On 9/27/23 16:02, Ken Gaillot wrote:
On Wed, 2023-09-27 at 15:42 +0300, Andrei Borzenkov wrote:
On Wed, Sep 27, 2023 at 3:21 PM Adam Cecile<acec...@le-vert.net>
wrote:
Hello,
I'm struggling to understand if it's possible to create some kind
of constraint to avoid two different resources to be running on the
same host.
Basically, I'd like to have floating IP "1" and floating IP "2"
always being assigned to DIFFERENT nodes.
Is that something possible ?
Sure, negative colocation constraint.
Can you give me a hint ?
Using crmsh:
colcoation IP1-no-with-IP2 -inf: IP1 IP2
Thanks in advance, Adam.
To elaborate, use -INFINITY if you want the IPs to *never* run on the
same node, even if there are no other nodes available (meaning one of
them has to stop). If you *prefer* that they run on different nodes,
but want to allow them to run on the same node in a degraded cluster,
use a finite negative score.
That's exactly what I tried to do:
crm configure primitive Freeradius systemd:freeradius.service op start
interval=0 timeout=120 op stop interval=0 timeout=120 op monitor
interval=60 timeout=100
crm configure clone Clone-Freeradius Freeradius
crm configure primitive Shared-IPv4-Cisco-ISE-1 IPaddr2 params
ip=10.1.1.1 nic=eth0 cidr_netmask=24 meta migration-threshold=2 op
monitor interval=60 timeout=30 resource-stickiness=50
crm configure primitive Shared-IPv4-Cisco-ISE-2 IPaddr2 params
ip=10.1.1.2 nic=eth0 cidr_netmask=24 meta migration-threshold=2 op
monitor interval=60 timeout=30 resource-stickiness=50
crm configure location Shared-IPv4-Cisco-ISE-1-Prefer-BRT
Shared-IPv4-Cisco-ISE-1 50: infra-brt
crm configure location Shared-IPv4-Cisco-ISE-2-Prefer-BTZ
Shared-IPv4-Cisco-ISE-2 50: infra-btz
crm configure colocation Shared-IPv4-Cisco-ISE-Different-Nodes -100:
Shared-IPv4-Cisco-ISE-1 Shared-IPv4-Cisco-ISE-2
My hope is that IP1 stays in infra-brt and IP2 goes on infra-btz. I want
to allow them to keep running on different host so I also added
stickiness. However, I really do not want them to both run on same node
so I added a colocation with negative higher score.
Does it looks good to you ?
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