template.yaml

---
kind: "Template"
apiVersion: "v1"
metadata:
  name: "public-middleman-website"
  annotations:
    openshift.io/display-name: "Public Middleman Static Website"
    description: "Takes files created for static site generator Middleman (https://middlemanapp.com/) from a public source repo, builds them in Ruby, and deploys them in a PHP container."
    tags: "ruby,middleman"
    iconClass: "icon-shadowman"
    template.openshift.io/long-description: "This template defines resources needed to develop a Middleman application, including a build configuration and application deployment configuration."
    template.openshift.io/provider-display-name: "Red Hat, Inc."
message: "The following service(s) have been created in your project: ${NAME}."
labels:
  template: "middleman-website"
objects:
  - kind: "Service"
    apiVersion: "v1"
    metadata:
      name: "${NAME}"
      annotations:
        description: "Exposes and load balances the frontend application pods"
      labels:
        app: "${NAME}"
    spec:
      ports:
        - name: "https"
          port: 8443
          targetPort: 8080
      selector:
        name: "${NAME}"

  - kind: "Route"
    apiVersion: "v1"
    metadata:
      annotations:
        kubernetes.io/tls-acme: "true"
      name: "${NAME}"
      labels:
        app: "${NAME}"
    spec:
      host: "${APPLICATION_DOMAIN}"
      to:
        kind: "Service"
        name: "${NAME}"
        weight: 1

  - kind: "ImageStream"
    apiVersion: "v1"
    metadata:
      name: "stg1-${NAME}"
      annotations:
        description: "Keeps track of changes in the stg1-${NAME} application image"
      labels:
        app: "${NAME}"

  - kind: "ImageStream"
    apiVersion: "v1"
    metadata:
      name: "final-${NAME}"
      annotations:
        description: "Keeps track of changes in the final-${NAME} application image"
      labels:
        app: "${NAME}"

  - kind: "BuildConfig"
    apiVersion: "v1"
    metadata:
      name: "stg1-${NAME}"
      annotations:
        description: "Defines how to perform stage 1 build for ${NAME}"
      labels:
        app: "${NAME}"
    spec:
      nodeSelector:
      source:
        type: "Git"
        git:
          uri: "${SOURCE_REPOSITORY_URL}"
          ref: "${SOURCE_REPOSITORY_REF}"
        contextDir: "${CONTEXT_DIR}"
      strategy:
        type: "Source"
        sourceStrategy:
          incremental: true
          from:
            kind: "ImageStreamTag"
            namespace: "${NAMESPACE}"
            name: "ruby:2.3"
      output:
        to:
          kind: "ImageStreamTag"
          name: "stg1-${NAME}:latest"
      triggers:
        - type: "ImageChange"
        - type: "ConfigChange"
        - type: "GitHub"
          github:
            secret: "${GITHUB_WEBHOOK_SECRET}"

  - kind: "BuildConfig"
    apiVersion: "v1"
    metadata:
      name: "final-${NAME}"
      annotations:
        description: "Defines how to perform final build for ${NAME} before deployment"
      labels:
        app: "${NAME}"
    spec:
      nodeSelector:
      source:
        type: "Images"
        images:
          - from:
              kind: "ImageStreamTag"
              name: "stg1-${NAME}:latest"
            paths:
              - sourcePath: "/opt/app-root/src/build/."
                destinationDir: "."
      strategy:
        type: "Source"
        sourceStrategy:
          from:
            kind: "ImageStreamTag"
            namespace: "${NAMESPACE}"
            name: "php:7.0"
      output:
        to:
          kind: "ImageStreamTag"
          name: "final-${NAME}:latest"
      triggers:
        - imageChange:
            from:
              kind: ImageStreamTag
              name: 'stg1-${NAME}:latest'
          type: "ImageChange"
        - type: "ConfigChange"

