Cloud-Init Data Recognized

cloud-init-pve only recognizes the subset of cloud-init data that Proxmox uses in its default configuration: user-data and network-config, read from the NoCloud config drive Proxmox attaches to the VM.

User data

Field	Handling
chpasswd	Ignored.
fqdn	Applied only on the first run.
hostname	Ignored in favor of fqdn.
package_upgrade	Honored only on the first run.
password	If set, update the user's password to this value, which Proxmox VE always writes as an already-hashed (crypt) string rather than plaintext.
ssh_authorized_keys	Added to the user's authorized_keys (see Backends).
user	If set, create a user with that name; otherwise use the template's default user.
users	Ignored.

Network data

If an interface is not listed, it is left untouched — no configuration change is applied to it.

type: physical

Field	Handling
name	Rename the interface to this name.
mac_address	Used to match the interface.
subnets	IPv4 and IPv6 config applied to the interface.

type: nameserver

Field	Handling
address	List of nameserver addresses.
search	List of domains searched for unqualified names.