mirror of
https://github.com/valitydev/salt.git
synced 2024-11-07 17:09:03 +00:00
181 lines
6.6 KiB
ReStructuredText
181 lines
6.6 KiB
ReStructuredText
===============================
|
|
Getting Started with OpenNebula
|
|
===============================
|
|
|
|
OpenNebula is an open-source solution for the comprehensive management of virtualized data centers to enable the mixed
|
|
use of private, public, and hybrid IaaS clouds.
|
|
|
|
|
|
Dependencies
|
|
============
|
|
The driver requires Python's ``lxml`` library to be installed. It also requires an OpenNebula installation running
|
|
version ``4.12`` or greater.
|
|
|
|
|
|
Configuration
|
|
=============
|
|
The following example illustrates some of the options that can be set. These parameters are discussed in more detail
|
|
below.
|
|
|
|
.. code-block:: yaml
|
|
|
|
# Note: This example is for /etc/salt/cloud.providers or any file in the
|
|
# /etc/salt/cloud.providers.d/ directory.
|
|
|
|
my-opennebula-provider:
|
|
# Set up the location of the salt master
|
|
#
|
|
minion:
|
|
master: saltmaster.example.com
|
|
|
|
# Define xml_rpc setting which Salt-Cloud uses to connect to the OpenNebula API. Required.
|
|
#
|
|
xml_rpc: http://localhost:2633/RPC2
|
|
|
|
# Define the OpenNebula access credentials. This can be the main "oneadmin" user that OpenNebula uses as the
|
|
# OpenNebula main admin, or it can be a user defined in the OpenNebula instance. Required.
|
|
#
|
|
user: oneadmin
|
|
password: JHGhgsayu32jsa
|
|
|
|
# Define the private key location that is used by OpenNebula to access new VMs. This setting is required if
|
|
# provisioning new VMs or accessing VMs previously created with the associated public key.
|
|
#
|
|
private_key: /path/to/private/key
|
|
|
|
driver: opennebula
|
|
|
|
|
|
Access Credentials
|
|
==================
|
|
The Salt Cloud driver for OpenNebula was written using OpenNebula's native XML RPC API. Every interaction with
|
|
OpenNebula's API requires a ``username`` and ``password`` to make the connection from the machine running Salt Cloud
|
|
to API running on the OpenNebula instance. Based on the access credentials passed in, OpenNebula filters the commands
|
|
that the user can perform or the information for which the user can query. For example, the images that a user can
|
|
view with a ``--list-images`` command are the images that the connected user and the connected user's groups can access.
|
|
|
|
|
|
Key Pairs
|
|
=========
|
|
Salt Cloud needs to be able to access a virtual machine in order to install the Salt Minion by using a public/private
|
|
key pair. The virtual machine will need to be seeded with the public key, which is laid down by the OpenNebula
|
|
template. Salt Cloud then uses the corresponding private key, provided by the ``private_key`` setting in the cloud
|
|
provider file, to SSH into the new virtual machine.
|
|
|
|
To seed the virtual machine with the public key, the public key must be added to the OpenNebula template. If using the
|
|
OpenNebula web interface, navigate to the template, then click ``Update``. Click the ``Context`` tab. Under the
|
|
``Network & SSH`` section, click ``Add SSH Contextualization`` and paste the public key in the ``Public Key`` box.
|
|
Don't forget to save your changes by clicking the green ``Update`` button.
|
|
|
|
.. note::
|
|
|
|
The key pair must not have a pass-phrase.
|
|
|
|
|
|
Cloud Profiles
|
|
==============
|
|
Set up an initial profile at either ``/etc/salt/cloud.profiles`` or the ``/etc/salt/cloud.profiles.d/`` directory.
