[infra] Copycat db - Include pg_restore (#3352)

infra/copycat-db/Dockerfile

@@ -3,6 +3,12 @@ FROM ubuntu:latest
 RUN apt-get update && apt-get install -y curl gnupg
 RUN apt-get install -y tini
 
+# Install Postgres client (needed for restores, and for local testing)
+# https://www.postgresql.org/download/linux/ubuntu/
+#
+# We don't have specific dependencies on Postgres, so just use the latest.
+RUN apt-get update && apt-get -y install postgresql-client
+
 # Install SCW CLI
 # Latest release: https://github.com/scaleway/scaleway-cli/releases/latest
 RUN \

infra/copycat-db/src/backup.sh

@@ -18,9 +18,10 @@ EXPIRY="$(date -Iseconds --utc --date "@$EXPIRYS")"
 
 if test -z "$SCW_RDB_INSTANCE_ID"
 then
-    # A required SCW related environment variable hasn't been specified.
-    echo "Missing SCW_RDB_INSTANCE_ID"
-    exit 1
+    # A required SCW related environment variable hasn't been specified. This is
+    # expected when running the script locally for testing. Fallback to using
+    # pg_dump for creating the backup.
+    pg_dump -Fc ente_db > $BACKUP_FILE
 else
     # We need to export a backup first after creating it, before it can be
     # downloaded.