const char *container_device;
struct cgroup_network_interface *next;
};
#define CGROUP_OPTIONS_DISABLED_DUPLICATE 0x00000001
#define CGROUP_OPTIONS_SYSTEM_SLICE_SERVICE 0x00000002
struct cgroup {
uint32_t options;
char available; // found in the filesystem
char enabled; // enabled in the config
char *id;
uint32_t hash;
char *chart_id;
uint32_t hash_chart;
char *chart_title;
struct cpuacct_stat cpuacct_stat;
struct cpuacct_usage cpuacct_usage;
struct memory memory;
struct blkio io_service_bytes; // bytes
struct blkio io_serviced; // operations
struct blkio throttle_io_service_bytes; // bytes
struct blkio throttle_io_serviced; // operations
struct blkio io_merged; // operations
struct blkio io_queued; // operations
struct cgroup_network_interface *interfaces;
// per cgroup charts
RRDSET *st_cpu;
RRDSET *st_cpu_per_core;
RRDSET *st_mem;
RRDSET *st_writeback;
RRDSET *st_mem_activity;
RRDSET *st_pgfaults;
RRDSET *st_mem_usage;
RRDSET *st_mem_failcnt;
RRDSET *st_io;
RRDSET *st_serviced_ops;
RRDSET *st_throttle_io;
RRDSET *st_throttle_serviced_ops;
RRDSET *st_queued_ops;
RRDSET *st_merged_ops;
// services
RRDDIM *rd_cpu;
RRDDIM *rd_mem_usage;
RRDDIM *rd_mem_failcnt;
RRDDIM *rd_swap_usage;
RRDDIM *rd_mem_detailed_cache;
RRDDIM *rd_mem_detailed_rss;
RRDDIM *rd_mem_detailed_mapped;
RRDDIM *rd_mem_detailed_writeback;
RRDDIM *rd_mem_detailed_pgpgin;
RRDDIM *rd_mem_detailed_pgpgout;
RRDDIM *rd_mem_detailed_pgfault;
RRDDIM *rd_mem_detailed_pgmajfault;
RRDDIM *rd_io_service_bytes_read;
RRDDIM *rd_io_serviced_read;
RRDDIM *rd_throttle_io_read;
RRDDIM *rd_throttle_io_serviced_read;
RRDDIM *rd_io_queued_read;
RRDDIM *rd_io_merged_read;
RRDDIM *rd_io_service_bytes_write;
RRDDIM *rd_io_serviced_write;
RRDDIM *rd_throttle_io_write;
RRDDIM *rd_throttle_io_serviced_write;
RRDDIM *rd_io_queued_write;
RRDDIM *rd_io_merged_write;
struct cgroup *next;
} *cgroup_root = NULL;
// ----------------------------------------------------------------------------
// 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, PROCFILE_FLAG_DEFAULT);
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)) {
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));
else if(unlikely(hash == system_hash && !strcmp(s, "system")))
cp->system = str2ull(procfile_lineword(ff, i, 1));
}
cp->updated = 1;
if(unlikely(cp->enabled == CONFIG_BOOLEAN_AUTO && (cp->user || cp->system)))
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, PROCFILE_FLAG_DEFAULT);
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)) {
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));
ca->cpu_percpu[i] = n;
total += n;
}
ca->updated = 1;
if(unlikely(ca->enabled == CONFIG_BOOLEAN_AUTO && total))
ca->enabled = CONFIG_BOOLEAN_YES;
}
}
static inline void cgroup_read_blkio(struct blkio *io) {
if(unlikely(io->enabled == CONFIG_BOOLEAN_AUTO && io->delay_counter > 0)) {
io->delay_counter--;
return;
}
if(likely(io->filename)) {
static procfile *ff = NULL;
ff = procfile_reopen(ff, io->filename, NULL, PROCFILE_FLAG_DEFAULT);
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)) {
