185 lines
5.3 KiB
ReStructuredText
185 lines
5.3 KiB
ReStructuredText
Configuring the operating system
|
|
================================
|
|
|
|
This section describes the installation and configuration of operating
|
|
systems for the target hosts, as well as deploying SSH keys and
|
|
configuring storage.
|
|
|
|
Installing the operating system
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
Install one of the following supported operating systems on the
|
|
target host:
|
|
|
|
* Ubuntu server 18.04 (Bionic Beaver) LTS 64-bit
|
|
* Ubuntu server 20.04 (Focal Fossa) LTS 64-bit
|
|
* Debian 10 64-bit
|
|
* Centos 8 64-bit
|
|
|
|
Configure at least one network interface to access the Internet or
|
|
suitable local repositories.
|
|
|
|
We recommend adding the Secure Shell (SSH) server packages to the
|
|
installation on target hosts that do not have local (console) access.
|
|
|
|
.. note::
|
|
|
|
We also recommend setting your locale to `en_US.UTF-8`. Other locales might
|
|
work, but they are not tested or supported.
|
|
|
|
|
|
Configure Debian
|
|
~~~~~~~~~~~~~~~~
|
|
|
|
#. Update package source lists
|
|
|
|
.. code-block:: shell-session
|
|
|
|
# apt update
|
|
|
|
#. Upgrade the system packages and kernel:
|
|
|
|
.. code-block:: shell-session
|
|
|
|
# apt dist-upgrade
|
|
|
|
#. Install additional software packages:
|
|
|
|
.. code-block:: shell-session
|
|
|
|
# apt install bridge-utils debootstrap ifenslave ifenslave-2.6 \
|
|
lsof lvm2 openssh-server sudo tcpdump vlan python3
|
|
|
|
#. Reboot the host to activate the changes and use the new kernel.
|
|
|
|
|
|
Configure Ubuntu
|
|
~~~~~~~~~~~~~~~~
|
|
|
|
#. Update package source lists
|
|
|
|
.. code-block:: shell-session
|
|
|
|
# apt update
|
|
|
|
#. Upgrade the system packages and kernel:
|
|
|
|
.. code-block:: shell-session
|
|
|
|
# apt dist-upgrade
|
|
|
|
#. Install additional software packages:
|
|
|
|
.. code-block:: shell-session
|
|
|
|
# apt install bridge-utils debootstrap openssh-server \
|
|
tcpdump vlan python3
|
|
|
|
#. Install the kernel extra package if you have one for your kernel version \
|
|
|
|
.. code-block:: shell-session
|
|
|
|
# apt install linux-modules-extra-$(uname -r)
|
|
|
|
#. Reboot the host to activate the changes and use the new kernel.
|
|
|
|
|
|
Configure CentOS
|
|
~~~~~~~~~~~~~~~~
|
|
|
|
#. Upgrade the system packages and kernel:
|
|
|
|
.. code-block:: shell-session
|
|
|
|
# dnf upgrade
|
|
|
|
#. Disable SELinux. Edit ``/etc/sysconfig/selinux``, make sure that
|
|
``SELINUX=enforcing`` is changed to ``SELINUX=disabled``.
|
|
|
|
.. note::
|
|
|
|
SELinux enabled is not currently supported in OpenStack-Ansible
|
|
for CentOS/RHEL due to a lack of maintainers for the feature.
|
|
|
|
|
|
#. Install additional software packages:
|
|
|
|
.. code-block:: shell-session
|
|
|
|
# dnf install iputils lsof openssh-server\
|
|
sudo tcpdump python3
|
|
|
|
|
|
#. (Optional) Reduce the kernel log level by changing the printk
|
|
value in your sysctls:
|
|
|
|
.. code-block:: shell-session
|
|
|
|
# echo "kernel.printk='4 1 7 4'" >> /etc/sysctl.conf
|
|
|
|
|
|
#. Reboot the host to activate the changes and use the new kernel.
|
|
|
|
|
|
Configure SSH keys
|
|
==================
|
|
|
|
Ansible uses SSH to connect the deployment host and target hosts.
|
|
|
|
#. Copy the contents of the public key file on the deployment host to
|
|
the ``/root/.ssh/authorized_keys`` file on each target host.
|
|
|
|
#. Test public key authentication from the deployment host to each target
|
|
host by using SSH to connect to the target host from the deployment host.
|
|
If you can connect and get the shell without authenticating, it
|
|
is working. SSH provides a shell without asking for a
|
|
password.
|
|
|
|
For more information about how to generate an SSH key pair, as well as best
|
|
practices, see `GitHub's documentation about generating SSH keys`_.
|
|
|
|
.. _GitHub's documentation about generating SSH keys: https://help.github.com/articles/generating-ssh-keys/
|
|
|
|
.. important::
|
|
|
|
OpenStack-Ansible deployments require the presence of a
|
|
``/root/.ssh/id_rsa.pub`` file on the deployment host.
|
|
The contents of this file is inserted into an
|
|
``authorized_keys`` file for the containers, which is a
|
|
necessary step for the Ansible playbooks. You can
|
|
override this behavior by setting the
|
|
``lxc_container_ssh_key`` variable to the public key for
|
|
the container.
|
|
|
|
Configuring the storage
|
|
=======================
|
|
|
|
`Logical Volume Manager (LVM)`_ enables a single device to be split into
|
|
multiple logical volumes that appear as a physical storage device to the
|
|
operating system. The Block Storage (cinder) service, and LXC containers
|
|
that optionally run the OpenStack infrastructure,
|
|
can optionally use LVM for their data storage.
|
|
|
|
.. note::
|
|
|
|
OpenStack-Ansible automatically configures LVM on the nodes, and
|
|
overrides any existing LVM configuration. If you had a customized LVM
|
|
configuration, edit the generated configuration file as needed.
|
|
|
|
#. To use the optional Block Storage (cinder) service, create an LVM
|
|
volume group named ``cinder-volumes`` on the storage host. Specify a metadata
|
|
size of 2048 when creating the physical volume. For example:
|
|
|
|
.. code-block:: shell-session
|
|
|
|
# pvcreate --metadatasize 2048 physical_volume_device_path
|
|
# vgcreate cinder-volumes physical_volume_device_path
|
|
|
|
#. Optionally, create an LVM volume group named ``lxc`` for container file
|
|
systems and set ``lxc_container_backing_store: lvm`` in user_variables.yml
|
|
if you want to use LXC with LVM. If the ``lxc`` volume group does not
|
|
exist, containers are automatically installed on the file system under
|
|
``/var/lib/lxc`` by default.
|
|
|
|
.. _Logical Volume Manager (LVM): https://en.wikipedia.org/wiki/Logical_Volume_Manager_(Linux)
|