470 lines
18 KiB
C
470 lines
18 KiB
C
// SPDX-License-Identifier: GPL-3.0-or-later
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#include "plugin_diskspace.h"
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#define PLUGIN_DISKSPACE_NAME "diskspace.plugin"
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#define DELAULT_EXCLUDED_PATHS "/proc/* /sys/* /var/run/user/* /run/user/* /snap/* /var/lib/docker/*"
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#define DEFAULT_EXCLUDED_FILESYSTEMS "*gvfs *gluster* *s3fs *ipfs *davfs2 *httpfs *sshfs *gdfs *moosefs fusectl"
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#define CONFIG_SECTION_DISKSPACE "plugin:proc:diskspace"
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static struct mountinfo *disk_mountinfo_root = NULL;
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static int check_for_new_mountpoints_every = 15;
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static int cleanup_mount_points = 1;
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static inline void mountinfo_reload(int force) {
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static time_t last_loaded = 0;
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time_t now = now_realtime_sec();
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if(force || now - last_loaded >= check_for_new_mountpoints_every) {
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// mountinfo_free_all() can be called with NULL disk_mountinfo_root
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mountinfo_free_all(disk_mountinfo_root);
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// re-read mountinfo in case something changed
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disk_mountinfo_root = mountinfo_read(0);
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last_loaded = now;
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}
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}
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// Data to be stored in DICTIONARY dict_mountpoints used by do_disk_space_stats().
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// This DICTIONARY is used to lookup the settings of the mount point on each iteration.
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struct mount_point_metadata {
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int do_space;
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int do_inodes;
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int shown_error;
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int updated;
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size_t collected; // the number of times this has been collected
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RRDSET *st_space;
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RRDDIM *rd_space_used;
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RRDDIM *rd_space_avail;
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RRDDIM *rd_space_reserved;
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RRDSET *st_inodes;
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RRDDIM *rd_inodes_used;
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RRDDIM *rd_inodes_avail;
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RRDDIM *rd_inodes_reserved;
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};
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static DICTIONARY *dict_mountpoints = NULL;
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#define rrdset_obsolete_and_pointer_null(st) do { if(st) { rrdset_is_obsolete(st); (st) = NULL; } } while(st)
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int mount_point_cleanup(void *entry, void *data) {
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(void)data;
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struct mount_point_metadata *mp = (struct mount_point_metadata *)entry;
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if(!mp) return 0;
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if(likely(mp->updated)) {
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mp->updated = 0;
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return 0;
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}
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if(likely(cleanup_mount_points && mp->collected)) {
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mp->collected = 0;
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mp->updated = 0;
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mp->shown_error = 0;
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mp->rd_space_avail = NULL;
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mp->rd_space_used = NULL;
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mp->rd_space_reserved = NULL;
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mp->rd_inodes_avail = NULL;
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mp->rd_inodes_used = NULL;
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mp->rd_inodes_reserved = NULL;
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rrdset_obsolete_and_pointer_null(mp->st_space);
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rrdset_obsolete_and_pointer_null(mp->st_inodes);
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}
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return 0;
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}
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static inline void do_disk_space_stats(struct mountinfo *mi, int update_every) {
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const char *family = mi->mount_point;
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const char *disk = mi->persistent_id;
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static SIMPLE_PATTERN *excluded_mountpoints = NULL;
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static SIMPLE_PATTERN *excluded_filesystems = NULL;
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int do_space, do_inodes;
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if(unlikely(!dict_mountpoints)) {
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SIMPLE_PREFIX_MODE mode = SIMPLE_PATTERN_EXACT;
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if(config_move("plugin:proc:/proc/diskstats", "exclude space metrics on paths", CONFIG_SECTION_DISKSPACE, "exclude space metrics on paths") != -1) {
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// old configuration, enable backwards compatibility
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mode = SIMPLE_PATTERN_PREFIX;
