GitLab 无法到达 docker 容器中的 PlantUml

Question

So I have GitLab EE server (Omnibus) installed and set up on Ubuntu 20.04. Next, following official documentation found on GitLab PlantUML integration , I started PlantUML in a docker container which I did with the following command:

docker run -d --name plantuml -p 8084:8080 plantuml/plantuml-server:tomcat

Next, I also configured /etc/gitlab/gitlab.rb file and added next line for redirection as my GitLab server is using SSL:

nginx['custom_gitlab_server_config'] = "location /-/plantuml/ { \n    proxy_cache off; \n    proxy_pass  http://plantuml:8080/; \n}\n"

In the GitLab server GUI in admin panel, in Settings -> General, when I expand PlantUML, I set the value of PlantUML URL to (two ways):

1st approach :

https://HOST_SERVER_IP:8084/-/plantuml

Then, when trying to reach it through the browser through this address(https://HOST_SERVER_IP:8084/-/plantuml), I get

This site can't provide a secure connection.

HOST_SERVER_IP sent an invalid response.

ERR_SSL_PROTOCOL_ERROR

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2nd approach : Also I tried to put before that I tried different value in in Settings -> General -> PlantUML -> PlantUML URL :

https://HOST_SERVER_IP/-/plantuml

Then, when trying to reach it through the browser through this address (https://HOST_SERVER_IP/-/plantuml), I get

502

Whoops, GitLab is taking too much time to respond

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In both cases when I trace logs with gitlab-ctl tail I get the same errors:

[crit] *901 SSL_do_handshake() failed (SSL: error:141CF06C:SSL routines:tls_parse_ctos_key_share:bad key share) while SSL handshaking, client: CLIENT_IP, server: 0.0.0.0:443
[error] 1123593#0: *4 connect() failed (113: No route to host) while connecting to upstream

My question is which of the above two ways is correct to access PlantUML with the above configuration and is there any configuration I am missing?

Answer 1

I believe the issue is that you are running the plantuml in a docker container and then trying to reach it via gitlab (on localhost) with name.

In order to check if that is the issue please change

proxy_pass  http://plantuml:8080/

to

proxy_pass http://localhost:8080/

and trying again with the first approach.

Your second approach seems to be missing the container port in the url.