kubernetes环境搭建
2021-01-09 18:29
标签:discover EOS ini 拷贝 flannel table esc wal des 将 SELinux 设置为 permissive 模式(将其禁用) 关闭swap 如下: 使配置生效 安装基本服务 配置docker和安装docker 配置k8syum源 安装kubectl、kubelet、kubenetes-cni、kubeadm 设置开机启动 准备k8s 需要的docker 镜像(因为外网原因,不能下载镜像) 集群初始化(请记录初始化最后打印出的kubeadm join 信息)(IP根据实际情况修改) 使 master 节点参与工作负载 注意: 【子节点执行】子节点加入集群(IP根据实际情况修改) kubernetes环境搭建 标签:discover EOS ini 拷贝 flannel table esc wal des 原文地址:https://blog.51cto.com/14901322/2520824ip 主机名 角色 操作系统
192.168.157.130 master 主 centeos7.6+
192.168.157.131 ode1 节点 Centos7.6+
192.168.157.132 node2 节点 Centos7.6+
systemctl stop firewalld.service
systemctl stop iptables.service
systemctl disable firewalld.service
systemctl disable iptables.service
setenforce 0
sed -i ‘s/^SELINUX=enforcing$/SELINUX=disabled/‘ /etc/selinux/config
swapoff -a
# 永久关闭, 需要注释掉/dev开头的文字
vim /etc/fstab
UUID=ed95c595-4813-480e-992b-85b1347842e8 / ext4 defaults 1 1
# /dev/vgdata/lvdata /data ext4 defaults 0 0
3. 网桥配置
modprobe br_netfilter
cat /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
sysctl -p /etc/sysctl.d/k8s.conf
ls /proc/sys/net/bridge
4. 安装docker
yum install -y net-tools epel-release vim yum-utils device-mapper-persistent-data lvm2
yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
yum install -y docker-ce-18.06.0.ce
systemctl enable docker
systemctl start docker
cat /etc/docker/daemon.json
{
"insecure-registries":["0.0.0.0/0"],
"exec-opts": ["native.cgroupdriver=systemd"]
}
EOF
systemctl restart docker
5. 安装k8s相关
cat /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 kubectl-1.14.1 kubelet-1.14.1 kubernetes-cni-0.7.5 kubeadm-1.14.1
systemctl enable kubelet
cat > pullimages.sh
6. 主节点初始化
kubeadm init --kubernetes-version=v1.14.1 --pod-network-cidr=10.244.0.0/16 --apiserver-advertise-address=`ifconfig eth0 |awk ‘{print $2}‘|sed -n "2,1p"`
记录:
kubeadm join ${IP_ADDRESS}:6443 --token p2f3ud.l44djf21s0nj7a5y --discovery-token-ca-cert-hash sha256:866d6131855e1847bcec7481a184b42ea8616bbe95a9ffcf8dfcc64cdb38a905
# 复制配置
mkdir ~/.kube
cp -i /etc/kubernetes/admin.conf ~/.kube/config
chown $(id -u):$(id -g) ~/.kube/config
7. 主节点配置flannel网络
wget https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
kubectl apply -f kube-flannel.yml
kubectl describe node | grep Taint
kubectl taint nodes --all node-role.kubernetes.io/master-
8. 子节点加入集群
kubeadm join ${IP_ADDRESS}:6443 --token p2f3ud.l44djf21s0nj7a5y --discovery-token-ca-cert-hash sha256:866d6131855e1847bcec7481a184b42ea8616bbe95a9ffcf8dfcc64cdb38a905
# 确认日志无报错
# 复制配置
mkdir ~/.kube
拷贝主节点的 ~/.kube/config 到 ~/.kube(命令:scp -r ${IP_ADDRESS}:/root/.kube/config ~/.kube/)
chown $(id -u):$(id -g) ~/.kube/config
# 在主节点查询 Ready 说明节点加入集群正常
kubectl get nodes