diff options
Diffstat (limited to 'collectors/cgroups.plugin/README.md')
| -rw-r--r-- | collectors/cgroups.plugin/README.md | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/collectors/cgroups.plugin/README.md b/collectors/cgroups.plugin/README.md index 47eeebc5..d4f6d8ce 100644 --- a/collectors/cgroups.plugin/README.md +++ b/collectors/cgroups.plugin/README.md @@ -32,7 +32,7 @@ Linux exposes resource usage reporting and provides dynamic configuration for cg path to /sys/fs/cgroup/blkio = /sys/fs/cgroup/blkio path to /sys/fs/cgroup/memory = /sys/fs/cgroup/memory path to /sys/fs/cgroup/devices = /sys/fs/cgroup/devices -``` +``` netdata rescans these directories for added or removed cgroups every `check for new cgroups every` seconds. @@ -51,7 +51,7 @@ To provide a sane default for this setting, netdata uses the following pattern l ``` [plugin:cgroups] - search for cgroups in subpaths matching = !*/init.scope !*-qemu !/init.scope !/system !/systemd !/user !/user.slice * + search for cgroups in subpaths matching = !*/init.scope !*-qemu !/init.scope !/system !/systemd !/user !/user.slice * ``` So, we disable checking for **child cgroups** in systemd internal cgroups ([systemd services are monitored by netdata](#monitoring-systemd-services)), user cgroups (normally used for desktop and remote user sessions), qemu virtual machines (child cgroups of virtual machines) and `init.scope`. All others are enabled. @@ -70,7 +70,7 @@ To provide a sane default, netdata uses the following pattern list (it checks th ``` [plugin:cgroups] - enable by default cgroups matching = !*/init.scope *.scope !*/vcpu* !*/emulator !*.mount !*.partition !*.service !*.slice !*.swap !*.user !/ !/docker !/libvirt !/lxc !/lxc/*/ns !/lxc/*/ns/* !/machine !/qemu !/system !/systemd !/user * + enable by default cgroups matching = !*/init.scope *.scope !*/vcpu* !*/emulator !*.mount !*.partition !*.service !*.slice !*.swap !*.user !/ !/docker !/libvirt !/lxc !/lxc/*/ns !/lxc/*/ns/* !/machine !/qemu !/system !/systemd !/user * ``` The above provides the default `yes` or `no` setting for the cgroup. However, there is an additional step. In many cases the cgroups found in the `/sys/fs/cgroup` hierarchy are just random numbers and in many cases these numbers are ephemeral: they change across reboots or sessions. @@ -158,6 +158,13 @@ cgroup_enable=memory swapaccount=1 You can add the above, directly at the `linux` line in your `/boot/grub/grub.cfg` or appending them to the `GRUB_CMDLINE_LINUX` in `/etc/default/grub` (in which case you will have to run `update-grub` before rebooting). On DigitalOcean debian images you may have to set it at `/etc/default/grub.d/50-cloudimg-settings.cfg`. +Which systemd services are monitored by netdata is determined by the following pattern list: + +``` +[plugin:cgroups] + cgroups to match as systemd services = !/system.slice/*/*.service /system.slice/*.service +``` + --- ## Monitoring ephemeral containers @@ -185,3 +192,5 @@ So, when a network interface or container stops, netdata might log a few errors 6. obsolete charts will be removed from memory, 1 hour after the last user viewed them (configurable with `[global].cleanup obsolete charts after seconds = 3600` (at netdata.conf). 7. when obsolete charts are removed from memory they are also deleted from disk (configurable with `[global].delete obsolete charts files = yes`) + +[]() |