Re: [mosquitto-dev] Implementing health check for containerized MQTT ser

[Roger Light <roger@xxxxxxxxxx>]

Just an fyi, the libwebsockets library used to provide websockets
support is problematic for various reasons. The project maintainers
have a different view to me on backward compatibility and how semver
works, both of which mean that any given version of the library may or
may not work. In particular, the interface that mosquitto uses is
slated to be removed.

Mosquitto 2.1 will offer libwebsockets support as a legacy mode, and
its own built in websockets support - chosen at compile time. The
built in websockets mode also provides websockets support to
libmosquitto and the mosquitto clients. It does not, however, provide
support for http_dir at the moment. I'm not entirely convinced that
providing this support should be part of mosquitto in the future
either.

Cheers,

Roger

On Sat, 23 Jul 2022 at 22:22, Ben Hardill <hardillb@xxxxxxxxx> wrote:
>
> setup a listener bound to 127.0.0.1 with protocol set to websockets and
> set the http_dir option to point to a directory with a file in it.
>
> > http_dir directory
> >
> >     When a listener is using the websockets protocol, it is possible to serve http data as well. Set http_dir to a directory which contains the files you wish to serve. If this option is not specified, then no normal http connections will be possible.
>
>
>
> On 23/07/2022 20:41, Steve Prior wrote:
> > I've written a number of server applications that perform work based on
> > MQTT subscriptions and deployed those applications in Docker
> > containers.  What I haven't done yet is set up container health checking
> > for those applications.  I was wondering what patterns for health
> > checking people have found effective? These applications don't have any
> > interface besides the MQTT subscriptions and published response - no
> > REST API.
> >
> > Thanks
> > Steve
> >
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