k8s部署安装-更新时间2020-10-5（docker）

部署前先进行环境优化centos系统优化脚本

！！！注意我的系统安装时没有创建swap交换分区，所以未写关闭交换分区的内容

#!/bin/bash
yum install -y yum-utils device-mapper-persistent-data lvm2
yum-config-manager --add-repo  https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
yum install -y docker-ce-19.03.9-3.el7 
mkdir -p /etc/docker
tee /etc/docker/daemon.json <<-'EOF'
{

  "registry-mirrors": [
      "https://fz5yth0r.mirror.aliyuncs.com",      
      "https://registry.docker-cn.com",      
      "http://hub-mirror.c.163.com/",      
      "https://docker.mirrors.ustc.edu.cn/"
],
  "graph": "/data/docker",

  "exec-opts": ["native.cgroupdriver=systemd"],

  "log-driver": "json-file",

  "log-opts": {

  "max-size": "100m"

  },

  "storage-driver": "overlay2"

}
EOF
systemctl daemon-reload

systemctl enable docker

systemctl restart docker
yum install -y ipvsadm ipset

cat > /etc/sysconfig/modules/ipvs.modules <<EOF  
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_

cat <<-'EOF' > /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/
enabled=1
gpgcheck=0
repo_gpgcheck=0
EOF
setenforce 0
yum -y install kubeadm-1.18.8-0 kubelet-1.18.8-0 kubectl-1.18.8-0

cat <<EOF >  /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward = 1
vm.swappiness = 0
EOF
sysctl --system
systemctl enable kubelet
# kubeadm init --kubernetes-version=v1.18.8 --pod-network-cidr=10.244.0.0/16 --service-cidr=10.96.0.0/12  --image-repository registry.aliyuncs.com/google_containers

初始化

kubeadm init --kubernetes-version=v1.18.8 --pod-network-cidr=10.244.0.0/16 --service-cidr=10.96.0.0/12  --image-repository registry.aliyuncs.com/google_containers

安装网络插件flannel #https://github.com/coreos/flannel

kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
#安装失败请更换镜像地址，在给hub.docker.com搜索googlecontainers/flannel

安装可视化工具（强烈不建议使用在外网环境）

kubectl apply -f "https://cloud.weave.works/k8s/scope.yaml?k8s-version=$(kubectl version | base64 | tr -d '\n')&k8s-service-type=NodePort"

kubectl 命令补全

 yum install -y bash-completion
source <(kubectl completion bash)
echo "source <(kubectl completion bash)" >> ~/.bashrc