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Setting up your resources on Openstack

Note: There are at least a few different ways to deploy Kubernetes on Openstack. kubeadm is another option that was not looked into much during this research as well as cluster api. For this deployment, kubespray, terraform and ansible were used.

Configure a master node

Kubespray has the concept of a ‘bastion’ node and will provision and configure one if you define it. However, a node on which to launch Kubespray in the first place, is still required. To boot up a Fedora 29 VM in your cloud tenant as the Kubespray master node, Choose the Instances category under Compute on the openstack project dashboard, then select Launch Instance. It is necessary to fill out a few categories:

Details: Instance name and description can be anything you like
Source:
  - Select Boot Source: Image
  - Select Fedora-Cloud-Base-[VERSION] or whatever is more recent
Flavor: This example has been tested with `c2-15gb-31` and `c4-30gb-186`
Network: If a network with your project name already exists, select it,
otherwise leave this blank.
Key Pair: Create a Key Pair

This Fedora instance will be configured to function as a de-facto bastion node, but is not a bastion node as defined by Kubespray, nor a k8s master node. Assign a floating IP by selecting the Floating IPs category under Network on the openstack project dashboard. Click on Associate and under the Port to be associated select your instance. Now it is possible to log in with SSH agent forwarding.

eval `ssh-agent`
ssh-add  ~/.ssh/<private-key>.pem
ssh -A fedora@123.456.78.900

Where 123.456.78.900 is an IP that has been associated with your network.

Install and Update System Packages

sudo dnf install git ansible-2.6.5 python3-jinja2 python3-netaddr python3-pbr wget unzip
sudo dnf update --exclude=ansible
sudo reboot # apply kernel update

Install Terraform

mkdir ~/bin/
wget https://releases.hashicorp.com/terraform/0.11.11/terraform_0.11.11_linux_amd64.zip -O /tmp/tf.zip
sha256sum /tmp/tf.zip  | grep 94504f4a67bad612b5c8e3a4b7ce6ca2772b3c1559630dfd71e9c519e3d6149c
unzip /tmp/tf.zip -d bin/

Set up Kubespray from git

The kubespray directory will be placed in the home directory. Note that subsequent steps rely on invoking commands in this location.