check_http -S through ServerIron fails

[Skip Montanaro]

I've encountered in "interesting" problem with the check_http plugin.  We
have some machines fronted by a Foundry Networks ServerIron switch for load
balancing.  The folks who run the server recently changed to backend server
selection using SSL Session ID.  This hoses check_http (v. 1.36) which now
gets a connect timeout:

    $ /usr/local/nagios/libexec/check_http -S -H 129.105.213.249
    CRITICAL - Socket timeout after 10 seconds

Using check_http v. 1.24 from a different machine seems to work.  It gets a
302 response:

    % ~nagios/libexec/check_http -S -H 129.105.213.249
    HTTP ok: HTTP/1.1 302 Moved Temporarily -   0.384 second response time |time=  0.384

Dispensing with the -S flag also works because the ServerIron is still
selecting a backend server for http based on the IP address:

    $ /usr/local/nagios/libexec/check_http -H 129.105.213.249
    HTTP OK HTTP/1.1 200 OK - 0.006 second response time |time=0.006

How (if at all) can I generate the necessary session id in check_http and
get it to the ServerIron?

Thx,

-- 
Skip Montanaro
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skip at pobox.com


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