centos7 用kubeadm安装 k8s v1.10.0

Posted 2020-11-17 windy-love

前提：centos能访问互联网， centos已经安装docker-ce

1、禁用防火墙

systemctl stop firewalld
systemctl disable firewalld

2、禁用SELINUX

setenforce 0
vi /etc/selinux/config

设置SELINUX=disabled

3、设置路由

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

4、下载国内镜像到本地，并tag为k8s内镜像

docker pull registry.cn-shenzhen.aliyuncs.com/cp_m/kube-apiserver-amd64:v1.10.0
docker pull registry.cn-shenzhen.aliyuncs.com/cp_m/kube-scheduler-amd64:v1.10.0
docker pull registry.cn-shenzhen.aliyuncs.com/cp_m/kube-controller-manager-amd64:v1.10.0
docker pull registry.cn-shenzhen.aliyuncs.com/cp_m/kube-proxy-amd64:v1.10.0
docker pull registry.cn-shenzhen.aliyuncs.com/cp_m/k8s-dns-kube-dns-amd64:1.14.8
docker pull registry.cn-shenzhen.aliyuncs.com/cp_m/k8s-dns-dnsmasq-nanny-amd64:1.14.8
docker pull registry.cn-shenzhen.aliyuncs.com/cp_m/k8s-dns-sidecar-amd64:1.14.8
docker pull registry.cn-shenzhen.aliyuncs.com/cp_m/etcd-amd64:3.1.12
docker pull registry.cn-shenzhen.aliyuncs.com/cp_m/flannel:v0.10.0-amd64
docker pull registry.cn-shenzhen.aliyuncs.com/cp_m/pause-amd64:3.1

 

docker tag registry.cn-shenzhen.aliyuncs.com/cp_m/kube-apiserver-amd64:v1.10.0 k8s.gcr.io/kube-apiserver-amd64:v1.10.0
docker tag registry.cn-shenzhen.aliyuncs.com/cp_m/kube-scheduler-amd64:v1.10.0 k8s.gcr.io/kube-scheduler-amd64:v1.10.0
docker tag registry.cn-shenzhen.aliyuncs.com/cp_m/kube-controller-manager-amd64:v1.10.0 k8s.gcr.io/kube-controller-manager-amd64:v1.10.0
docker tag registry.cn-shenzhen.aliyuncs.com/cp_m/kube-proxy-amd64:v1.10.0 k8s.gcr.io/kube-proxy-amd64:v1.10.0
docker tag registry.cn-shenzhen.aliyuncs.com/cp_m/k8s-dns-kube-dns-amd64:1.14.8 k8s.gcr.io/k8s-dns-kube-dns-amd64:1.14.8
docker tag registry.cn-shenzhen.aliyuncs.com/cp_m/k8s-dns-dnsmasq-nanny-amd64:1.14.8 k8s.gcr.io/k8s-dns-dnsmasq-nanny-amd64:1.14.8
docker tag registry.cn-shenzhen.aliyuncs.com/cp_m/k8s-dns-sidecar-amd64:1.14.8 k8s.gcr.io/k8s-dns-sidecar-amd64:1.14.8
docker tag registry.cn-shenzhen.aliyuncs.com/cp_m/etcd-amd64:3.1.12 k8s.gcr.io/etcd-amd64:3.1.12
docker tag registry.cn-shenzhen.aliyuncs.com/cp_m/flannel:v0.10.0-amd64 quay.io/coreos/flannel:v0.10.0-amd64
docker tag registry.cn-shenzhen.aliyuncs.com/cp_m/pause-amd64:3.1 k8s.gcr.io/pause-amd64:3.1

5、设置k8s的国内源

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

6、安装 kubelet、kubeadm、kubectl

yum makecache fast && yum install -y kubelet kubeadm kubectl

7、配置 kubelet

kubelet生成的配置文件将参数--cgroup-driver和docker的cgroup-driver必须一致

修改文件kubelet的配置文件/etc/systemd/system/kubelet.service.d/10-kubeadm.conf

将其中的KUBELET_CGROUP_ARGS参数更改成cgroupfs：

Environment="KUBELET_CGROUP_ARGS=--cgroup-driver=cgroupfs"

Kubernetes从1.8开始要求关闭系统的 Swap ，可以通过 kubelet 的启动参数--fail-swap-on=false更改这个限制，在上面的配置文件中增加一项配置：

Environment="KUBELET_EXTRA_ARGS=--fail-swap-on=false"

最后，重新加载配置并启动kubelet

systemctl daemon-reload

systemctl enable kubelet && systemctl start kubelet

8、用kubeadm初始化

注意：如果是flannel网络--pod-network-cidr=10.244.0.0/16， 如果是Calico网络--pod-network-cidr=192.168.0.0/16

kubeadm init --kubernetes-version=v1.10.0 --pod-network-cidr=10.244.0.0/16

等待一段时间，如果出现下面信息，则表示初始化成功：

Your Kubernetes master has initialized successfully!

To start using your cluster, you need to run the following as a regular user:

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

You should now deploy a pod network to the cluster.
Run "kubectl apply -f [podnetwork].yaml" with one of the options listed at:
  https://kubernetes.io/docs/concepts/cluster-administration/addons/

You can now join any number of machines by running the following on each node

 

如果想要master也可以调度pod，则运行下面命令：

kubectl taint nodes --all node-role.kubernetes.io/master-

9、设置权限

要使kubectl适用于非root用户，请运行以下命令：

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

或者，如果您是root用户，则可以运行：

export KUBECONFIG=/etc/kubernetes/admin.conf

10、安装flannel网络

kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/v0.10.0/Documentation/kube-flannel.yml

11、查看POD节点

kubectl get pods --all-namespaces

所有节点，状态都是Running，则表示安装成功

 

参考网址：https://www.cnblogs.com/cp-miao/p/8891200.html