10576c298e
This patch adds support for a container annotation and two separate
pod annotations for controlling the blockio class of containers.
The container annotation can be used by a CRI client:
"io.kubernetes.cri.blockio-class"
Pod annotations specify the blockio class in the K8s pod spec level:
"blockio.resources.beta.kubernetes.io/pod"
(pod-wide default for all containers within)
"blockio.resources.beta.kubernetes.io/container.<container_name>"
(container-specific overrides)
Correspondingly, this patch adds support for --blockio-class and
--blockio-config-file to ctr, too.
This implementation follows the resource class annotation pattern
introduced in RDT and merged in commit 893701220.
Signed-off-by: Antti Kervinen <antti.kervinen@intel.com>
76 lines
2.1 KiB
Go
76 lines
2.1 KiB
Go
// Copyright 2020 Intel Corporation. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package cgroups
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import (
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"path"
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"path/filepath"
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)
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//nolint
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const (
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// Tasks is a cgroup's "tasks" entry.
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Tasks = "tasks"
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// Procs is cgroup's "cgroup.procs" entry.
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Procs = "cgroup.procs"
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// CpuShares is the cpu controller's "cpu.shares" entry.
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CpuShares = "cpu.shares"
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// CpuPeriod is the cpu controller's "cpu.cfs_period_us" entry.
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CpuPeriod = "cpu.cfs_period_us"
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// CpuQuota is the cpu controller's "cpu.cfs_quota_us" entry.
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CpuQuota = "cpu.cfs_quota_us"
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// CpusetCpus is the cpuset controller's cpuset.cpus entry.
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CpusetCpus = "cpuset.cpus"
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// CpusetMems is the cpuset controller's cpuset.mems entry.
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CpusetMems = "cpuset.mems"
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)
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var (
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// mount is the parent directory for per-controller cgroupfs mounts.
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mountDir = "/sys/fs/cgroup"
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// v2Dir is the parent directory for per-controller cgroupfs mounts.
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v2Dir = path.Join(mountDir, "unified")
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// KubeletRoot is the --cgroup-root option the kubelet is running with.
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KubeletRoot = ""
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)
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// GetMountDir returns the common mount point for cgroup v1 controllers.
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func GetMountDir() string {
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return mountDir
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}
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// SetMountDir sets the common mount point for the cgroup v1 controllers.
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func SetMountDir(dir string) {
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v2, _ := filepath.Rel(mountDir, v2Dir)
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mountDir = dir
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if v2 != "" {
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v2Dir = path.Join(mountDir, v2)
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}
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}
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// GetV2Dir returns the cgroup v2 unified mount directory.
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func GetV2Dir() string {
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return v2Dir
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}
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// SetV2Dir sets the unified cgroup v2 mount directory.
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func SetV2Dir(dir string) {
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if dir[0] == '/' {
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v2Dir = dir
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} else {
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v2Dir = path.Join(mountDir, v2Dir)
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}
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}
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