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Terry_Pike's avatar
Terry_Pike
Icon for Nimbostratus rankNimbostratus
Feb 28, 2012

HTTP healthcheck with simply a send string of GET

Been trawling ask F5 but cannot find the answer to a basic question, any advice is appreciated:

 

 

When using an HTTP healthcheck with simply a send string of GET / and with no receive string, what would the BigIP-LTM take to be a ‘good’ response from the app server?

 

 

I am guessing that it will look for some HTTP response, and would like to think that it has to be a ‘good’ code, e.g. 200, 302 to mark the node UP

 

 

I am hoping that if it gets a 4xx or 5xx HTTP return code that it marks the node DOWN

 

 

Just need this confirmed - does anyone know ?

 

 

management
monitoring

2 Replies

  • hoolio's avatar
    hoolio
    Icon for Cirrostratus rankCirrostratus
    Feb 28, 2012
    Hi Terry,

     

     

    with no receive string, what would the BigIP-LTM take to be a ‘good’ response from the app server

     

     

    Any TCP data will be considered a success. This is why it's a bad idea to not use a receive string. It would be more ideal to look for a 2xx or 3xx response. To do that you could use a receive string of:

     

     

    HTTP/1\.(0|1) (2|3)

     

     

    Aaron