In this official CNCF document, with some tips for you who will try to do the CKA exam, there's a table of the clusters you will be using during the exam. See the table below.
| Cluster | Members | CNI | Description |
|---|---|---|---|
| k8s | 1 etcd, 1 master, 2 worker | flannel | |
| hk8s | 1 etcd, 1 master, 2 worker | calico | |
| bk8s | 1 etcd, 1 master, 1 worker | flannel | |
| wk8s | 1 etcd, 1 master, 2 worker | flannel | |
| ek8s | 1 etcd, 1 master, 2 worker | flannel | |
| ik8s | 1 etcd, 1 master, 1 base node | loopback | Missing worker node |
This repo contains some scripts to get you started with cluster number one (k8s).
There's no real good structure no the scripts yet, sorry for the mess. You should start with create_cluster.sh though.
Enjoy!
- Heavily inspired by Kubernetes The Hard Way
- External etcd one node cluster (!)
- Runs on GCE (VMs)
- As of now only the first cluster can be created
- Lacks flannel support
- tmux and start/stop helper scripts are provided
- Scalable, not trivial but a good way of learning e.g. how to add more nodes to a cluster
Pre-req:
- Install gcloud
- Install kubectl
- Create a free tier account on GCE
- Configure gcloud
Create and run the cluster:
- Create a new directory somewhere on your local computer
- Clone this repo
cdinto the cloned repo directory- Run the
create_cluster.shscript
- Clean-up script
Provide initial tool setup (kubectl and cfssl)- Provide initial gcloud setup, installation and configuration
- Creation of GCE free tier
create-cluster.shCheck if kubelet, gcloud and cfssl binaries are present- Add colors to the echoes
- Refactor (ouch!)
- Add argument to script to create different kinds of cluster (the others from the CKA exam)
- Add a check to see if the provisioned instances are running before proceeding after creation
- Add a way of continuing after this step, bootstrapping etc.
- Support flannel and calico overlays (if possible in GCE)
bootstrap*.sh- Add echoes with color
- Find a way to execute them remotely
- The rest of the
*.shscripts