Ansible remote provision with LXC not working

[ba...@rtbrick.com]

Hi All,

I am trying to provision an LXC container using the ansible remote provisioner. But I am facing the issue where ansible is not able to connect to the machine.

The packer template(template.json) is given below

----
{
  "variables": {
    "template_name": "ubuntu",
    "template_parameters": "SUITE=trusty",
    "image_name": "rtbrick-generic",
    "version": "17.10.1",
  },
  "provisioners": [
      {
          "type": "ansible",
          "playbook_file": "rtbrick-setup-lxc-image.yaml",
          "ansible_env_vars": [ "ANSIBLE_HOST_KEY_CHECKING=False", "ANSIBLE_SSH_ARGS='-o ForwardAgent=yes -o ControlMaster=auto -o ControlPersist=60s'", "ANSIBLE_NOCOLOR=True" ],
          "extra_arguments": [ "--extra-vars", "ansible_sudo_pass=ubuntu ansible_ssh_pass=ubuntu ],
          "groups": ["lxc_host"],
          "host_alias": "rtbrick",
          "user": "ubuntu"
      }
  ],
  "builders": [
    {
      "type": "lxc",
      "name": "lxc-{{user `image_name`}}-{{user `version`}}",
      "output_directory": "lxc-{{user `image_name`}}-{{user `version`}}",
      "template_name": "{{user `template_name`}}",
      "config_file": "/usr/share/lxc/config/ubuntu.common.conf",
      "container_name": "rtbrick"
    }
  ]
}

----

The ansible playbook(rtbrick-setup-lxc-image.yaml) is given below:

-----
- name: Setup the Rtbrick containers on the host
  sudo: True
  hosts: lxc_host
  tasks:
    - name: Create BD config directory
      file: "path=/etc/rtbrick/bd/config state=directory"


-----




After running the command - packer build template.json, these are the messages I get -
lxc-rtbrick-generic-17.10.1 output will be in this color.

