Red Hat Summit Red Hat Summit지원콘솔개발자평가판 시작연락처

8장.

8.1.
링크 복사

  1. # oc label node perf-node.example.com cpumanager=true
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  2. # oc edit machineconfigpool worker
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  3. metadata:
  creationTimestamp: 2020-xx-xxx
  generation: 3
  labels:
    custom-kubelet: cpumanager-enabled
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  4. apiVersion: machineconfiguration.openshift.io/v1
kind: KubeletConfig
metadata:
  name: cpumanager-enabled
spec:
  machineConfigPoolSelector:
    matchLabels:
      custom-kubelet: cpumanager-enabled
  kubeletConfig:
     cpuManagerPolicy: static
    1 
    
     cpuManagerReconcilePeriod: 5s
    2
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    1
    2 

  5. # oc create -f cpumanager-kubeletconfig.yaml
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  6. # oc get machineconfig 99-worker-XXXXXX-XXXXX-XXXX-XXXXX-kubelet -o json | grep ownerReference -A7
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           "ownerReferences": [
            {
                "apiVersion": "machineconfiguration.openshift.io/v1",
                "kind": "KubeletConfig",
                "name": "cpumanager-enabled",
                "uid": "7ed5616d-6b72-11e9-aae1-021e1ce18878"
            }
        ]
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  7. # oc debug node/perf-node.example.com
sh-4.2# cat /host/etc/kubernetes/kubelet.conf | grep cpuManager
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    cpuManagerPolicy: static
    1 
    
cpuManagerReconcilePeriod: 5s
    2
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    1
    2 

  8. $ oc new-project <project_name>
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  9. # cat cpumanager-pod.yaml
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    apiVersion: v1
kind: Pod
metadata:
  generateName: cpumanager-
spec:
  securityContext:
    runAsNonRoot: true
    seccompProfile:
      type: RuntimeDefault
  containers:
  - name: cpumanager
    image: gcr.io/google_containers/pause:3.2
    resources:
      requests:
        cpu: 1
        memory: "1G"
      limits:
        cpu: 1
        memory: "1G"
    securityContext:
      allowPrivilegeEscalation: false
      capabilities:
        drop: [ALL]
  nodeSelector:
    cpumanager: "true"
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  10. # oc create -f cpumanager-pod.yaml
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  1. # oc describe pod cpumanager
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    Name:               cpumanager-6cqz7
Namespace:          default
Priority:           0
PriorityClassName:  <none>
Node:  perf-node.example.com/xxx.xx.xx.xxx
...
 Limits:
      cpu:     1
      memory:  1G
    Requests:
      cpu:        1
      memory:     1G
...
QoS Class:       Guaranteed
Node-Selectors:  cpumanager=true
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  2. # oc describe node --selector='cpumanager=true' | grep -i cpumanager- -B2
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    NAMESPACE    NAME                CPU Requests  CPU Limits  Memory Requests  Memory Limits  Age
cpuman       cpumanager-mlrrz    1 (28%)       1 (28%)     1G (13%)         1G (13%)       27m
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  3. # oc debug node/perf-node.example.com
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    sh-4.2# systemctl status | grep -B5 pause
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    참고

    # ├─init.scope
│ └─1 /usr/lib/systemd/systemd --switched-root --system --deserialize 17
└─kubepods.slice
  ├─kubepods-pod69c01f8e_6b74_11e9_ac0f_0a2b62178a22.slice
  │ ├─crio-b5437308f1a574c542bdf08563b865c0345c8f8c0b0a655612c.scope
  │ └─32706 /pause
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  4. # cd /sys/fs/cgroup/kubepods.slice/kubepods-pod69c01f8e_6b74_11e9_ac0f_0a2b62178a22.slice/crio-b5437308f1ad1a7db0574c542bdf08563b865c0345c86e9585f8c0b0a655612c.scope
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    # for i in `ls cpuset.cpus cgroup.procs` ; do echo -n "$i "; cat $i ; done
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    참고

    cpuset.cpus 1
tasks 32706
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  5. # grep ^Cpus_allowed_list /proc/32706/status
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     Cpus_allowed_list:    1
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  6. # cat /sys/fs/cgroup/kubepods.slice/kubepods-besteffort.slice/kubepods-besteffort-podc494a073_6b77_11e9_98c0_06bba5c387ea.slice/crio-c56982f57b75a2420947f0afc6cafe7534c5734efc34157525fa9abbf99e3849.scope/cpuset.cpus
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    # oc describe node perf-node.example.com
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    ...
Capacity:
 attachable-volumes-aws-ebs:  39
 cpu:                         2
 ephemeral-storage:           124768236Ki
 hugepages-1Gi:               0
 hugepages-2Mi:               0
 memory:                      8162900Ki
 pods:                        250
Allocatable:
 attachable-volumes-aws-ebs:  39
 cpu:                         1500m
 ephemeral-storage:           124768236Ki
 hugepages-1Gi:               0
 hugepages-2Mi:               0
 memory:                      7548500Ki
 pods:                        250
-------                               ----                           ------------  ----------  ---------------  -------------  ---
  default                                 cpumanager-6cqz7               1 (66%)       1 (66%)     1G (12%)         1G (12%)       29m

Allocated resources:
  (Total limits may be over 100 percent, i.e., overcommitted.)
  Resource                    Requests          Limits
  --------                    --------          ------
  cpu                         1440m (96%)       1 (66%)
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    NAME                    READY   STATUS    RESTARTS   AGE
cpumanager-6cqz7        1/1     Running   0          33m
cpumanager-7qc2t        0/1     Pending   0          11s
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