290 lines
7.9 KiB
Smarty
Executable File
290 lines
7.9 KiB
Smarty
Executable File
#!/bin/bash
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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# Capture the user's command line arguments
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ARGS=("$@")
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if [[ -s /tmp/restore_main.sh ]]; then
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source /tmp/restore_main.sh
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else
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echo "File /tmp/restore_main.sh does not exist."
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exit 1
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fi
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# Export the variables needed by the framework
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export DB_NAME="mariadb"
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export DB_NAMESPACE=${MARIADB_POD_NAMESPACE}
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export ARCHIVE_DIR=${MARIADB_BACKUP_BASE_DIR}/db/${DB_NAMESPACE}/${DB_NAME}/archive
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RESTORE_USER='restoreuser'
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RESTORE_PW=$(pwgen 16 1)
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RESTORE_LOG='/tmp/restore_error.log'
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rm -f $RESTORE_LOG
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# This is for commands which require admin access
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MYSQL="mysql \
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--defaults-file=/etc/mysql/admin_user.cnf \
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--host=$MARIADB_SERVER_SERVICE_HOST \
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--connect-timeout 10"
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# This is for commands which we want the temporary "restore" user
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# to execute
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RESTORE_CMD="mysql \
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--user=${RESTORE_USER} \
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--password=${RESTORE_PW} \
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--host=$MARIADB_SERVER_SERVICE_HOST \
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--connect-timeout 10"
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# Get a single database data from the SQL file.
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# $1 - database name
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# $2 - sql file path
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current_db_desc() {
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PATTERN="-- Current Database:"
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sed -n "/${PATTERN} \`$1\`/,/${PATTERN}/p" $2
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}
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#Return all database from an archive
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get_databases() {
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TMP_DIR=$1
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DB_FILE=$2
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if [[ -e ${TMP_DIR}/db.list ]]
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then
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DBS=$(cat ${TMP_DIR}/db.list )
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else
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DBS=" "
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fi
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echo $DBS > $DB_FILE
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}
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# Extract all tables of a database from an archive and put them in the requested
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# file.
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get_tables() {
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DATABASE=$1
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TMP_DIR=$2
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TABLE_FILE=$3
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SQL_FILE=mariadb.$MARIADB_POD_NAMESPACE.all.sql
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if [[ -e $TMP_DIR/$SQL_FILE ]]; then
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current_db_desc ${DATABASE} ${TMP_DIR}/${SQL_FILE} \
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| grep "^CREATE TABLE" | awk -F '`' '{print $2}' \
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> $TABLE_FILE
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else
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# Error, cannot report the tables
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echo "No SQL file found - cannot extract the tables"
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return 1
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fi
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}
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# Extract all rows in the given table of a database from an archive and put
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# them in the requested file.
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get_rows() {
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DATABASE=$1
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TABLE=$2
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TMP_DIR=$3
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ROW_FILE=$4
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SQL_FILE=mariadb.$MARIADB_POD_NAMESPACE.all.sql
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if [[ -e $TMP_DIR/$SQL_FILE ]]; then
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current_db_desc ${DATABASE} ${TMP_DIR}/${SQL_FILE} \
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| grep "INSERT INTO \`${TABLE}\` VALUES" > $ROW_FILE
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else
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# Error, cannot report the rows
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echo "No SQL file found - cannot extract the rows"
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return 1
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fi
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}
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# Extract the schema for the given table in the given database belonging to
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# the archive file found in the TMP_DIR.
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get_schema() {
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DATABASE=$1
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TABLE=$2
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TMP_DIR=$3
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SCHEMA_FILE=$4
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SQL_FILE=mariadb.$MARIADB_POD_NAMESPACE.all.sql
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if [[ -e $TMP_DIR/$SQL_FILE ]]; then
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DB_FILE=$(mktemp -p /tmp)
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current_db_desc ${DATABASE} ${TMP_DIR}/${SQL_FILE} > ${DB_FILE}
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sed -n /'CREATE TABLE `'$TABLE'`'/,/'--'/p ${DB_FILE} > ${SCHEMA_FILE}
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if [[ ! (-s ${SCHEMA_FILE}) ]]; then
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sed -n /'CREATE TABLE IF NOT EXISTS `'$TABLE'`'/,/'--'/p ${DB_FILE} \
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> ${SCHEMA_FILE}
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fi
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rm -f ${DB_FILE}
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else
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# Error, cannot report the rows
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echo "No SQL file found - cannot extract the schema"
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return 1
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fi
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}
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# Create temporary user for restoring specific databases.
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create_restore_user() {
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restore_db=$1
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# Ensure any old restore user is removed first, if it exists.
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# If it doesn't exist it may return error, so do not exit the
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# script if that's the case.