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}
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excluded_mountpoints = simple_pattern_create(
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config_get(CONFIG_SECTION_DISKSPACE, "exclude space metrics on paths", DELAULT_EXCLUDED_PATHS)
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, NULL
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, mode
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);
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excluded_filesystems = simple_pattern_create(
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config_get(CONFIG_SECTION_DISKSPACE, "exclude space metrics on filesystems", DEFAULT_EXCLUDED_FILESYSTEMS)
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, NULL
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, SIMPLE_PATTERN_EXACT
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);
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dict_mountpoints = dictionary_create(DICTIONARY_FLAG_SINGLE_THREADED);
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}
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struct mount_point_metadata *m = dictionary_get(dict_mountpoints, mi->mount_point);
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if(unlikely(!m)) {
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char var_name[4096 + 1];
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snprintfz(var_name, 4096, "plugin:proc:diskspace:%s", mi->mount_point);
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int def_space = config_get_boolean_ondemand(CONFIG_SECTION_DISKSPACE, "space usage for all disks", CONFIG_BOOLEAN_AUTO);
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int def_inodes = config_get_boolean_ondemand(CONFIG_SECTION_DISKSPACE, "inodes usage for all disks", CONFIG_BOOLEAN_AUTO);
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if(unlikely(simple_pattern_matches(excluded_mountpoints, mi->mount_point))) {
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def_space = CONFIG_BOOLEAN_NO;
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def_inodes = CONFIG_BOOLEAN_NO;
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}
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if(unlikely(simple_pattern_matches(excluded_filesystems, mi->filesystem))) {
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def_space = CONFIG_BOOLEAN_NO;
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def_inodes = CONFIG_BOOLEAN_NO;
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}
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// check if the mount point is a directory #2407
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// but only when it is enabled by default #4491
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if(def_space != CONFIG_BOOLEAN_NO || def_inodes != CONFIG_BOOLEAN_NO) {
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struct stat bs;
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if(stat(mi->mount_point, &bs) == -1) {
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error("DISKSPACE: Cannot stat() mount point '%s' (disk '%s', filesystem '%s', root '%s')."
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, mi->mount_point
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, disk
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, mi->filesystem?mi->filesystem:""
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, mi->root?mi->root:""
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);
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def_space = CONFIG_BOOLEAN_NO;
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def_inodes = CONFIG_BOOLEAN_NO;
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}
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else {
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if((bs.st_mode & S_IFMT) != S_IFDIR) {
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error("DISKSPACE: Mount point '%s' (disk '%s', filesystem '%s', root '%s') is not a directory."
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, mi->mount_point
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, disk
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, mi->filesystem?mi->filesystem:""
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, mi->root?mi->root:""
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);
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def_space = CONFIG_BOOLEAN_NO;
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def_inodes = CONFIG_BOOLEAN_NO;
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}
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}
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}
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do_space = config_get_boolean_ondemand(var_name, "space usage", def_space);
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do_inodes = config_get_boolean_ondemand(var_name, "inodes usage", def_inodes);
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struct mount_point_metadata mp = {
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.do_space = do_space,
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.do_inodes = do_inodes,
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.shown_error = 0,
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.updated = 0,
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.collected = 0,
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.st_space = NULL,
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.rd_space_avail = NULL,
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.rd_space_used = NULL,
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.rd_space_reserved = NULL,
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.st_inodes = NULL,
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.rd_inodes_avail = NULL,
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.rd_inodes_used = NULL,
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.rd_inodes_reserved = NULL
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};
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m = dictionary_set(dict_mountpoints, mi->mount_point, &mp, sizeof(struct mount_point_metadata));
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}
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m->updated = 1;
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if(unlikely(m->do_space == CONFIG_BOOLEAN_NO && m->do_inodes == CONFIG_BOOLEAN_NO))
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return;
