Centos7 一步一步搭建K8S环境

前提条件

Centos7 安装
百度网盘链接：https://pan.baidu.com/s/1vERNTMEC37ZgKAEcYUgvKA 提取码：7cpp

基于NAT网络，配置IP

主机名	操作系统版本	docker version	kubelet version	flannel version
k8s_master	Centos 7	18.09.6	V1.14.2	V0.11.0
k8s_node01	Centos 7	18.09.6	V1.14.2	V0.11.0
k8s_node02	Centos 7	18.09.6	V1.14.2	V0.11.0

初始化

# yum update -y
# yum install -y pip curl git zsh wget
# sh -c "$(curl -fsSL https://raw.githubusercontent.com/robbyrussell/oh-my-zsh/master/tools/install.sh)"

安装docker

# yum install -y yum-utils   device-mapper-persistent-data   lvm2
# yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
# yum install -y docker-ce-18.09.6 docker-ce-cli-18.09.6 containerd.io
# mkdir -p /etc/docker
# tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": ["https://v16stybc.mirror.aliyuncs.com"],
  "exec-opts": ["native.cgroupdriver=systemd"]
}
EOF
# systemctl daemon-reload
# systemctl restart docker

K8S 安装准备

环境准备

# systemctl stop firewalld.service
# systemctl disable firewalld.service 
# swapoff -a
# sed -i.bak '/swap/s/^/#/' /etc/fstab
# sysctl net.bridge.bridge-nf-call-iptables=1
# sysctl net.bridge.bridge-nf-call-ip6tables=1
# cat <<EOF >  /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
# 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=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 clean all
# yum -y makecache
# yum install -y kubelet-1.14.2 kubeadm-1.14.2 kubectl-1.14.2
# systemctl enable kubelet && systemctl start kubelet

镜像准备

K8S相关镜像：https://pan.baidu.com/s/1dnZyL6AZda1CAJof341Jgg
提取码：i4qn

# docker load -i coredns_1.3.1.tar
# docker load -i etcd_3.3.10.tar
# docker load -i flannel_v0.11.0-amd64.tar
# docker load -i kube-apiserver_v1.14.2.tar
# docker load -i kube-controller-manager_v1.14.2.tar
# docker load -i kube-proxy_v1.14.2.tar
# docker load -i kubernetes-dashboard-amd64_1.10.0.tar
# docker load -i kube-scheduler_v1.14.2.tar
# docker load -i pause_3.1.tar

K8S master 安装

前提： 通过Vmware 完成克隆虚拟机 k8s-master

# cat >> /etc/hosts << EOF
192.168.137.100    k8s-master
192.168.137.101    k8s-node01
192.168.137.102    k8s-node02
EOF
# hostnamectl set-hostname k8s-master
# echo 'FORWARD_IPV4=YES' >> /etc/sysconfig/network
# echo "1" > /proc/sys/net/ipv4/ip_forward
# kubeadm init --apiserver-advertise-address 192.168.137.100 --pod-network-cidr=192.168.0.0/16
# mkdir -p $HOME/.kube
# cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
# chown $(id -u):$(id -g) $HOME/.kube/config
# kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml

K8S node01 安装

前提： 通过Vmware 完成克隆虚拟机 k8s-node01

# cat >> /etc/hosts << EOF
192.168.137.100    k8s-master
192.168.137.101    k8s-node01
192.168.137.102    k8s-node02
EOF
# hostnamectl set-hostname k8s-node01
# echo 'FORWARD_IPV4=YES' >> /etc/sysconfig/network
# echo "1" > /proc/sys/net/ipv4/ip_forward
# kubeadm join 192.168.137.100:6443 --token tiowt5.3duz1b0hwmxcz4tz \
    --discovery-token-ca-cert-hash sha256:9f1cc4746ede82e697a8fc4711feba9fcc3c4ecd323d14da220b1834cd7dfa89

K8S node02 安装

前提： 通过Vmware 完成克隆虚拟机 k8s-node02

# cat >> /etc/hosts << EOF
192.168.137.100    k8s-master
192.168.137.101    k8s-node01
192.168.137.102    k8s-node02
EOF
# hostnamectl set-hostname k8s-node02
# echo 'FORWARD_IPV4=YES' >> /etc/sysconfig/network
# echo "1" > /proc/sys/net/ipv4/ip_forward
# kubeadm join 192.168.137.100:6443 --token tiowt5.3duz1b0hwmxcz4tz \
    --discovery-token-ca-cert-hash sha256:9f1cc4746ede82e697a8fc4711feba9fcc3c4ecd323d14da220b1834cd7dfa89