HAProxy 1.5-dev7 has been released recently with a lot of new features (compared to 1.5-dev6).
The present article will try to introduce all of them.
I won’t go through the bug fixes.
Performance Tuning Parameter
Set the maximum number connection per second an HAProxy process will accept.
– option http-no-delay
Reduce delay for very rare situation where the application relies on an interactive HTTP payload.
In such situation, delay can have an impact on performance.
– errorfile <code> <url>
– errorloc <code> <url>
– errorloc303 <code> <url>
Can now return an HTTP status code 200 to requests matching the monitor-uri.
– option redis-check
Redis health check
– stick store-response
Use a response pattern to create an entry in a stick table.
– first character
As you may know, the first character of the log flags is used to define the first event that caused the session to terminate.
There are now 2 new flag values:
– D: session killed by HAProxy because the server was DOWN and was configured to kill all connections when going DOWN.
– K: session killed by an administrator
Unix Socket Command
– clear table <table>
Remove entries from the stick-table <table>.
– disable frontend <frontend>
Mark a frontend as temporarily stopped.
– enable frontend <frontend>
Resume a frontend which has been stopped temporarily.
– set maxconn frontend <frontend> <value>
Dynamically change the maxconn frontend setting
– set maxconn global <maxconn>
Dynamically change the global maxconn setting.
– set rate-limit connections global <value>
Change the process-wide connection rate limit, which is set by the global maxconnrate setting
– show table <name>
Dump contents of stick-table .
– shutdown frontend <frontend>
Completely delete a frontend
– shutdown session <id>
Immediately terminate a session