Failing to test Java program using Docker in CircleCI

Build Environment
1

Hello team,

I am testing java program using below circle configuration.

version: 2
jobs:
  build:
    working_directory: /app
    docker:
      - image: docker:17.05.0-ce-git
    steps:
      - checkout
      - run:
          name: Pulling java docker.
          command: |
            docker pull java:7
      - run:
          name: Create class file using java docker.
          command: |
            docker run --rm -v"$PWD":/usr/src/myapp -w /usr/src/myapp java:7 javac -d . JavProg.java
      - run:
          name: Compiling and Executing java class files using java docker.
          command: |
            docker run --rm -v"$PWD":/usr/src/myapp -w /usr/src/myapp java:7 java learnjava.JavProg
      - run:
          name: Displaying java class.
          command: |
            docker run --rm -v"$PWD":/usr/src/myapp -w /usr/src/myapp java:7 javap learnjava.JavProg

My Project repository link : https://github.com/hemanth22/MyJavaLearning/tree/hemanth22-patch-2

Can you please check and advice.

Thanks and regards,
Hemanth.

3

Hello halfer,

I have updated my post with code formatting.

Can you please advice how why it is failing when use docker repo

Thanks,
Hemanth

4

May we see the console output for the failing step? Please paste it here, in a formatted text block. Thanks!

(If all you are doing with Docker is compiling and running a Java program, you may find it easier to just install Java into your VM).

5

Hello Halfer,

I am getting below error in Pulling java docker step .
Please find the link of circle ci output here: https://circleci.com/gh/hemanth22/MyJavaLearning/39?utm_campaign=vcs-integration-link&utm_medium=referral&utm_source=github-build-link

#!/bin/sh -eo pipefail
docker pull java:7
Warning: failed to get default registry endpoint from daemon (Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?). Using system default: https://index.docker.io/v1/
Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?
Exited with code 1
6

After your checkout step, try some commands to see if Docker is running. Let us know what you get with this:

ps aux | grep docker

Also, try connecting with Docker using a privileged user, and show us what that gives you:

sudo docker ps
7

Hello halfer,

Issue us resolved after changing config as below.

 version: 2
jobs:
  build:
working_directory: /app
docker:
  - image: java:7
steps:
  - checkout
  - run: javac -d . JavProg.java
  - run: java learnjava.JavProg
  - run: javap learnjava.JavProg

Please mark this issue as resolved.

Thanks,
Hemanth

8

Nice work :smiley:

You can do that yourself, by clicking the “solved” icon in the appropriate post. You do not need to add [solved] edits to the title.

9

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