[SAC] [Hosting] mysql1-vip (mysql1/mysql2) 5.6 -> 5.7 Upgrade | June 6th, 2022 17:00-20:00 UTC

[Ethan Hampton]

All,

We will be upgrading one of our MySQL clusters (mysql1-vip 
(mysql1/mysql2)) Monday, June 6th, 2022 between 17:00-20:00 UTC 
(10am-1pm PDT).

Just prior to the upgrade (9am PDT), we will be running a backup of the 
cluster. We have tested that the backup can be completed without a read 
lock on the cluster. We have several contingencies in place to allow 
continued use during the backup. As a result, we expect no downtime from 
this backup operation.

We are upgrading MySQL (Percona) from 5.6 to 5.7. This is the next step 
towards managing the cluster under Chef and upgrading to a modern OS 
version. Expect more maintenance on this cluster in the near future.

This will result in up to 20 minutes of downtime in the middle of the 
window as we fail-over the cluster. We estimate that the actual downtime 
will be far less than that bound.

MySQL 5.7 increases the 'strictness' of the default `sql_mode` used. We 
will keep the configuration used by MySQL 5.6 during this upgrade, 
however we plan to migrate to the default MySQL 5.7 setting at a future 
date.

*If you are using the vip1 cluster, please make sure you are using the 
mysql1-vip.osuosl.org address instead of mysql1/2.osuosl.org directly or 
additional outages will occur.*

We have tested this upgrade in a separate environment and believe that 
it will have minimal impact to projects on the cluster. If you have any 
questions or concerns, please let us know. We'll be in #osuosl on Libera 
Chat during the upgrade in case any one needs to contact us directly.

Thanks!

-- 
Ethan Hampton
Student Systems Engineer
Oregon State University | Open Source Lab
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