932246b575
This adds a config option to place the `containerd` daemon process into
a cgroup so that proper resource usage and accounting can be applied.
It defaults to not being place inside a cgroup and will create a new
cgroup if the `path` does not exist in the config or join an existing
`path` if it already exists.
```toml
[cgroup]
path = "/containerd"
```
Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
58 lines
1.5 KiB
Go
58 lines
1.5 KiB
Go
package server
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import (
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"context"
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"os"
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"github.com/containerd/cgroups"
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"github.com/containerd/containerd/log"
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"github.com/containerd/containerd/sys"
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specs "github.com/opencontainers/runtime-spec/specs-go"
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)
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const (
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// DefaultRootDir is the default location used by containerd to store
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// persistent data
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DefaultRootDir = "/var/lib/containerd"
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// DefaultStateDir is the default location used by containerd to store
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// transient data
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DefaultStateDir = "/run/containerd"
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// DefaultAddress is the default unix socket address
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DefaultAddress = "/run/containerd/containerd.sock"
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// DefaultDebuggAddress is the default unix socket address for pprof data
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DefaultDebugAddress = "/run/containerd/debug.sock"
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)
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// apply sets config settings on the server process
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func apply(ctx context.Context, config *Config) error {
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if config.Subreaper {
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log.G(ctx).Info("setting subreaper...")
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if err := sys.SetSubreaper(1); err != nil {
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return err
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}
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}
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if config.OOMScore != 0 {
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log.G(ctx).Infof("changing OOM score to %d", config.OOMScore)
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if err := sys.SetOOMScore(os.Getpid(), config.OOMScore); err != nil {
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return err
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}
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}
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if config.Cgroup.Path != "" {
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cg, err := cgroups.Load(cgroups.V1, cgroups.StaticPath(config.Cgroup.Path))
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if err != nil {
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if err != cgroups.ErrCgroupDeleted {
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return err
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}
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if cg, err = cgroups.New(cgroups.V1, cgroups.StaticPath(config.Cgroup.Path), &specs.LinuxResources{}); err != nil {
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return err
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}
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}
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if err := cg.Add(cgroups.Process{
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Pid: os.Getpid(),
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}); err != nil {
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return err
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}
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}
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return nil
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}
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