Thursday, 2020-11-26

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amalrajgenocidexWe have an openstack environment with 3 controllers(running in High Availability) and 5 compute nodes. The environment is created using Canonical Juju. Currently, we are having issues with our network switches,so planning to update and restart the switches. Is is okay to keep the controllers and computes nodes ON during this process. Or should we12:29
amalrajgenocidexcompletely shutdown all the compute and controller nodes before restarting the swtich?12:29
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DHEthe controller itself doesn't care that much. I'd worry about other things like if you're running HA that it might cause you to go split brain on the nodes14:29
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dpacltDHE sorry didnt understand.. Does this mean we can shutdown all the vms and leave controllers as such15:07
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DHEopenstack components by themselves are mostly fine with being disconnected from the controller for a while. KVM just keeps working normally for example. but the original asker said he had HA controllers so my concern is that the HA parts might go funky if they lose network connectivity to each other (unless you have an out-of-band connection for that?)15:10
admin0i would shutdown the database only, or keep only 1 running and shut 2 down .. before that .. so that db is safe and no split brain occours15:11
admin0rest of the connections will recover itself15:11
admin0a swich restart should not take that long for those to go into timeout mode15:11
admin0mostly switch reboots within the minute, so all should be fine .. alternate is start a temporary switch,  plug the cables to the new one for say controllers ( so that they are not affected) and do the main switch restart15:13
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dpacltDHE and admin0 Thanks much for your response.It wont be just a switch restart..We may need to do switch version upgrade and switch will be down for 30-1 hour for this activity. Yes all Openstack services are in HA controllers. Each service running on lxd on the controller16:42
dpacltso do we need shutdown all VMs,Hypervisors and controllers.. Still confused and couldnt find a document16:46
DHEI repeat myself. openstack itself doesn't care. but your HA layer may cause you grief with split brain scenarios. shutting down the controllers might be prudent.16:54
dpacltThanks DHE16:55
DHEdo you use iscsi or other network-based disks for your VMs? that would also be a concern16:57
dpacltyes iscsi for vms .. so planning to shutdown the vms and hypervisors16:58
dpacltBackend is EMC San storage16:58
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DiplomatHey guys. I'm a bit confused about the placement api tool. I'm trying to install it but it doesn't seem to generate an apache config. Do I have to create that config myself ?17:58
admin0dpaclt, shut down 2 galera processes .. should be good17:58
admin0rest can stay online while your switches are rebooting17:58
DiplomatI tested with uwsgi as docs offer and everything works fine, but it wants me to restart the Apache but there are no apache configs/vhosts17:59
admin0shut down all :D17:59
admin0coz your storage is also going to be affected17:59
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DiplomatHey! I'm getting this funky error in linuxbridge agent log: oslo_privsep.daemon.FailedToDropPrivileges: privsep helper command exited non-zero (1). It seems to be related to https://bugzilla.redhat.com/show_bug.cgi?id=1850973 if I disable selinux everything seems to be fine, but disabling selinux is not the best idea. Any idea how to resolve it?20:57
openstackbugzilla.redhat.com bug 1850973 in openstack-selinux "privsep-helper fails to spawn" [Unspecified,Closed: upstream] - Assigned to jpichon20:57
DiplomatI'm using Victoria on CentOS 820:58
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