k8s 集群及各个组件部署

所有节点都需要做hosts解析
vim /etc/hosts
10.0.0.11  k8s-master
10.0.0.12  k8s-node-1
10.0.0.13  k8s-node-2

master节点安装etcd

#master节点安装etcd
yum -y install etcd
vim /etc/etcd/etcd.conf 
6行：ETCD_LISTEN_CLIENT_URLS="http://0.0.0.0:2379"
21行：ETCD_ADVERTISE_CLIENT_URLS="http://10.0.0.11:2379"
#开启服务
systemctl start etcd.service
systemctl enable etcd.service

etcdctl -C http://10.0.0.11:2379 cluster-health
etcd原生支持做集群

master节点安装kubernetes

#master节点安装kubernetes
yum install kubernetes-master.x86_64 -y
vim /etc/kubernetes/apiserver 
8行:  KUBE_API_ADDRESS="--insecure-bind-address=0.0.0.0"
11行：KUBE_API_PORT="--port=8080"
14行: KUBELET_PORT="--kubelet-port=10250"
17行：KUBE_ETCD_SERVERS="--etcd-servers=http://10.0.0.11:2379"
23行：KUBE_ADMISSION_CONTROL="--admission-control=NamespaceLifecycle,NamespaceExists,LimitRanger,SecurityContextDeny,ResourceQuota"
vim /etc/kubernetes/config
22行：KUBE_MASTER="--master=http://10.0.0.11:8080"
#开启服务
systemctl enable kube-apiserver.service
systemctl restart kube-apiserver.service
systemctl enable kube-controller-manager.service
systemctl restart kube-controller-manager.service
systemctl enable kube-scheduler.service
systemctl restart kube-scheduler.service
#检测服务
[root@k8s-master ~]# kubectl get componentstatus 
NAME                 STATUS    MESSAGE             ERROR
scheduler            Healthy   ok                  
controller-manager   Healthy   ok                  
etcd-0               Healthy   {"health":"true"} 

node节点安装kubernetes

node节点安装kubernetes
#node-1:
yum install kubernetes-node.x86_64 -y
22行：KUBE_MASTER="--master=http://10.0.0.11:8080"
vim /etc/kubernetes/kubelet
KUBELET_ADDRESS="--address=0.0.0.0"
KUBELET_PORT="--port=10250"
KUBELET_HOSTNAME="--hostname-override=k8s-node-1"
KUBELET_API_SERVER="--api-servers=http://10.0.0.11:8080"
systemctl enable kubelet.service
systemctl restart kubelet.service
systemctl enable kube-proxy.service
systemctl restart kube-proxy.service
#node-2:
yum install kubernetes-node.x86_64 -y
vim /etc/kubernetes/kubelet 
KUBELET_ADDRESS="--address=0.0.0.0"
KUBELET_PORT="--port=10250"
KUBELET_HOSTNAME="--hostname-override=k8s-node-2"
KUBELET_API_SERVER="--api-servers=http://10.0.0.11:8080"
systemctl enable kubelet.service
systemctl restart kubelet.service
systemctl enable kube-proxy.service
systemctl restart kube-proxy.service

#在master节点检查
[root@k8s-master ~]# kubectl get nodes
NAME        STATUS    AGE
10.0.0.12   Ready     6m
10.0.0.13   Ready     3s

所有节点配置flannel网络

#所有节点配置flannel网络
yum install flannel -y
sed -i 's#http://127.0.0.1:2379#http://10.0.0.11:2379#g' /etc/sysconfig/flanneld
#master节点：
etcdctl mk /atomic.io/network/config '{"Network":"172.18.0.0/16","Backend": {"Type": "vxlan"}}'

systemctl enable flanneld.service 
systemctl restart flanneld.service 

#node节点：
systemctl enable flanneld.service 
systemctl restart flanneld.service 
systemctl  restart  docker
vim /usr/lib/systemd/system/docker.service
##在[Service]区域下增加一行
ExecStartPost=/usr/sbin/iptables -P FORWARD ACCEPT

systemctl daemon-reload 
systemctl restart docker

配置master为镜像仓库

#所有节点
vi /etc/docker/daemon.json
{
"registry-mirrors": ["https://registry.docker-cn.com"],
"insecure-registries": ["10.0.0.11:5000"]
}
systemctl restart docker

#master节点
yum install docker -y
wget http://192.168.18.251/file/registry.tar.gz
docker load -i registry.tar.gz 
docker run -d -p 5000:5000 --restart=always --name registry -v /opt/myregistry:/var/lib/registry  registry