Deploy K3s and KubeSphere

K3s is a lightweight Kubernetes distribution built for IoT and edge computing with external dependencies minimized. It is packaged as a single binary that reduces the dependencies and steps that are required to set up a Kubernetes cluster.

You can use KubeKey to install both K3s and KubeSphere while KubeSphere can also be deployed on an existing K3s cluster.

Prerequisites

• For information about the prerequisites for K3s installation, see the K3s documentation.
• You may need to create necessary firewall rules or port forwarding rules depending on your environment. For more information, see Port Requirements.

Step 1: Download KubeKey

Follow the step below to download KubeKey.

curl -sfL https://get-kk.kubesphere.io | VERSION=v3.0.7 sh -

export KKZONE=cn

curl -sfL https://get-kk.kubesphere.io | VERSION=v3.0.7 sh -

Make kk executable:

chmod +x kk

Step 2: Create a Cluster

1. Create a configuration file of your cluster by running the following command:

   ./kk create config --with-kubernetes v1.21.4-k3s --with-kubesphere v3.3.2
   

   Note

   KubeKey supports the installation of K3s v1.21.4.

2. A default file config-sample.yaml will be created if you do not customize the name. Edit the file.

   vi config-sample.yaml
   

   ...
   metadata:
     name: sample
   spec:
     hosts:
     - {name: master, address: 192.168.0.2, internalAddress: 192.168.0.2, user: ubuntu, password: Testing123}
     - {name: node1, address: 192.168.0.3, internalAddress: 192.168.0.3, user: ubuntu, password: Testing123}
     - {name: node2, address: 192.168.0.4, internalAddress: 192.168.0.4, user: ubuntu, password: Testing123}
     roleGroups:
       etcd:
       - master
       control-plane:
       - master
       worker:
       - node1
       - node2
     controlPlaneEndpoint:
       domain: lb.kubesphere.local
       address: ""
       port: 6443
     kubernetes:
       version: v1.21.4-k3s
       imageRepo: kubesphere
       clusterName: cluster.local
     network:
       plugin: calico
       kubePodsCIDR: 10.233.64.0/18
       kubeServiceCIDR: 10.233.0.0/18
     registry:
       registryMirrors: []
       insecureRegistries: []
     addons: []
   ...
   

   Note

   For more information about each field in the configuration file, see an example file.

3. Save the file and execute the following command to install K3s and KubeSphere:

   ./kk create cluster -f config-sample.yaml
   

4. When the installation finishes, you can inspect installation logs with the following command:

   kubectl logs -n kubesphere-system $(kubectl get pod -n kubesphere-system -l 'app in (ks-install, ks-installer)' -o jsonpath='{.items[0].metadata.name}') -f
   

   Expected output:

   #####################################################
   ###              Welcome to KubeSphere!           ###
   #####################################################
   
   Console: http://192.168.0.2:30880
   Account: admin
   Password: P@88w0rd
   
   NOTES：
     1. After you log into the console, please check the
        monitoring status of service components in
        "Cluster Management". If any service is not
        ready, please wait patiently until all components
        are up and running.
     2. Please change the default password after login.
   
   #####################################################
   https://kubesphere.io             20xx-xx-xx xx:xx:xx
   #####################################################
   

5. Access the KubeSphere console at <NodeIP>:30880 with the default account and password (admin/P@88W0rd).

Thanks for the feedback. If you have a specific question about how to use KubeSphere, ask it on Slack. Open an issue in the GitHub repo if you want to report a problem or suggest an improvement.