Red Hat Bugzilla – Bug 1006465
Orphaned pacemaker container resources can cause invalid transitions and resource failure
Last modified: 2014-06-18 00:27:04 EDT
Description of problem: Orphaned Container Resources (container resources deleted from the CIB before being stopped) can cause invalid pacemaker transition and resource failures. How reproducible: 50% of the time. This can be completely random. Basically if we get lucky, the resources within the orphaned container get stopped before the container is shut down, but there is nothing in the policy engine that strictly enforces this to happen in the correct order. Steps to Reproduce: 1. create a Container resource. 2. place resources within the container. 3. delete container resource from cib. Actual results: The container resource might get torn down before the resources within it, which will cause resources to fail when they shouldn't.... This entire problem occurs because it is impossible to stop a resource living within the container after the container is stopped. The policy engine must enforce the correct order during container shutdown. Expected results: Orphaned container resources are not stopped until all the resources running within them are stopped first. Additional info: This has already been fixed upstream. These 3 upstream patches are required to resolve this. https://github.com/davidvossel/pacemaker/commit/8b5ea1957e3281fa18940f4beb496482948f9dca https://github.com/davidvossel/pacemaker/commit/015f12fabd4d286add6b7e711108bf235485b552 https://github.com/davidvossel/pacemaker/commit/65ef2c7d8d931a149db3cf8be41225410a27e182
I have verified that the resource residing inside the container is correctly relocated when container is removed. duck-03# rpm -q resource-agents resource-agents-3.9.5-26.el7.x86_64 duck-03# pcs status ... Online: [ duck-03 ] Containers: [ duck-03-node01:R-duck-03-node01-lxc ] Full list of resources: virt-fencing (stonith:fence_ipmilan): Started duck-03 le-dummy (ocf::heartbeat:Dummy): Started duck-03-node01 R-duck-03-node01-lxc (ocf::heartbeat:VirtualDomain): Started duck-03 ... duck-03# pcs resource delete R-duck-03-node01-lxc Removing Constraint - location-R-duck-03-node01-lxc-duck-03-INFINITY Attempting to stop: R-duck-03-node01-lxc...Stopped Deleting Resource - R-duck-03-node01-lxc duck-03# pcs status ... Online: [ duck-03 ] Full list of resources: virt-fencing (stonith:fence_ipmilan): Started duck-03 le-dummy (ocf::heartbeat:Dummy): Started duck-03
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