How to use lxc profile set?

Question

I would like to edit LXD profiles from the command line. This is done by lxc profile set:

lxc profile get <profile> <key> Get profile configuration.

lxc profile set <profile> <key> <value> Set profile configuration.

What is the expected format of the <key> <value>? The output from lxc show profile suggests a dotted structure:

root@ubuntu ~# lxc profile show zoneminder
name: zoneminder
config:
  raw.lxc: lxc.aa_allow_incomplete=1
description: ""
devices:
  eth0:
    name: eth0
    nictype: bridged
    parent: zoneminder0
    type: nic

but I did not manage to get anything (not to mention - set). I tried various incantations (as an example lxc profile get zoneminder name, lxc profile get zoneminder lxc.name, ... to get the value of name above) but they all return nothing.

Solution

The basic syntax to get values is:

$ lxc profile get default somekey

However, to get something, you need to set it first. It appears you can only set known key values, i.e. those that actively mean something to lxd:

$ lxc profile set default rubbish 1
error: Bad key: rubbish

$ lxc profile set default limits.cpu 1

... and then you can retrieve it:

$ lxc profile get default limits.cpu
1

$ lxc profile show default
name: default
config:
  limits.cpu: "1"
description: Default LXD profile
devices:
  eth0:
    name: eth0
    nictype: bridged
    parent: lxdbr0
    type: nic

Devices appear to be special; the regular get/set access the "config" sub-field of the profile, but you need to use special commands to manipulate devices:

$ lxc profile device get default eth0 nictype
bridged

Comments

[lepe]

Another example, to change default pool: lxc profile device set default root pool newpool