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I have Maxscale as a ReadWriteSplit for 3 Galera nodes. Node 1 is MASTER and other 2 are SLAVES.

I always create my users on master with:

mysql -e "CREATE DATABASE ${DB_NAME} CHARACTER SET utf8mb4 COLLATE utf8mb4_bin;"
mysql -e "CREATE USER IF NOT EXISTS '${DB_NAME}'@'10.1.0.%' IDENTIFIED BY '${DB_PASS}';"
mysql -e "GRANT ALL PRIVILEGES ON ${DB_NAME}.* TO '${DB_NAME}'@'10.1.0.%';"

Since any nod is not restarted (for MariaDB upgrades or other reasons) everything goes fine. But if the node is restarted, when any query hits the SLAVES Maxscale claims that:

error  : (2648715) [mariadbbackend] Invalid authentication message from backend 'sql3'. Error code: 1044, Msg : #42000Access denied for user '${DB_NAME}'@'10.1.0.%' to database '${DB_NAME}'
warning: (2648715) [readwritesplit] Refresh rate limit (once every 30 seconds) exceeded for load of users' table.

To fix it, at MASTER, I need to GRANT ALL PRIVILEGES again:

mysql -e "GRANT ALL PRIVILEGES ON ${DB_NAME}.* TO '${DB_NAME}'@'10.1.0.%';"

And the error stops. Is this a bug or I'm not doing things correctly?

ac_s_fer
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1 Answers1

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It looks like something going wrong at the database level. To test this, you could try connecting to that node manually after restarting it to see if it works or not.

markusjm
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