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Showing content from https://github.com/kubernetes-csi/livenessprobe/tree/release-1.1 below:

GitHub - kubernetes-csi/livenessprobe at release-1.1

The liveness probe is a sidecar container that exposes an HTTP /healthz endpoint, which serves as kubelet's livenessProbe hook to monitor health of a CSI driver.

The liveness probe uses Probe() call to check the CSI driver is healthy. See CSI spec for more information about Probe API call. Container Storage Interface (CSI)

This information reflects the head of this branch.

See hostpath-with-livenessprobe.yaml for example how to use the liveness probe with a CSI driver. Notice that actual livenessProbe is set on the container with the CSI driver. This way, Kubernetes restarts the CSI driver container when the probe fails. The liveness probe sidecar container only provides the HTTP endpoint for the probe and does not contain livenessProbe section by itself.

kind: Pod
spec:
  containers:
  # Container with CSI driver
  - name: hostpath-driver
    image: quay.io/k8scsi/hostpathplugin:v0.2.0
    # Defining port which will be used to GET plugin health status
    # 9808 is default, but can be changed.
    ports:
    - containerPort: 9808
      name: healthz
      protocol: TCP
    # The probe
    livenessProbe:
      failureThreshold: 5
      httpGet:
        path: /healthz
        port: healthz
      initialDelaySeconds: 10
      timeoutSeconds: 3
      periodSeconds: 2
    volumeMounts:
    - mountPath: /csi
      name: socket-dir
    # ...
 # The liveness probe sidecar container
 - name: liveness-probe
    imagePullPolicy: Always
    volumeMounts:
    - mountPath: /csi
      name: socket-dir
    image: quay.io/k8scsi/livenessprobe:v1.1.0
    args:
    - --csi-address=/csi/csi.sock
    volumeMounts:
    - mountPath: /csi
      name: socket-dir
    # ...

• --csi-address <path to CSI socket>: This is the path to the CSI driver socket inside the pod that the external-provisioner container will use to issue CSI operations (/run/csi/socket is used by default).

• --health-port <number>: TCP ports for listening for HTTP requests (default "9808")

• --probe-timeout <duration>: Maximum duration of single Probe() call (default "1s").

• All glog / klog arguments are supported, such as -v <log level> or -alsologtostderr.

• --connection-timeout <duration>: This option was used to limit establishing connection to CSI driver. Currently, the option does not have any effect and the external-provisioner tries to connect to CSI driver socket indefinitely. It is recommended to run ReadinessProbe on the driver to ensure that the driver comes up in reasonable time.

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