I have a kubernetes cluster.
I can easily connect to a remote container, and run a shell node connecting to live production erlang node:
$ kubectl exec myapp-2431125679-cwqvt -i -t -- iex --name debugging@127.0.0.1 --remsh myliveapp@127.0.0.1 --cookie my_secret_cookie
Erlang/OTP 18 [erts-7.3.1] [source] [64-bit] [smp:2:2] [async-threads:10] [kernel-poll:false]
Interactive Elixir (1.3.4) - press Ctrl+C to exit (type h() ENTER for help)
iex(myliveapp@127.0.0.1)1>
What I need though is to be able to run an :observer
against a remote live production erlang node.
I can do that too:
- kill local
epmd
process:
killall epmd
- forward selected remote ports to my local machine:
kubectl port-forward myapp-2431125679-cwqvt 35609 4369
I know that my app runs on port 35609 on a remote container, and 4369 is the port epmd
runs by default, which is the case for my remote container.
- run:
iex --name debugging@127.0.0.1 --cookie marketplace -e ':observer.start()'
- select the app I'm interested in from the top menu in
:observer
.
My questions are: - can this be done simpler?
- is there anything I should know about kubernetes, to make it possible to write a one-liner that'd connect to a remote node and do what I want?
Ultimately, can I make this process a one-liner or turn it into a shell script?
Right now killingepmd
looks really-really dirty, I'd love to be able avoid that specifically.
1条答案
按热度按时间s4n0splo1#
是的,你可以把它变成一个shell脚本。我确实为这个用例创建了一个shell脚本,但是我使用的是SSH。我的方法看起来和你的一样,而且我必须在本地杀死epmd。但是我能够把它 Package 成一个bash脚本。你可以在这里获得它:https://github.com/dominicletz/remote_observe/
该脚本还自动发现远程波束端口。
remote_observe -c <cookie> <server-address>
我手边没有Kubernetes部署可以尝试,但它可能很容易移植到调用
kubectl port-forward <server-address> <port>
,而不是当前的ssh转发。