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anishp_165748's avatar
anishp_165748
Icon for Nimbostratus rankNimbostratus
Apr 21, 2015

Combine Health check monitor

We wanted to check both 200 OK and the content word "test" on the site and below is our current config. The problem is we're getting two separate logs to the two health-checks and we were wondering if there is a way for us to combine these two health checks.

 

} ltm pool /Common/POOL-prod1-web-wcp-80 { members { /Common/10.1.1.1:80 { address 10.96.4.11 } /Common/10.1.1.2:80 { address 10.96.4.5 } /Common/10.1.1.3:80 { address 10.96.4.7 } /Common/10.1.1.4:80 { address 10.96.4.8 } } monitor /Common/MON-HTTP-CUSTOM and /Common/MON-HTTP-CUSTOM-200OK }

 

} ltm monitor http /Common/MON-HTTP-CUSTOM { defaults-from /Common/http destination : interval 5 ip-dscp 0 recv test send "GET /blog/\?HealthCheck01 HTTP/1.1\r\nHost: zzz.com\r\nConnection: close\r\n\r\n" time-until-up 0 timeout 16 } ltm monitor http /Common/MON-HTTP-CUSTOM-200OK { defaults-from /Common/http destination : interval 5 ip-dscp 0 recv "200 OK" send "GET /blog/\?HealthCheck01 HTTP/1.1\r\nHost: zzz.com\r\nConnection: Close\r\n\r\n" time-until-up 0 timeout 16 }

 

Thanks in advanced!

 

6 Replies

  • DEJ_159363's avatar
    DEJ_159363
    Icon for Cirrus rankCirrus
    Apr 21, 2015

    Hello,

     

    Wouldn't the fact that you can match the content word "test" from the site validate the fact that there is a 200 OK as well? Still learning about F5, so forgive me if there's something I'm missing.

     

  • DEJ's avatar
    DEJ
    Icon for Nimbostratus rankNimbostratus
    Apr 21, 2015

    Hello,

     

    Wouldn't the fact that you can match the content word "test" from the site validate the fact that there is a 200 OK as well? Still learning about F5, so forgive me if there's something I'm missing.

     

    • DEJ's avatar
      DEJ
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      Apr 21, 2015
      Another possibility is regex. recv "(200\sOK(.|\s)*test)"
  • anishp_165748's avatar
    anishp_165748
    Icon for Nimbostratus rankNimbostratus
    Apr 23, 2015

    Hi Dareuja,

     

    Thanks for the response and I am learning this myself as well so not an expert at all. For your second point about the regex, can you post how the exact health-check would look like with that? Is this something you've already deployed before?

     

    Thanks, John

     

    • DEJ's avatar
      DEJ
      Icon for Nimbostratus rankNimbostratus
      Apr 23, 2015
      Hello John, I've not deployed a health monitor utilizing a regex recv string. I used a combination of resources referenced below to create and check the regex I suggested. To implement I believe you would just replace the value in recv. It should be easy to check working status by creating a test pool and applying the health monitor. recv "200\sOK(.|\s)*test" https://support.f5.com/kb/en-us/solutions/public/5000/900/sol5917.html https://regex101.com/