I've taken over an IT job and I'm new to puppet so please forgive my ignorance.
I'm running puppet 3.7.4. The nodes that puppet manages are running MySQL 5.1.73. Management has asked me to upgrade MySQL on the nodes to 5.7.13.
I see that there is a modules/mysql directory. metadata.json has this identifying information:
"name": "puppetlabs-mysql",
"version": "2.1.0",
"summary": "Mysql module",
"author": "Puppet Labs",
"description": "Mysql module"
I've got a couple of general questions. I'm sure I'll have more over time.
1. How can I figure out how the current version of MySQL is installed on the agents? I'm guessing it's through yum but I'd like to find evidence that puppet is doing that. I imagine I can look through /var/log/messages on an agent but I'd like to understand how puppet is picking the version and doing the MySQL install.
2. What's a reasonable approach to upgrading MySQL and leaving a copy of the current version on the agents in case I need to revert back?
At this point I'm just hoping for some direction.
Thanks very much.
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