OpenShift template overview

An OpenShift template is a set of API resources that can be parameterized and processed to produce a list of objects for creation by OpenShift. A template can be processed to create any desired OpenShift objects (such as deployment configurations, build configurations, and so on). A template can also define a set of labels to apply to every object defined in the template. You can apply a template by using the CLI or the web console. For example, a template might contain two pods (an application and a database), a service, and a route. Once the template has been developed, you can reuse it.

 

 

Template syntax

Templates, like any other OpenShift resources, can be created from a raw YAML or JSON definition. An example is as follows:

# cat mytemplate.yaml
apiVersion: v1
kind: Template 
metadata:
  name: template1
objects: 
- apiVersion: v1
  kind: Pod
  metadata:
    name: app1
  spec:
    containers:
    - env:
      - name: SHOW_DATA
        value: ${SHOW_DATA} 
  ...