Ubuntu
cloud-init package

How to run cloud-config script manually?

Asked by Andy on 2016-08-29

Hello!

Does cloud-init have a mode to run cloud-config data manually?

To better describe the scenario, I'm working with cloud servers that have been pre-configured (OS/network/SSH/etc). The OS used is a mix of Ubuntu/CentOS. The cloud-init packages have not be pre-installed. I'd like to upload a stable cloud-init snapshot to the servers and do some basic provisioning with cloud-config ( using the examples: https://cloudinit.readthedocs.io/en/latest/topics/examples.html ). For example:

1. Upload cloud-init 0.7.7 to /opt/cloud-init/
2. Upload my cloud-config script to /root/provision.txt
3. Run /opt/cloud-init/some-command some-arg /root/provision.txt

I'd like to avoid the deep OS integration with cloud-init, if possible.

Thanks for reading.

Question information

Language:
English Edit question
Status:
Answered
For:
Ubuntu cloud-init Edit question
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Last query:
2016-08-29
Last reply:
2016-09-07
Scott Moser (smoser) said : #1

Generally speaking, cloud-init has 4 stages:
 a.) cloud-init local
      command: cloud-init init --local
      search for local datasources (config drive or NoCloud).
      this writes networking configuration either that it found from the datasource or "fallback" networking config.
  b.) cloud-init network
       command: cloud-init init
       search for data sources that require network
  c.) cloud-init config
        command: cloud-init modules --mode=config
   d.) cloud-init final
         command: cloud-init modules --mode=final

you can run those one after another, and probably come out with much of what you want, but networking is not likely to be brought up. cloud-init does not attempt to manually bring up networking, rather it writes configuration to the system and lets normal boot process bring the network up.

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