<div dir="ltr">hello, you should put cluster to maintenance mode<br>
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</div><div class="wps_signature">Sent from my MI 5</div><div class="wps_quotion">On Attila Megyeri <amegyeri@minerva-soft.com>, Oct 12, 2017 6:55 PM wrote:<br type="attribution"><blockquote class="quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><p></p><html><head><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"><meta name="Generator" content="Microsoft Word 15 (filtered medium)"><style><!--
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--></style></head><body lang="HU" link="#0563C1" vlink="#954F72"><div class="WordSection1"><p class="MsoNormal"><span lang="EN-US">Hi all,</span></p><p class="MsoNormal"><span lang="EN-US"> </span></p><p class="MsoNormal"><span lang="EN-US">What is the recommended mysql server upgrade methodology in case of an active/passive DRBD storage?</span></p><p class="MsoNormal"><span lang="EN-US">(Ubuntu is the platform)</span></p><p class="MsoNormal"><span lang="EN-US"> </span></p><p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><span lang="EN-US"><span style="mso-list:Ignore">1)<span style="font:7.0pt "Times New Roman""> </span></span></span><span lang="EN-US">On the passive node the mysql data directory is not mounted, so the backup fails (some postinstall jobs will attempt to perform manipulations on certain files in the data directory).</span></p><p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo1"><span lang="EN-US"><span style="mso-list:Ignore">2)<span style="font:7.0pt "Times New Roman""> </span></span></span><span lang="EN-US">If the upgrade is done on the active node, it will restart the service (with the service restart, not in a crm managed fassion…), which is not a very good option (downtime in a HA solution). Not to mention, that it will update some files in the mysql data directory, which can cause strange issues if the A/P pair is changed – since on the other node the program code will still be the old one, while the data dir is already upgraded.</span></p><p class="MsoNormal"><span lang="EN-US"> </span></p><p class="MsoNormal"><span lang="EN-US">Any hints are welcome!</span></p><p class="MsoNormal"><span lang="EN-US"> </span></p><p class="MsoNormal"><span lang="EN-US">Thanks,</span></p><p class="MsoNormal"><span lang="EN-US">Attila</span></p><p class="MsoNormal"><span lang="EN-US"> </span></p></div></body></html></blockquote></div>