We have a PHP-application with the AWS RDS MariaDB as a backend. On the previously used 10.0 version all was good, but right after we upgraded to the MariaDB 10.2 – got errors during tests: PDOException: SQLSTATE[22001]: String data, right truncated: 1406 Data too long for column ‘name’ at row 1 in /data/projects/projectname/vendor/yiisoft/yii2/db/Command.php:1290 The first… Read More »
We have AWS RDS with MariaDB. The error below and its solution aren’t specific to AWS RDS and MariaDB. The next error appears during attempt to kill() a thread in MySQL: [simterm] MariaDB [(none)]> kill 759; ERROR 1095 (HY000): You are not owner of thread 759 [/simterm] The solution is to use the mysql.rds_kill() procedure… Read More »
We have a TestRail installation but suddenly lose its Admin user password. The Reset Password says that “Email sending failed” although email was configured and users are able to get emails from the server. Also, the log /var/www/testrail.example.com/logs/log-2019-05-13.php didn’t says anything so will reset password in another way – by update this TestRail MySQL database… Read More »
The next post from the Redis replication series. Previous parts: Redis: replication, part 1 – an overview. Replication vs Sharding. Sentinel vs Cluster. Redis topology. Redis: replication, part 2 – Master-Slave replication, and Redis Sentinel Redis: replication, part 3 – redis-py and work with Redis Sentinel from Python The task now is to write an… Read More »
Originally, in a Sentinel’s configs, I have used the bind 0.0.0.0 to make them accessible from external hosts. Because of this when I started rolling out this setup on a real environment faced with an issue when Sentinels could not determine a Master host and other Sentinel hosts. In this post – such an issue… Read More »
This story happened on 10/06/2017, adding this post in English now. The original post (Rus) was written almost right after the well-known Not a Petya attack in Ukraine – that’s why it’s used in the title. I had a new project assigned to me. When I started its existing setup investigation – was just… Read More »
Have a new Redis service which has to run alongside with one already existing During starting this new service – it fails with the Can’t open the log file: Read-only file system error, although /var/log and log file itself have correct permissions. The root cause was not very obvious so in this post –… Read More »
Still on the subject about Redis replication and Redis Sentinel – a couple of examples using the redis-py library for Python. Previous series posts: Redis: replication, part 1 – an overview. Replication vs Sharding. Sentinel vs Cluster. Redis topology Redis: replication, part 2 – Master-Slave replication, and Redis Sentinel All Redis clients for Python can be… Read More »
The first part – Redis: replication, part 1 – overview. Replication vs Sharding. Sentinel vs Cluster. Redis topology. The next part – Redis: replication, part 3 redis-py and work with Redis Sentinel from Python. The whole story was started when we decided to get rid of memcached. Currently, we have memcahced and Redis running on… Read More »
CodeProject Initially, it was planned to write one small post with an example how to create a Redis replication but as I read more and more details – I wanted to describe more and more about it, so eventually I split this post into two parts. In this one – some quick overview, a brief… Read More »