pyrox.dev
nixos/services.mysql: fix wait for galera cluster sync to be done (#381333)
authored by Arne Keller and committed by GitHub e518fa23 00604c4f
+25
-6
nixos/modules/services/databases/mysql.nix
+25
-6
nixos/modules/services/databases/mysql.nix
···
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done
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''}
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if [ -f ${cfg.dataDir}/mysql_init ]
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then
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# While MariaDB comes with a 'mysql' super user account since 10.4.x, MySQL does not
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# Create initial databases
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if ! test -e "${cfg.dataDir}/${database.name}"; then
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echo "Creating initial database: ${database.name}"
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-
( echo 'create database `${database.name}`;'
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${lib.optionalString (database.schema != null) ''
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-
echo 'use `${database.name}`;'
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# TODO: this silently falls through if database.schema does not exist,
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# we should catch this somehow and exit, but can't do it here because we're in a subshell.
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${lib.optionalString (cfg.replication.role == "master") ''
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# Set up the replication master
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( echo "use mysql;"
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echo "CREATE USER '${cfg.replication.masterUser}'@'${cfg.replication.slaveHost}' IDENTIFIED WITH mysql_native_password;"
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echo "SET PASSWORD FOR '${cfg.replication.masterUser}'@'${cfg.replication.slaveHost}' = PASSWORD('${cfg.replication.masterPassword}');"
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echo "GRANT REPLICATION SLAVE ON *.* TO '${cfg.replication.masterUser}'@'${cfg.replication.slaveHost}';"
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${lib.optionalString (cfg.replication.role == "slave") ''
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# Set up the replication slave
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( echo "stop slave;"
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echo "change master to master_host='${cfg.replication.masterHost}', master_user='${cfg.replication.masterUser}', master_password='${cfg.replication.masterPassword}';"
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echo "start slave;"
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) | ${cfg.package}/bin/mysql -u ${superUser} -N
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''}
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···
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done
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''}
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${lib.optionalString isMariaDB ''
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# If MariaDB is used in an Galera cluster, we have to check if the sync is done,
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# or it will fail to init the database while joining, so we get in an broken non recoverable state
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# so we wait until we have an synced state
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if ${cfg.package}/bin/mysql -u ${superUser} -N -e "SHOW VARIABLES LIKE 'wsrep_on'" 2>/dev/null | ${lib.getExe' pkgs.gnugrep "grep"} -q 'ON'; then
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echo "Galera cluster detected, waiting for node to be synced..."
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while true; do
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STATE=$(${cfg.package}/bin/mysql -u ${superUser} -N -e "SHOW STATUS LIKE 'wsrep_local_state_comment'" | ${lib.getExe' pkgs.gawk "awk"} '{print $2}')
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if [ "$STATE" = "Synced" ]; then
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echo "Node is synced"
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break
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else
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echo "Current state: $STATE - Waiting for 1 second..."
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sleep 1
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fi
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done
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fi
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''}
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+
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if [ -f ${cfg.dataDir}/mysql_init ]
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then
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# While MariaDB comes with a 'mysql' super user account since 10.4.x, MySQL does not
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# Create initial databases
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if ! test -e "${cfg.dataDir}/${database.name}"; then
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echo "Creating initial database: ${database.name}"
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+
( echo 'CREATE DATABASE IF NOT EXISTS `${database.name}`;'
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${lib.optionalString (database.schema != null) ''
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echo 'USE `${database.name}`;'
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# TODO: this silently falls through if database.schema does not exist,
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# we should catch this somehow and exit, but can't do it here because we're in a subshell.
···
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${lib.optionalString (cfg.replication.role == "master") ''
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# Set up the replication master
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( echo "USE mysql;"
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echo "CREATE USER '${cfg.replication.masterUser}'@'${cfg.replication.slaveHost}' IDENTIFIED WITH mysql_native_password;"
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echo "SET PASSWORD FOR '${cfg.replication.masterUser}'@'${cfg.replication.slaveHost}' = PASSWORD('${cfg.replication.masterPassword}');"
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echo "GRANT REPLICATION SLAVE ON *.* TO '${cfg.replication.masterUser}'@'${cfg.replication.slaveHost}';"
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${lib.optionalString (cfg.replication.role == "slave") ''
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# Set up the replication slave
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( echo "STOP SLAVE;"
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echo "CHANGE MASTER TO MASTER_HOST='${cfg.replication.masterHost}', MASTER_USER='${cfg.replication.masterUser}', MASTER_PASSWORD='${cfg.replication.masterPassword}';"
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echo "START SLAVE;"
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) | ${cfg.package}/bin/mysql -u ${superUser} -N
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''}
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