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if(unlikely(mi->flags & MOUNTINFO_READONLY && !m->collected && m->do_space != CONFIG_BOOLEAN_YES && m->do_inodes != CONFIG_BOOLEAN_YES))
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return;
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struct statvfs buff_statvfs;
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if (statvfs(mi->mount_point, &buff_statvfs) < 0) {
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if(!m->shown_error) {
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error("DISKSPACE: failed to statvfs() mount point '%s' (disk '%s', filesystem '%s', root '%s')"
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, mi->mount_point
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, disk
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, mi->filesystem?mi->filesystem:""
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, mi->root?mi->root:""
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);
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m->shown_error = 1;
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}
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return;
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}
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m->shown_error = 0;
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// logic found at get_fs_usage() in coreutils
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unsigned long bsize = (buff_statvfs.f_frsize) ? buff_statvfs.f_frsize : buff_statvfs.f_bsize;
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fsblkcnt_t bavail = buff_statvfs.f_bavail;
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fsblkcnt_t btotal = buff_statvfs.f_blocks;
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fsblkcnt_t bavail_root = buff_statvfs.f_bfree;
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fsblkcnt_t breserved_root = bavail_root - bavail;
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fsblkcnt_t bused;
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if(likely(btotal >= bavail_root))
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bused = btotal - bavail_root;
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else
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bused = bavail_root - btotal;
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#ifdef NETDATA_INTERNAL_CHECKS
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if(unlikely(btotal != bavail + breserved_root + bused))
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error("DISKSPACE: disk block statistics for '%s' (disk '%s') do not sum up: total = %llu, available = %llu, reserved = %llu, used = %llu", mi->mount_point, disk, (unsigned long long)btotal, (unsigned long long)bavail, (unsigned long long)breserved_root, (unsigned long long)bused);
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#endif
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// --------------------------------------------------------------------------
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fsfilcnt_t favail = buff_statvfs.f_favail;
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fsfilcnt_t ftotal = buff_statvfs.f_files;
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fsfilcnt_t favail_root = buff_statvfs.f_ffree;
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fsfilcnt_t freserved_root = favail_root - favail;
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fsfilcnt_t fused = ftotal - favail_root;
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if(m->do_inodes == CONFIG_BOOLEAN_AUTO && favail == (fsfilcnt_t)-1) {
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// this file system does not support inodes reporting
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// eg. cephfs
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m->do_inodes = CONFIG_BOOLEAN_NO;
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}
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#ifdef NETDATA_INTERNAL_CHECKS
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if(unlikely(btotal != bavail + breserved_root + bused))
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error("DISKSPACE: disk inode statistics for '%s' (disk '%s') do not sum up: total = %llu, available = %llu, reserved = %llu, used = %llu", mi->mount_point, disk, (unsigned long long)ftotal, (unsigned long long)favail, (unsigned long long)freserved_root, (unsigned long long)fused);
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#endif
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// --------------------------------------------------------------------------
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int rendered = 0;
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if(m->do_space == CONFIG_BOOLEAN_YES || (m->do_space == CONFIG_BOOLEAN_AUTO &&
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(bavail || breserved_root || bused ||
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netdata_zero_metrics_enabled == CONFIG_BOOLEAN_YES))) {
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if(unlikely(!m->st_space)) {
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m->do_space = CONFIG_BOOLEAN_YES;
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m->st_space = rrdset_find_active_bytype_localhost("disk_space", disk);
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if(unlikely(!m->st_space)) {
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char title[4096 + 1];
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snprintfz(title, 4096, "Disk Space Usage for %s [%s]", family, mi->mount_source);
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m->st_space = rrdset_create_localhost(
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"disk_space"
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, disk
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, NULL
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, family
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, "disk.space"
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, title
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, "GiB"
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, PLUGIN_DISKSPACE_NAME
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, NULL
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, NETDATA_CHART_PRIO_DISKSPACE_SPACE
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, update_every
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, RRDSET_TYPE_STACKED
