2.2. 禁用 chrony 时间服务

流程

1. 创建 MachineConfig CR，为指定节点角色禁用 chronyd。

   1. 在 disable-chronyd.yaml 文件中保存以下 YAML：

      apiVersion: machineconfiguration.openshift.io/v1
      kind: MachineConfig
      metadata:
        labels:
          machineconfiguration.openshift.io/role: <node_role> 

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        name: disable-chronyd
      spec:
        config:
          ignition:
            version: 3.4.0
          systemd:
            units:
              - contents: |
                  [Unit]
                  Description=NTP client/server
                  Documentation=man:chronyd(8) man:chrony.conf(5)
                  After=ntpdate.service sntp.service ntpd.service
                  Conflicts=ntpd.service systemd-timesyncd.service
                  ConditionCapability=CAP_SYS_TIME
                  [Service]
                  Type=forking
                  PIDFile=/run/chrony/chronyd.pid
                  EnvironmentFile=-/etc/sysconfig/chronyd
                  ExecStart=/usr/sbin/chronyd $OPTIONS
                  ExecStartPost=/usr/libexec/chrony-helper update-daemon
                  PrivateTmp=yes
                  ProtectHome=yes
                  ProtectSystem=full
                  [Install]
                  WantedBy=multi-user.target
                enabled: false
                name: "chronyd.service"
              - name: "kubelet-dependencies.target"
                contents: |
                  [Unit]
                  Description=Dependencies necessary to run kubelet
                  Documentation=https://github.com/openshift/machine-config-operator/
                  Requires=basic.target network-online.target
                  Wants=NetworkManager-wait-online.service crio-wipe.service
                  Wants=rpc-statd.service

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      要禁用 chronyd 的节点角色，如 master。

   2. 运行以下命令来创建 MachineConfig CR：

      $ oc create -f disable-chronyd.yaml

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