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Installing a OpenShift test environment using Minishift

Many companies decide to user RedHat OpenShift to manage their Kubernetes platform to simplify operations and use a straightforward UI instead of the commandline.

Furthermore, OpenShift has many security features built-in.

Supporting Kubernetes and OpenShift customers the same way, we needed a development and testing platform for OpenShift as well and discovered Minishift as a easy and sufficient solution.

In that article we share our installation steps using Ubuntu 18.10 and the caveats we ran into.

What is OpenShift?

Red Hat® OpenShift® is a hybrid cloud, enterprise Kubernetes application platform.

What is Minishift?

Minishift is a tool that helps you run OpenShift locally by running a single-node OpenShift cluster inside a VM. You can try out OpenShift or develop with it, day-to-day, on your local host.

Preparation

There are preparation steps you should be aware of before installing Minishift. These steps mainly focus on setting up the hypervisor that should be used to run the virtual machine for Minishift.

As we're using Ubuntu 18.10 the KVM hypervisor is our choice and the following installation steps are based on it.

If your running macOS or Windows, please check the installation steps for these operating systems here:

macOS

Windows

All Platforms

KVM

If you run a different linux than Ubuntu 18.10 or higher, you can check the following url for alternative installations:

Setting Up Virtualization Environment Minishift

Install libvirt and qemu-kvm on your system:

sudo apt install qemu-kvm libvirt-daemon libvirt-daemon-system sudo usermod -a -G libvirt $(whoami) # add yourself to the libvirt group newgrp libvirt # apply group change to current session

Install the KVM driver binary and make it executable as follows:

sudo curl -L https://github.com/dhiltgen/docker-machine-kvm/releases/download/v0.10.0/docker-machine-driver-kvm-ubuntu16.04 -o /usr/local/bin/docker-machine-driver-kvm # install docker-machine-driver KVMsudo chmod +x /usr/local/bin/docker-machine-driver-kvm

Check libvirtd service

systemctl is-active libvirtd sudo systemctl start libvirtd # if the service is not active

libvirt networking

Next step is checking the libvirt networking and if all is up and running.

Check the network status

sudo virsh net-list --all sudo virsh net-start default # start the service if not running sudo virsh net-autostart default # mark the service as autostart

Minishift installation

Download Minishift software for your operating system from the Minishift Releases page, extract and copy the executable into your path.

cd /tmp wget https://github.com/minishift/minishift/releases/download/v1.34.0/minishift-1.34.0-linux-amd64.tgz tar xzf minishift-1.34.0-linux-amd64.tgz sudo cp minishift-1.34.0-linux-amd64/minishift /usr/local/bin sudo chmod +x /usr/local/bin/minishift

Minishift initial start

The first start of Minishift is downloading OpenShift binary from Github and the Minishift Centos Iso to your local system and sets up all networking, storage and everything else you need to run OpenShift.

To get started simply run minishift start

OpenShift Minishift start

Minishift installation done

Developer login into Minishift

After the installation is done, you'll get all the login details in your commandline, the URL to access OpenShift and the information to login as a developer.

You can simply click the link or open it in a browser, use developer as a username and anything except an empty password as a password.

OpenShift developer login

Admin login into Minishift

Now the first issues started, as you need to run oc login -u system:admin

First issue: Can't find the oc command

Solution: run eval $(minishift oc-env)

Great, the oc command works now, but the admin login still fails (be aware that sometimes the link redirects to localhost and you need to manually change it to the Minishift ip again).

Second issue: no admin login possible

Solution

minishift addon apply admin-user oc login -u admin # type in a password to use

OpenShift Admin login

Installation of a Minishift addon

There are some community addons you can use to simplify the Minishift installation. One example is Prometheus.

The process to get the addons is very easy:

git clone https://github.com/minishift/minishift-addons.git # clone the addon repository minishift addons install minishift-addons/add-ons/prometheus # point to the addon path you want to install

Deploy Prometheus addon

minishift addons apply prometheus --addon-env namespace=kube-system

Minishift Prometheus addon

That's it - you have a running minishift environment now and you can start playing around or developing extensions or deploying your applications on OpenShift.