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cloud init: mention that serial display might not work for all images

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Example from the community forum:
https://forum.proxmox.com/threads/112225/

Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
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Fiona Ebner 2022-09-22 11:33:15 +02:00 committed by Thomas Lamprecht
parent 88cb121433
commit 2050eb1946
1 changed files with 7 additions and 4 deletions
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qm-cloud-init.adoc
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@ -33,8 +33,10 @@ Cloud-Init data.
{pve} generates an ISO image to pass the Cloud-Init data to the VM. For {pve} generates an ISO image to pass the Cloud-Init data to the VM. For
that purpose, all Cloud-Init VMs need to have an assigned CD-ROM drive. that purpose, all Cloud-Init VMs need to have an assigned CD-ROM drive.
Also many Cloud-Init images assume to have a serial console, so it is Usually, a serial console should be added and used as a display. Many Cloud-Init
recommended to add a serial console and use it as display for those VMs. images rely on this, it is a requirement for OpenStack. However, other images
might have problems with this configuration. Switch back to the default display
configuration if using a serial console doesn't work.
Preparing Cloud-Init Templates Preparing Cloud-Init Templates
@ -93,8 +95,9 @@ a bootable CD-ROM.
qm set 9000 --boot c --bootdisk scsi0 qm set 9000 --boot c --bootdisk scsi0
---- ----
Also configure a serial console and use it as a display. Many Cloud-Init For many Cloud-Init images, it is required to configure a serial console and use
images rely on this, as it is an requirement for OpenStack images. it as a display. If the configuration doesn't work for a given image however,
switch back to the default display instead.
---- ----
qm set 9000 --serial0 socket --vga serial0 qm set 9000 --serial0 socket --vga serial0