Linux:搭建K3s集群
Prepare VMs by Multipass
multipass find
multipass launch -c 1 -m 1G -d 5G -n k3s-master 20.04
multipass launch -c 1 -m 2G -d 10G -n k3s-node01 20.04
multipass launch -c 1 -m 2G -d 10G -n k3s-node02 20.04
multipass list
multipass info k3s-node01
Install K3s
install master
multipass exec k3s-master -- bash -c "curl -sfL https://get.k3s.io | sh -"
# instead use shell:
# multipass shell k3s-master
ubuntu@k3s-master:~$ curl -sfL https://get.k3s.io | sh - [INFO] Finding release for channel stable [INFO] Using v1.21.4+k3s1 as release [INFO] Downloading hash https://github.com/k3s-io/k3s/releases/download/v1.21.4+k3s1/sha256sum-amd64.txt [INFO] Downloading binary https://github.com/k3s-io/k3s/releases/download/v1.21.4+k3s1/k3s [INFO] Verifying binary download [INFO] Installing k3s to /usr/local/bin/k3s [INFO] Creating /usr/local/bin/kubectl symlink to k3s [INFO] Creating /usr/local/bin/crictl symlink to k3s [INFO] Creating /usr/local/bin/ctr symlink to k3s [INFO] Creating killall script /usr/local/bin/k3s-killall.sh [INFO] Creating uninstall script /usr/local/bin/k3s-uninstall.sh [INFO] env: Creating environment file /etc/systemd/system/k3s.service.env [INFO] systemd: Creating service file /etc/systemd/system/k3s.service [INFO] systemd: Enabling k3s unit Created symlink /etc/systemd/system/multi-user.target.wants/k3s.service → /etc/systemd/system/k3s.service. [INFO] systemd: Starting k3s
a token is stored in master:
sudo cat /var/lib/rancher/k3s/server/node-token
K1022c02ad526cfd3d77039346d85e68a07849d907d99c1aef2108e63b60806c963::server:2f9f1afcb5e64d7150dab2b519598bc1
TOKEN=$(multipass exec k3s-master sudo cat /var/lib/rancher/k3s/server/node-token)
IP=$(multipass info k3s-master | grep IPv4 | awk '{print $2}')
install agents
multipass exec k3s-node01 -- bash -c "curl -sfL https://get.k3s.io | K3S_URL=\"https://$IP:6443\" K3S_TOKEN=\"$TOKEN\" sh -"
multipass exec k3s-node02 -- bash -c "curl -sfL https://get.k3s.io | K3S_URL=\"https://$IP:6443\" K3S_TOKEN=\"$TOKEN\" sh -"
use k8s cluster
__workspace__ multipass exec k3s-master -- bash ubuntu@k3s-master:~$ sudo kubectl get nodes NAME STATUS ROLES AGE VERSION k3s-node01 Ready <none> 14m v1.21.4+k3s1 k3s-master Ready control-plane,master 29m v1.21.4+k3s1 k3s-node02 Ready <none> 90s v1.21.4+k3s1
access from host
multipass mount tmp k3s-master
multipass mount tmp k3s-master:/home/tmp
Notice: Need to set privacy settings
Then copy /etc/rancher/k3s/k3s.yaml, and save to ~/.kube/config, replace ip address to the master node ip.
kubectl get pods --all-namespaces
install dashboard
see: https://docs.rancher.cn/docs/k3s/installation/kube-dashboard/_index
to access, use kubectl in host and proxy.