Hello,
Is there a way to affect a groups ordering behavior? The default appears to be
left to right which I can understand. However if I wish to create a group of
"like primitives" and not primitives who are dependant on each other - for
example a list of (ocf::heartbeat:Filesystem) primitives - then I care less
about the order. I was hoping to specify a meta characteristic like "lazy" I
guess; something like meta order="lazy" or "not-applicable". This ordering
behavior seems to exist in colocation as well.
What I wish to achieve is to take a file system resource down - say for
maintenance and then allow it to come back when maintenance is completed
without affecting the other Filesystem primitives down the list.
To provide a visual illustration of this I created a cloned group of dummies
using (ocf::pacemaker:Dummy) and I have stopped just the last dummy primitive:
Clone Set: cl_dummies [grp_dummies]
Resource Group: grp_dummies:0
dummy1:0 (ocf::pacemaker:Dummy): Started node1
dummy2:0 (ocf::pacemaker:Dummy): Started node1
dummy3:0 (ocf::pacemaker:Dummy): Started node1
dummy4:0 (ocf::pacemaker:Dummy): Started node1
dummy5:0 (ocf::pacemaker:Dummy): Stopped
Resource Group: grp_dummies:1
dummy1:1 (ocf::pacemaker:Dummy): Started node2
dummy2:1 (ocf::pacemaker:Dummy): Started node2
dummy3:1 (ocf::pacemaker:Dummy): Started node2
dummy4:1 (ocf::pacemaker:Dummy): Started node2
dummy5:1 (ocf::pacemaker:Dummy): Stopped
When all are running crm_mon presents as:
Clone Set: cl_dummies [grp_dummies]
Started: [ node1 node2]
What I want to achieve is to take a middle dummy primitive out but leave the
rest running. When I do that - for example on dummy3; dummies 4 and 5 also get
taken out such that I am left with this:
Clone Set: cl_dummies [grp_dummies]
Resource Group: grp_dummies:0
dummy1:0 (ocf::pacemaker:Dummy): Started node1
dummy2:0 (ocf::pacemaker:Dummy): Started node1
dummy3:0 (ocf::pacemaker:Dummy): Stopped
dummy4:0 (ocf::pacemaker:Dummy): Stopped
dummy5:0 (ocf::pacemaker:Dummy): Stopped
Resource Group: grp_dummies:1
dummy1:1 (ocf::pacemaker:Dummy): Started node2
dummy2:1 (ocf::pacemaker:Dummy): Started node2
dummy3:1 (ocf::pacemaker:Dummy): Stopped
dummy4:1 (ocf::pacemaker:Dummy): Stopped
dummy5:1 (ocf::pacemaker:Dummy): Stopped
What I would like is this:
Clone Set: cl_dummies [grp_dummies]
Resource Group: grp_dummies:0
dummy1:0 (ocf::pacemaker:Dummy): Started node1
dummy2:0 (ocf::pacemaker:Dummy): Started node1
dummy3:0 (ocf::pacemaker:Dummy): Stopped
dummy4:0 (ocf::pacemaker:Dummy): Started node1
dummy5:0 (ocf::pacemaker:Dummy): Started node1
Resource Group: grp_dummies:1
dummy1:1 (ocf::pacemaker:Dummy): Started node2
dummy2:1 (ocf::pacemaker:Dummy): Started node2
dummy3:1 (ocf::pacemaker:Dummy): Stopped
dummy4:1 (ocf::pacemaker:Dummy): Started node2
dummy5:1 (ocf::pacemaker:Dummy): Started node2
A work around I have considered is to edit the group and resort the list so
that the Filesystem primitive I'm interested in working on is named last but I
wonder if I'll remember ;-) to do that the next time I need to perform
maintenance.
Or is there a better way to do this that I have not been introduced too yet?
Regards,
Nick
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