Script for node drain dev

muo_nodedrainsetup.sh

#!/bin/bash

# setup test app from e2e
oc new-project guestbook

# pull guestbook from e2e
curl https://raw.githubusercontent.com/openshift/osde2e/main/assets/workloads/e2e/guestbook/frontend-deployment.yaml | oc apply -f -
curl https://raw.githubusercontent.com/openshift/osde2e/main/assets/workloads/e2e/guestbook/frontend-service.yaml | oc apply -f -
curl https://raw.githubusercontent.com/openshift/osde2e/main/assets/workloads/e2e/guestbook/redis-master-deployment.yaml | oc apply -f -
curl https://raw.githubusercontent.com/openshift/osde2e/main/assets/workloads/e2e/guestbook/redis-master-service.yaml | oc apply -f -
curl https://raw.githubusercontent.com/openshift/osde2e/main/assets/workloads/e2e/guestbook/redis-slave-deployment.yaml | oc apply -f -
curl https://raw.githubusercontent.com/openshift/osde2e/main/assets/workloads/e2e/guestbook/redis-slave-service.yaml | oc apply -f -

# apply PDB
cat <<EOF | oc apply -f - -n guestbook
apiVersion: policy/v1beta1
kind: PodDisruptionBudget
metadata:
  name: guestbook
spec:
  maxUnavailable: 0
  selector:
    matchLabels:
      app: guestbook
EOF

echo "patch PDB guestbook to cause failed draining PDB config"
oc patch -n guestbook deployment.apps/frontend -p '{"spec":{"replicas":1}}' --type=merge

# Add finalizer pod
cat <<EOF | oc apply -f - -n guestbook
apiVersion: v1
kind: Pod
metadata:
  name: busybox-sleep
  finalizers:
  - ingress.openshift.io/canttouchthis
spec:
  containers:
  - name: busybox
    image: busybox
    args:
    - sleep
    - "1000000"
EOF

# Create upgradeconfig at same version as cluster
CURRENT_VERSION=$(oc get clusterversion version -o json | jq -r '.status.history[].version')

oc adm groups add-users osd-sre-cluster-admins $(oc whoami)
echo "sleep for 10"
sleep 10

cat <<EOF | oc apply -f - -n openshift-managed-upgrade-operator
apiVersion: upgrade.managed.openshift.io/v1alpha1
kind: UpgradeConfig
metadata:
  name: example-upgrade-config
spec:
  type: "OSD"
  upgradeAt: "2020-01-01T00:00:00Z"
  proceed: true
  PDBForceDrainTimeout: 60
  desired:
    channel: "stable-4.4"
    force: false
    version: "${CURRENT_VERSION}"
EOF

echo "patch replica to 0 for local dev" 
oc patch -n openshift-managed-upgrade-operator deployment.apps/managed-upgrade-operator -p '{"spec":{"replicas":0}}' --type=merge

echo "patch upgrade config for lower PDB timeout"
oc patch -n openshift-managed-upgrade-operator upgradeconfig example-upgrade-config -p '{"spec":{"PDBForceDrainTimeout":1}}' --type=merge

echo "Summary"
oc get all -n guestbook
oc get all -n openshift-managed-upgrade-operator

# swtich to MUO
oc project openshift-managed-upgrade-operator

# Some help
echo 
echo "Update the SRE node drain manually"
echo oc edit cm managed-upgrade-operator-config -o yaml
oc get cm managed-upgrade-operator-config -o yaml | grep -w -A1 nodeDrain
echo
echo "Use this to terminate busybox if required"
echo oc patch pod -n guestbook busybox-sleep -p '{\"metadata\":{\"finalizers\":[]}}' --type=merge
echo "Use this to restore operator deployment"
echo oc patch -n openshift-managed-upgrade-operator deployment.apps/managed-upgrade-operator -p '{\"spec\":{\"replicas\":1}}' --type=merge

echo 
echo "You can run the operator locally as seen below and tail the output log for targeted node to capture specific logs"
echo 'UPGRADING=true OPERATOR_NAMESPACE=openshift-managed-upgrade-operator make run |& tee /tmp/nodedrain.log'
echo 'tail -f /tmp/nodedrain.log | grep $NODE'