[erlang-questions] Deploying on a server with different architecture and version of Erlang

[Vineet Naik]

On Fri, Dec 14, 2012 at 9:39 PM, Daniel Luna <daniel@REDACTED> wrote:

> If this fixed your problem you have missing dependencies in your
> .app.src file.  We always run {mod_cond, derived} here and it works
> like a charm.
>
> Until you miss to add a dependency in the .app.src file that is.
>

Hi Daniel,

I am am not able to exactly understand which dependencies are to be added
in app.src.

My code directly depends upon just two - emysql and exmpp (Not the
processone version
but this one [1] which is rebar compatible). Besides these, kernel and
stdlib are defined.

While creating a release on my development machine I could fix some initial
errors by
adding inets, sasl and crypto. That solved the problems with mod_cond still
being 'derived'

Today while creating a release on the server (where the app will be
deployed eventually),
it again failed with `{"init terminating in do_boot",{'cannot
load',X,get_file}}` kind of errors
and adding 'X' to app.src didn't work. Changing mod_cond to 'all' worked.

Now if I check the libraries in rel/<release-bundle>/lib directory, there
are a lot of them
but not all are added to app.src and it still works.

How to decide which ones go in app.src and which don't?

[1]: Rebar compatible fork of exmpp https://github.com/Zert/exmpp

Thanks,
Vineet


> Cheers,
>
> Daniel
>
> On 14 December 2012 09:54, Vineet Naik <naikvin@REDACTED> wrote:
> > IRC to the rescue! Changed mod_cond from derived to all
> > and it solved the problem.
> >
> > Thanks a lot
> > Vineet
> >
> >
> > On Fri, Dec 14, 2012 at 7:11 PM, Vineet Naik <naikvin@REDACTED> wrote:
> >>
> >> Now I got past this error, it was a mistake from my side. I didn't
> create
> >> the node on the server before running generate but copied files from my
> >> dev machine. After creating node and with some tweaking to the reltool
> >> config,
> >> release is generated on the prod server but fails on startup with,
> >>
> >> {"init terminating in do_boot",{'cannot load',error_handler,get_file}}
> >>
> >> From erlang docs[1]
> >>
> >> "Init terminating in do_boot ()" - The primitive Erlang boot sequence
> was
> >> terminated, most probably because the boot script has errors or cannot
> be
> >> read. This is usually a configuration error - the system may have been
> >> started with a faulty -boot parameter or with a boot script from the
> wrong
> >> version of OTP.
> >>
> >> How can I check whether boot script running from the wrong version of
> OTP
> >> is
> >> the problem?
> >>
> >> [1]: http://www.erlang.org/doc/apps/erts/crash_dump.html#id71973
> >>
> >> Regards,
> >> Vineet
> >>
> >> On Fri, Dec 14, 2012 at 4:05 PM, Vineet Naik <naikvin@REDACTED> wrote:
> >>>
> >>> Hello,
> >>>
> >>> Now that I have successfully built a release of my app using rebar, I
> am
> >>> stuck at
> >>> deploying the packaged release because the server I want to deploy to
> has
> >>> different
> >>> version of erlang and different architecture from my development
> machine.
> >>>
> >>> Development Env
> >>> -------------------------
> >>> i686 i686 i386 GNU/Linux
> >>> Erlang R14B04
> >>> erts-5.8.5
> >>>
> >>> Remote Server
> >>> ----------------------
> >>> x86_64 GNU/Linux
> >>> Erlang R13B03
> >>> erts-5.7.4
> >>>
> >>> I tried compiling on the server but it's failing with a series of
> errors
> >>> such as
> >>>
> >>> ERROR: Unable to generate spec: Mandatory application kernel is not
> >>> included in [{app,crypto,false,undefined,
> >>>
> >>> "/usr/lib/erlang/lib/crypto-1.6.3",
> >>>
> >>> ["/usr/lib/erlang/lib/crypto-1.6.3"],
> >>>
> "1.6.3","crypto-1.6.3",
> >>>                                                   .....
> >>>
> >>> I have two questions:
> >>>
> >>> 1. Is this due to the old version of erlang? And considering that I
> have
> >>> ejabberd and rabbitmq-server running in production on the same server
> >>> can I upgrade erlang to R14B04 on it without having to take them down
> for
> >>> much
> >>> time?
> >>>
> >>> 2. What is the recommended strategy for developing and deploying erlang
> >>> code on
> >>> differently configured servers?
> >>>
> >>> Thanks,
> >>> Vineet
> >>>
> >>>
> >>
> >>
> >>
> >> --
> >> Vineet Naik
> >>
> >>
> >
> >
> >
> > --
> > Vineet Naik
> >
> >
> >
> > _______________________________________________
> > erlang-questions mailing list
> > erlang-questions@REDACTED
> > http://erlang.org/mailman/listinfo/erlang-questions
> >
>



-- 
Vineet Naik
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