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Accepted
Brad
Asked: 2024-03-11 11:24:44 +0800 CST

Set environment variable for runcmd

  • 772

Using cloud-init, I can specify a runcmd section and do something like this:

runcmd: [
  'MYVAR=VALUE some-command --a A --b B'
]

This works, and runs some-command with MYVAR set to VALUE in the environment. It runs under the shell.

However, I actually want to use the parameterized form, like this:

runcmd: [
  [
    'some-command',
    '--a', 'A',
    '--b', 'B'
  ]
]

The reason is that some of these parameter values will be dynamically substituted, and I don't want the shell trying to interpret them.

So, I can run commands with this array of strings just fine, but how I can I specify the environment for them?

cloud-init

1 Answers

  1. Best Answer

    You could use the env command to accomplish this:

    runcmd: [
  [
    'env',
    'MYVAR=VALUE',
    'some-command',
    '--a', 'A',
    '--b', 'B'
  ]
]

    See the env man page for more information.

    • 1