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Anthony_Epron's avatar
Anthony_Epron
Icon for Nimbostratus rankNimbostratus
Jul 11, 2017

Monitoring question

Hello guys,

 

I have a pool with 4 pool member.

 

In this 4 pool member it's 2 nodes who listen on the port 8080 and 8081.

 

For resume, I have 2 server with 2 instance by server.

 

And want to monitor each instance and don't loose 2 server if one of his instance is down.

 

I hope my explanation was clear.

 

Thanks in advance.

 

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  • eben's avatar
    eben
    Icon for Nimbostratus rankNimbostratus
    Jul 11, 2017

    Hi Anthony if i get you correctly, you have 2 physical servers and two instances running per server. by default f5 monitors on all IP addresses and all ports in a pool. Hence If working monitor is used and one instance goes down, it won't affect the server provided other instances are fine.

     

    link text

     

    HTH Eben

     

  • Jad_Tabbara__J1's avatar
    Jad_Tabbara__J1
    Icon for Cirrostratus rankCirrostratus
    Jul 11, 2017

    Hi Anthony,

     

    When you add an HTTP monitor on a pool, if one pool member is down others are not impacted.

     

    So you can create a pool with four instances ( node1:8080 node1:8081 node2:8080 node2:8081 ) and if node1:8080 do not respond to your health check all other instance will still be available if still responding correctly to the monitor.

     

    Regards

     

  • Anthony_Epron's avatar
    Anthony_Epron
    Icon for Nimbostratus rankNimbostratus
    Jul 11, 2017

    Hello,

     

    Thanks for your answer.

     

    The problem is what is the monitor i can use for that.

     

    If i use a TCP_8080 and a TCP_8081 for the pool if node1:8080 is DOWN the node1:8081 is DOWN too because the F5 check the adresse IP with the two monitor.