Create an application from OpenShift Template

Openshift comes with a set of default templates, you can use oc get templates -n openshift to show them

Each template contains specifc sections

• The objects section: defines a list of resources that will be created
• The parameters section: defines parameters that are used in the template objects

1 - Inspect the template file for the parameters

I export the postgresql-ephemeral to a yaml file using :  oc get template postgresql-ephemeral -o yaml -n openshift > postgresql.yaml 

Then inspect the yaml file  oc process --parameters -f <filename.yaml>

2 - Create the application using oc process

oc process -f postgresql.yaml -l app=mydb -p DATABASE_SERVICE_NAME=dbservice -p POSTGRESQL_USER=dbuser \

-p POSTGRESQL_PASSWORD=yourpassword -p POSTGRESQL_DATABASE=books | oc create -f -