==> lxc-rtbrick-generic-17.10.1: Creating container...
==> lxc-rtbrick-generic-17.10.1: Waiting for container to finish init...
==> lxc-rtbrick-generic-17.10.1: Container finished init!
==> lxc-rtbrick-generic-17.10.1: Provisioning with shell script: scripts/base.sh
    lxc-rtbrick-generic-17.10.1: Hit http://ppa.launchpad.net trusty InRelease
    lxc-rtbrick-generic-17.10.1: Hit http://ppa.launchpad.net trusty/main amd64 Packages
    lxc-rtbrick-generic-17.10.1: Hit http://ppa.launchpad.net trusty/main Translation-en
    lxc-rtbrick-generic-17.10.1: Ign http://np.archive.ubuntu.com trusty InRelease
    lxc-rtbrick-generic-17.10.1: Get:1 http://np.archive.ubuntu.com trusty-updates InRelease [65.9 kB]
    lxc-rtbrick-generic-17.10.1: Get:2 http://np.archive.ubuntu.com trusty-security InRelease [65.9 kB]
    lxc-rtbrick-generic-17.10.1: Get:3 http://np.archive.ubuntu.com trusty Release.gpg [933 B]
    lxc-rtbrick-generic-17.10.1: Get:4 http://np.archive.ubuntu.com trusty-updates/main amd64 Packages [1,027 kB]
    lxc-rtbrick-generic-17.10.1: Get:5 http://np.archive.ubuntu.com trusty-updates/restricted amd64 Packages [17.1 kB]
    lxc-rtbrick-generic-17.10.1: Get:6 http://np.archive.ubuntu.com trusty-updates/universe amd64 Packages [429 kB]
    lxc-rtbrick-generic-17.10.1: Get:7 http://np.archive.ubuntu.com trusty-updates/multiverse amd64 Packages [14.3 kB]
    lxc-rtbrick-generic-17.10.1: Get:8 http://np.archive.ubuntu.com trusty-updates/main Translation-en [507 kB]
    lxc-rtbrick-generic-17.10.1: Get:9 http://np.archive.ubuntu.com trusty-updates/multiverse Translation-en [7,430 B]
    lxc-rtbrick-generic-17.10.1: Get:10 http://np.archive.ubuntu.com trusty-updates/restricted Translation-en [3,978 B]
    lxc-rtbrick-generic-17.10.1: Get:11 http://np.archive.ubuntu.com trusty-updates/universe Translation-en [232 kB]
    lxc-rtbrick-generic-17.10.1: Get:12 http://np.archive.ubuntu.com trusty Release [58.5 kB]
    lxc-rtbrick-generic-17.10.1: Get:13 http://np.archive.ubuntu.com trusty-security/main amd64 Packages [672 kB]
    lxc-rtbrick-generic-17.10.1: Get:14 http://np.archive.ubuntu.com trusty-security/restricted amd64 Packages [14.0 kB]
    lxc-rtbrick-generic-17.10.1: Get:15 http://np.archive.ubuntu.com trusty-security/universe amd64 Packages [188 kB]
    lxc-rtbrick-generic-17.10.1: Get:16 http://np.archive.ubuntu.com trusty-security/multiverse amd64 Packages [4,116 B]
    lxc-rtbrick-generic-17.10.1: Get:17 http://np.archive.ubuntu.com trusty-security/main Translation-en [363 kB]
    lxc-rtbrick-generic-17.10.1: Get:18 http://np.archive.ubuntu.com trusty-security/multiverse Translation-en [2,201 B]
    lxc-rtbrick-generic-17.10.1: Get:19 http://np.archive.ubuntu.com trusty-security/restricted Translation-en [3,491 B]
    lxc-rtbrick-generic-17.10.1: Get:20 http://np.archive.ubuntu.com trusty-security/universe Translation-en [108 kB]
    lxc-rtbrick-generic-17.10.1: Get:21 http://np.archive.ubuntu.com trusty/main amd64 Packages [1,350 kB]
    lxc-rtbrick-generic-17.10.1: Get:22 http://np.archive.ubuntu.com trusty/restricted amd64 Packages [13.0 kB]
    lxc-rtbrick-generic-17.10.1: Get:23 http://np.archive.ubuntu.com trusty/universe amd64 Packages [5,859 kB]
    lxc-rtbrick-generic-17.10.1: Get:24 http://np.archive.ubuntu.com trusty/multiverse amd64 Packages [132 kB]
    lxc-rtbrick-generic-17.10.1: Get:25 http://np.archive.ubuntu.com trusty/main Translation-en [762 kB]
    lxc-rtbrick-generic-17.10.1: Get:26 http://np.archive.ubuntu.com trusty/multiverse Translation-en [102 kB]
    lxc-rtbrick-generic-17.10.1: Get:27 http://np.archive.ubuntu.com trusty/restricted Translation-en [3,457 B]
    lxc-rtbrick-generic-17.10.1: Get:28 http://np.archive.ubuntu.com trusty/universe Translation-en [4,089 kB]
    lxc-rtbrick-generic-17.10.1: Ign http://np.archive.ubuntu.com trusty/main Translation-en_IN
    lxc-rtbrick-generic-17.10.1: Ign http://np.archive.ubuntu.com trusty/multiverse Translation-en_IN
    lxc-rtbrick-generic-17.10.1: Ign http://np.archive.ubuntu.com trusty/restricted Translation-en_IN
    lxc-rtbrick-generic-17.10.1: Ign http://np.archive.ubuntu.com trusty/universe Translation-en_IN
    lxc-rtbrick-generic-17.10.1: Fetched 16.1 MB in 6min 35s (40.7 kB/s)