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delete_restore_user "dont_exit_on_error"
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$MYSQL --execute="GRANT SELECT ON *.* TO ${RESTORE_USER}@'%' IDENTIFIED BY '${RESTORE_PW}';" 2>>$RESTORE_LOG
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if [[ "$?" -eq 0 ]]
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then
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$MYSQL --execute="GRANT ALL ON ${restore_db}.* TO ${RESTORE_USER}@'%' IDENTIFIED BY '${RESTORE_PW}';" 2>>$RESTORE_LOG
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if [[ "$?" -ne 0 ]]
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then
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cat $RESTORE_LOG
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echo "Failed to grant restore user ALL permissions on database ${restore_db}"
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return 1
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fi
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else
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cat $RESTORE_LOG
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echo "Failed to grant restore user select permissions on all databases"
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return 1
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fi
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}
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# Delete temporary restore user
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delete_restore_user() {
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error_handling=$1
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$MYSQL --execute="DROP USER ${RESTORE_USER}@'%';" 2>>$RESTORE_LOG
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if [[ "$?" -ne 0 ]]
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then
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if [ "$error_handling" == "exit_on_error" ]
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then
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cat $RESTORE_LOG
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echo "Failed to delete temporary restore user - needs attention to avoid a security hole"
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return 1
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fi
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fi
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}
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#Restore a single database
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restore_single_db() {
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SINGLE_DB_NAME=$1
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TMP_DIR=$2
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if [[ -z "$SINGLE_DB_NAME" ]]
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then
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echo "Restore single DB called but with wrong parameter."
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return 1
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fi
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SQL_FILE=mariadb.$MARIADB_POD_NAMESPACE.all.sql
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if [[ -f ${TMP_DIR}/$SQL_FILE ]]
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then
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# Restoring a single database requires us to create a temporary user
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# which has capability to only restore that ONE database. One gotcha
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# is that the mysql command to restore the database is going to throw
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# errors because of all the other databases that it cannot access. So
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# because of this reason, the --force option is used to prevent the
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# command from stopping on an error.
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create_restore_user $SINGLE_DB_NAME
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if [[ $? -ne 0 ]]
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then
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echo "Restore $SINGLE_DB_NAME failed create restore user."
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return 1
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fi
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$RESTORE_CMD --force < ${TMP_DIR}/$SQL_FILE 2>>$RESTORE_LOG
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if [[ "$?" -eq 0 ]]
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then
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echo "Database $SINGLE_DB_NAME Restore successful."
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else
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cat $RESTORE_LOG
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delete_restore_user "exit_on_error"
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echo "Database $SINGLE_DB_NAME Restore failed."
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return 1
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fi
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delete_restore_user "exit_on_error"
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if [[ $? -ne 0 ]]
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then
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echo "Restore $SINGLE_DB_NAME failed delete restore user."
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return 1
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fi
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if [ -f ${TMP_DIR}/${SINGLE_DB_NAME}_grant.sql ]
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then
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$MYSQL < ${TMP_DIR}/${SINGLE_DB_NAME}_grant.sql 2>>$RESTORE_LOG
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if [[ "$?" -eq 0 ]]
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then
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if ! $MYSQL --execute="FLUSH PRIVILEGES;"; then
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echo "Failed to flush privileges for $SINGLE_DB_NAME."
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return 1
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fi
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echo "Database $SINGLE_DB_NAME Permission Restore successful."
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else
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cat $RESTORE_LOG
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echo "Database $SINGLE_DB_NAME Permission Restore failed."
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return 1
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fi
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else
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echo "There is no permission file available for $SINGLE_DB_NAME"
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return 1
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fi
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else
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echo "There is no database file available to restore from"
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return 1
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fi
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return 0
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}
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#Restore all the databases
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restore_all_dbs() {
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TMP_DIR=$1
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SQL_FILE=mariadb.$MARIADB_POD_NAMESPACE.all.sql
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if [[ -f ${TMP_DIR}/$SQL_FILE ]]
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then
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$MYSQL < ${TMP_DIR}/$SQL_FILE 2>$RESTORE_LOG
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if [[ "$?" -eq 0 ]]
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then
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echo "Databases $( echo $DBS | tr -d '\n') Restore successful."
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else
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cat $RESTORE_LOG
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echo "Databases $( echo $DBS | tr -d '\n') Restore failed."
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return 1
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fi
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if [[ -f ${TMP_DIR}/grants.sql ]]
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then
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$MYSQL < ${TMP_DIR}/grants.sql 2>$RESTORE_LOG
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if [[ "$?" -eq 0 ]]
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then
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if ! $MYSQL --execute="FLUSH PRIVILEGES;"; then
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echo "Failed to flush privileges."
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return 1
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fi
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echo "Databases Permission Restore successful."
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else
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cat $RESTORE_LOG
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echo "Databases Permission Restore failed."
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return 1
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fi
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else
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echo "There is no permission file available"
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return 1
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fi
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else
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echo "There is no database file available to restore from"
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return 1
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fi
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return 0
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}
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# Call the CLI interpreter, providing the archive directory path and the
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# user arguments passed in
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cli_main ${ARGS[@]}
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