1.關閉防火牆
systemctl stop firewalld && systemctl disable firewalld
2.禁用selinux
setenforce 0
3.確認selinux是否修改爲disabled
vi /etc/selinux/config
4.創建/etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward = 1
5.使命令4生效
modprobe br_netfilter
sysctl -p /etc/sysctl.d/k8s.conf
6.安裝docker的yum源
yum install -y yum-utils device-mapper-persistent-data lvm2
yum-config-manager \
--add-repo \
https://download.docker.com/linux/centos/docker-ce.repo
7.安裝docker,設置開機自啓
yum makecache fast
yum install -y --setopt=obsoletes=0 \
docker-ce-18.06.1.ce-3.el7
systemctl start docker
systemctl enable docker
8.安裝的kubelet、kubectl、kubeadm源
阿里雲:
cat <<EOF > /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/
gpgcheck=0
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
enabled=1
EOF
9.安裝kubelet、kubectl、kubeadm
yum makecache fast
yum install -y kubernetes-cni-0.6.0-0.x86_64 kubelet-1.12.3 kubeadm-1.12.3 kubectl-1.12.3 //安裝指定版本
10.關閉swap
swapoff -a
11.修改文件/etc/sysctl.d/k8s.conf添加vm.swappiness=0
12.kubelet開機啓動
systemctl enable kubelet
systemctl start kubelet
13.拉取鏡像
此時僅僅源爲阿里雲時需要拉鏡像
docker pull mirrorgooglecontainers/kube-apiserver-amd64:v1.12.3
docker pull mirrorgooglecontainers/kube-controller-manager-amd64:v1.12.3
docker pull mirrorgooglecontainers/kube-scheduler-amd64:v1.12.3
docker pull mirrorgooglecontainers/kube-proxy-amd64:v1.12.3
docker pull mirrorgooglecontainers/pause-amd64:3.1
docker pull mirrorgooglecontainers/etcd-amd64:3.2.24
docker pull kuberneter/coredns:1.2.2
docker pull mirrorgooglecontainers/kubernetes-dashboard-amd64:v1.10.0
docker tag mirrorgooglecontainers/kube-apiserver-amd64:v1.12.3 k8s.gcr.io/kube-apiserver:v1.12.3
docker tag mirrorgooglecontainers/kube-controller-manager-amd64:v1.12.3 k8s.gcr.io/kube-controller-manager:v1.12.3
docker tag mirrorgooglecontainers/kube-scheduler-amd64:v1.12.3 k8s.gcr.io/kube-scheduler:v1.12.3
docker tag mirrorgooglecontainers/kube-proxy-amd64:v1.12.3 k8s.gcr.io/kube-proxy:v1.12.3
docker tag mirrorgooglecontainers/pause-amd64:3.1 k8s.gcr.io/pause:3.1
docker tag mirrorgooglecontainers/etcd-amd64:3.2.24 k8s.gcr.io/etcd:3.2.24
docker tag kuberneter/coredns:1.2.2 k8s.gcr.io/coredns:1.2.2
docker tag mirrorgooglecontainers/kubernetes-dashboard-amd64:v1.10.0 k8s.gcr.io/dashboard:v1.10.0
docker rmi mirrorgooglecontainers/kube-apiserver-amd64:v1.12.3
docker rmi mirrorgooglecontainers/kube-controller-manager-amd64:v1.12.3
docker rmi mirrorgooglecontainers/kube-scheduler-amd64:v1.12.3
docker rmi mirrorgooglecontainers/kube-proxy-amd64:v1.12.3
docker rmi mirrorgooglecontainers/pause-amd64:3.1
docker rmi mirrorgooglecontainers/etcd-amd64:3.2.24
docker rmi kuberneter/coredns:1.2.2
docker rmi mirrorgooglecontainers/kubernetes-dashboard-amd64:v1.10.0
14.初始化集羣
kubeadm init --kubernetes-version=1.12.3 --pod-network-cidr=10.244.0.0/16 --apiserver-advertise-address=140.143.0.194
15.部署集羣失敗
kubeadm reset
ifconfig cni0 down
ip link delete cni0
ifconfig flannel.1 down
ip link delete flannel.1
rm -rf /var/lib/cni/
16.初始化顯示成功
a.當前爲root用戶
echo "export KUBECONFIG=/etc/kubernetes/admin.conf" >> ~/.bash_profile
source ~/.bash_profile
b.當前爲普通用戶
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config