how to build images for docker and amazon-ebs from the same script, or "to sudo or not to sudo?"

[Kevin Pauli]

Newbie here, trying to figure out how to build both a docker image and an amazon-ebs ami from the same script.  Here I have stripped it down to the essentials:

{
  "builders": [
    {
      "type": "amazon-ebs",
      "ami_name": "my-ami",
      "instance_type": "t2.micro",
      "region": "us-east-1",
      "source_ami": "ami-f4cc1de2",
      "ssh_username": "ubuntu"
    },
    {
      "type": "docker",
      "image": "ubuntu:16.04"
    }
  ],
  "provisioners": [
    {
      "type": "shell",
      "inline": [
        "sleep 30",
        "sudo apt-get update"
      ]
    }
  ]
}

The problem is the "apt-get update" command...

If I do not include sudo, the docker build works but the amazon-ebs ami fails to provision with "Permission denied" errors.  

If I do include the sudo, the amazon-ebs build works but the docker build fails with "sudo: not found ". How to solve this?

[Rickard von Essen]

Just install sudo in the docker image in a shell provisioner with "only": [ "docker" ]. 

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[Kevin Pauli]

That worked great, thank you!

Two things I learned: 

1) sudo is a package that can be installed like any other (somehow I thought it was built-in to all Linuxes)

2) provisioners support the "only" attribute (somehow I missed that when reading the docs)

I like this because I'm now also able to run the "sleep 30" only on "amazon-ebs".  It is not necessary on "docker" and was unnecessarily delaying the build.


Thanks again

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[Alvaro Miranda Aguilera]

Hi kevin

could you share an updated json template for ppl coming in the future?

thanks!

Alvaro.

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Alvaro

[Kevin Pauli]

{
  "builders": [
    {
      "type": "amazon-ebs",
      "ami_name": "my-ami",
      "instance_type": "t2.micro",
      "region": "us-east-1",
      "source_ami": "ami-f4cc1de2",
      "ssh_username": "ubuntu"
    },
    {
      "type": "docker",
      "image": "ubuntu:16.04"
    }
  ],
  "provisioners": [
    {
      "type": "shell",

      "only": "amazon-ebs",
      "inline": [
        "sleep 30"
      ]
    }
    {
      "type": "shell",
      "only": "docker",
      "inline": [
        "apt-get install -y sudo"
      ]
    },
    {
      "type": "shell",
      "inline": [
        "sudo apt-get update"
      ]
    }

  ]
}

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For more options, visit https://groups.google.com/d/optout.

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Alvaro