在CentOS上部署Kubernetes(k8s)集群时,有几个关键点需要注意,以确保集群的稳定性和安全性。以下是一些主要的注意事项:
systemctl stop firewalld
systemctl disable firewalld
sed -i 's/enforcing/disabled/' /etc/selinux/config
setenforce 0
swapoff --all
sed -i 's/.*swap.*/#&/' /etc/fstab
yum remove docker docker-client docker-client-latest docker-common docker-latest docker-latest-logrotate docker-logrotate docker-engine
yum install -y yum-utils device-mapper-persistent-data lvm2
yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
yum install docker-ce docker-ce-cli containerd.io
systemctl start docker
systemctl enable docker
cat <<EOF > /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64/
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://packages.cloud.google.com/yum/doc/yum-key.gpg https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
EOF
yum install -y kubelet kubeadm kubectl
systemctl enable kubelet
systemctl start kubelet
kubeadm init --apiserver-advertise-address <master-ip> --image-repository registry.aliyuncs.com/google_containers --kubernetes-version <version> --service-cidr <service-cidr> --pod-network-cidr <pod-network-cidr>
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
kubectl apply -f https://docs.projectcalico.org/manifests/calico.yaml
kubectl get nodes
kubectl get pods --all-namespaces
通过以上步骤和注意事项,可以在CentOS上成功部署Kubernetes集群。如果在安装过程中遇到问题,可以参考官方文档或相关社区资源进行排查和解决。