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DOC: checks: environment variables used by "external-check command"

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Add some documentation about the environment variables available with
"external-check command". Currently, only one of them is dynamically updated
on each check : HAPROXY_SERVER_CURCONN.
This commit is contained in:
Cyril Bont 2014-12-27 22:28:39 +01:00 committed by Willy Tarreau
parent ac92a065d7
commit 72cda2ad91
1 changed files with 30 additions and 3 deletions
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33
doc/configuration.txt
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@ -5354,9 +5354,6 @@ external-check command <command>
Arguments :
<command> is the external command to run
The PATH environment variable used when executing the
command may be set using "external-check path".
The arguments passed to the to the command are:
<proxy_address> <proxy_port> <server_address> <server_port>
@ -5368,6 +5365,36 @@ external-check command <command>
possible to determine a listener, and both <proxy_address> and <proxy_port>
will have the string value "NOT_USED".
Some values are also provided through environment variables.
Environment variables :
HAPROXY_PROXY_ADDR The first bind address if available (or empty if not
applicable, for example in a "backend" section).
HAPROXY_PROXY_ID The backend id.
HAPROXY_PROXY_NAME The backend name.
HAPROXY_PROXY_PORT The first bind port if available (or empty if not
applicable, for example in a "backend" section or
for a UNIX socket).
HAPROXY_SERVER_ADDR The server address.
HAPROXY_SERVER_CURCONN The current number of connections on the server.
HAPROXY_SERVER_ID The server id.
HAPROXY_SERVER_MAXCONN The server max connections.
HAPROXY_SERVER_NAME The server name.
HAPROXY_SERVER_PORT The server port if available (or empty for a UNIX
socket).
PATH The PATH environment variable used when executing
the command may be set using "external-check path".
If the command executed and exits with a zero status then the check is
considered to have passed, otherwise the check is considered to have
failed.