William,

Am 20.11.2017 um 13:45 schrieb William Lallemand:
> On Mon, Nov 20, 2017 at 12:55:06PM +0100, Tim Düsterhus wrote:
>> May I suggest the following: If haproxy is *not* compiled with the
>> `USE_SYSTEMD` option it checks for the existence of the `NOTIFY_SOCKET`
>> environment variable and refuses start up, if it is defined.
>>
>> Then `Type=notify` will "just work" if haproxy is compiled with the
>> option and will emit a proper error message if it is not.
>>
> 
> If you're suggesting of doing this with -W, it's not a good idea, sometimes 
> you
> just want to start HAProxy for tests or development independently of any init
> system.
> 

but upon a manual start `NOTIFY_SOCKET` would not be set, no? I made the
suggested change in my working copy to test it:

> $ sudo env NOTIFY_SOCKET=foo ./haproxy -W -f ./haproxy.cfg
> [ALERT] 000/010000 (22263) : NOTIFY_SOCKET is defined, but haproxy is not 
> compiled with USE_SYSTEMD=1. Change Type=notify in your unit file.
> $ sudo env ./haproxy -W -f ./haproxy.cfg
> ^C[WARNING] 323/140435 (22278) : Exiting Master process...
> [ALERT] 323/140435 (22278) : Current worker 22279 left with exit code 130
> [WARNING] 323/140435 (22278) : All workers are left. Leaving... (130)

Rebuilding with USE_SYSTEMD and starting with the obviously incorrect
NOTIFY_SOCKET=foo does not prevent the start:

> $ sudo env NOTIFY_SOCKET=foo ./haproxy -W -f ./haproxy.cfg
> ^C[WARNING] 323/140545 (22703) : Exiting Master process...
> [ALERT] 323/140545 (22703) : Current worker 22704 left with exit code 130
> [WARNING] 323/140545 (22703) : All workers are left. Leaving... (130)
> $ sudo env ./haproxy -W -f ./haproxy.cfg
> ^C[WARNING] 323/140556 (22722) : Exiting Master process...
> [ALERT] 323/140556 (22722) : Current worker 22723 left with exit code 130
> [WARNING] 323/140556 (22722) : All workers are left. Leaving... (130)

Best regards
Tim Düsterhus

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