CODEWITHSUNDEEP
cloud-initrhel8
Krist van Besien
Krist van Besien

Reputation: 591

How do I execute a script with Cloudinit, using the nocloud data source

I am trying to automate provisioning of linux machines (rhel8) using cloudinit.

For this purpose I created an ISO with the following content:

[root@]# tree rhel82test1/
rhel82test1/
├── meta-data
├── network-config
├── scripts
│   └── per-instance
│       └── demo.sh
└── user-data

2 directories, 4 files

This iso gets added to the VM during virt-install.

The user-data, meta-data and network-config get applied as expected. However I expected the demo.sh script to be executed as well. I see in the logs that config-scripts-per-instance gets run, but the script is not executed. It is als not present in /var/lib/cloud/instance/scripts

What am I doing wrong here. Is this not the correct way to have scripts executed?

Upvotes: 0

Views: 660

Answers (2)

Anders Eurenius
Anders Eurenius

Reputation: 4226

This caused me a lot of grief, and it feels intentional, something to do with competing clown-providers, but that could be the pain talking. I guess they really could be dumber than a bag of hammers. I mean, cloud-init isn't exactly the most elegant project out there.

Anyway, for my cloud-init 24.1.3 on Alpine 3.20.3, putting the script in /var/lib/cloud/scripts/per-instance/ using write_files (in user-data) does the trick, like this:

write_files:
- path: /var/lib/cloud/scripts/per-instance/too_dumb_to_breathe
  owner: "root:root"
  permissions: "0755"
  defer: false
  content: |
    #!/bin/sh
    echo "hello..." >/dev/tty0
    set -e
    mount $(blkid | grep 'LABEL="cidata"' | cut -d: -f1) /mnt
    echo "looks like cidata is accessible:" >/dev/tty0
    ls -R /mnt >/dev/tty0

The write apparently happens before that directory is scanned for scripts to run, so it happens to work here, but it doesn't seem like intentional behaviour. I can't find anything in the docs to say so, anyway.

Upvotes: 0

Rep
Rep

Reputation: 21

See source, not implemented for NoCloud

Upvotes: 1

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