    lxc-rtbrick-generic-17.10.1: Reading package lists...
    lxc-rtbrick-generic-17.10.1: Reading package lists...
    lxc-rtbrick-generic-17.10.1: Building dependency tree...
    lxc-rtbrick-generic-17.10.1: Reading state information...
    lxc-rtbrick-generic-17.10.1: The following packages will be upgraded:
    lxc-rtbrick-generic-17.10.1:   ca-certificates git git-man libidn11 libidn11-dev libvirt-dev libvirt0
    lxc-rtbrick-generic-17.10.1: 7 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
    lxc-rtbrick-generic-17.10.1: Need to get 4,664 kB of archives.
    lxc-rtbrick-generic-17.10.1: After this operation, 44.0 kB disk space will be freed.
    lxc-rtbrick-generic-17.10.1: Get:1 http://np.archive.ubuntu.com/ubuntu/ trusty-updates/main libidn11-dev amd64 1.28-1ubuntu2.2 [519 kB]
    lxc-rtbrick-generic-17.10.1: Get:2 http://np.archive.ubuntu.com/ubuntu/ trusty-updates/main libidn11 amd64 1.28-1ubuntu2.2 [94.6 kB]
    lxc-rtbrick-generic-17.10.1: Get:3 http://np.archive.ubuntu.com/ubuntu/ trusty-updates/main ca-certificates all 20170717~14.04.1 [167 kB]
    lxc-rtbrick-generic-17.10.1: Get:4 http://np.archive.ubuntu.com/ubuntu/ trusty-updates/main git-man all 1:1.9.1-1ubuntu0.7 [699 kB]
    lxc-rtbrick-generic-17.10.1: Get:5 http://np.archive.ubuntu.com/ubuntu/ trusty-updates/main git amd64 1:1.9.1-1ubuntu0.7 [2,252 kB]
    lxc-rtbrick-generic-17.10.1: Get:6 http://np.archive.ubuntu.com/ubuntu/ trusty-updates/main libvirt-dev amd64 1.2.2-0ubuntu13.1.23 [102 kB]
    lxc-rtbrick-generic-17.10.1: Get:7 http://np.archive.ubuntu.com/ubuntu/ trusty-updates/main libvirt0 amd64 1.2.2-0ubuntu13.1.23 [830 kB]
    lxc-rtbrick-generic-17.10.1: Preconfiguring packages ...
    lxc-rtbrick-generic-17.10.1: Fetched 4,664 kB in 3s (1,466 kB/s)
    lxc-rtbrick-generic-17.10.1: (Reading database ... 50903 files and directories currently installed.)
    lxc-rtbrick-generic-17.10.1: Preparing to unpack .../libidn11-dev_1.28-1ubuntu2.2_amd64.deb ...
    lxc-rtbrick-generic-17.10.1: Unpacking libidn11-dev (1.28-1ubuntu2.2) over (1.28-1ubuntu2.1) ...
    lxc-rtbrick-generic-17.10.1: Preparing to unpack .../libidn11_1.28-1ubuntu2.2_amd64.deb ...
    lxc-rtbrick-generic-17.10.1: Unpacking libidn11:amd64 (1.28-1ubuntu2.2) over (1.28-1ubuntu2.1) ...
    lxc-rtbrick-generic-17.10.1: Preparing to unpack .../ca-certificates_20170717~14.04.1_all.deb ...
    lxc-rtbrick-generic-17.10.1: Unpacking ca-certificates (20170717~14.04.1) over (20160104ubuntu0.14.04.1) ...
    lxc-rtbrick-generic-17.10.1: Preparing to unpack .../git-man_1%3a1.9.1-1ubuntu0.7_all.deb ...
    lxc-rtbrick-generic-17.10.1: Unpacking git-man (1:1.9.1-1ubuntu0.7) over (1:1.9.1-1ubuntu0.6) ...
    lxc-rtbrick-generic-17.10.1: Preparing to unpack .../git_1%3a1.9.1-1ubuntu0.7_amd64.deb ...
    lxc-rtbrick-generic-17.10.1: Unpacking git (1:1.9.1-1ubuntu0.7) over (1:1.9.1-1ubuntu0.6) ...
    lxc-rtbrick-generic-17.10.1: Preparing to unpack .../libvirt-dev_1.2.2-0ubuntu13.1.23_amd64.deb ...
    lxc-rtbrick-generic-17.10.1: Unpacking libvirt-dev (1.2.2-0ubuntu13.1.23) over (1.2.2-0ubuntu13.1.22) ...
    lxc-rtbrick-generic-17.10.1: Preparing to unpack .../libvirt0_1.2.2-0ubuntu13.1.23_amd64.deb ...
    lxc-rtbrick-generic-17.10.1: Unpacking libvirt0 (1.2.2-0ubuntu13.1.23) over (1.2.2-0ubuntu13.1.22) ...
    lxc-rtbrick-generic-17.10.1: Processing triggers for man-db (2.6.7.1-1ubuntu1) ...
    lxc-rtbrick-generic-17.10.1: Setting up libidn11:amd64 (1.28-1ubuntu2.2) ...
    lxc-rtbrick-generic-17.10.1: Setting up libidn11-dev (1.28-1ubuntu2.2) ...
    lxc-rtbrick-generic-17.10.1: Setting up ca-certificates (20170717~14.04.1) ...
    lxc-rtbrick-generic-17.10.1: Setting up git-man (1:1.9.1-1ubuntu0.7) ...
    lxc-rtbrick-generic-17.10.1: Setting up git (1:1.9.1-1ubuntu0.7) ...
    lxc-rtbrick-generic-17.10.1: Setting up libvirt0 (1.2.2-0ubuntu13.1.23) ...
    lxc-rtbrick-generic-17.10.1: Setting up libvirt-dev (1.2.2-0ubuntu13.1.23) ...
    lxc-rtbrick-generic-17.10.1: Processing triggers for libc-bin (2.19-0ubuntu6.13) ...
    lxc-rtbrick-generic-17.10.1: Processing triggers for ca-certificates (20170717~14.04.1) ...
    lxc-rtbrick-generic-17.10.1: Updating certificates in /etc/ssl/certs... 17 added, 42 removed; done.
