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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