Patch for Erlang in Jails
t...@diogunix.com
/usr/ports/lang/erlang-lite
Hello Olgeni, Ashish, Port maintainers,
through a couple of tests I found out that Erlang 14B as currently in the
Ports Collection and therefor also built when building the most popular
Erlang program (ejabberd) can't run in a FreeBSD Jail as it collides with
the localhost specialities of Jails.
Reason:
In Erlang 14B a new check was introduced for the communication of the empd
daemon with the host. As this check currently is not configurable, no
current Erlang will run in a Jail - as a follow-up too effecting all Erlang
programs of course.
Thanks to Michael from the Erlang mailing list (see CC), it seems a solution
came up to run Erlang 14B in a Jail.
A few minutes ago, Michael provided a quick patch for Erlang 14B to disable
the check metnioned above.
Here's his quick patch:
> diff --git a/erts/epmd/src/epmd_srv.c b/erts/epmd/src/epmd_srv.c
> index ef471a4..e2cc2dc 100644
> --- a/erts/epmd/src/epmd_srv.c
> +++ b/erts/epmd/src/epmd_srv.c
> @@ -766,6 +766,9 @@ static int conn_open(EpmdVars *g,int fd)
> dbg_tty_printf(g,2,(s->local_peer) ? "Local peer connected" :
> "Non-local peer connected");
>
> + /* XXX allow local messages from all clients */
> + s->local_peer = EPMD_TRUE;
> +
> s->want = 0; /* Currently unknown */
> s->got = 0;
> s->mod_time = current_time(g); /* Note activity */
Michael also announced to make a better patch in a few days. Also the Erlang
folks might offer a future option to disable the check or provide another
possibility to properly run Erlang and Erlang programs (such as ejabberd) in
a Jail.
I'm not sure on how to deal with this.
I just thought you should know about what's going on.
Hope this helps.
kind regards
Tom
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