On 18/04/2023 18:22, Ken Gaillot wrote:
On Tue, 2023-04-18 at 14:58 +0200, lejeczek via Users wrote:
Hi guys.
When it's done by the cluster itself, eg. a node goes 'standby' - how
do clusters migrate VirtualDomain resources?
1. Call resource agent migrate_to action on original node
2. Call resource agent migrate_from action on new node
3. Call resource agent stop action on original node
Do users have any control over it and if so then how?
The allow-migrate resource meta-attribute (true/false)
I'd imagine there must be some docs - I failed to find
It's sort of scattered throughout Pacemaker Explained -- the main one
is:
https://clusterlabs.org/pacemaker/doc/2.1/Pacemaker_Explained/html/advanced-options.html#migrating-resources
Especially in large deployments one obvious question would be - I'm
guessing as my setup is rather SOHO - can VMs migrate in sequence or
it is(always?) a kind of 'swarm' migration?
The migration-limit cluster property specifies how many live migrations
may be initiated at once (the default of -1 means unlimited).
But if this is cluster property - unless I got it wrong,
hopefully - then this govern any/all resources.
If so, can such a limit be rounded down to RA type or
perhaps group of resources?
many thanks, L.
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