所有节点执行以下操作
- 修改节点名字和/etc/hosts文件：
$ hostname
master
$ cat /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.0.150 master.ssli.com master
192.168.0.151 node1.ssli.com node1
192.168.0.152 node2.ssli.com node2- 关闭防火墙、selinux和swap
$ systemctl stop firewalld && systemctl disable firewalld && setenforce 0
$ cat /etc/selinux/config | grep -v #
SELINUX=disabled
SELINUXTYPE=targeted
$ cat /etc/fstab | grep swap
# /dev/mapper/centos-swap swap swap defaults 0 0
$ swapoff -a- 使用阿里云的镜像源安装docker
$ yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
$ yum install docker-ce docker-ce-cli containerd.io -y
$ cat /etc/docker/daemon.json
{
"exec-opts": ["native.cgroupdriver=systemd"],
"registry-mirrors": [
"https://mirror.ccs.tencentyun.com"
]
}
$ systemctl enable docker && systemctl restart docker- 修改内核参数
$ cat <<EOF > /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
$ sysctl --system- 使用阿里云的yum源安装kubelet、kubeadm和kubectl
$ cat <<EOF > /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF
$ yum install -y kubelet kubeadm kubectl
$ systemctl enable kubeletmaster节点执行以下操作
- 使用阿里云源安装kubernetes：
$ kubeadm init --image-repository registry.aliyuncs.com/google_containers --kubernetes-version v1.23.1 --apiserver-advertise-address 192.168.0.150 --pod-network-cidr=10.244.0.0/16 --token-ttl 0
$ mkdir -p $HOME/.kube
$ cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
$ chown $(id -u):$(id -g) $HOME/.kube/config- 安装网络插件
$ k apply -f https://raw.githubusercontent.com/flannel-io/flannel/master/Documentation/kube-flannel.ymlnode节点执行以下操作
将节点加入集群，若忘记了该命令，在master节点执行kubeadm token create --print-join-command获取。
$ kubeadm join 192.168.0.150:6443 --token cdqcsf.4ukbz8iyia89i1rw --discovery-token-ca-cert-hash sha256:a848db8b509cbaa0c75d8fd5ab806bc09dd0293e3ed739a6cbad8b78dd863cc4集群搭建成功
代码语言：javascript复制$ k get no
NAME STATUS ROLES AGE VERSION
master Ready control-plane,master 92m v1.23.1
node1 Ready node 50m v1.23.1
node2 Ready node 14m v1.23.1
$k get ns
NAME STATUS AGE
default Active 92m
kube-node-lease Active 92m
kube-public Active 92m
kube-system Active 92m
$ k get po --all-namespaces
NAMESPACE NAME READY STATUS RESTARTS AGE
kube-system coredns-6d8c4cb4d-7jcd6 1/1 Running 0 92m
kube-system coredns-6d8c4cb4d-gfxtd 1/1 Running 0 92m
kube-system etcd-master 1/1 Running 0 92m
kube-system kube-apiserver-master 1/1 Running 0 92m
kube-system kube-controller-manager-master 1/1 Running 0 92m
kube-system kube-flannel-ds-99vdv 1/1 Running 0 3m55s
kube-system kube-flannel-ds-rzhkg 1/1 Running 0 3m55s
kube-system kube-flannel-ds-xmpsj 1/1 Running 0 3m54s
kube-system kube-proxy-k8spt 1/1 Running 0 92m
kube-system kube-proxy-kdbvh 1/1 Running 0 14m
kube-system kube-proxy-wfngx 1/1 Running 0 50m
kube-system kube-scheduler-master 1/1 Running 0 92m
$ k cluster-info
Kubernetes control plane is running at https://192.168.0.150:6443
CoreDNS is running at https://192.168.0.150:6443/api/v1/namespaces/kube-system/services/kube-dns:dns/proxy
To further debug and diagnose cluster problems, use 'kubectl cluster-info dump'.问题汇总
- 如果第一次执行kubeadm init或者kubeadm join失败，再次init或者join时，请先把已经存在的文件删除，否则无法再次init或者join
- kubelet可能启动失败，所以需要配置/etc/docker/daemon.json
- 镜像使用的image可以由于网络原因无法下载，请使用阿里云镜像源或者自行下载导入
参考资料
- https://phoenixnap.com/kb/how-to-install-kubernetes-on-centos
- https://blog.51cto.com/u_15127627/4037011
- https://segmentfault.com/a/1190000037682150
LEo at 00:12