error("CGROUP: file '%s' should have 1+ lines.", io->filename);
io->updated = 0;
return;
}
io->Read = 0;
io->Write = 0;
/*
io->Sync = 0;
io->Async = 0;
io->Total = 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));
else if(unlikely(hash == Write_hash && !strcmp(s, "Write")))
io->Write += str2ull(procfile_lineword(ff, i, 2));
/*
else if(unlikely(hash == Sync_hash && !strcmp(s, "Sync")))
io->Sync += str2ull(procfile_lineword(ff, i, 2));
else if(unlikely(hash == Async_hash && !strcmp(s, "Async")))
io->Async += str2ull(procfile_lineword(ff, i, 2));
else if(unlikely(hash == Total_hash && !strcmp(s, "Total")))
io->Total += str2ull(procfile_lineword(ff, i, 2));
*/
}
io->updated = 1;
if(unlikely(io->enabled == CONFIG_BOOLEAN_AUTO)) {
if(unlikely(io->Read || io->Write))
io->enabled = CONFIG_BOOLEAN_YES;
else
io->delay_counter = cgroup_recheck_zero_blkio_every_iterations;
}
}
}
static inline void cgroup_read_memory(struct memory *mem) {
static procfile *ff = NULL;
// read detailed ram usage
if(likely(mem->filename_detailed)) {
if(unlikely(mem->enabled_detailed == CONFIG_BOOLEAN_AUTO && mem->delay_counter_detailed > 0)) {
mem->delay_counter_detailed--;
goto memory_next;
}
ff = procfile_reopen(ff, mem->filename_detailed, NULL, PROCFILE_FLAG_DEFAULT);
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)) {
error("CGROUP: file '%s' should have 1+ lines.", mem->filename_detailed);
mem->updated_detailed = 0;
goto memory_next;
}
if(unlikely(!mem->arl_base)) {
mem->arl_base = arl_create("cgroup/memory", NULL, 60);
arl_expect(mem->arl_base, "cache", &mem->cache);
arl_expect(mem->arl_base, "rss", &mem->rss);
arl_expect(mem->arl_base, "rss_huge", &mem->rss_huge);
arl_expect(mem->arl_base, "mapped_file", &mem->mapped_file);
arl_expect(mem->arl_base, "writeback", &mem->writeback);
mem->arl_dirty = arl_expect(mem->arl_base, "dirty", &mem->dirty);
mem->arl_swap = arl_expect(mem->arl_base, "swap", &mem->swap);
arl_expect(mem->arl_base, "pgpgin", &mem->pgpgin);
arl_expect(mem->arl_base, "pgpgout", &mem->pgpgout);
arl_expect(mem->arl_base, "pgfault", &mem->pgfault);
arl_expect(mem->arl_base, "pgmajfault", &mem->pgmajfault);
}
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(mem->arl_swap->flags & ARL_ENTRY_FLAG_FOUND))
mem->detailed_has_swap = 1;
// fprintf(stderr, "READ: '%s', cache: %llu, rss: %llu, rss_huge: %llu, mapped_file: %llu, writeback: %llu, dirty: %llu, swap: %llu, pgpgin: %llu, pgpgout: %llu, pgfault: %llu, pgmajfault: %llu, inactive_anon: %llu, active_anon: %llu, inactive_file: %llu, active_file: %llu, unevictable: %llu, hierarchical_memory_limit: %llu, total_cache: %llu, total_rss: %llu, total_rss_huge: %llu, total_mapped_file: %llu, total_writeback: %llu, total_dirty: %llu, total_swap: %llu, total_pgpgin: %llu, total_pgpgout: %llu, total_pgfault: %llu, total_pgmajfault: %llu, total_inactive_anon: %llu, total_active_anon: %llu, total_inactive_file: %llu, total_active_file: %llu, total_unevictable: %llu\n", mem->filename, mem->cache, mem->rss, mem->rss_huge, mem->mapped_file, mem->writeback, mem->dirty, mem->swap, mem->pgpgin, mem->pgpgout, mem->pgfault, mem->pgmajfault, mem->inactive_anon, mem->active_anon, mem->inactive_file, mem->active_file, mem->unevictable, mem->hierarchical_memory_limit, mem->total_cache, mem->total_rss, mem->total_rss_huge, mem->total_mapped_file, mem->total_writeback, mem->total_dirty, mem->total_swap, mem->total_pgpgin, mem->total_pgpgout, mem->total_pgfault, mem->total_pgmajfault, mem->total_inactive_anon, mem->total_active_anon, mem->total_inactive_file, mem->total_active_file, mem->total_unevictable);
mem->updated_detailed = 1;
if(unlikely(mem->enabled_detailed == CONFIG_BOOLEAN_AUTO)) {
if(mem->cache || mem->dirty || mem->rss || mem->rss_huge || mem->mapped_file || mem->writeback || mem->swap || mem->pgpgin || mem->pgpgout || mem->pgfault || mem->pgmajfault)
mem->enabled_detailed = CONFIG_BOOLEAN_YES;
else
mem->delay_counter_detailed = cgroup_recheck_zero_mem_detailed_every_iterations;
}
}
memory_next:
// read usage_in_bytes
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(unlikely(mem->updated_usage_in_bytes && mem->enabled_usage_in_bytes == CONFIG_BOOLEAN_AUTO && mem->usage_in_bytes))
mem->enabled_usage_in_bytes = CONFIG_BOOLEAN_YES;
}
// read msw_usage_in_bytes
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(unlikely(mem->updated_msw_usage_in_bytes && mem->enabled_msw_usage_in_bytes == CONFIG_BOOLEAN_AUTO && mem->msw_usage_in_bytes))
mem->enabled_msw_usage_in_bytes = CONFIG_BOOLEAN_YES;
}
// read failcnt
if(likely(mem->filename_failcnt)) {
if(unlikely(mem->enabled_failcnt == CONFIG_BOOLEAN_AUTO && mem->delay_counter_failcnt > 0)) {
mem->updated_failcnt = 0;
mem->delay_counter_failcnt--;
}
else {
mem->updated_failcnt = !read_single_number_file(mem->filename_failcnt, &mem->failcnt);
if(unlikely(mem->updated_failcnt && mem->enabled_failcnt == CONFIG_BOOLEAN_AUTO)) {
if(unlikely(!mem->failcnt))
mem->delay_counter_failcnt = cgroup_recheck_zero_mem_failcnt_every_iterations;
else
mem->enabled_failcnt = CONFIG_BOOLEAN_YES;
}
}
}
}
static inline void cgroup_read(struct cgroup *cg) {
debug(D_CGROUP, "reading metrics for cgroups '%s'", cg->id);
cgroup_read_cpuacct_stat(&cg->cpuacct_stat);
cgroup_read_cpuacct_usage(&cg->cpuacct_usage);
cgroup_read_memory(&cg->memory);
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);
}
static inline void read_all_cgroups(struct cgroup *root) {
debug(D_CGROUP, "reading metrics for all cgroups");
struct cgroup *cg;
for(cg = root; cg ; cg = cg->next)
if(cg->enabled && cg->available)
cgroup_read(cg);
}
// ----------------------------------------------------------------------------
// cgroup network interfaces
#define CGROUP_NETWORK_INTERFACE_MAX_LINE 2048
static inline void read_cgroup_network_interfaces(struct cgroup *cg) {
debug(D_CGROUP, "looking for the network interfaces of cgroup '%s' with chart id '%s' and title '%s'", cg->id, cg->chart_id, cg->chart_title);
pid_t cgroup_pid;
char command[CGROUP_NETWORK_INTERFACE_MAX_LINE + 1];
snprintfz(command, CGROUP_NETWORK_INTERFACE_MAX_LINE, "exec %s --cgroup '%s%s'", cgroups_network_interface_script, cgroup_cpuacct_base, cg->id);
debug(D_CGROUP, "executing command '%s' for cgroup '%s'", command, cg->id);
