mirror of
https://github.com/gitpod-io/gitpod.git
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92 lines
2.0 KiB
Go
92 lines
2.0 KiB
Go
// Copyright (c) 2022 Gitpod GmbH. All rights reserved.
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// Licensed under the GNU Affero General Public License (AGPL).
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// See License-AGPL.txt in the project root for license information.
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package cgroup
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import (
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"context"
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"path/filepath"
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"sync"
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v2 "github.com/containerd/cgroups/v2"
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"github.com/gitpod-io/gitpod/common-go/log"
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)
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type ProcLimiterV2 struct {
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limits *v2.Resources
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cond *sync.Cond
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}
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func NewProcLimiterV2(processes int64) (*ProcLimiterV2, error) {
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return &ProcLimiterV2{
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limits: &v2.Resources{
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Pids: &v2.Pids{
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Max: processes,
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},
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},
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cond: sync.NewCond(&sync.Mutex{}),
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}, nil
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}
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func (c *ProcLimiterV2) Name() string { return "proc-limiter-v2" }
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func (c *ProcLimiterV2) Type() Version { return Version2 }
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func (c *ProcLimiterV2) Apply(ctx context.Context, opts *PluginOptions) error {
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update := make(chan struct{}, 1)
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go func() {
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defer close(update)
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for {
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c.cond.L.Lock()
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c.cond.Wait()
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c.cond.L.Unlock()
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if ctx.Err() != nil {
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return
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}
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update <- struct{}{}
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}
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}()
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go func() {
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log.WithField("cgroupPath", opts.CgroupPath).Debug("starting proc limiting")
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_, err := v2.NewManager(opts.BasePath, filepath.Join("/", opts.CgroupPath), c.limits)
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if err != nil {
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log.WithError(err).WithField("basePath", opts.BasePath).WithField("cgroupPath", opts.CgroupPath).WithField("limits", c.limits).Error("cannot write proc limits")
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}
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for {
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select {
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case <-update:
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_, err := v2.NewManager(opts.BasePath, filepath.Join("/", opts.CgroupPath), c.limits)
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if err != nil {
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log.WithError(err).WithField("basePath", opts.BasePath).WithField("cgroupPath", opts.CgroupPath).WithField("limits", c.limits).Error("cannot write proc limits")
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}
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case <-ctx.Done():
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return
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}
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}
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}()
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return nil
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}
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func (c *ProcLimiterV2) Update(processes int64) {
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c.cond.L.Lock()
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defer c.cond.L.Unlock()
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c.limits = &v2.Resources{
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Pids: &v2.Pids{
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Max: processes,
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},
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}
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log.WithField("limits", c.limits.Pids).Info("updating proc cgroups v2 limits")
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c.cond.Broadcast()
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}
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