centos7搭建docker+k8s集成

1. 关闭防火墙

# systemctl stop firewalld
# systemctl disable firewalld
# setenforce 0

2. 使用yum安装etcd和kubernetes-master

# yum -y install etcd kubernetes

3. 修改 /etc/etcd/etcd.conf 文件

# grep -Env '#|^$' /etc/etcd/etcd.conf
3:ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
6:ETCD_LISTEN_CLIENT_URLS="http://192.168.3.4:2379,http://127.0.0.1:2379"
9:ETCD_NAME="default"
21:ETCD_ADVERTISE_CLIENT_URLS="http://192.168.3.4:2379"

4. 修改 /etc/kubernetes/apiserver 文件 

# grep -Env '#|^$' /etc/kubernetes/apiserver
8:KUBE_API_ADDRESS="--insecure-bind-address=0.0.0.0"
11:KUBE_API_PORT="--port=8080"
14:KUBELET_PORT="--kubelet-port=10250"
17:KUBE_ETCD_SERVERS="--etcd-servers=http://192.168.3.4:2379"
20:KUBE_SERVICE_ADDRESSES="--service-cluster-ip-range=10.254.0.0/16"
23:KUBE_ADMISSION_CONTROL="--admission-control=NamespaceLifecycle,NamespaceExists,LimitRanger,SecurityContextDeny,ResourceQuota"
26:KUBE_API_ARGS=""

5. 启动etcd、kube-apiserver、kube-controller-manager、kube-scheduler等服务，并设置开机启动

 # for SERVICES in etcd kube-apiserver kube-controller-manager kube-scheduler; do systemctl restart $SERVICES;systemctl enable $SERVICES; done

6. 在etcd中定义flannel网络

# etcdctl mk /atomic.io/network/config '{"Network":"192.168.3.4/16"}'

7. 安装配置Kubernetes Node

　　7.1 使用yum安装flannel和kubernetes-node

# yum -y install flannel

　　7.2 为flannel网络指定etcd服务，修改/etc/sysconfig/flanneld文件

# grep -Env '#|^$' /etc/sysconfig/flanneld
5:FLANNEL_ETCD_ENDPOINTS="http://192.168.3.4:2379"
9:FLANNEL_ETCD_PREFIX="/atomic.io/network"

　　7.3 修改/etc/kubernetes/config文件

# grep -Env '#|^$' /etc/kubernetes/config
13:KUBE_LOGTOSTDERR="--logtostderr=true"
16:KUBE_LOG_LEVEL="--v=0"
19:KUBE_ALLOW_PRIV="--allow-privileged=false"
22:KUBE_MASTER="--master=http://192.168.3.4:8080"

　　7.4 按照如下内容修改对应node的配置文件/etc/kubernetes/kubelet 

# grep -Env '#|^$' /etc/kubernetes/kubelet
5:KUBELET_ADDRESS="--address=0.0.0.0"
8:KUBELET_PORT="--port=10250"
11:KUBELET_HOSTNAME="--hostname-override=192.168.3.4"
14:KUBELET_API_SERVER="--api-servers=http://192.168.3.4:8080"
17:KUBELET_POD_INFRA_CONTAINER="--pod-infra-container-image=registry.access.redhat.com/rhel7/pod-infrastructure:latest"
20:KUBELET_ARGS=""

　　7.5  在所有Node节点上启动kube-proxy,kubelet,docker,flanneld等服务，并设置开机启动。

# for SERVICES in kube-proxy kubelet flanneld;do systemctl restart $SERVICES;systemctl enable $SERVICES; done

8. 验证集群是否安装成功

# kubectl get node
NAME            STATUS     AGE
127.0.0.1       NotReady   6h
192.168.3.4     NotReady   6h