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kubernetes视频教程笔记 (39)-高可用的K8S构建-kubeadm部署安装

乱世小白 2022-03-30 阅读 60


1. kube-proxy开启ipvs的前置条件

modprobe br_netfilter

cat > /etc/sysconfig/modules/ipvs.modules <<EOF
#!/bin/bash
modprobe -- ip_vs
modprobe -- ip_vs_rr
modprobe -- ip_vs_wrr
modprobe -- ip_vs_sh
modprobe -- nf_conntrack_ipv4
EOF
chmod 755 /etc/sysconfig/modules/ipvs.modules && bash /etc/sysconfig/modules/ipvs.modules && lsmod | grep -e ip_vs -e nf_conntrack_ipv4


2. 安装 Docker 软件

yum install -y yum-utils device-mapper-persistent-data lvm2

yum-config-manager \
--add-repo \
http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
yum update -y && yum install -y docker-ce

## 创建 /etc/docker 目录
mkdir /etc/docker

# 配置 daemon.
cat > /etc/docker/daemon.json <<EOF
{
"exec-opts": ["native.cgroupdriver=systemd"],
"log-driver": "json-file",
"log-opts": {
"max-size": "100m"
}
}
EOF
mkdir -p /etc/systemd/system/docker.service.d

# 重启docker服务
systemctl daemon-reload && systemctl restart docker && systemctl enable docker


3. 在主节点启动 Haproxy 与 Keepalived 容器

导入脚本 > 运行 > 查看可用节点

4. 安装 Kubeadm (主从配置)

cat <<EOF > /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=http://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=0
repo_gpgcheck=0
gpgkey=http://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg
http://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF

yum -y install kubeadm-1.15.1 kubectl-1.15.1 kubelet-1.15.1
systemctl enable kubelet.service

5. 初始化主节点

kubeadm config print init-defaults > kubeadm-config.yaml
kubeadm init --config=kubeadm-config.yaml --experimental-upload-certs | tee kubeadm-init.log


6. 加入主节点以及其余工作节点

执行安装日志中的加入命令即可

7. Etcd 集群状态查看

kubectl -n kube-system exec etcd-k8s-master01 -- etcdctl \
--endpoints=https://192.168.92.10:2379 \
--ca-file=/etc/kubernetes/pki/etcd/ca.crt \
--cert-file=/etc/kubernetes/pki/etcd/server.crt \
--key-file=/etc/kubernetes/pki/etcd/server.key cluster-health

kubectl get endpoints kube-controller-manager --namespace=kube-system -o yaml
kubectl get endpoints kube-scheduler --namespace=kube-system -o yaml

8. 部署网络

kubectl apply -f kube-flannel.yml



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