Add initial script file for 40x backup and restore example

Signed-off-by: Shail Pujan <[email protected]>

examples/local/401_backup_restore.sh

@@ -0,0 +1,72 @@
+#!/bin/bash
+
+# Copyright 2024 The Vitess Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# This script demonstrates how to create backups and restore tablets in Vitess.
+
+source ../common/env.sh
+
+# Start the topo server
+if [ "${TOPO}" = "zk2" ]; then
+	CELL=zone1 ../common/scripts/zk-up.sh
+elif [ "${TOPO}" = "consul" ]; then
+	CELL=zone1 ../common/scripts/consul-up.sh
+else
+	CELL=zone1 ../common/scripts/etcd-up.sh
+fi
+
+# Start vtctld
+CELL=zone1 ../common/scripts/vtctld-up.sh
+
+# Initialize the keyspace for backup/restore
+if vtctldclient GetKeyspace backup_restore > /dev/null 2>&1 ; then
+	# Keyspace exists
+	vtctldclient SetKeyspaceDurabilityPolicy --durability-policy=semi_sync backup_restore || fail "Failed to set durability policy"
+else
+	# Create the keyspace
+	vtctldclient CreateKeyspace --sidecar-db-name="_vt" --durability-policy=semi_sync backup_restore || fail "Failed to create keyspace"
+fi
+
+# Start mysqlctl and vttablets
+for i in 200 201 202; do
+	CELL=zone1 TABLET_UID=$i ../common/scripts/mysqlctl-up.sh &
+done
+sleep 2
+wait
+echo "MySQL servers started."
+
+# Start vttablets
+for i in 200 201 202; do
+	CELL=zone1 KEYSPACE=backup_restore TABLET_UID=$i ../common/scripts/vttablet-up.sh
+done
+
+# Wait for a healthy primary tablet
+wait_for_healthy_shard backup_restore 0 || exit 1
+
+# Apply schema and vschema
+vtctldclient ApplySchema --sql-file create_backup_schema.sql backup_restore || fail "Failed to apply schema"
+vtctldclient ApplyVSchema --vschema-file vschema_backup.json backup_restore || fail "Failed to apply vschema"
+
+# Backup the primary tablet (tablet 200)
+vtctldclient Backup zone1-0000000200 || fail "Backup failed"
+
+# Restore tablet 201 from backup
+vtctldclient RestoreFromBackup zone1-0000000201 || fail "Restore failed"
+
+# Verify backup exists
+vtctldclient GetBackups backup_restore/0 || fail "No backups found"
+
+# Complete
+echo "Backup and Restore example completed successfully."