Forum Discussion
Michaelyang
Cirrostratus
Cirrostratuspool monitor issue
Hello, I encountered a problem here... I set up the oracle external monitor will suddenly fail, manually build a similar test but normal again. Here is monitor setting Today, I changed back...
CA_Valli
MVP
MVPYour external monitor will check for output being returned to stdout in order to mark a pool member available.
If no data was returned, it will mark pool member down.
To manually run external monitor and check for output, you can move to /config/filestore/files_d/Common_d/external_monitor_d/ where all of your external monitor scripts are stored, check for script name (I noticed BIG-IP appends some sort of versioning to the files) and then run it as as script, passing it the required parameters (I believe defaults are server ip, L4 port and timeout)
[root@f5:Active:Standalone] common # cd /config/filestore/files_d/Common_d/external_monitor_d/
[root@f5:Active:Standalone] external_monitor_d # ./\:Common\:myexternalmonitor_320535_2 <server ip ex 10.10.10.10> <server port ex. 1813> <timeout ex. 16>
This will immediately let you know if output is seen or not, or if there are other errors -- for example I noteiced PERL interpreter changing directory when moving to BIG-IPv15
- Michaelyang
Hi CA_Valli,
Thanks for your aply.
But I find it odd that a node with the original state of down actually UP after switching to another monitor with the same settings...
And it also happened three times...
- CA_Valli
As long as your script retrieves anything an answer (so that there is some data in stdout output), external monitor will mark node up... let's say it returns a "KO" message or "connession issue" messege -- those are both non-null strings so monitor will be green.
