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cloud-config can be provided via the kernel command line.
configuration that comes from the kernel command line has higher priority
than configuration in /etc/cloud/cloud.cfg
The format is:
cc: <yaml content here> [end_cc]
cloud-config will consider any content after 'cc:' to be cloud-config
data. If an 'end_cc' string is present, then it will stop reading there.
otherwise it considers everthing after 'cc:' to be cloud-config content.
In order to allow carriage returns, you must enter '\\n', literally,
on the command line two backslashes followed by a letter 'n'.
Here are some examples:
root=/dev/sda1 cc: ssh_import_id: [smoser, kirkland]\\n
root=LABEL=uec-rootfs cc: ssh_import_id: [smoser, bob]\\nruncmd: [ [ ls, -l ], echo hi ] end_cc
cc:ssh_import_id: [smoser] end_cc cc:runcmd: [ [ ls, -l ] ] end_cc root=/dev/sda1
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