apiVersion: v1
kind: ConfigMap
metadata:
  name: probes
data:
  readinessprobe.sh: |-
    #!/bin/bash

    # This script is used to check the readiness of a POD.
    # If a pod works fine the script exits with exit code 0
    # otherwise, a non exit code is used.
    #
    # Add the following (or similar) code to the helm chart
    # files in order to use it.
    #
    #   readinessProbe:
    #     periodSeconds: 3
    #     successThreshold: 1
    #     failureThreshold: 2
    #     initialDelaySeconds: 30
    #     timeoutSeconds: 5
    #     exec:
    #      command:
    #         - /bin/bash
    #         - /probes/readinessprobe.sh
    #
    # Consider various tests such as availability of certain filesystems, environment variables
    # or connectivity/responses from/to (web)servers.

    function probe_log() {
        echo "$( date +%D-%T ): ${1}" > /proc/1/fd/1
        exit 1
        }
    #
    # Debug checks:
    #
    # Report a NOT READY status if the file /tmp/notready does exist:
    cat /tmp/notready > /dev/null 2>&1 && probe_log "File /tmp/notready exists"

    # Report A NOT READY status if the file /etc/passwd does NOT exist:
    cat /etc/passwd > /dev/null 2>&1 || probe_log "File /etc/passwd does not exist"

    # Check if the following filesystem exist.
    df /dev > /dev/null 2>&1 || probe_log "Filesystem /dev not found"

    # If we reached this point we can assume that everything is fine.
    # Exit with an okay status
    exit 0
  livenessprobe.sh: |-
    #!/bin/bash

    # This script is used to check the readiness of a POD.
    # If a pod works fine the script exits with exit code 0
    # otherwise, a non exit code is used.
    #
    # Add the following (or similar) code to the helm chart
    # files in order to use it.
    #
    #   livenessProbe:
    #     periodSeconds: 1
    #     successThreshold: 1
    #     failureThreshold: 2
    #     initialDelaySeconds: 30
    #     timeoutSeconds: 5
    #     exec:
    #       command:
    #       - /bin/bash
    #       - /probes/livenessprobe.sh
    #
    # Consider various tests such as availability of certain filesystems, environment variables
    # or connectivity/responses from/to (web)servers.

    function probe_log() {
        echo "$( date +%D-%T ): ${1}" > /proc/1/fd/1
        exit 1
        }
    #
    # Debug checks:
    #
    # Report a NOT ALIVE status if the file /tmp/notready does exist:
    cat /tmp/notalive > /dev/null 2>&1 && probe_log "File /tmp/notalive exists"

    # Check if the following filesystem exist.
    df /dev > /dev/null 2>&1 || probe_log "Filesystem /dev not found"

    # If we reached this point we can assume that everything is fine.
    # Exit with an okay status
    exit 0
---
apiVersion: v1
kind: Service
metadata:
  labels:
    app: probes
  name: probes
spec:
  ports:
  - name: web
    port: 8080
    protocol: TCP
    targetPort: 9876
  selector:
    app: probes
  type: ClusterIP
---
apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: probes
  name: probes
spec:
  replicas: 1
  selector:
    matchLabels:
      app: probes
  template:
    metadata:
      labels:
        app: probes
    spec:
      containers:
      - image: mhausenblas/simpleservice:0.5.0
      # https://github.com/mhausenblas/simpleservice
        name: simpleservice
        resources:
          limits:
            memory: "500Mi"
            cpu: 200m
        livenessProbe:
          periodSeconds: 1
          successThreshold: 1
          failureThreshold: 2
          initialDelaySeconds: 5
          timeoutSeconds: 5
          exec:
            command:
              - /bin/bash
              - /probes/livenessprobe.sh
        readinessProbe:
          periodSeconds: 3
          successThreshold: 1
          failureThreshold: 2
          initialDelaySeconds: 5
          timeoutSeconds: 5
          exec:
           command:
              - /bin/bash
              - /probes/readinessprobe.sh
        volumeMounts:
        - name: probes
          mountPath: "/probes"
          readOnly: true
      volumes:
        - name: probes
          configMap:
            name: probes