FILE *fp = mypopen(command, &cgroup_pid);
if(!fp) {
error("CGROUP: cannot popen(\"%s\", \"r\").", command);
return;
}
char *s;
char buffer[CGROUP_NETWORK_INTERFACE_MAX_LINE + 1];
while((s = fgets(buffer, CGROUP_NETWORK_INTERFACE_MAX_LINE, fp))) {
trim(s);
if(*s && *s != '\n') {
char *t = s;
while(*t && *t != ' ') t++;
if(*t == ' ') {
*t = '\0';
t++;
}
if(!*s) {
error("CGROUP: empty host interface returned by script");
continue;
}
if(!*t) {
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;
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);
}
}
mypclose(fp, cgroup_pid);
// debug(D_CGROUP, "closed command for cgroup '%s'", cg->id);
}
static inline void free_cgroup_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);
}
}
// ----------------------------------------------------------------------------
// add/remove/find cgroup objects
#define CGROUP_CHARTID_LINE_MAX 1024
static inline char *cgroup_title_strdupz(const char *s) {
if(!s || !*s) s = "/";
if(*s == '/' && s[1] != '\0') s++;
char *r = strdupz(s);
netdata_fix_chart_name(r);
return r;
}
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;
}
static inline void cgroup_get_chart_name(struct cgroup *cg) {
debug(D_CGROUP, "looking for the name of cgroup '%s' with chart id '%s' and title '%s'", cg->id, cg->chart_id, cg->chart_title);
pid_t cgroup_pid;
char command[CGROUP_CHARTID_LINE_MAX + 1];
snprintfz(command, CGROUP_CHARTID_LINE_MAX, "exec %s '%s' '%s'", cgroups_rename_script, cg->chart_id, cg->id);
debug(D_CGROUP, "executing command \"%s\" for cgroup '%s'", command, cg->id);
FILE *fp = mypopen(command, &cgroup_pid);
if(fp) {
// debug(D_CGROUP, "reading from command '%s' for cgroup '%s'", command, cg->id);
char buffer[CGROUP_CHARTID_LINE_MAX + 1];
char *s = fgets(buffer, CGROUP_CHARTID_LINE_MAX, fp);
// debug(D_CGROUP, "closing command for cgroup '%s'", cg->id);
mypclose(fp, cgroup_pid);
// debug(D_CGROUP, "closed command for cgroup '%s'", cg->id);
if(s && *s && *s != '\n') {
debug(D_CGROUP, "cgroup '%s' should be renamed to '%s'", cg->id, s);
trim(s);
freez(cg->chart_title);
cg->chart_title = cgroup_title_strdupz(s);
freez(cg->chart_id);
cg->chart_id = cgroup_chart_id_strdupz(s);
cg->hash_chart = simple_hash(cg->chart_id);
}
}
else
error("CGROUP: cannot popen(\"%s\", \"r\").", command);
}
static inline struct cgroup *cgroup_add(const char *id) {
if(!id || !*id) id = "/";
debug(D_CGROUP, "adding to list, cgroup with id '%s'", id);
if(cgroup_root_count >= cgroup_root_max) {
info("CGROUP: maximum number of cgroups reached (%d). Not adding cgroup '%s'", cgroup_root_count, id);
return NULL;
}
int def = simple_pattern_matches(enabled_cgroup_patterns, id)?cgroup_enable_new_cgroups_detected_at_runtime:0;
struct cgroup *cg = callocz(1, sizeof(struct cgroup));
cg->id = strdupz(id);
cg->hash = simple_hash(cg->id);
cg->chart_title = cgroup_title_strdupz(id);
cg->chart_id = cgroup_chart_id_strdupz(id);
cg->hash_chart = simple_hash(cg->chart_id);
if(!cgroup_root)
cgroup_root = cg;
else {
// append it
struct cgroup *e;
for(e = cgroup_root; e->next ;e = e->next) ;
