Pare down dbUpgrade.sh

Author: DerekRoberts

db/dbUpgrade.sh

@@ -1,72 +1,34 @@
 #!/bin/bash
 #
-# Database Upgrade Script for OpenShift
-# Requirements
-# - Database template with a PersistentVolumeClaim with a different name from the existing one
-# - Database template loading a newer version of the database image
+# Database Upgrade/Migration Script for OpenShift
+# Usage:
+#   ./dbUpgrade.sh <old-deployment-name> <new-deployment-name>
+#
+# This script takes a database dump from the OLD_DEPLOYMENT and restores it into the NEW_DEPLOYMENT.
+# Requirements:
+# - Both deployments must have running pods with the correct labels.
+# - The database template should use a PersistentVolumeClaim with a different name for the new deployment.
+# - The new deployment should be ready to accept a restore.
 
 # Strict mode with verbose output
 set -euxo pipefail
 
-# Function - clone/replace the current database with a new name
-rename_deployment() {
-  local old_deployment="$1"
-  local new_deployment="$2"
-  local manifest="/tmp/${old_deployment}_$(date +%Y%m%d).json"  # Save in /tmp
-
-  # Check if the old deployment exists
-  if ! oc get deployment "${old_deployment}" &>/dev/null; then
-    echo "Deployment '${old_deployment}' does not exist. It must have already been renamed."
-    return 0
-  fi
-
-  # Export the existing deployment to JSON, update name, and clean metadata
-  oc get deployment "${old_deployment}" -o json \
-    | jq 'del(
-        .metadata.uid,
-        .metadata.resourceVersion,
-        .metadata.selfLink,
-        .metadata.creationTimestamp,
-        .metadata.generation,
-        .metadata.managedFields,
-        .status
-      ) | .metadata.name = "'${new_deployment}'"' \
-    > "${manifest}"
-
-  # Delete the old deployment
-  oc delete deployment "${old_deployment}"
-
-  # Apply the new deployment
-  oc apply -f "${manifest}"
-
-  # Clean up the temporary manifest file
-  rm -f "${manifest}"
-}
-
-if [[ $# -lt 1 ]]; then
-  echo "Usage: $0 <deployment-name>"
+if [[ $# -lt 2 ]]; then
+  echo "Usage: $0 <old-deployment-name> <new-deployment-name>"
   exit 1
 fi
 
 # Vars
-NEW_DEPLOYMENT=${1}
-OLD_DEPLOYMENT=${NEW_DEPLOYMENT}-prev
+OLD_DEPLOYMENT=${1}
+NEW_DEPLOYMENT=${2}
 DUMP_FILE_PATH=/tmp/backup.dump
 
-# Rename the deployment
-rename_deployment "${NEW_DEPLOYMENT}" "${OLD_DEPLOYMENT}"
-
-exit 0
-
-# Create and copy dump from the previous deployment
+# Create and copy dump from the old deployment
 OLD_POD=$(oc get po -l deployment=${OLD_DEPLOYMENT} -o name | head -n 1 | sed 's|pod/||')
 oc exec -it deployment/${OLD_DEPLOYMENT} -- bash -c "pg_dump -U \${POSTGRES_USER} -d \${POSTGRES_DB} -Fc -f ${DUMP_FILE_PATH} && ls -lh ${DUMP_FILE_PATH}"
 oc cp ${OLD_POD}:${DUMP_FILE_PATH} ${DUMP_FILE_PATH}
 ls -lh ${DUMP_FILE_PATH}
 
-# Delete the previous deployment (optional, uncomment if desired)
-# oc delete deployment "${OLD_DEPLOYMENT}"
-
 # Copy and restore dump to the new deployment
 NEW_POD=$(oc get po -l deployment=${NEW_DEPLOYMENT} -o name | head -n 1 | sed 's|pod/||')
 oc cp ${DUMP_FILE_PATH} ${NEW_POD}:${DUMP_FILE_PATH} -c fom