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/*
* Copyright (c) 2023. Nydus Developers. All rights reserved.
*
* SPDX-License-Identifier: Apache-2.0
*/
package cgroup
import (
"errors"
"github.com/containerd/cgroups"
v1 "github.com/containerd/nydus-snapshotter/pkg/cgroup/v1"
v2 "github.com/containerd/nydus-snapshotter/pkg/cgroup/v2"
)
const (
defaultSlice = "system.slice"
)
var (
ErrCgroupNotSupported = errors.New("cgroups: cgroup not supported")
)
type Config struct {
MemoryLimitInBytes int64
}
type DaemonCgroup interface {
// Delete the current cgroup.
Delete() error
// Add a process to current cgroup.
AddProc(pid int) error
}
func createCgroup(name string, config Config) (DaemonCgroup, error) {
if cgroups.Mode() == cgroups.Unified {
return v2.NewCgroup(defaultSlice, name, config.MemoryLimitInBytes)
}
return v1.NewCgroup(defaultSlice, name, config.MemoryLimitInBytes)
}
func supported() bool {
return cgroups.Mode() != cgroups.Unavailable
}
func displayMode() string {
switch cgroups.Mode() {
case cgroups.Legacy:
return "legacy"
case cgroups.Hybrid:
return "hybrid"
case cgroups.Unified:
return "unified"
case cgroups.Unavailable:
return "unavailable"
default:
return "unknown"
}
}
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