Hello,
I have the following scenario:

        - I have two machines (mail-01 and mail-02)

        - Both should run postfix local (supervised by linux-ha)

        - I have a floating ip address that is on mail-01 or on mail-02

And I have the following question: Is it possible to say an Ipaddr2
resource using a colocation or other contraint that it has to run on a
server that proviedes "postfix" but is not allowed to run more than
once?

# # # # # # #         # # # # # # #
# mail-01   #         # mail-02   #
# 10.0.0.1  #         # 10.0.0.2  #
# postfix   #         # postfix   #
# # # # # # #         # # # # # # #

<- 10.0.0.3 (depends on postfix) -> 

So the ip can run on any node that provides postfix but not twice?

I could get the above scenario easily to say ipaddr2 can run on these
two nodes. But I also want to verify that a postfix is running for sure
on that node.

        Thomas
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