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Update cloud-init.rst

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Added additional documentation regarding the need to use "exec sg vyattacfg" to run script as the correct group, to avoid configuration pitfalls.
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patkarcarasent 2024-05-02 11:41:52 +02:00 committed by GitHub
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docs/automation/cloud-init.rst
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@ -156,6 +156,12 @@ can execute commands and then configure VyOS in the same script.
The following example sets the hostname based on the instance identifier
obtained from the EC2 metadata service.
Please observe that the same configuration pitfall described in :ref:`command-scripting`
exists here when running ``configure`` in any context as without user group
'vyattacfg' will cause the error message ``Set failed`` to appear.
We therefor need to wrap it and have the script re-execute itself with the correct
group permissions.
.. code-block:: yaml
@ -166,6 +172,9 @@ obtained from the EC2 metadata service.
permissions: '0775'
content: |
#!/bin/vbash
if [ "$(id -g -n)" != 'vyattacfg' ] ; then
exec sg vyattacfg -c "/bin/vbash $(readlink -f $0) $@"
fi
source /opt/vyatta/etc/functions/script-template
hostname=`curl -s http://169.254.169.254/latest/meta-data/instance-id`
configure