openshift-template.yml

---
kind: Template # Link https://docs.openshift.org/latest/dev_guide/templates.html
apiVersion: v1
metadata:
  name: #specify-template-name
  labels:
    template: #label. Prefer the same as metadata:name
    description: #description of your template
    tags: #optional: can be tagged for quick finding in OpenShift
objects:
  - kind: ImageStream
    apiVersion: v1
    metadata:
      name: #name of you docker image
    spec:
      dockerImageRepository: # specify docker image. Either name in your docker repository or reference to github.io
      # example: helloworld:latest which is visible from your `docker images` command
      # example: docker.io/fedora:latest
    tags:
      - name: latest
  - kind: DeploymentConfig
    apiVersion: v1
    metadata:
      name: # name of your DeploymentConfig. I would prefer to use the same as Template
    spec:
      strategy:
        type: Rolling
      triggers:
        - type: ImageChange
          imageChangeParams:
            automatic: true
            containerNames:
              - # Name of your container image. Taken from kind:ImageStream:name
            from:
              kind: ImageStreamTag
              name: # Specify what version do you need. Usually the latest like fedora:latest
              # Another one
              # kind: DockerImage
              # name: openshift/python-35-centos7:latest
      replicas: 1
      template:
        metadata:
          labels:
            name: # I would prefer to use the same as template:metadata:name
        spec:
          containers: # Container specification
            - env: # This is a list
              - name: REDIS_PASSWORD
                value: #define a value like ${REDIS_PASSWORD}
              name: # Name. Use the same as ImageStream
              image: # Use the same as kind:ImageStream:spec:dockerImageRepository
              imagePullPolicy: Never # Never means, user will care about it. Deleting means, Update the image automaticaly
              ports: # List ports which are used within a container on which service is listening.
                - containerPort: #Port1
                - containerPort: #Port2
              volumeMounts: # Can be repeated several times
                - mountPath: #Specify mount point on the container
                  name: #Unique name which will be used in kind:DeploymentConfig:spec:template:spec:volumes
          volumes: # Can be repeated
            - name: # The same as in template:spec:containers:volumeMounts:name
              emptyDir: #If you want to persist data, specify dir on your host system. Once container is down, your data will be in the directory. If you don't need it skip it. # For more information see https://docs.openshift.org/latest/dev_guide/persistent_volumes.html