Cloud-init on Alpine - how to use it?

LXD
1

I’ve just verified that cloud-init is available in image alpine/edge/cloud - but it’s not clear how one can use it during lxd launch?

I tried the setup which works on ubuntu:

lxc launch images:alpine/edge/cloud blabla -c user.network-config="#cloud-config....."

but it looks it does not work. How can I pass network configuration to Alpine then?

2

Hi,
Can you post your cloud-configuration?
Thanks.

3 
# NETWORK CONFIG
NC="#cloud-config
version: 1
config:
  - type: physical
    name: eth0
    subnets:
      - type: static
        ipv4: true
        address: $IP_4
        netmask: $MASK
        gateway: $GW
        control: auto
  - type: nameserver
    address:
      - $DNS
    search:
      - $MAIN_DOMAIN
"

$ are set by config script and filled properly, i hope it is clear

it works for ubuntu hosts

4

It is not a proper but it is working anyway. You can arrange as a profile like that.

config:
  user.user-data: |
    #cloud-config
    write_files:
      - path: /etc/network/interfaces
        permissions: 0644
        owner: root
        content: |
           auto lo
           iface lo inet loopback

           auto eth0
             iface eth0 inet static
             address $IP_4
             netmask $MASK
             gateway $GW
    runcmd:
      - rc-service networking restart
description: Test LXD profile
devices:
  eth0:
    name: eth0
    network: lxdbr0
    type: nic
  root:
    path: /
    pool: default
    type: disk
name: test1
5

It won’t work as a profile I’m afraid, as it contains variables which are set by installation script during lxd launch :frowning:

Any other ideas?

6

Humm, if you can produce the yaml file then everything is possible. A simple example.

indiana@mars:~$ more test.yaml 
#cloud-config
users:
  - default
  - name: foo
    gecos: Foo

indiana@mars:~$ lxc launch images:alpine/edge/cloud --config=user.user-data="$(cat test.yaml)"
Creating the instance
Instance name is: inspired-whale
Starting inspired-whale
indiana@mars:~$ lxc exec inspired-whale – getent passwd | grep -i foo
foo:x:1000:1000:Foo:/home/foo:/bin/ash

7

Whatever I do, I’m unable to set up network configuration. network specified according to Networking Config Version 1 — cloud-init 21.3 documentation is simply ignored.

My working workaround is:

!/bin/bash

DNS="1.1.1.1"
IP_4="2.2.2.2"
MASK="4.4.4.4"
GW="6.6.6.6"

# USER CONFIG
UC="#cloud-config
write_files:
  - content: |
      auto lo
      iface lo inet loopback
      auto eth0
      iface eth0 inet static
        address $IP_4
        netmask $MASK
        gateway  $GW
    owner: root:root 
    path: /etc/network/interfaces
    permissions: '0644'
manage_resolv_conf: true
resolv_conf:
  nameservers: ['$DNS']
runcmd:
  - [ /sbin/reboot ]
"
lxc launch images:alpine/edge/cloud $NAME --config user.user-data="$UC"