K3s是一个轻量的K8s，主要面向IOT、Edge、CI等场景。Lightweight Kubernetes. 5 less than k8s.K3s和K8s的对比，移除了：非默认的、遗留的特性Alpha阶段的特性In-tree的云服务提供商In-tree的存储驱动Docker (可选)带来了：简化安装SQLite3支持，替代etcdTLS管理自动的Manifest和Helm Chart管理containerd, CoreDNS, Flannel快速安装## 下载镜像，避免无网络或访问不了gcr.io$ wget https://github.com/rancher/k3s/releases/download/v0.3.0/k3s-airgap-images-amd64.tar$ sudo mkdir -p /var/lib/rancher/k3s/agent/images/$ sudo cp k3s-airgap-images-amd64.tar /var/lib/rancher/k3s/agent/images/## 安装$ curl -sfL https://get.k3s.io | sh -[INFO] Finding latest release[INFO] Using v0.3.0 as release[INFO] Downloading hash https://github.com/rancher/k3s/releases/download/v0.3.0/sha256sum-amd64.txt[INFO] Downloading binary https://github.com/rancher/k3s/releases/download/v0.3.0/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 uninstall script /usr/local/bin/k3s-uninstall.sh[INFO] systemd: Creating environment file /etc/systemd/system/k3s.service.env[INFO] systemd: Creating service file /etc/systemd/system/k3s.service[INFO] systemd: Enabling k3s unitCreated symlink /etc/systemd/system/multi-user.target.wants/k3s.service → /etc/systemd/system/k3s.service.[INFO] systemd: Starting k3s完成后就可以用kubectl正常访问k3s： $ kubectl get pods –all-namespaceskubectl get pods –all-namespacesNAMESPACE NAME READY STATUS RESTARTS AGEkube-system coredns-7748f7f6df-phxck 1/1 Running 33 38dkube-system helm-install-traefik-8tjss 0/1 Completed 0 51skube-system svclb-traefik-78cbd58b59-smdf8 2/2 Running 0 51skube-system traefik-5cc8776646-x9bw9 1/1 Running 0 34s$ kubectl get nodesNAME STATUS ROLES AGE VERSIONarchlinux Ready <none> 43m48s v1.13.5-k3s.1注意：K3s默认使用containerd，要使用docker需要设置–docker:curl -sfL https://get.k3s.io | INSTALL_K3S_EXEC="–docker" sh -更多的安装方式和配置可以参考文档。