All-In-One Single Machine¶
Things are about to get real! Using OpenStack in containers or VMs is nice for kicking the tires, but doesn’t compare to the feeling you get with hardware.
Prerequisites Linux & Network¶
You need to have a system with a fresh install of Linux. You can download the Minimal CD for Ubuntu releases since DevStack will download & install all the additional dependencies. The netinstall ISO is available for Fedora and CentOS/RHEL. You may be tempted to use a desktop distro on a laptop, it will probably work but you may need to tell Network Manager to keep its fingers off the interface(s) that OpenStack uses for bridging.
Determine the network configuration on the interface used to integrate your OpenStack cloud with your existing network. For example, if the IPs given out on your network by DHCP are 192.168.1.X - where X is between 100 and 200 you will be able to use IPs 201-254 for floating ips.
To make things easier later change your host to use a static IP instead of DHCP (i.e. 192.168.1.201).
Installation shake and bake¶
Add your user¶
We need to add a user to install DevStack. (if you created a user during install you can skip this step and just give the user sudo privileges below)
$ sudo useradd -s /bin/bash -d /opt/stack -m stack
Ensure home directory for the
stack user has executable permission for all,
as RHEL based distros create it with
700 and Ubuntu 21.04+ with
which can cause issues during deployment.
$ sudo chmod +x /opt/stack
Since this user will be making many changes to your system, it will need to have sudo privileges:
$ apt-get install sudo -y || yum install -y sudo $ echo "stack ALL=(ALL) NOPASSWD: ALL" | sudo tee /etc/sudoers.d/stack
On some systems you may need to use
From here on you should use the user you created. Logout and login as that user:
$ sudo su stack && cd ~
We’ll grab the latest version of DevStack via https:
$ sudo apt-get install git -y || sudo yum install -y git $ git clone https://opendev.org/openstack/devstack $ cd devstack
Now to configure
stack.sh. DevStack includes a sample in
local.conf as shown below to
do the following:
FLOATING_RANGEto a range not used on the local network, i.e. 192.168.1.224/27. This configures IP addresses ending in 225-254 to be used as floating IPs.
FIXED_RANGEto configure the internal address space used by the instances.
Set the administrative password. This password is used for the admin and demo accounts set up as OpenStack users.
Set the MySQL administrative password. The default here is a random hex string which is inconvenient if you need to look at the database directly for anything.
Set the RabbitMQ password.
Set the service password. This is used by the OpenStack services (Nova, Glance, etc) to authenticate with Keystone.
local.conf should look something like this:
[[local|localrc]] FLOATING_RANGE=192.168.1.224/27 FIXED_RANGE=10.11.12.0/24 ADMIN_PASSWORD=supersecret DATABASE_PASSWORD=iheartdatabases RABBIT_PASSWORD=flopsymopsy SERVICE_PASSWORD=iheartksl
There is a sample
under the samples directory in the devstack repository.
A seemingly endless stream of activity ensues. When complete you will
see a summary of
stack.sh’s work, including the relevant URLs,
accounts and passwords to poke at your shiny new OpenStack.
At this point you should be able to access the dashboard from other computers on the local network. In this example that would be http://192.168.1.201/ for the dashboard (aka Horizon). Launch VMs and if you give them floating IPs and security group access those VMs will be accessible from other machines on your network.