[ClusterLabs] syntax question regarding pcs order sets
tojeline at redhat.com
Wed Jun 10 08:27:00 EDT 2015
Dne 10.6.2015 v 00:38 Dennis Jacobfeuerborn napsal(a):
> I'm not sure if I understand the syntax correctly for pcs order sets:
> pcs constraint order set resource1 resource2 [resourceN]... [options]
> [set resourceX resourceY ... [options]] [setoptions [constraint_options]]
> What I'm confused by is the two lists of resources. Is this simply a way
> to define several sets in one go or would there also exist an order
> constraint between the two defined sets themselves?
It allows you to specify more sets in one constraint. For better
understanding how this works you can check out Pacemaker Explained:
For example this command:
pcs constraint order set A B sequential=false set C D sequential=true
set E F sequential=false
creates a constraint which is described in Example 6.11. and Figure 6.3.
in Pacemaker Explained.
> I'm wondering because I'm not sure if it is possible to define a set
> where the first resource would the the master state of a drbd clone
> resource followed by several Filesystem Resources e.g.:
> drbd_clone:Master -> fs1 -> fs2 -> fs3
> Is it possible to use an order set to express this?
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