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nixos/services.mysql: fix wait for galera cluster sync to be done (#381333)

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Arne Keller 2025-03-10 18:22:47 +01:00 • committed by GitHub
commit e518fa2340
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1 changed files with 25 additions and 6 deletions
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31
nixos/modules/services/databases/mysql.nix
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@ -433,6 +433,25 @@ in
done
''}
${lib.optionalString isMariaDB ''
# If MariaDB is used in an Galera cluster, we have to check if the sync is done,
# or it will fail to init the database while joining, so we get in an broken non recoverable state
# so we wait until we have an synced state
if ${cfg.package}/bin/mysql -u ${superUser} -N -e "SHOW VARIABLES LIKE 'wsrep_on'" 2>/dev/null | ${lib.getExe' pkgs.gnugrep "grep"} -q 'ON'; then
echo "Galera cluster detected, waiting for node to be synced..."
while true; do
STATE=$(${cfg.package}/bin/mysql -u ${superUser} -N -e "SHOW STATUS LIKE 'wsrep_local_state_comment'" | ${lib.getExe' pkgs.gawk "awk"} '{print $2}')
if [ "$STATE" = "Synced" ]; then
echo "Node is synced"
break
else
echo "Current state: $STATE - Waiting for 1 second..."
sleep 1
fi
done
fi
''}
if [ -f ${cfg.dataDir}/mysql_init ]
then
# While MariaDB comes with a 'mysql' super user account since 10.4.x, MySQL does not
@ -447,10 +466,10 @@ in
# Create initial databases
if ! test -e "${cfg.dataDir}/${database.name}"; then
echo "Creating initial database: ${database.name}"
( echo 'create database `${database.name}`;'
( echo 'CREATE DATABASE IF NOT EXISTS `${database.name}`;'
${lib.optionalString (database.schema != null) ''
echo 'use `${database.name}`;'
echo 'USE `${database.name}`;'
# TODO: this silently falls through if database.schema does not exist,
# we should catch this somehow and exit, but can't do it here because we're in a subshell.
@ -469,7 +488,7 @@ in
${lib.optionalString (cfg.replication.role == "master") ''
# Set up the replication master
( echo "use mysql;"
( echo "USE mysql;"
echo "CREATE USER '${cfg.replication.masterUser}'@'${cfg.replication.slaveHost}' IDENTIFIED WITH mysql_native_password;"
echo "SET PASSWORD FOR '${cfg.replication.masterUser}'@'${cfg.replication.slaveHost}' = PASSWORD('${cfg.replication.masterPassword}');"
echo "GRANT REPLICATION SLAVE ON *.* TO '${cfg.replication.masterUser}'@'${cfg.replication.slaveHost}';"
@ -479,9 +498,9 @@ in
${lib.optionalString (cfg.replication.role == "slave") ''
# Set up the replication slave
( echo "stop slave;"
echo "change master to master_host='${cfg.replication.masterHost}', master_user='${cfg.replication.masterUser}', master_password='${cfg.replication.masterPassword}';"
echo "start slave;"
( echo "STOP SLAVE;"
echo "CHANGE MASTER TO MASTER_HOST='${cfg.replication.masterHost}', MASTER_USER='${cfg.replication.masterUser}', MASTER_PASSWORD='${cfg.replication.masterPassword}';"
echo "START SLAVE;"
) | ${cfg.package}/bin/mysql -u ${superUser} -N
''}