    lxc-rtbrick-generic-17.10.1: Running hooks in /etc/ca-certificates/update.d....done.
    lxc-rtbrick-generic-17.10.1: Reading package lists...
    lxc-rtbrick-generic-17.10.1: Building dependency tree...
    lxc-rtbrick-generic-17.10.1: Reading state information...
    lxc-rtbrick-generic-17.10.1: The following extra packages will be installed:
    lxc-rtbrick-generic-17.10.1:   linux-headers-4.4.0-53
    lxc-rtbrick-generic-17.10.1: The following NEW packages will be installed:
    lxc-rtbrick-generic-17.10.1:   linux-headers-4.4.0-53 linux-headers-4.4.0-53-generic
    lxc-rtbrick-generic-17.10.1: 0 upgraded, 2 newly installed, 0 to remove and 0 not upgraded.
    lxc-rtbrick-generic-17.10.1: Need to get 10.7 MB of archives.
    lxc-rtbrick-generic-17.10.1: After this operation, 87.0 MB of additional disk space will be used.
    lxc-rtbrick-generic-17.10.1: Get:1 http://np.archive.ubuntu.com/ubuntu/ trusty-updates/main linux-headers-4.4.0-53 all 4.4.0-53.74~14.04.1 [9,952 kB]
    lxc-rtbrick-generic-17.10.1: Get:2 http://np.archive.ubuntu.com/ubuntu/ trusty-updates/main linux-headers-4.4.0-53-generic amd64 4.4.0-53.74~14.04.1 [778 kB]
    lxc-rtbrick-generic-17.10.1: Fetched 10.7 MB in 1s (5,464 kB/s)
    lxc-rtbrick-generic-17.10.1: Selecting previously unselected package linux-headers-4.4.0-53.
    lxc-rtbrick-generic-17.10.1: (Reading database ... 50877 files and directories currently installed.)
    lxc-rtbrick-generic-17.10.1: Preparing to unpack .../linux-headers-4.4.0-53_4.4.0-53.74~14.04.1_all.deb ...
    lxc-rtbrick-generic-17.10.1: Unpacking linux-headers-4.4.0-53 (4.4.0-53.74~14.04.1) ...
    lxc-rtbrick-generic-17.10.1: Selecting previously unselected package linux-headers-4.4.0-53-generic.
    lxc-rtbrick-generic-17.10.1: Preparing to unpack .../linux-headers-4.4.0-53-generic_4.4.0-53.74~14.04.1_amd64.deb ...
    lxc-rtbrick-generic-17.10.1: Unpacking linux-headers-4.4.0-53-generic (4.4.0-53.74~14.04.1) ...
    lxc-rtbrick-generic-17.10.1: Setting up linux-headers-4.4.0-53 (4.4.0-53.74~14.04.1) ...
    lxc-rtbrick-generic-17.10.1: Setting up linux-headers-4.4.0-53-generic (4.4.0-53.74~14.04.1) ...
    lxc-rtbrick-generic-17.10.1: Examining /etc/kernel/header_postinst.d.
    lxc-rtbrick-generic-17.10.1: run-parts: executing /etc/kernel/header_postinst.d/dkms 4.4.0-53-generic /boot/vmlinuz-4.4.0-53-generic
==> lxc-rtbrick-generic-17.10.1: Provisioning with Ansible...
==> lxc-rtbrick-generic-17.10.1: Executing Ansible: ansible-playbook --extra-vars packer_build_name=lxc-rtbrick-generic-17.10.1 packer_builder_type=lxc -i /tmp/packer-provisioner-ansible613077741 rtbrick-setup-lxc-image.yaml --private-key /tmp/ansible-key758394438 --extra-vars ansible_sudo_pass=ubuntu ansible_ssh_pass=ubuntu
    lxc-rtbrick-generic-17.10.1: [DEPRECATION WARNING]: Instead of sudo/sudo_user, use become/become_user and
    lxc-rtbrick-generic-17.10.1: make sure become_method is 'sudo' (default).
    lxc-rtbrick-generic-17.10.1: This feature will be removed in a
    lxc-rtbrick-generic-17.10.1: future release. Deprecation warnings can be disabled by setting
    lxc-rtbrick-generic-17.10.1: deprecation_warnings=False in ansible.cfg.
    lxc-rtbrick-generic-17.10.1:
    lxc-rtbrick-generic-17.10.1: PLAY [Setup the Rtbrick containers on the host] ********************************
    lxc-rtbrick-generic-17.10.1:
    lxc-rtbrick-generic-17.10.1: TASK [Gathering Facts] *********************************************************
==> lxc-rtbrick-generic-17.10.1: failed to handshake
==> lxc-rtbrick-generic-17.10.1: failed to handshake
==> lxc-rtbrick-generic-17.10.1: failed to handshake


I checked to see if I could ssh with the private key and inventory file details and faced the following issue:

shell request failed on channel 0



Can anyone help me with the same?

[Rickard von Essen]

Hi,

A LXC container doesn't run sshd. To run ansible against one you need to use a custom connection plugin like this 1). You can compare with the custom connection plugin used for WinRM which is in the docs. 

When you have a working example it would be awesome if you could post it here. 

1) https://github.com/Mic92/ansible-lxc/blob/master/README.md

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