According to cloud-init 0.7.9 documentation cloud-init is configured
to run by default on each boot [1] and to render the user-selected
network configuration on first boot [2]. Also, in absence of a data
source to configure the network, it will fall back to configuring DHCP
on eth0 [2].
As you noted, if you run a VM once, and then in the next regular run
the cloud-init flag is not selected in the VM configuration in engine,
there is no data-source and cloud-init falls back to dhcp as
documented.
The 'marker' file you refer to are also documented as follows:
* disabling cloud-init altogether [1] with: touch /etc/cloud/cloud-init.disabled
* preventing cloud-init from configuring the network [2] with: echo
‘network: {config: disabled}‘ >> /etc/cloud/cloud.cfg
whichever scenario is used to run a VM, this can be accomplished by
adding the above commands to the custom_script that cloud-init runs at
the last stage of its operation [3].
There is possibly a third 'hack' that would not require any marker file:
* assign your static IP to a NIC not named 'eth0'
I have not tested it myself but it looks like a corollary of [2]
HTH
[1] https://cloudinit.readthedocs.io/en/0.7.9/topics/boot.html#generator
[2] https://cloudinit.readthedocs.io/en/0.7.9/topics/boot.html#local
[3] https://cloudinit.readthedocs.io/en/0.7.9/topics/boot.html#final
On Wed, Nov 21, 2018 at 10:51 AM Mike Lykov <co...@ya.ru> wrote:
>
> 20.11.2018 15:30, Mike Lykov пишет:
>
> > "cloud-init used to use a "marker" file that it created on initial
> > execution. If that "marker" file existed it would not rerun on reboot. "
> > - are it not working in ovirt/this cloud-init version ?
>
> new restart:
>
> ----------
> 2018-11-21 12:40:53,314 - main.py[DEBUG]: Checking to see if files that
> we need already exist from a previous run that would allow us to stop early.
> 2018-11-21 12:40:53,315 - main.py[DEBUG]: Execution continuing, no
> previous run detected that would allow us to stop early.
> -------------
>
> which files it try to find ?
>
> --
> Mike
>
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