..
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  GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
  SPDX-License-Identifier: GPL-3.0-or-later

.. _ansible_collections.community.general.docsite.guide_packet:

**********************************
Packet.net Guide
**********************************

Introduction
============

`Packet.net <https://packet.net>`_ is a bare metal infrastructure host that is supported by the community.general collection through six cloud modules. The six modules are:

- :ansplugin:`community.general.packet_device#module`: manages servers on Packet. You can use this module to create, restart and delete devices.
- :ansplugin:`community.general.packet_ip_subnet#module`: assign IP subnet to a bare metal server
- :ansplugin:`community.general.packet_project#module`: create/delete a project in Packet host
- :ansplugin:`community.general.packet_sshkey#module`: adds a public SSH key from file or value to the Packet infrastructure. Every subsequently-created device will have this public key installed in .ssh/authorized_keys.
- :ansplugin:`community.general.packet_volume#module`: create/delete a volume in Packet host
- :ansplugin:`community.general.packet_volume_attachment#module`: attach/detach a volume to a device in the Packet host

Note, this guide assumes you are familiar with Ansible and how it works. If you are not, have a look at their :ref:`docs <ansible_documentation>` before getting started.

Requirements
============

The Packet modules connect to the Packet API using the `packet-python package <https://pypi.org/project/packet-python/>`_. You can install it with pip:

.. code-block:: console

    $ pip install packet-python

In order to check the state of devices created by Ansible on Packet, it is a good idea to install one of the `Packet CLI clients <https://www.packet.net/developers/integrations/>`_. Otherwise you can check them through the `Packet portal <https://app.packet.net/portal>`_.

To use the modules you will need a Packet API token. You can generate an API token through the Packet portal `here <https://app.packet.net/portal#/api-keys>`__. The simplest way to authenticate yourself is to set the Packet API token in an environment variable:

.. code-block:: console

    $ export PACKET_API_TOKEN=Bfse9F24SFtfs423Gsd3ifGsd43sSdfs

If you are not comfortable exporting your API token, you can pass it as a parameter to the modules.

On Packet, devices and reserved IP addresses belong to `projects <https://www.packet.com/developers/api/#projects>`_. In order to use the packet_device module, you need to specify the UUID of the project in which you want to create or manage devices. You can find a project's UUID in the Packet portal `here <https://app.packet.net/portal#/projects/list/table/>`_ (it is just under the project table) or through one of the available `CLIs <https://www.packet.net/developers/integrations/>`_.


If you want to use a new SSH key pair in this tutorial, you can generate it to ``./id_rsa`` and ``./id_rsa.pub`` as:

.. code-block:: console

    $ ssh-keygen -t rsa -f ./id_rsa

If you want to use an existing key pair, just copy the private and public key over to the playbook directory.


Device Creation
===============

The following code block is a simple playbook that creates one `Type 0 <https://www.packet.com/cloud/servers/t1-small/>`_ server (the ``plan`` parameter). You have to supply ``plan`` and ``operating_system``. ``location`` defaults to ``ewr1`` (Parsippany, NJ). You can find all the possible values for the parameters through a `CLI client <https://www.packet.net/developers/integrations/>`_.

.. code-block:: yaml+jinja

    # playbook_create.yml

    - name: Create Ubuntu device
      hosts: localhost
      tasks:

        - community.general.packet_sshkey:
            key_file: ./id_rsa.pub
            label: tutorial key

        - community.general.packet_device:
            project_id: <your_project_id>
            hostnames: myserver
            operating_system: ubuntu_16_04
            plan: baremetal_0
            facility: sjc1

After running ``ansible-playbook playbook_create.yml``, you should have a server provisioned on Packet. You can verify through a CLI or in the `Packet portal <https://app.packet.net/portal#/projects/list/table>`__.

If you get an error with the message "failed to set machine state present, error: Error 404: Not Found", please verify your project UUID.


Updating Devices
================

The two parameters used to uniquely identify Packet devices are: "device_ids" and "hostnames". Both parameters accept either a single string (later converted to a one-element list), or a list of strings.

The ``device_ids`` and ``hostnames`` parameters are mutually exclusive. The following values are all acceptable:

- device_ids: ``a27b7a83-fc93-435b-a128-47a5b04f2dcf``

- hostnames: ``mydev1``

- device_ids: ``[a27b7a83-fc93-435b-a128-47a5b04f2dcf, 4887130f-0ccd-49a0-99b0-323c1ceb527b]``

- hostnames: ``[mydev1, mydev2]``

In addition, hostnames can contain a special ``%d`` formatter along with a ``count`` parameter that lets you easily expand hostnames that follow a simple name and number pattern; in other words, ``hostnames: "mydev%d", count: 2`` will expand to [mydev1, mydev2].

