sharjeelaziz / ans-kube

Learning Ansible

Kubernetes Cluster on Raspberry PIs with Ansible

Update all.yml with your desired Kubernetes package version. You can get available package versions with the following command:

curl -s https://packages.cloud.google.com/apt/dists/kubernetes-xenial/main/binary-amd64/Packages | grep Version | awk '{print $2}'

Setup Cluster

1. Modify the inventory to suit your environment. Please refer to the setup/README.md for initial setup.

2. Verify that Ansible is running with ansible -m ping all

3. Setup the cluster with ansible-playbook cluster.yml

4. Configure the pi user to run kubectl on master

    mkdir -p $HOME/.kube
    sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
    sudo chown $(id -u):$(id -g) $HOME/.kube/config
   

Setup Dashboard

Screen is a console application that allows you to use multiple terminal sessions within one terminal window. We will run kubectl proxy in a screen session and use SSH port forwarding for tunneling the proxy port to our workstation.

1. Setup Kubernetes dashboard with ansible-playbook dashboard.yml
2. Install Screen on the master node with sudo apt-get install screen. Create a new screen session and run sudo kubectl proxy on the master node.
3. On your workstation open a terminal session with the command ssh -L 8001:127.0.01:8001 pi@<master node IP>
4. You should be able to connect to the dashboard from you workstation now by going to http://localhost:8001/api/v1/namespaces/kube-system/services/http:kubernetes-dashboard:/proxy

References:

rak8s (pronounced rackets - /ˈrækɪts/)