k3s是一个轻量化k8s环境，适合用来做测试，这两天换工作，服务器还没准备好，先用笔记本虚机搭一个k8s环境用用
环境
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| VMwareWorkstation 17Pro
8G6C 20G硬盘
Centos7.9.2009
k3s版本1.20.6
192.168.8.128 k3s-server
192.168.8.129 k3s-agent
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初始化
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systemctl disable firewalld --now
sed -i 's/^SELINUX=.*/SELINUX=disabled/g' /etc/selinux/config
swapoff -a
sed -i '$ s/^/#/' /etc/fstab
modprobe br_netfilter
echo "modprobe br_netfilter" >> /etc/profile
echo "
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward = 1
" >> /etc/sysctl.d/k8s.conf
sysctl -p /etc/sysctl.d/k8s.conf
cp -a /etc/yum.repos.d /etc/yum.repos.d.backup
rm -f /etc/yum.repos.d/*
curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
yum install -y yum-utils device-mapper-persistent-data lvm2 wget net-tools nfs-utils lrzsz gcc gcc-c++ make cmake libxml2-devel openssl-devel curl curl-devel unzip sudo ntp libaio-devel wget vim ncurses-devel autoconf automake zlib-devel python-devel epel-release openssh-server socat ipvsadm conntrack ntpdate telnet ipvsadm
yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
yum install containerd -y
systemctl start containerd
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master节点安装容器运行时与k3s
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curl -sfL https://rancher-mirror.rancher.cn/k3s/k3s-install.sh | INSTALL_K3S_MIRROR=cn sh -s - --system-default-registry=registry.cn-hangzhou.aliyuncs.com
kubectl get nodes
NAME STATUS ROLES AGE VERSION
k3s-server Ready control-plane,master 6m35s v1.30.6+k3s1
kubectl get pods -n kube-system
NAME READY STATUS RESTARTS AGE
coredns-d8b4bcd69-97vv6 1/1 Running 0 6m28s
helm-install-traefik-crd-nmcsr 0/1 Completed 0 6m28s
helm-install-traefik-jzqc9 0/1 Completed 1 6m28s
local-path-provisioner-745c986c66-xh7rx 1/1 Running 0 6m28s
metrics-server-7b58468669-wxkm5 1/1 Running 0 6m28s
svclb-traefik-dd4520d2-4s5td 2/2 Running 0 5m41s
traefik-9d7dc4c5c-pg68c 1/1 Running 0 5m42s
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node节点加入k8s集群
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cat /var/lib/rancher/k3s/server/node-token
K1083819675b00439b84a3199cfd591ac86ad4e2d09ef2efc5c0d85ea39d76a1f6c::server:e185ea240f6f3999dbad5a3f32f22420
curl -sfL https://get.k3s.io | K3S_URL=https://192.168.8.128:6443 K3S_TOKEN=K1083819675b00439b84a3199cfd591ac86ad4e2d09ef2efc5c0d85ea39d76a1f6c::server:e185ea240f6f3999dbad5a3f32f22420 sh -
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kubeconfig相关
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| k3s默认的kubeconfig在/etc/rancher/k3s/k3s.yaml，给他复制过去即可
cp /etc/rancher/k3s/k3s.yaml /root/.kube/config
然后kubectl get nodes就可以正常使用了
后面要对接到rancher或者lens都可以用这个
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