svenvogel opened a new issue #3720: VM stopped/crashing while Migration with Maintenance Mode (KVM) URL: https://github.com/apache/cloudstack/issues/3720 <!-- Verify first that your issue/request is not already reported on GitHub. Also test if the latest release and master branch are affected too. Always add information AFTER of these HTML comments, but no need to delete the comments. --> ##### ISSUE TYPE <!-- Pick one below and delete the rest --> * Bug Report ##### COMPONENT NAME <!-- Categorize the issue, e.g. API, VR, VPN, UI, etc. --> ~~~ Management Server ~~~ ##### CLOUDSTACK VERSION <!-- New line separated list of affected versions, commit ID for issues on master branch. --> ~~~ Master but maybe 4.8 upwards ~~~ ##### CONFIGURATION <!-- Information about the configuration if relevant, e.g. basic network, advanced networking, etc. N/A otherwise --> ##### OS / ENVIRONMENT <!-- Information about the environment if relevant, N/A otherwise --> KVM with QEMU 2.12 and libwirtd 5.0.0, i think other other versions are also affected because not always there is the problem. ##### SUMMARY <!-- Explain the problem/feature briefly --> ##### STEPS TO REPRODUCE <!-- For bugs, show exactly how to reproduce the problem, using a minimal test-case. Use Screenshots if accurate. --> 1. Set a Host in Maintenance Mode 2. VM Migration is started 2. If a VM cant migrate it will hard stopped after @andrijapanicsb started a discussion on mailing list "VMs crashing/stopped during live migration?" i opened this issue request to track down the problems. @ustcweizhou gave some interesting hints to this problem. i picked up specially your point three. i think its most interesting to track this down. > 3. vm is stopped due to some cloudstack bugs. for example, when we put a host to maintenance, the vm will be stopped if (1) no other host is Up in same cluster, or (2) vm migration fails and no retry in cloudstack, or (3) multiple vms are migrated to same destination at the same time but there is no enough memory on the destination. ##### EXPECTED RESULTS <!-- What did you expect to happen when running the steps above? --> ~~~ The expected result should be to stop the maintenance mode but dont switch off the virtual machines ~~~ ##### ACTUAL RESULTS <!-- What actually happened? --> virtual machines will be hard stopped
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