Docker builder with CMD doesn't work

[Raghava Karthik]

I was trying to run a command using CMD along with ENTRYPOINT (entrypoint works perfectly). 

All i want to do is load environment variables "source /etc/environment". Below packer conf with CMD isn't working. Am i missing something here?

"builders":[{

        "type": "docker",

        "name": "image_with_tomcat",

        "image": "{{user `base_image`}}",

        "commit": true,

        "pull": true,

        "changes": [

                "CMD source /etc/environment",

                "ENTRYPOINT  /usr/local/tomcat/bin/catalina.sh start && /bin/bash"

            ],

        "run_command": ["-d", "-i", "-t", "{{.Image}}", "/bin/bash"]

    }],

[Rickard von Essen]

Could you justify "doesn't work", for example what's the output of "docker inspect <sha of the resulting image>"?

--
This mailing list is governed under the HashiCorp Community Guidelines - https://www.hashicorp.com/community-guidelines.html. Behavior in violation of those guidelines may result in your removal from this mailing list.
 
GitHub Issues: https://github.com/mitchellh/packer/issues
IRC: #packer-tool on Freenode
---
You received this message because you are subscribed to the Google Groups "Packer" group.
To unsubscribe from this group and stop receiving emails from it, send an email to packer-tool+unsubscribe@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/packer-tool/a784d882-ebee-40b8-a306-868e161c709b%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

[Raghava Karthik]

I can see the command " /bin/sh -c source /etc/environments" in docker inspect , but when i run the container the environment variables cannot be found to be used.

Although for now it works with  "ENTRYPOINT  source /etc/environment && /usr/local/tomcat/bin/catalina.sh start && /bin/bash". but i cant figure out why CMD is not executed.

Thanks,
Karthik

[Rickard von Essen]

It is executed but in it's own shell since you use the shell form not the exec form.

See

https://www.ctl.io/developers/blog/post/dockerfile-entrypoint-vs-cmd/

--

This mailing list is governed under the HashiCorp Community Guidelines - https://www.hashicorp.com/community-guidelines.html. Behavior in violation of those guidelines may result in your removal from this mailing list.
 
GitHub Issues: https://github.com/mitchellh/packer/issues
IRC: #packer-tool on Freenode
---
You received this message because you are subscribed to the Google Groups "Packer" group.
To unsubscribe from this group and stop receiving emails from it, send an email to packer-tool+unsubscribe@googlegroups.com.

To view this discussion on the web visit https://groups.google.com/d/msgid/packer-tool/d7ada9e1-7fa8-42ad-acd4-1c897e6222fc%40googlegroups.com.

[Raghava Karthik]

I used "exec"  method and still i couldn't able to make CMD run, i replaced that with CMD [\"touch\", \"/tmp/environment\"]" but alas no effect.

"builders":[{

        "type": "docker",

        "name": "image_with_tomcat",

        "image": "{{user `base_image`}}",

        "commit": true,

        "pull": true,

        "changes": [

                "CMD [\"source\", \"/etc/environment\"]",

                "ENTRYPOINT [\"/usr/local/tomcat/bin/catalina.sh \",\"start\"]"

            ]

    }],

I saw the question here https://github.com/hashicorp/packer/issues/4914  , I actually didn't get what mikeroll said. Is this issue with docker commit.

[sandy k]

There is problem with your Json,

This should fix your problem https://groups.google.com/forum/#!topic/packer-tool/WJHWnEczU-4

[Raghava Karthik]

I was able to make it work using only ENTRYPOINT with script. Using CMD alone works too but the env's are loaded in another shell. 

Thanks for the reply.