Add session_server configuration

[kayman-mk]

Description

This feature allows you to open an interactive web terminal an run one-off commands in your CI pipeline. See Interactive Web Terminals.

The connection can be established via an EIP (enable_eip) or via an ALB (session_server_listener_arn). The EIP part was already implemented. This PR adds the logic for the ALB.

Migrations required

NO

Verification

Deployed this version of the module in the Hapag-Lloyd development system and ran some jobs against it. Verified that it is possible to open the Web Terminal using EIP and ALB.

Documentation

Root README.md updated.

Closes #92

[kayman-mk]

@npalm Still an ongoing PR. I am running out of time at the moment. My guess is, that it is already complete. But the final check is still missing.

[kayman-mk]

Hi @npalm, any chance to test this PR? I tried it today but it seems that I do not have access to all ports of an EC2 instance in our cloud.
What I have seen so far: The runner is started (and processes incoming jobs) and Gitlab shows the "Debug" button next to "Retry/Cancel". But when I open the web terminal via "Debug" it reports "Connection failed". I guess it is due to blocked ports. Any chance to verify that?

You have to add the following parameters to the configuration.

enable_eip = true

  session_server = {
    timeout = 900,
    port = 8093,
    listen_address = "0.0.0.0",
    advertise_address = "<public eip of the agent>",
    listener_arn = "",
    alb_security_group_id = "",
    incoming_cidr_blocks = ["0.0.0.0/0"]
  }

Best regards
Matthias

[npalm]

@kayman-mk I will do my best to test the PR in the coming days. Since it is still in draft I did not looked at it.. Also one of the CI tasks is failing.

[kayman-mk]

Thanks, Niek. The failing task is the source formatting.

[strowi]

hi,

any update on this?

[kayman-mk]

Nice feature, but not needed at the moment on our side. Looks like the PR is too old to simply finish it.