I have a Phoenix application running in a Docker container, based on the bitwalker/alpine-elixir-phoenix image.
I would like to be able to inspect it with
:observer.start as described in chapter 12 of Programming Phoenix.
I assume several steps are needed :
- inspecting the remote host from my local machine, simply via ssh (there is a related discussion here)
iex> :observer.start()inside the container (I have added
RUN apk add --update postgresql-client erlang-observer && rm -rf /var/cache/apk/*in my Dockerfile
When doing this, I get the following error :
** (UndefinedFunctionError) function :wx_object.start/3 is undefined (module :wx_object is not available) :wx_object.start(:observer_wx, , ) observer_wx.erl:72: :observer_wx.start/0
My understanding is that
wx_object is part of the UI of :observer.
Assuming this would be fixed by installing another package, is it really the way to go? Is there a resource I could open to outside (a port ?) that would let me grab the output of :observer and render it on my local machine?
Or maybe another idea to explore would be to use
ttb and funnel the raw data (how ?) to
:observer on my local machine?