Added the initial script for the 40x example for backup and restore

examples/local/401_backup.sh

@@ -0,0 +1,44 @@
+# 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 takes backups of the 'customer' keyspace and all its shards.
+
+# Load common environment variables and functions
+source ../common/env.sh
+
+# Set keyspace and shard details for the 'customer' keyspace
+KEYSPACE="customer"
+SHARDS=("-80" "80-")
+
+# Ensure the keyspace and shards are healthy
+echo "Ensuring keyspace $KEYSPACE exists and shards are healthy..."
+for shard in "${SHARDS[@]}"; do
+    if ! wait_for_healthy_shard "$KEYSPACE" "$shard"; then
+        echo "Shard $shard is not healthy. Exiting..."
+        exit 1
+    fi
+done
+
+# Backup all shards of the customer keyspace
+for shard in "${SHARDS[@]}"; do
+    echo "Backing up shard $shard in keyspace $KEYSPACE..."
+    if vtctldclient BackupShard "$KEYSPACE/$shard"; then
+        echo "Backup succeeded for shard $shard."
+    else
+        echo "Backup failed for shard $shard."
+        exit 1
+    fi
+done
+
+echo "Backup process completed successfully for all shards in $KEYSPACE."

examples/local/402_list_backup.sh

@@ -0,0 +1,28 @@
+# 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.
+
+# Load common environment variables and functions
+source ../common/env.sh  # Import necessary environment variables and functions from a common script
+
+# Set keyspace and shard details for the 'customer' keyspace
+KEYSPACE="customer"  # Define the keyspace to work with
+SHARDS=("-80" "80-")  # Define the shards within the keyspace to list backups for
+
+# List backups for each shard
+for shard in "${SHARDS[@]}"; do  # Loop through each shard defined earlier
+    echo "Listing available backups for keyspace $KEYSPACE and shard $shard..."  # Log the start of the backup listing
+    vtctldclient GetBackups "$KEYSPACE/$shard" || echo "Failed to list backups for keyspace $KEYSPACE and shard $shard"  # Attempt to list backups; log failure if it occurs
+done
+
+echo "Backup listing process completed."  # Log completion of the backup listing process

examples/local/403_restore_from_backup.sh

@@ -0,0 +1,46 @@
+# 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 restores the first replica tablet from backups for the 'customer' keyspace.
+
+# Load common environment variables and functions
+source ../common/env.sh  # Import necessary environment variables and functions from a common script
+
+# Set keyspace and shard details for the 'customer' keyspace
+KEYSPACE="customer"  # Define the keyspace to work with
+SHARDS=("-80" "80-")  # Define the shards within the keyspace to restore
+
+# Restore all shards of the customer keyspace from backups
+for shard in "${SHARDS[@]}"; do  # Loop through each shard defined earlier
+    echo "Finding replica tablets for shard $shard..."  # Log the start of the tablet search
+
+    # Fetch the list of replica tablets for the current shard
+    REPLICA_TABLETS=$(vtctldclient GetTablets --keyspace="$KEYSPACE" --shard="$shard" --tablet-type=replica | awk '{print $1}')  # Extract the first column containing tablet names
+    REPLICA_COUNT=$(echo "$REPLICA_TABLETS" | wc -l)  # Count the number of replica tablets found
+
+    # Check if any replica tablets were found
+    if [ "$REPLICA_COUNT" -lt 1 ]; then  # If the count is less than 1, no replicas were found
+        echo "No replica tablets found for shard $shard. Exiting..."  # Log a message and exit if none are found
+        exit 1  # Exit the script with an error code
+    fi
+
+    # Choose the first replica for restoration
+    RESTORE_TABLET=$(echo "$REPLICA_TABLETS" | head -n 1)  # Select the first replica tablet from the list
+    echo "Restoring tablet $RESTORE_TABLET from backup for shard $shard..."  # Log the restoration action
+
+    # Restore from backup and handle any failures
+    vtctldclient RestoreFromBackup "$RESTORE_TABLET" || fail "Restore failed for tablet $RESTORE_TABLET"  # Attempt to restore from backup and log an error message if it fails
+done
+
+echo "Restore process completed successfully for $KEYSPACE."  # Log completion of the restore process

test/local_example.sh

@@ -98,5 +98,5 @@ mysql --table < ../common/select_customer80-_data.sql
 
 ./306_down_shard_0.sh
 
-./401_teardown.sh
+./501_teardown.sh