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);
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}
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m->rd_space_avail = rrddim_add(m->st_space, "avail", NULL, (collected_number)bsize, 1024 * 1024 * 1024, RRD_ALGORITHM_ABSOLUTE);
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m->rd_space_used = rrddim_add(m->st_space, "used", NULL, (collected_number)bsize, 1024 * 1024 * 1024, RRD_ALGORITHM_ABSOLUTE);
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m->rd_space_reserved = rrddim_add(m->st_space, "reserved_for_root", "reserved for root", (collected_number)bsize, 1024 * 1024 * 1024, RRD_ALGORITHM_ABSOLUTE);
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}
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else
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rrdset_next(m->st_space);
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rrddim_set_by_pointer(m->st_space, m->rd_space_avail, (collected_number)bavail);
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rrddim_set_by_pointer(m->st_space, m->rd_space_used, (collected_number)bused);
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rrddim_set_by_pointer(m->st_space, m->rd_space_reserved, (collected_number)breserved_root);
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rrdset_done(m->st_space);
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rendered++;
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}
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// --------------------------------------------------------------------------
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if(m->do_inodes == CONFIG_BOOLEAN_YES || (m->do_inodes == CONFIG_BOOLEAN_AUTO &&
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(favail || freserved_root || fused ||
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netdata_zero_metrics_enabled == CONFIG_BOOLEAN_YES))) {
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if(unlikely(!m->st_inodes)) {
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m->do_inodes = CONFIG_BOOLEAN_YES;
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m->st_inodes = rrdset_find_active_bytype_localhost("disk_inodes", disk);
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if(unlikely(!m->st_inodes)) {
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char title[4096 + 1];
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snprintfz(title, 4096, "Disk Files (inodes) Usage for %s [%s]", family, mi->mount_source);
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m->st_inodes = rrdset_create_localhost(
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"disk_inodes"
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, disk
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, NULL
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, family
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, "disk.inodes"
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, title
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, "inodes"
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, PLUGIN_DISKSPACE_NAME
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, NULL
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, NETDATA_CHART_PRIO_DISKSPACE_INODES
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, update_every
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, RRDSET_TYPE_STACKED
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);
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}
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m->rd_inodes_avail = rrddim_add(m->st_inodes, "avail", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
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m->rd_inodes_used = rrddim_add(m->st_inodes, "used", NULL, 1, 1, RRD_ALGORITHM_ABSOLUTE);
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m->rd_inodes_reserved = rrddim_add(m->st_inodes, "reserved_for_root", "reserved for root", 1, 1, RRD_ALGORITHM_ABSOLUTE);
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}
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else
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rrdset_next(m->st_inodes);
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rrddim_set_by_pointer(m->st_inodes, m->rd_inodes_avail, (collected_number)favail);
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rrddim_set_by_pointer(m->st_inodes, m->rd_inodes_used, (collected_number)fused);
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rrddim_set_by_pointer(m->st_inodes, m->rd_inodes_reserved, (collected_number)freserved_root);
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rrdset_done(m->st_inodes);
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rendered++;
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}
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// --------------------------------------------------------------------------
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if(likely(rendered))
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m->collected++;
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}
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static void diskspace_main_cleanup(void *ptr) {
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struct netdata_static_thread *static_thread = (struct netdata_static_thread *)ptr;
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static_thread->enabled = NETDATA_MAIN_THREAD_EXITING;
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info("cleaning up...");
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static_thread->enabled = NETDATA_MAIN_THREAD_EXITED;
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}
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void *diskspace_main(void *ptr) {
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netdata_thread_cleanup_push(diskspace_main_cleanup, ptr);
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int vdo_cpu_netdata = config_get_boolean("plugin:proc", "netdata server resources", 1);
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cleanup_mount_points = config_get_boolean(CONFIG_SECTION_DISKSPACE, "remove charts of unmounted disks" , cleanup_mount_points);
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int update_every = (int)config_get_number(CONFIG_SECTION_DISKSPACE, "update every", localhost->rrd_update_every);
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if(update_every < localhost->rrd_update_every)
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update_every = localhost->rrd_update_every;
