在CentOS上安装Kubernetes(K8s)时,可能会遇到各种问题。以下是一些常见问题的解决方法:
关闭防火墙和SELinux:
systemctl stop firewalld && systemctl disable firewalld
sudo setenforce 0
sudo sed -i 's/^SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config
配置Docker:
sudo yum install -y yum-utils
sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repos
sudo yum install -y docker-ce docker-ce-cli containerd.io
sudo systemctl enable docker
sudo systemctl start docker
配置K8s源:
cat <<EOF | sudo tee /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-\$basearch
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://packages.cloud.google.com/yum/doc/yum-key.gpg
EOF
安装K8s组件:
sudo yum install -y kubelet kubeadm kubectl
sudo systemctl enable --now kubelet
初始化K8s集群:
sudo kubeadm init --image-repository=registry.aliyuncs.com/google_containers --pod-network-cidr=10.244.0.0/16
常见问题的排查:
节点无法加入集群:
kubectl get nodes
确认节点状态是否为Ready。sudo journalctl -f -u kubelet
网络插件问题:
kubectl apply -f https://docs.projectcalico.org/manifests/calico.yaml
内核参数问题:
cat > /etc/sysctl.d/k8s.conf <<EOF
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward = 1
EOF
sudo sysctl -p
如果以上步骤仍无法解决问题,可以参考具体的错误日志,进一步排查问题。希望这些信息对你有所帮助。