Scale Down Openshift Deployed Services Quickly
I recently had to decommission a couple of live services which meant disabling certain aspects before the production region was decomissioned by others. This however left pre-production still running in two regions which equated to about 2*2*35=140 services that I had to shutdown. Using the openshift UI is too slow and clunky so I opted for the right way which is to use the oc cli.
The following script assumes one has logged into the correct openshift environment and switched to the appropriate project or namespace. It queries for a list of deployment objects, extracts the name before iterating over the list scaling each down to zero pods.
#!/bin/bash
deployments=`oc get dc -o template --template '{{range .items}}{{.metadata.name}}{{"\n"}}{{end }}'`
for dc in "${deployments[@]}"
do
# echo -e ${dc}
# scale down app to 0
oc scale dc ${dc} --replicas=0
done