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=password -p POSTGRESQL_DATABASE=books | oc create -f -