Cloud-config write_files only writing the first file in config

LXD
1

I’m trying to set up an LXD profile to do some basic init tasks upon creation of an Arch Linux container, but I’m having trouble with the write_files: section. Only the first file that I list in the section is getting written, and the rest are being ignored, and I’m not sure why. Here’s the profile I’m trying to use:

 config:
  boot.autostart: "false"
  boot.autostart.priority: "98"
  security.nesting: "true"
  user.vendor-data: |
    #cloud-config
    users:
      - name: ****
        ssh_authorized_keys:
          - ssh-ed25519 ***
          - ssh-ed25519 ***
        plain_text_passwd: '********'
        lock_passwd: false
        sudo: ALL=(ALL) ALL
        shell: /bin/bash

    packages:
      - openssh

    runcmd:
      - echo "en_US.UTF-8 UTF-8" > /etc/locale.gen
      - locale-gen
      - localectl set-locale en_US.UTF-8
      - localectl set-keymap us
      - timedatectl set-timezone America/New_York
      - chown -R ****:**** /home/****
      - groupadd -g 1010 zfswrite
      - usermod -aG zfswrite ****
      - sed -i 's/#PasswordAuthentication yes/PasswordAuthentication no/' /etc/ssh/sshd_config
      - systemctl enable sshd
      - systemctl start sshd

    write_files:
      - encoding: b64
        owner: ****:****
        permissions: '0644'
        path: /home/****/.bash_profile
        content: |
          IwojIH4vLmJhc2hfcHJvZmlsZQojCgpbWyAtZiB+Ly5iYXNocmMgXV0gJiYgLiB+Ly5iYXNocmMK
      - encoding: gz+b64
        owner: ****:****
        permissions: '0644'
        path: /home/****/.bashrc
        content: |
          H4sICBtAgGAAAzIuYmFzaHJjAJVUUU/bMBB+96+4tWgBRChlgoeiSJu6slUCOrXwMlohN7kQi9TO
          bKehE9pv39luKdvYpFVqmjt/d9935+u1WRt+dA7n3BQ6ZW1G5jAHqSzoWkoh70FIi5qnViyxXB1A
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      - encoding: gz+b64
        owner: root:root
        path: /etc/nanorc
        content: |
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description: Default LXD profile
devices:
  eth0:
    name: eth0
    nictype: bridged
    parent: br0
    type: nic
  root:
    path: /
    pool: default
    type: disk
name: arch-default

Any help would be greatly appreciated!

2

Also, I’ve noticed that the security.nesting setting isn’t getting applied to created containers. Is that possibly related?

3

And you’re creating using -p arch-default and looking at the resulting config with lxc config show --expanded NAME-OF-CONTAINER ?

4

Sorry, didn’t notice the --expanded modifier. Now it shows up. Wonder why docker isn’t working then.

Would you know where I can get help with my cloud-config issues?

5

Usually you’ll want to check at the cloud-init log files in /var/log and also check /var/lib/cloud/seed to confirm the right YAML made it in.

Note that cloud-init is only templated on creation, so changing the profile and restarting the container won’t work, you need to create a new container or use this workaround:

  • lxc config set NAME volatile.apply_template create
  • lxc start NAME
6

Thanks. I’m seeing this error in /var/log/lxd/CONTAINER/console.log:

[188876.988518] cloud-init[107]: 2021-04-29 17:28:24,006 - util.py[WARNING]: Running module write-files (<module 'cloudinit.config.cc_write_files' from '/usr/lib/python3.9/site-packages/cloudinit/config/cc_write_files.py'>) failed

Wait, you meant in the container, sorry. Let me look there.

7

Okay, it looks like the user isn’t created before the file?

2021-04-29 17:28:24,006 - util.py[DEBUG]: Running module write-files (<module 'cloudinit.config.cc_write_files' from '/usr/lib/python3.9/site-packages/cloudinit/config/cc_write_files.py'>) failed
Traceback (most recent call last):
  File "/usr/lib/python3.9/site-packages/cloudinit/util.py", line 1350, in chownbyname
    uid = pwd.getpwnam(user).pw_uid
KeyError: "getpwnam(): name not found: 'chris'"

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/usr/lib/python3.9/site-packages/cloudinit/stages.py", line 874, in _run_modules
    ran, _r = cc.run(run_name, mod.handle, func_args,
  File "/usr/lib/python3.9/site-packages/cloudinit/cloud.py", line 54, in run
    return self._runners.run(name, functor, args, freq, clear_on_fail)
  File "/usr/lib/python3.9/site-packages/cloudinit/helpers.py", line 185, in run
    results = functor(*args)
  File "/usr/lib/python3.9/site-packages/cloudinit/config/cc_write_files.py", line 172, in handle
    write_files(name, files)
  File "/usr/lib/python3.9/site-packages/cloudinit/config/cc_write_files.py", line 212, in write_files
    util.chownbyname(path, u, g)
  File "/usr/lib/python3.9/site-packages/cloudinit/util.py", line 1354, in chownbyname
    raise OSError("Unknown user or group: %s" % (e)) from e
OSError: Unknown user or group: "getpwnam(): name not found: 'chris'"

Is there a workaround for this? Does the run command section run after write_files?