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DOC: tcpcheck comment documentation 

Introduction of new tcpcheck comment directive and also update texpcheck
ruleset examples.
This commit is contained in:
Baptiste Assmann 2015-04-25 16:27:23 +02:00 committed by Willy Tarreau
parent 22b09d2393
commit d60a9e5a39
1 changed files with 17 additions and 4 deletions
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21
doc/configuration.txt
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@ -5611,34 +5611,47 @@ option tcp-check
In this mode, many questions may be sent and many answers may be
analysed.
A fifth mode can be used to insert comments in different steps of the
script.
For each tcp-check rule you create, you can add a "comment" directive,
followed by a string. This string will be reported in the log and stderr
in debug mode. It is useful to make user-friendly error reporting.
The "comment" is of course optional.
Examples :
# perform a POP check (analyse only server's banner)
option tcp-check
tcp-check expect string +OK\ POP3\ ready
tcp-check expect string +OK\ POP3\ ready comment POP\ protocol
# perform an IMAP check (analyse only server's banner)
option tcp-check
tcp-check expect string *\ OK\ IMAP4\ ready
tcp-check expect string *\ OK\ IMAP4\ ready comment IMAP\ protocol
# look for the redis master server after ensuring it speaks well
# redis protocol, then it exits properly.
# (send a command then analyse the response 3 times)
option tcp-check
tcp-check comment PING\ phase
tcp-check send PING\r\n
tcp-check expect +PONG
tcp-check expect +PONGe
tcp-check comment role\ check
tcp-check send info\ replication\r\n
tcp-check expect string role:master
tcp-check comment QUIT\ phase
tcp-check send QUIT\r\n
tcp-check expect string +OK
forge a HTTP request, then analyse the response
(send many headers before analyzing)
option tcp-check
tcp-check comment forge\ and\ send\ HTTP\ request
tcp-check send HEAD\ /\ HTTP/1.1\r\n
tcp-check send Host:\ www.mydomain.com\r\n
tcp-check send User-Agent:\ HAProxy\ tcpcheck\r\n
tcp-check send \r\n
tcp-check expect rstring HTTP/1\..\ (2..|3..)
tcp-check expect rstring HTTP/1\..\ (2..|3..) comment check\ HTTP\ response
See also : "tcp-check expect", "tcp-check send"