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<div id="magicdomid2" class="ace-line"><span class="">All,</span></div>
<div id="magicdomid3" class="ace-line"><br>
</div>
<div id="magicdomid4" class="ace-line"><span class="">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).</span></div>
<div id="magicdomid5" class="ace-line"><br>
</div>
<div id="magicdomid6" class="ace-line"><span class="">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.</span></div>
<div id="magicdomid7" class="ace-line"><br>
</div>
<div id="magicdomid8" class="ace-line"><span class="">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.</span></div>
<div id="magicdomid9" class="ace-line"><br>
</div>
<div id="magicdomid10" class="ace-line"><span class="">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.</span></div>
<div id="magicdomid11" class="ace-line"><br>
</div>
<div id="magicdomid12" class="ace-line"><span class="">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.</span></div>
<div id="magicdomid13" class="ace-line"><br>
</div>
<div id="magicdomid14" class="ace-line"><span class="b"><b>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.</b></span></div>
<div id="magicdomid15" class="ace-line"><br>
</div>
<div id="magicdomid16" class="ace-line"><span class="">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.</span></div>
<div class="ace-line"><span class=""><br>
</span></div>
<div class="ace-line"><span class="">Thanks!<br>
</span></div>
<pre class="moz-signature" cols="72">--
Ethan Hampton
Student Systems Engineer
Oregon State University | Open Source Lab</pre>
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