Packer shell Provisioner

External

• https://www.packer.io/docs/provisioners/shell.htm

Internal

• Packer Concepts

shell Provisioner Types

inline

{
  ...
  "provisioners": [
    {
      "type": "shell",
      "inline": ["sudo yum install ansible"]
    },
  ... 
  ]
}

script

{
  ...
  "provisioners": [
    {
      "type": "shell",
      "only": [
        "my-builder"
      ],
      "environment_vars": [
        "SOMETHING={{ user `something` }}"
      ],
      "execute_command": "echo '' | {{ .Vars }} sudo -S -E -u root '{{ .Path }}'",
      "script": "scripts/something.sh"
    },
  ... 
  ]
}

While executing the script, its stdout will be relayed to the controlling terminal. However, the name of the script will not match the name of the local source script. Assuming that our script is ./scripts/something.sh, if we echo "executing $0" from it will get something similar to:

...
    infra-worker: executing /tmp/script_233.sh
...

scripts

{
  ...
  "provisioners": [
    {
      "type": "shell",
      "only": [
        "my-builder"
      ],
      "environment_vars": [
        "SOMETHING={{ user `something` }}"
      ],
      "execute_command": "echo '' | {{ .Vars }} sudo -S -E -u root '{{ .Path }}'",
      "scripts": [
        "scripts/something.sh",
        "scripts/something-else.sh",
       ]
    },
  ... 
  ]
}

Parameters

execute_command

A String that specifies the command to use to execute the script. The default value, unless specified, is:

chmod +x {{ .Path }}; {{ .Vars }} {{ .Path }}