Convert OpenShift DeploymentConfig to Kubernetes Deployment

convert-deploymentconfig-to-deployment.md

1. Change apiVersion from:

   - apiVersion: v1

   (or apiVersion: apps.openshift.io/v1)

   to:

   - apiVersion: apps/v1

2. Change kind from:

     kind: DeploymentConfig

   to:

     kind: Deployment

3. Change spec.selectors from:

       selector:
         name: ...

   to:

       selector:
         matchLabels:
           name: ...

4. Make sure spec.template.spec.containers.image is set, e.g.

           image: registry.access.redhat.com/rhscl/postgresql-${POSTGRESQL_VERSION}-rhel7
           imagePullPolicy: Always
   

5. Remove spec.triggers section entirely

Hehe, I got parsed template using oc process --local, then replaced DeploymentConfig to Deployment with jq:

jq '.items = [(.items[] | select(.kind == "DeploymentConfig") | .apiVersion="apps/v1" | .kind = "Deployment" | .spec.selector.matchLabels=.spec.template.metadata.labels | .spec.template.spec.containers[0].image=(.spec.triggers[] | select(.type=="ImageChange").imageChangeParams.from.name) | del(.spec.triggers) | del(.spec.strategy) | del(.spec.template.name)), (.items[] | select(.kind != "DeploymentConfig"))]'

I also had to remove spec.strategy and spec.test section entirely

If could be useful I wrote down a little script to automate the conversion https://gist.github.com/bomboclat/1c53b7e692b1df58af67598337cc2b88

Similar to what @kvaps wrote, I thought the DeploymentConfig to Deployment conversion could be done with yq, if working with YAML.