All we need is an easy explanation of the problem, so here it is.
We need to resize the size (CPU and RAM) of two database servers having MySQL server 8: master and slave, but this operation implies that those machines will be restarted, And I think a restart of those machines might cause a problem in replication !
Is there a proper way to restart our machines without breaking the replication, Or I’m wrong about the fact that restarting the master and slave machines (OS) can break the replication ?
How to solve :
I know you bored from this bug, So we are here to help you! Take a deep breath and look at the explanation of your problem. We have many solutions to this problem, But we recommend you to use the first method because it is tested & true method that will 100% work for you.
You can stop and start master and slave in any order you want. It doesn’t matter, master first or slave first – for both stop and start.
The only requirement is master’s
expire_log_days config option should be bigger than maintenance duration. Otherwise master on start will rotate its binlogs faster than slave get a sync. Keep in mind that this variable should be set statically in the
my.cnf file, not dynamically via
SET GLOBAL expire_log_days = X;
Note: Use and implement method 1 because this method fully tested our system.
Thank you 🙂