Launching service in Docker container and connecting from primary

Build Environment
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1

I’m having trouble figuring out how to connect to an SFTP server I want to run as part of my docker setup. Here is the configuration that I"m using to launch the SFTP container:

  - run:
      name: Run Docker FTP test server
      command: |
        docker run --restart=always \
                   -p 2222:22 \
                   --name sftp_test_server \
                   -d atmoz/sftp foo:pass:::from_no

I’m having trouble connecting to it from my main app. How do I find the hostname for this container and make sure it’s in the same network? When my test suite runs my app can’t find this service.

2

If you run this image inside the image section of your YAML config file, it may be easier - CircleCI exposes secondary container listeners on localhost.

Alternatively you could put your FTP server and your main app in separate containers and run them both using Docker Compose. That’s what I do, and it works fine.

Your approach of using docker run should work, but you’d need to find what IP it attaches to - perhaps you could SSH in and use nstat?

3

How can I ssh into the container and use nstat? I haven’t done that before and not sure how to do it on CircleCI

4

To use Nstat, you just need to search and say what you want to do.

To use SSH, find a failed job in the CircleCI user interface, click into the detail view, and click “Rerun job with SSH”.

5

Thanks for the info on nstat. This is the solution that I found works for what I’m trying to do:

jobs:
  build:
    docker:

      - image: atmoz/sftp
        command: ["foo:pass:::from_no"]
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6

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