扩展CentOS上的Kubernetes(k8s)部署规模涉及多个步骤,以下是一个基本的指南:
在每个节点上进行以下操作:
yum install -y ntpdate ntp wget lsof telnet yum-utils
yum update
hostnamectl set-hostname k8s-master
hostnamectl set-hostname k8s-worker1
hostnamectl set-hostname k8s-worker2
/etc/hosts
文件,将主机名和IP地址映射添加进去。cat >> /etc/hosts << EOF
192.168.192.131 k8s-master
192.168.192.132 k8s-worker1
192.168.192.133 k8s-worker2
EOF
ntpdate -u ntp.aliyun.com
swapoff -ased -ri 's/.*swap.*/#&/' /etc/fstab
setenforce 0
sed -i 's/^SELINUX=enforcing$/SELINUX=disabled/' /etc/selinux/config
systemctl disable firewalld
systemctl status firewalld
/etc/sysctl.conf
文件,加载必要的流量控制内核模块:vm.swappiness=0
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward = 1
sysctl --system
在每个节点上进行以下操作:
yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
yum makecache fast
yum install -y docker-ce docker-ce-cli containerd.io
/etc/docker/daemon.json
文件:mkdir -p /etc/docker
tee /etc/docker/daemon.json <<-'EOF'
{"registry-mirrors": ["https://*********.mirror.aliyuncs.com"]}
EOF
systemctl daemon-reload
systemctl restart docker
从Kubernetes v1.24发行版起,dockershim
组件被移除,需要安装cri-dockerd
:
cri-dockerd
:wget https://github.com/Mirantis/cri-dockerd/releases/download/v0.3.4/cri-dockerd-0.3.4-3.el7.x86_64.rpm
rpm -ivh cri-dockerd-0.3.4-3.el7.x86_64.rpm
kubeadm join <master-ip>:<master-port> --token <token> --discovery-token-ca-cert-hash sha256:<hash>
etcdctl --name <node-name> --endpoints=<etcd-endpoints> --initial-cluster-token <token> --initial-cluster <cluster-name>/<node-name>,<node-ip>:<node-port> --initial-cluster-state=new
使用以下命令验证集群状态:
kubectl get nodes
通过以上步骤,你可以扩展CentOS上的Kubernetes集群规模。根据实际需求,可能还需要进行更多的配置和优化。
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