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This is an Ansible MySQL Slave Reseed Playbook - Proof of Concept

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dbtraining002 is the master and dbtraining003 is the slave in this Ansible Playbook.

What is needed:

  • You have both servers in your ansible hosts file.
  • You have tested your connections to both servers with ansible.
  • MySQL setup and running, as this is just a reseed playbook.
  • A var yml file to store your passwords. example: mysql_repl_pass and mysql_root_pass.
*Note:* There is a problem with the error handling in the Ansible mysql_replication.py extras
module. 

In order to use the mysql_replication module, 
you have to change the way it works with MySQL passwords from a script, from the command line.


*/usr/local/Cellar/ansible/1.9.**4/libexec/lib/python2.7/site-*
*packages/ansible/modules/**extras/database/mysql/mysql_**replication.py*

320:        warnings.filterwarnings('ignore', category=MySQLdb.Warning)
321:        #warnings.filterwarnings('error', category=MySQLdb.Warning)

I had to use ignore instead of the original line 321 error.

Directory layout: Example:

playbooks | vars --> main.yml file

run usage:

  • Validate your hosts first:

ansible-playbook playbooks/db_reseed-innobackupex.yml --list-hosts

This will also let you know, if any spacing or syntax options ansible does not like. It's main function is to list the affected hosts.

  • When comfortable with the playbook run it:

ansible-playbook playbooks/db_reseed-innobackupex.yml

I like to log into both servers to monitor the progress, as well.

  • On the Master

while :; do ps -ef | grep -i ansible | grep -v grep; sleep 3; done

  • On the Slave:

while :; do ls -lhrt /db/backup/* ; sleep 3; done

Just so I can see the backup is in progress of transfering. This playbook worked, but more testing is needed. Largest database size tested 2G; not that big. This was just a proof of concept for me.

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