MEDIUM: proxy: remove obsolete "mode health"
As discussed here during 2.1-dev, "mode health" is totally obsolete:
https://www.mail-archive.com/haproxy@formilux.org/msg35204.html
It's fundamentally incompatible with usage of SSL, doesn't support
source filtering, and imposes the presence of file descriptors with
hard-coded syscalls directly in the generic accept path.
It's very unlikely that anyone has used it in the last 10 years for
anything beyond testing. In the worst case if anyone would depend
on it, replacing it with "http-request return status 200" and "mode
http" would certainly do the trick.
The keyword is still detected as special by the config parser to help
users update their configurations appropriately.
diff --git a/doc/configuration.txt b/doc/configuration.txt
index a1a743f..b55a807 100644
--- a/doc/configuration.txt
+++ b/doc/configuration.txt
@@ -7099,7 +7099,7 @@
See also : "server", global section's "maxconn", "fullconn"
-mode { tcp|http|health }
+mode { tcp|http }
Set the running mode or protocol of the instance
May be used in sections : defaults | frontend | listen | backend
yes | yes | yes | yes
@@ -7115,15 +7115,6 @@
processing and switching will be possible. This is the mode which
brings HAProxy most of its value.
- health The instance will work in "health" mode. It will just reply "OK"
- to incoming connections and close the connection. Alternatively,
- If the "httpchk" option is set, "HTTP/1.0 200 OK" will be sent
- instead. Nothing will be logged in either case. This mode is used
- to reply to external components health checks. This mode is
- deprecated and should not be used anymore as it is possible to do
- the same and even better by combining TCP or HTTP modes with the
- "monitor" keyword.
-
When doing content switching, it is mandatory that the frontend and the
backend are in the same mode (generally HTTP), otherwise the configuration
will be refused.
@@ -7132,8 +7123,6 @@
defaults http_instances
mode http
- See also : "monitor", "monitor-net"
-
monitor fail { if | unless } <condition>
Add a condition to report a failure to a monitor HTTP request.