  - kind: "DeploymentConfig"
    apiVersion: "v1"
    metadata:
      name: "${NAME}"
      annotations:
        description: "Defines how to deploy ${APPLICATION_DOMAIN}"
      labels:
        app: "${NAME}"
    spec:
      strategy:
        type: "Rolling"
      triggers:
        - type: "ImageChange"
          imageChangeParams:
            automatic: true
            containerNames:
              - "${NAME}"
            from:
              kind: "ImageStreamTag"
              name: "final-${NAME}:latest"
        - type: "ConfigChange"
      replicas: 1
      test: false
      selector:
        name: "${NAME}"
      template:
        metadata:
          name: "${NAME}"
          labels:
            name: "${NAME}"
            app: "${NAME}"
        spec:
          containers:
            - name: "${NAME}"
              ports:
                - containerPort: 8080
              readinessProbe:
                timeoutSeconds: 3
                initialDelaySeconds: 5
                httpGet:
                  path: "/${HEALTHCHECK_PATH}"
                  port: 8080
              livenessProbe:
                timeoutSeconds: 3
                initialDelaySeconds: 10
                httpGet:
                  path: "/${HEALTHCHECK_PATH}"
                  port: 8080
              resources:
                requests:
                  cpu: "${CPU_REQUEST}"
                  memory: "${MEMORY_REQUEST}"
                limits:
                  cpu: "${CPU_LIMIT}"
                  memory: "${MEMORY_LIMIT}"

  - kind: "HorizontalPodAutoscaler"
    apiVersion: "autoscaling/v1"
    metadata:
      name: "${NAME}"
      labels:
        app: "${NAME}"
    spec:
      scaleTargetRef:
        kind: DeploymentConfig
        name: "${NAME}"
        apiVersion: "v1"
      minReplicas: 2
      maxReplicas: 5
      targetCPUUtilizationPercentage: 75

parameters:
  - name: "NAME"
    displayName: "Application name"
    description: "The name assigned to all of the application components defined in this template."
    required: true

  - name: "APPLICATION_DOMAIN"
    displayName: "Application Hostname"
    required: true
    description: "The exposed hostname that will route to the PHP service."

  - name: "HEALTHCHECK_PATH"
    displayName: "URI path to a known, working web page."
    description: "The URI path to a known, working web page for testing liveness and readiness probes. Exclude leading '/'"
    required: true
    value: "index.html"

  - name: "SOURCE_REPOSITORY_URL"
    displayName: "Git Repository URL"
    description: "The URL of the repository with your application source code."
    required: true

  - name: "SOURCE_REPOSITORY_REF"
    displayName: "Git Reference"
    description: "Set this to a branch name, tag or other ref of your repository if you are not using the default branch."

  - name: "CONTEXT_DIR"
    displayName: "Context Directory"
    description: "Set this to the relative path to your project if it is not in the root of your repository."

  - name: "CPU_REQUEST"
    displayName: "CPU Request"
    description: "Requested amount of cpu the PHP container will use."
    required: true
    value: "50m"

  - name: "CPU_LIMIT"
    displayName: "CPU Limit"
    description: "Maximum amount of cpu the PHP container can use."
    required: true
    value: "500m"

  - name: "MEMORY_REQUEST"
    displayName: "Memory Request"
    description: "Requested amount of memory the PHP container will use."
    required: true
    value: "100Mi"

  - name: "MEMORY_LIMIT"
    displayName: "Memory Limit"
    description: "Maximum amount of memory the PHP container can use."
    required: true
    value: "512Mi"

  - name: "NAMESPACE"
    displayName: "Namespace"
    description: "The OpenShift Namespace where the Ruby s2i builder ImageStream resides."
    required: true
    value: "openshift"

  - name: "GITHUB_WEBHOOK_SECRET"
    displayName: "GitHub Webhook Secret"
    description: "A secret string used to configure the GitHub webhook."
    generate: "expression"
    from: "[a-zA-Z0-9]{40}"