Pool downtime query

Forums Technical Forums
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1

I have four pool members which are marked down and I am interested to know when exactly this happened.

I know in the Common partition I can just issue a show ltm pool members command.

But these pools exist in a different partition (for this query I will call it partitionA)

So I do cd /PartitionA

and issue the same command show ltm pool members

But no info is displayed, it just returns to command line.

What is the correct way to see the pool downtime of all pools in PartitionA ?
Thanks.

2

The commands you used work in my home lab. Are the pools located in a subfolder of PartitionA (e.g. /PartitionA/subfolder)? That could be the reason why you are not getting any information back.

Try each of the following commands from the /Common partition to see if you get any results:

show ltm pool /PartitionA/* members
show ltm pool /PartitionA/subfolder/* members
show ltm pool /*/*/* members

3

Thank you! I can now see the affected pool members which are down.

But is there a command which will show when exactly they went down? Maybe such a command does not exist?

4

You can check the LTM logs using the following commands (this will show you when a pool member was marked up or down).

run util bash

cat /var/log/ltm | grep Pool | grep status
cat /var/log/ltm.1 | grep Pool | grep status
zcat /var/log/ltm*gz | grep Pool | grep status

If you have a health check monitor applied to the pool, then you can also check its status.

For example:

show ltm monitor tcp tcp

This will provide output similar to the following:

--------------------------
 LTM::Monitor /Common/tcp
--------------------------
   Destination:  172.24.32.11:80
   State time:   up for 40hrs:47mins:43sec
   |   Last error:   No successful responses received before deadline. @2024.01.09 22:35:07

   Destination:  172.24.32.11:443
   State time:   up for 149hrs:50mins:46sec
   |   Last error:   N/A @2024.01.05 09:32:04

5

I think I found a way to get what I’m looking for.
So I did bash

zegrep -i “monitor.*status” /var/log/ltm*

This gave me a lot of info that I was able to export. I then filtered for the specific pools I am interested in and can see the date and time when the pool went down.

/domain_tenant/domain_443/domain_443_https_ABC_pool member /Common/IP_ADDRESS_443 monitor status unchecked. [  ]  [ was up for 647hrs:43mins:41sec ]

/var/log/ltm.7.gz:Jan  4 10:54:11 F5 notice mcpd[11155]: 01070638:5: Pool

6

Brilliant. Thanks a lot for your help. I got exactly what I needed.