k8s-setup

Code for my post on Bare-Metal Kubernetes Setup, a setup of Bare Metal Kubernetes using Kubeadm and Metallb on Ubuntu 18.04 master and 3 Ubuntu 18.04 minions.

Setup Master

./setup-master.sh Network/Mask LB-Address-Range

This part does setup setup of:

• Initialize master.
• Setup pod network.
• Setup LoadBalancer.
• Setup LoadBalancer config.

Example

./setup-master.sh 192.168.122.0/24 192.168.122.150-192.168.122.250

Setup Nodes

Just join the nodes using the token generated in the previous master setup script.

Dashboard

./setup-dashboard.sh

This will setup the Kubernetes UI Dashboard and a service account k8s-admin.

To start the dashboard in the master.

kubectl proxy --accept-hosts='^*$'

The dashboard is accessible on the Master IP port 8001. You can bind your local environment to the master via SSH.

ssh -fNTL localhost:8000:127.0.0.1:8001 user@master-ip-address

Now you can access the dashboard on: http://localhost:8000/api/v1/namespaces/kubernetes-dashboard/services/https:kubernetes-dashboard:/proxy/#/overview?namespace=default

Storage

Longhorn - Option 1

To setup Longhorn

./setup-longhorn.sh

Longhorn setups up with a LB type service for accessing the dashboard. You should see it using

╭─user@z-server-1 ~/k8s-setup  ‹master*›
╰─➤  k get services -n longhorn-system
NAME                      TYPE           CLUSTER-IP     EXTERNAL-IP       PORT(S)        AGE
compatible-csi-attacher   ClusterIP      10.96.66.245   <none>            12345/TCP      3d15h
csi-attacher              ClusterIP      10.96.23.111   <none>            12345/TCP      3d15h
csi-provisioner           ClusterIP      10.96.6.171    <none>            12345/TCP      3d15h
longhorn-backend          ClusterIP      10.96.24.184   <none>            9500/TCP       3d15h
longhorn-frontend         LoadBalancer   10.96.191.83   192.168.122.150   80:31082/TCP   3d15h
╭─user@z-server-1 ~/k8s-setup  ‹master*›
╰─➤

StorageOS - Option 2

To setup StorageOS.

Install StorageOS operator

./setup-storage-os.sh

To access the Storage OS dashboard:

kubectl --namespace storageos port-forward svc/storageos 5705

To access the dashboard, bind your local machine to the master ip port 5705

ssh -fNTL localhost:5700:127.0.0.1:5705 user@MASTER-IP-ADDRESS

The access http://localhost:5700/

Nginx Ingress Controller

To setup Nginx Ingress Controller.

./setup-nginx-ingress-ctl.sh

Cert-Manager

To setup cert manager.

./setup-cert-manager.sh

Kube-Prometheus

If you need cluster monitoring out of the box try Kube-Promatheus