mirror of
https://github.com/containers/podman.git
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2792e598c7
currently, setting any sort of resource limit in a pod does nothing. With the newly refactored creation process in c/common, podman ca now set resources at a pod level meaning that resource related flags can now be exposed to podman pod create. cgroupfs and systemd are both supported with varying completion. cgroupfs is a much simpler process and one that is virtually complete for all resource types, the flags now just need to be added. systemd on the other hand has to be handeled via the dbus api meaning that the limits need to be passed as recognized properties to systemd. The properties added so far are the ones that podman pod create supports as well as `cpuset-mems` as this will be the next flag I work on. Signed-off-by: Charlie Doern <cdoern@redhat.com>
72 lines
1.5 KiB
Go
72 lines
1.5 KiB
Go
//go:build !linux
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// +build !linux
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package cgroups
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import (
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"fmt"
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"io/ioutil"
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"path/filepath"
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spec "github.com/opencontainers/runtime-spec/specs-go"
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)
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type pidHandler struct{}
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func getPidsHandler() *pidHandler {
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return &pidHandler{}
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}
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// Apply set the specified constraints
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func (c *pidHandler) Apply(ctr *CgroupControl, res *spec.LinuxResources) error {
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if res.Pids == nil {
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return nil
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}
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var PIDRoot string
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if ctr.cgroup2 {
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PIDRoot = filepath.Join(cgroupRoot, ctr.path)
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} else {
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PIDRoot = ctr.getCgroupv1Path(Pids)
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}
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p := filepath.Join(PIDRoot, "pids.max")
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return ioutil.WriteFile(p, []byte(fmt.Sprintf("%d\n", res.Pids.Limit)), 0o644)
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}
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// Create the cgroup
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func (c *pidHandler) Create(ctr *CgroupControl) (bool, error) {
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if ctr.cgroup2 {
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return false, nil
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}
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return ctr.createCgroupDirectory(Pids)
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}
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// Destroy the cgroup
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func (c *pidHandler) Destroy(ctr *CgroupControl) error {
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return rmDirRecursively(ctr.getCgroupv1Path(Pids))
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}
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// Stat fills a metrics structure with usage stats for the controller
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func (c *pidHandler) Stat(ctr *CgroupControl, m *Metrics) error {
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if ctr.path == "" {
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// nothing we can do to retrieve the pids.current path
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return nil
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}
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var PIDRoot string
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if ctr.cgroup2 {
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PIDRoot = filepath.Join(cgroupRoot, ctr.path)
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} else {
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PIDRoot = ctr.getCgroupv1Path(Pids)
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}
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current, err := readFileAsUint64(filepath.Join(PIDRoot, "pids.current"))
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if err != nil {
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return err
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}
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m.Pids = PidsMetrics{Current: current}
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return nil
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}
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