Installing kubernetes for a demo installation (on a single virtual machine)

How to set up your hosts.ini file

Assuming a single virtual machine with a public IP address running Ubuntu 18.04, with at least 5 CPU cores and at least 8 GB of memory.

Move to wire-server-deploy/ansible:

cd ansible/

Then:

Note

If you use ssh keys, and the user you login with is either root or can elevate to root without a password, you don’t need to do anything further to use ansible. If, however, you use password authentication for ssh access, and/or your login user needs a password to become root, see Manage ansible authentication settings.

Passwordless authentication

Presuming a fresh default Ubuntu 18.04 installation, the following steps will enable the Ansible playbook to run without specifying passwords.

This presumes you named your default Ubuntu user “wire”, and X.X.X.X is the IP or domain name of the target server Ansible will install Kubernetes on.

On the client (from wire-server-deploy/ansible), run:

ssh-keygen -f /root/.ssh/id_rsa -t rsa -P
ssh-copy-id wire@X.X.X.X
sed -i 's/# ansible_user = .../ansible_user = wire/g' inventory/demo/hosts.ini

And on the server (X.X.X.X), run:

echo 'wire ALL=(ALL) NOPASSWD:ALL' | sudo tee -a /etc/sudoers

Then on the client:

cp inventory/demo/hosts.example.ini inventory/demo/hosts.ini

Open hosts.ini and replace X.X.X.X with the IP address of your virtual machine that you use for ssh access. You can try using:

sed -i 's/X.X.X.X/1.2.3.4/g' inventory/demo/hosts.ini

Minio setup

In the inventory/demo/hosts.ini file, edit the minio variables in [minio:vars] (prefix, domain and deeplink_title) by replacing example.com with your own domain.

How to install kubernetes

From wire-server-deploy/ansible:

ansible-playbook -i inventory/demo/hosts.ini kubernetes.yml -vv

When the playbook finishes correctly (which can take up to 20 minutes), you should have a folder artifacts containing a file admin.conf. Copy this file:

mkdir -p ~/.kube
cp artifacts/admin.conf ~/.kube/config
KUBECONFIG=~/.kube/config

Make sure you can reach the server:

kubectl version

should give output similar to this:

Client Version: version.Info{Major:"1", Minor:"14", GitVersion:"v1.14.2", GitCommit:"66049e3b21efe110454d67df4fa62b08ea79a19b", GitTreeState:"clean", BuildDate:"2019-05-16T16:23:09Z", GoVersion:"go1.12.5", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"14", GitVersion:"v1.14.2", GitCommit:"66049e3b21efe110454d67df4fa62b08ea79a19b", GitTreeState:"clean", BuildDate:"2019-05-16T16:14:56Z", GoVersion:"go1.12.5", Compiler:"gc", Platform:"linux/amd64"}