If your playbook acts on existing Packet devices, you can only pass the ``hostname`` and ``device_ids`` parameters. The following playbook shows how you can reboot a specific Packet device by setting the ``hostname`` parameter:

.. code-block:: yaml+jinja

    # playbook_reboot.yml

    - name: reboot myserver
      hosts: localhost
      tasks:

        - community.general.packet_device:
            project_id: <your_project_id>
            hostnames: myserver
            state: rebooted

You can also identify specific Packet devices with the ``device_ids`` parameter. The device's UUID can be found in the `Packet Portal <https://app.packet.net/portal>`_ or by using a `CLI <https://www.packet.net/developers/integrations/>`_. The following playbook removes a Packet device using the ``device_ids`` field:

.. code-block:: yaml+jinja

    # playbook_remove.yml

    - name: remove a device
      hosts: localhost
      tasks:

        - community.general.packet_device:
            project_id: <your_project_id>
            device_ids: <myserver_device_id>
            state: absent


More Complex Playbooks
======================

In this example, we will create a CoreOS cluster with `user data <https://packet.com/developers/docs/servers/key-features/user-data/>`_.


The CoreOS cluster will use `etcd <https://etcd.io/>`_ for discovery of other servers in the cluster. Before provisioning your servers, you will need to generate a discovery token for your cluster:

.. code-block:: console

    $ curl -w "\n" 'https://discovery.etcd.io/new?size=3'

The following playbook will create an SSH key, 3 Packet servers, and then wait until SSH is ready (or until 5 minutes passed). Make sure to substitute the discovery token URL in ``user_data``, and the ``project_id`` before running ``ansible-playbook``. Also, feel free to change ``plan`` and ``facility``.

.. code-block:: yaml+jinja

    # playbook_coreos.yml

    - name: Start 3 CoreOS nodes in Packet and wait until SSH is ready
      hosts: localhost
      tasks:

        - community.general.packet_sshkey:
            key_file: ./id_rsa.pub
            label: new

        - community.general.packet_device:
            hostnames: [coreos-one, coreos-two, coreos-three]
            operating_system: coreos_beta
            plan: baremetal_0
            facility: ewr1
            project_id: <your_project_id>
            wait_for_public_IPv: 4
            user_data: |
              # cloud-config
              coreos:
                etcd2:
                  discovery: https://discovery.etcd.io/<token>
                  advertise-client-urls: http://$private_ipv4:2379,http://$private_ipv4:4001
                  initial-advertise-peer-urls: http://$private_ipv4:2380
                  listen-client-urls: http://0.0.0.0:2379,http://0.0.0.0:4001
                  listen-peer-urls: http://$private_ipv4:2380
                fleet:
                  public-ip: $private_ipv4
                units:
                  - name: etcd2.service
                    command: start
                  - name: fleet.service
                    command: start
          register: newhosts

        - name: wait for ssh
          ansible.builtin.wait_for:
            delay: 1
            host: "{{ item.public_ipv4 }}"
            port: 22
            state: started
            timeout: 500
          loop: "{{ newhosts.results[0].devices }}"


As with most Ansible modules, the default states of the Packet modules are idempotent, meaning the resources in your project will remain the same after re-runs of a playbook. Thus, we can keep the ``packet_sshkey`` module call in our playbook. If the public key is already in your Packet account, the call will have no effect.

The second module call provisions 3 Packet Type 0 (specified using the ``plan`` parameter) servers in the project identified by the ``project_id`` parameter. The servers are all provisioned with CoreOS beta (the ``operating_system`` parameter) and are customized with cloud-config user data passed to the ``user_data`` parameter.

The ``packet_device`` module has a ``wait_for_public_IPv`` that is used to specify the version of the IP address to wait for (valid values are ``4`` or ``6`` for IPv4 or IPv6). If specified, Ansible will wait until the GET API call for a device contains an Internet-routeable IP address of the specified version. When referring to an IP address of a created device in subsequent module calls, it is wise to use the ``wait_for_public_IPv`` parameter, or ``state: active`` in the packet_device module call.

Run the playbook:

.. code-block:: console

    $ ansible-playbook playbook_coreos.yml

Once the playbook quits, your new devices should be reachable through SSH. Try to connect to one and check if etcd has started properly:

.. code-block:: console

    tomk@work $ ssh -i id_rsa core@$one_of_the_servers_ip
    core@coreos-one ~ $ etcdctl cluster-health

If you have any questions or comments let us know! help@packet.net
