Hi guys, I'm newbie to high availability clusters, pls excuse me - learning tools stack (corosync & pacemaker).
In fact, our high availability solution is based on Debian 9.x (pacemaker 1.x and corosync 2.x) - which worked as expected. This cluster application uses postgresql 9.6 and Wildfly 10.x I've tried to migrate this solution to Debian 10 (pacemaker 2.x & corosync 3.x), but unfortunately we have got hiccups (described below). Debian 10 based cluster using Postgresql 11 & Wildfly (10.x) and we have got data sync issues between two nodes. If I reboot master node after it comes back it joins the cluster in a usual way and databases of both nodes are immediately gets in sync (As many times I do, it works as expected). But if plug out the network cable of the master node then other node becomes master and application is operable and as soon as I plugin in the network cable back to the master node then database sync issues occur. Have tried to find the reason but no success so far... Attached is my template.cib . Would appreciate any pointers as what may be the reason behind this! Thank you in advance! Regards, Jaikumar
template.cib
Description: template.cib
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