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check_for_new_mountpoints_every = (int)config_get_number(CONFIG_SECTION_DISKSPACE, "check for new mount points every", check_for_new_mountpoints_every);
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if(check_for_new_mountpoints_every < update_every)
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check_for_new_mountpoints_every = update_every;
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struct rusage thread;
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usec_t duration = 0;
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usec_t step = update_every * USEC_PER_SEC;
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heartbeat_t hb;
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heartbeat_init(&hb);
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while(!netdata_exit) {
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duration = heartbeat_monotonic_dt_to_now_usec(&hb);
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/* usec_t hb_dt = */ heartbeat_next(&hb, step);
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if(unlikely(netdata_exit)) break;
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// --------------------------------------------------------------------------
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// this is smart enough not to reload it every time
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mountinfo_reload(0);
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// --------------------------------------------------------------------------
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// disk space metrics
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struct mountinfo *mi;
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for(mi = disk_mountinfo_root; mi; mi = mi->next) {
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if(unlikely(mi->flags & (MOUNTINFO_IS_DUMMY | MOUNTINFO_IS_BIND)))
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continue;
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do_disk_space_stats(mi, update_every);
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if(unlikely(netdata_exit)) break;
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}
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if(unlikely(netdata_exit)) break;
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if(dict_mountpoints)
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dictionary_get_all(dict_mountpoints, mount_point_cleanup, NULL);
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if(vdo_cpu_netdata) {
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static RRDSET *stcpu_thread = NULL, *st_duration = NULL;
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static RRDDIM *rd_user = NULL, *rd_system = NULL, *rd_duration = NULL;
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// ----------------------------------------------------------------
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getrusage(RUSAGE_THREAD, &thread);
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if(unlikely(!stcpu_thread)) {
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stcpu_thread = rrdset_create_localhost(
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"netdata"
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, "plugin_diskspace"
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, NULL
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, "diskspace"
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, NULL
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, "NetData Disk Space Plugin CPU usage"
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, "milliseconds/s"
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, PLUGIN_DISKSPACE_NAME
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, NULL
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, NETDATA_CHART_PRIO_NETDATA_DISKSPACE
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, update_every
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, RRDSET_TYPE_STACKED
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);
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rd_user = rrddim_add(stcpu_thread, "user", NULL, 1, 1000, RRD_ALGORITHM_INCREMENTAL);
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rd_system = rrddim_add(stcpu_thread, "system", NULL, 1, 1000, RRD_ALGORITHM_INCREMENTAL);
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}
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else
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rrdset_next(stcpu_thread);
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rrddim_set_by_pointer(stcpu_thread, rd_user, thread.ru_utime.tv_sec * 1000000ULL + thread.ru_utime.tv_usec);
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rrddim_set_by_pointer(stcpu_thread, rd_system, thread.ru_stime.tv_sec * 1000000ULL + thread.ru_stime.tv_usec);
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rrdset_done(stcpu_thread);
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// ----------------------------------------------------------------
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if(unlikely(!st_duration)) {
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st_duration = rrdset_create_localhost(
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"netdata"
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, "plugin_diskspace_dt"
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, NULL
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, "diskspace"
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, NULL
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, "NetData Disk Space Plugin Duration"
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, "milliseconds/run"
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, PLUGIN_DISKSPACE_NAME
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, NULL
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, 132021
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, update_every
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, RRDSET_TYPE_AREA
|
|
);
|
|
|
|
rd_duration = rrddim_add(st_duration, "duration", NULL, 1, 1000, RRD_ALGORITHM_ABSOLUTE);
|
|
}
|
|
else
|
|
rrdset_next(st_duration);
|
|
|
|
rrddim_set_by_pointer(st_duration, rd_duration, duration);
|
|
rrdset_done(st_duration);
|
|
|
|
// ----------------------------------------------------------------
|
|
|
|
if(unlikely(netdata_exit)) break;
|
|
}
|
|
}
|
|
|
|
netdata_thread_cleanup_pop(1);
|
|
return NULL;
|
|
}
|