|
|
|
|
.. code-block:: yaml
|
|
|
|
my-opennebula-profile:
|
|
provider: my-opennebula-provider
|
|
image: Ubuntu-14.04
|
|
|
|
The profile can now be realized with a salt command:
|
|
|
|
.. code-block:: bash
|
|
|
|
salt-cloud -p my-opennebula-profile my-new-vm
|
|
|
|
This will create a new instance named ``my-new-vm`` in OpenNebula. The minion that is installed on this instance will
|
|
have a minion id of ``my-new-vm``. If the command was executed on the salt-master, its Salt key will automatically be
|
|
signed on the master.
|
|
|
|
Once the instance has been created with salt-minion installed, connectivity to it can be verified with Salt:
|
|
|
|
.. code-block:: bash
|
|
|
|
salt my-new-vm test.ping
|
|
|
|
OpenNebula uses an image --> template --> virtual machine paradigm where the template draws on the image, or disk,
|
|
and virtual machines are created from templates. Because of this, there is no need to define a ``size`` in the cloud
|
|
profile. The size of the virtual machine is defined in the template.
|
|
|
|
|
|
.. _opennebula-required-settings:
|
|
|
|
Required Settings
|
|
=================
|
|
The following settings are always required for OpenNebula:
|
|
|
|
.. code-block:: yaml
|
|
|
|
my-opennebula-config:
|
|
xml_rpc: http://localhost:26633/RPC2
|
|
user: oneadmin
|
|
password: JHGhgsayu32jsa
|
|
driver: opennebula
|
|
|
|
|
|
Required Settings for VM Deployment
|
|
-----------------------------------
|
|
The settings defined in the :ref:`opennebula-required-settings` section are required for all interactions with
|
|
OpenNebula. However, when deploying a virtual machine via Salt Cloud, an additional setting, ``private_key``, is also
|
|
required:
|
|
|
|
.. code-block:: yaml
|
|
|
|
my-opennebula-config:
|
|
private_key: /path/to/private/key
|
|
|
|
|
|
Listing Images
|
|
==============
|
|
Images can be queried on OpenNebula by passing the ``--list-images`` argument to Salt Cloud:
|
|
|
|
.. code-block:: bash
|
|
|
|
salt-cloud --list-images opennebula
|
|
|
|
|
|
Listing Locations
|
|
=================
|
|
In OpenNebula, locations are defined as ``hosts``. Locations, or "hosts", can be querried on OpenNebula by passing the
|
|
``--list-locations`` argument to Salt Cloud:
|
|
|
|
.. code-block:: bash
|
|
|
|
salt-cloud --list-locations opennebula
|
|
|
|
Listing Sizes
|
|
=============
|
|
Sizes are defined by templates in OpenNebula. As such, the ``--list-sizes`` call returns an empty dictionary since
|
|
there are no sizes to return.
|
|
|
|
|
|
Additional OpenNebula API Functionality
|
|
=======================================
|
|
The Salt Cloud driver for OpenNebula was written using OpenNebula's native XML RPC API. As such, many ``--function``
|
|
and ``--action`` calls were added to the OpenNebula driver to enhance support for an OpenNebula infrastructure with
|
|
additional control from Salt Cloud. See the :py:mod:`OpenNebula function definitions <salt.cloud.clouds.opennebula>`
|
|
for more information.
|
|
|
|
|
|
Access via DNS entry instead of IP
|
|
==================================
|
|
Some OpenNebula installations do not assign IP addresses to new VMs, instead they establish the new VM's hostname based
|
|
on OpenNebula's name of the VM, and then allocate an IP out of DHCP with dynamic DNS attaching the hostname. This driver
|
|
supports this behavior by adding the entry `fqdn_base` to the driver configuration or the OpenNebula profile with a value
|
|
matching the base fully-qualified domain. For example:
|
|
|
|
.. code-block:: yaml
|
|
|
|
# Note: This example is for /etc/salt/cloud.providers or any file in the
|
|
# /etc/salt/cloud.providers.d/ directory.
|
|
|
|
my-opennebula-provider:
|
|
[...]
|
|
fqdn_base: corp.example.com
|
|
[...]
|