安装部署kubernetes之kubeadm(k8s)

#所有节点
curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
wget -O /etc/yum.repos.d/docker-ce.repo https://download.docker.com/Linux/centos/docker-ce.repo
sed -i 's+download.docker.com+mirrors.tuna.tsinghua.edu.cn/docker-ce+' /etc/yum.repos.d/docker-ce.repo
yum list docker-ce --showduplicates
​#安装指定版本的docker
yum install docker-ce-18.09.7 -y

#所有节点
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 install kubelet-1.15.5-0 kubeadm-1.15.5-0 kubectl-1.15.5-0 -y
systemctl enable kubelet && systemctl start kubelet

#所有节点
cat <<EOF >  /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-Iptables = 1
EOF

sysctl  --system

swapoff -a
vim /etc/fstab

#控制节点
kubeadm init --kubernetes-version=v1.15.0 --image-repository registry.aliyuncs.com/google_containers  --pod-network-cidr=10.244.0.0/16 --service-cidr=10.254.0.0/16

mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config

#node节点

kubeadm join 10.0.0.11:6443 --token 47hq6d.uvtn5ymfah6egl53 \
--discovery-token-ca-cert-hash sha256:ff283c3350b5dfa0ac8c093383416c535485ec18d5cdd6b82273e0d198157605

wget https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
#修改网段范围为
kubectl create -f kube-flannel.yml
kubectl get all -n kube-system
kubectl get nodes

kubeadm安装k8s 1.15部署dashboard
wget https://raw.githubusercontent.com/kubernetes/dashboard/v1.10.1/src/deploy/recommended/kubernetes-dashboard.yaml
​
vi kubernetes-dashboard.yaml
#修改service类型为NodePort类型
kubectl create -f kubernetes-dashboard.yaml
​
#解决Google浏览器不能打开kubernetes dashboard方法
mkdir key && cd key
#生成证书
openssl genrsa -out dashboard.key 2048
openssl req -new -out dashboard.csr -key dashboard.key -subj '/CN=10.0.0.11'
openssl x509 -req -in dashboard.csr -signkey dashboard.key -out dashboard.crt
#删除原有的证书secret
kubectl delete secret kubernetes-dashboard-certs -n kube-system
#创建新的证书secret
kubectl create secret generic kubernetes-dashboard-certs --from-file=dashboard.key --from-file=dashboard.crt -n kube-system
#查看pod
kubectl get pod -n kube-system
#删除pod，启动新pod生效
kubectl delete pod -n kube-sytem kubernetes-dashboard-7c697b776b-zph98
​
#编辑文件vim k8s-admin.yaml
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
name: admin
annotations:
rbac.authorization.kubernetes.io/autoupdate: "true"
roleRef:
kind: ClusterRole
name: cluster-admin
apiGroup: rbac.authorization.k8s.io
subjects:
- kind: ServiceAccount
name: admin
namespace: kube-system
​
---
apiVersion: v1
kind: ServiceAccount
metadata:
name: admin
namespace: kube-system
labels:
kubernetes.io/cluster-service: "true"
addonmanager.kubernetes.io/mode: Reconcile
​
​
kubectl create -f k8s-admin.yaml
kubectl get serviceaccount -n kube-system
kubectl describe serviceaccount admin -n kube-system
kubectl describe secret admin-token-29977 -n kube-system
​
#保存查看到的token密钥，就是登录dashboard需要的令牌