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Accepted
alci
Asked: 2015-07-21 05:41:59 +0800 CST

How to persist configuration changes accross restart with LXD containers?

  • 772

I am experimenting with LXD, but I'm stuck with a seamingly simple problem: I can't make my bridge config persistent.

The host server has a birdge br0. By default, lxd managed containers will use lxcbr0 and be on another network.

What I want is a container that will get its IP from my main DHCP server, and share the same network as the rest of my servers.

I managed to do so using this stanza:

lxc config set mycontainer raw.lxc 'lxc.network.link = br0'

This seems to work, but every now and then, the configuration gets lost, and the container falls back onto lxcbr0 !

  • So, is this the right way to get my container to use br0 ?
  • And what is the way to make this persistent for real ?
networking

1 Answers

  1. Best Answer

    I solved this using a profile.

    lxc config profile edit bridge

    Then in the editor:

    name: bridge
config: {}
devices:
    eth0:
        nictype: bridged
        parent: br0
        type: nic

    And when creating a guest/container, specify the profile

    lxc launch ubuntu GUESTNAME -p bridge

    Not sure, but assume you can apply the profile to existing guests/containers as well. Have not tried it.

    EDIT:
    From lxd 0.18 profile is part of main commands:

    lxc profile edit bridge

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