e->next = cg;
}
cgroup_root_count++;
// fix the chart_id and title by calling the external script
if(simple_pattern_matches(enabled_cgroup_renames, cg->id)) {
cgroup_get_chart_name(cg);
debug(D_CGROUP, "cgroup '%s' renamed to '%s' (title: '%s')", cg->id, cg->chart_id, cg->chart_title);
}
else
debug(D_CGROUP, "cgroup '%s' will not be renamed - it matches the list of disabled cgroup renames (will be shown as '%s')", cg->id, cg->chart_id);
int user_configurable = 1;
// check if this cgroup should be a systemd service
if(cgroup_enable_systemd_services) {
if(simple_pattern_matches(systemd_services_cgroups, cg->id) ||
simple_pattern_matches(systemd_services_cgroups, cg->chart_id)) {
debug(D_CGROUP, "cgroup '%s' with chart id '%s' (title: '%s') matches systemd services cgroups", cg->id, cg->chart_id, cg->chart_title);
char buffer[CGROUP_CHARTID_LINE_MAX + 1];
cg->options |= CGROUP_OPTIONS_SYSTEM_SLICE_SERVICE;
strncpy(buffer, cg->id, CGROUP_CHARTID_LINE_MAX);
char *s = buffer;
//freez(cg->chart_id);
//cg->chart_id = cgroup_chart_id_strdupz(s);
//cg->hash_chart = simple_hash(cg->chart_id);
// 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->chart_title);
cg->chart_title = cgroup_title_strdupz(s);
cg->enabled = 1;
user_configurable = 0;
debug(D_CGROUP, "cgroup '%s' renamed to '%s' (title: '%s')", cg->id, cg->chart_id, cg->chart_title);
}
else
debug(D_CGROUP, "cgroup '%s' with chart id '%s' (title: '%s') does not match systemd services groups", cg->id, cg->chart_id, cg->chart_title);
}
if(user_configurable) {
// allow the user to enable/disable this individualy
char option[FILENAME_MAX + 1];
snprintfz(option, FILENAME_MAX, "enable cgroup %s", cg->chart_title);
cg->enabled = (char) config_get_boolean("plugin:cgroups", option, def);
}
// detect duplicate cgroups
if(cg->enabled) {
struct cgroup *t;
for (t = cgroup_root; t; t = t->next) {
if (t != cg && t->enabled && t->hash_chart == cg->hash_chart && !strcmp(t->chart_id, cg->chart_id)) {
if (!strncmp(t->chart_id, "/system.slice/", 14) && !strncmp(cg->chart_id, "/init.scope/system.slice/", 25)) {
error("CGROUP: chart id '%s' already exists with id '%s' and is enabled. Swapping them by enabling cgroup with id '%s' and disabling cgroup with id '%s'.",
cg->chart_id, t->id, cg->id, t->id);
debug(D_CGROUP, "Control group with chart id '%s' already exists with id '%s' and is enabled. Swapping them by enabling cgroup with id '%s' and disabling cgroup with id '%s'.",
cg->chart_id, t->id, cg->id, t->id);
t->enabled = 0;
t->options |= CGROUP_OPTIONS_DISABLED_DUPLICATE;
}
else {
error("CGROUP: chart id '%s' already exists with id '%s' and is enabled and available. Disabling cgroup with id '%s'.",
cg->chart_id, t->id, cg->id);
debug(D_CGROUP, "Control group with chart id '%s' already exists with id '%s' and is enabled and available. Disabling cgroup with id '%s'.",
cg->chart_id, t->id, cg->id);
cg->enabled = 0;
cg->options |= CGROUP_OPTIONS_DISABLED_DUPLICATE;
}
break;
}
}
}
if(cg->enabled && !(cg->options & CGROUP_OPTIONS_SYSTEM_SLICE_SERVICE))
read_cgroup_network_interfaces(cg);