Windows Hosted Runner: Docker calls to wrong host inside runner

[maldoe1990]

Hello Community,

I also asked that question on SO but thought its more bitbucket specific so it would be good to ask this question here:

Ive got a windows runnter on my  win2019 server wit latest docker installed.

As suggested here: https://github.com/StefanScherer/dockerfiles-windows/tree/main/dockertls

I set up docker for tcp with activated TLS.

So far so good.

Outside the pipeline the script works just fine - also from my workstation im able to deploy the docker-compose project to my server.

However when it comes to run the exact same command inside the pipeline it ends up using the wrong host/port:

Command:  docker -H tcp://<ip>:2376 --tls --tlsverify --tlscacert=.\.dockercert\ca.pem --tlscert=.\.dockercert\cert.pem --tlskey=.\.dockercert\key.pem compose up -f <my yml files>...

Result:

error during connect: Get "http://localhost:2375/v1.24/containers/json?all=1&filters=...": dial tcp [::1]:2375: connectex: No connection could be made because the target machine actively refused it.

You can see somehow inside the pipeline docker tries to connect to http://localhost:2375 instead of "<ip>:2376". 

So I asume somethings happening inside the runner that changes the host or even removed the param, but I thought its just a java application that run on my powershell.

The cert files exist and as mentioned no problems when I run the command from any other mashine.

Any idea  how to fix it?

Best,

Malte

[Theodora Boudale]

Hi @maldoe1990,

You mentioned

Outside the pipeline the script works just fine - also from my workstation im able to deploy the docker-compose project to my server.

Is the workstation the same as your Windows 2019 Server where the Bitbucket runner is running?

• If not, can you copy the certificates on that server, then try running the Docker command you provided here on that server, and let me know if it works or if you get the same error?
  
  
• Could you also please check if any Docker configuration files or any environment variables on this server have “localhost” configured on port 2375?

Kind regards,
Theodora

[maldoe1990]

Hi @Theodora Boudale 

I tried with the same certificates on the server. It worked as intended. No Docker Host Env Vars so far.

It fails only when running the command inside windows runner

My config for docker deamon:

{
  "data-root": "D:\\Docker-Data",
  "tlscacert": "C:\\ProgramData\\docker\\certs.d\\ca.pem",
  "tlskey": "C:\\ProgramData\\docker\\certs.d\\server-key.pem",
  "tlscert": "C:\\ProgramData\\docker\\certs.d\\server-cert.pem",
  "hosts": [
    "tcp://0.0.0.0:2376",
    "npipe://"
  ],
  "tlsverify": true
}

[Theodora Boudale]

Hi Malte,

I discussed this issue with the development team, Docker hasn't been tested for Windows Runners yet and it is therefore not supported.

I created a feature request in our issue tracker to add support for Docker on Windows Runners: https://jira.atlassian.com/browse/BCLOUD-22187

I would suggest adding your vote to that feature request to express your interest.

Currently, we are setting the variable DOCKER_HOST to tcp://localhost:2375 by default which can lead to issues, I am unsure though why you see http://localhost:2375 in the output.

Can you try adding the following command in the script of your bitbucket-pipelines.yml file (before the docker command) and check if your build can run afterwards?

$env:DOCKER_HOST = ""

Kind regards,
Theodora

[maldoe1990]

Worked for me thanks :-) 

[Theodora Boudale]

That's good to hear, thank you for the update!

Please feel free to reach out if you ever need anything else!