Add Maxscale Cluster Support (#16)

Signed-off-by: SK Ali Arman <[email protected]>

Author: sheikh-arman

scripts/maxscale.sh

@@ -9,6 +9,15 @@ cat >>/etc/maxscale/maxscale.cnf <<EOL
 threads=1
 log_debug=1
 EOL
+#TODO: configuration sync: among maxscale nodes, when something done in a specific maxscale
+#https://mariadb.com/kb/en/mariadb-maxscale-2402-maxscale-2402-mariadb-maxscale-configuration-guide/#runtime-configuration-changes
+#if [ "${MAXSCALE_CLUSTER:-}" == "true"  ];then
+#  cat >>/etc/maxscale/maxscale.cnf <<EOL
+#config_sync_cluster  = ReplicationMonitor
+#config_sync_user     = maxscale_confsync
+#config_sync_password = '$MYSQL_ROOT_PASSWORD'
+#EOL
+#fi
 
 cat >>/etc/maxscale/maxscale.cnf.d/maxscale.cnf <<EOL
 # Auto-generated server list from environment
@@ -57,7 +66,11 @@ replication_user=repl
 replication_password='$MYSQL_ROOT_PASSWORD'
 EOL
 
-
+if [ "${MAXSCALE_CLUSTER:-}" == "true"  ];then
+  cat >>/etc/maxscale/maxscale.cnf.d/maxscale.cnf <<EOL
+cooperative_monitoring_locks=majority_of_running
+EOL
+fi
 cat >>/etc/maxscale/maxscale.cnf.d/maxscale.cnf <<EOL
 
 [RW-Split-Router]
@@ -71,6 +84,7 @@ master_failure_mode=fail_on_write
 transaction_replay=true
 slave_selection_criteria=ADAPTIVE_ROUTING
 master_accept_reads=true
+enable_root_user=true
 EOL
 
 cat >>/etc/maxscale/maxscale.cnf.d/maxscale.cnf <<EOL

scripts/std-replication-setup.sh

@@ -103,6 +103,24 @@ function create_maxscale_user() {
     fi
 }
 
+//TODO:
+#function create_maxscale_confsync_user() {
+#    log "INFO" "Checking whether maxscale user exist or not......"
+#    local mysql="$mysql_header --host=$localhost"
+#    # At first, ensure that the command executes without any error. Then, run the command again and extract the output.
+#    retry 120 ${mysql} -N -e "select count(host) from mysql.user where mysql.user.user='maxscale_confsync';" | awk '{print$1}'
+#    out=$(${mysql} -N -e "select count(host) from mysql.user where mysql.user.user='maxscale_confsync';" | awk '{print$1}')
+#    # if the user doesn't exist, crete new one.
+#    if [[ "$out" -eq "0" ]]; then
+#        log "INFO" "maxscale_confsync user not found. Creating new maxscale_confsync user........"
+#        retry 120 ${mysql} -N -e "SET SQL_LOG_BIN=0;CREATE USER 'maxscale_confsync'@'%' IDENTIFIED BY '$MYSQL_ROOT_PASSWORD';"
+#        retry 120 ${mysql} -N -e "SET SQL_LOG_BIN=0;GRANT SELECT, INSERT, UPDATE, CREATE ON mysql.maxscale_config TO maxscale_confsync@'%';"
+#        retry 120 ${mysql} -N -e "SET SQL_LOG_BIN=0;FLUSH PRIVILEGES;"
+#    else
+#        log "INFO" "maxscale_confsync user exists. Skipping creating new one......."
+#    fi
+#}
+
 function create_monitor_user() {
     log "INFO" "Checking whether monitor user exist or not......"
     local mysql="$mysql_header --host=$localhost"
@@ -114,8 +132,16 @@ function create_monitor_user() {
     if [[ "$out" -eq "0" ]]; then
         log "INFO" "Monitor user not found. Creating new monitor user........"
         retry 120 ${mysql} -N -e "SET SQL_LOG_BIN=0;CREATE USER 'monitor_user'@'%' IDENTIFIED BY '$MYSQL_ROOT_PASSWORD';"
-        retry 120 ${mysql} -N -e "SET SQL_LOG_BIN=0;GRANT REPLICATION CLIENT on *.* to 'monitor_user'@'%';"
-        retry 120 ${mysql} -N -e "SET SQL_LOG_BIN=0;GRANT SUPER, RELOAD on *.* to 'monitor_user'@'%';"
+        #mariadb 10.6+ change SUPER-> READ_ONLY ADMIN, REPLICATION CLIENT> SLAVE MONITOR
+        if [[ "$(echo -e "1:10.7\n$MARIADB_VERSION" | sort -V | tail -n1)" == "$MARIADB_VERSION" ]]; then
+          retry 120 ${mysql} -N -e "SET SQL_LOG_BIN=0;GRANT READ_ONLY ADMIN, RELOAD on *.* to 'monitor_user'@'%';"
+          retry 120 ${mysql} -N -e "SET SQL_LOG_BIN=0;GRANT SLAVE MONITOR ON *.* TO 'monitor_user'@'%';"
+          retry 120 ${mysql} -N -e "SET SQL_LOG_BIN=0;GRANT BINLOG ADMIN, REPLICATION MASTER ADMIN, REPLICATION SLAVE ADMIN ON *.* TO 'monitor_user'@'%';"
+        else
+          retry 120 ${mysql} -N -e "SET SQL_LOG_BIN=0;GRANT SUPER, RELOAD on *.* to 'monitor_user'@'%';"
+          retry 120 ${mysql} -N -e "SET SQL_LOG_BIN=0;GRANT REPLICATION CLIENT on *.* to 'monitor_user'@'%';"
+        fi
+
         retry 120 ${mysql} -N -e "SET SQL_LOG_BIN=0;FLUSH PRIVILEGES;"
     else
         log "INFO" "Monitor user exists. Skipping creating new one......."
@@ -210,6 +236,10 @@ create_maxscale_user
 # ensure monitor user
 create_monitor_user
 
+#TODO:
+# ensure maxscale_confsync user
+#create_maxscale_confsync_user
+
 while true; do
     kill -0 $pid
     exit="$?"