CnetOS7 k8s docker叢集搭建
環境：
centos7系統（VMware中安裝的阿里雲映象）機器兩臺：
192.168.84.129: 用來安裝kubernetes master 192.168.84.128: 用作kubernetes minion （minion）一、 關閉系統執行的防火牆及selinux（兩臺機器都要）
1. 關閉系統執行的防火牆
# systemctl stop firewalld
# systemctl disable firewalld
2. 關閉selinux
# setenforce 0# sed -i '/^SELINUX=/cSELINUX=disabled' /etc/sysconfig/selinux
二、 master安裝配置
1. 安裝Kubernetes
# yum -y install etcd kubernetes
2. 配置etcd
# vi /etc/etcd/etcd.conf
ETCD_NAME=defaultETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_CLIENT_URLS="http://0.0.0.0:4001"
ETCD_ADVERTISE_CLIENT_URLS="http://localhost:4001"
3. 配置kubernetes
# vi /etc/kubernetes/apiserver
KUBE_API_ADDRESS="--address=0.0.0.0"
KUBE_API_PORT="--port=8080"
KUBELET_PORT="--kubelet_port=10250" ## 注意kubelet與port用“_”連線。後面的配置引數有同樣的問題（master，minion中都有）
KUBE_ETCD_SERVERS="--etcd_servers=http://127.0.0.1:4001"
KUBE_SERVICE_ADDRESSES="--service-cluster-ip-range=10.254.0.0/16"
KUBE_ADMISSION_CONTROL="--admission_control=NamespaceLifecycle,NamespaceExists,LimitRanger,SecurityContextDeny,ResourceQuota"
KUBE_API_ARGS=""
4. 配置flannel網路
# vi /etc/sysconfig/flanneld
FLANNEL_ETCD_ENDPOINTS="http://192.168.84.129:4001"
FLANNEL_ETCD_PREFIX="/atomic.io/network"
5. 啟動etcd，kube-apiserver, kube-controller-manager，kube-scheduler服務
# for SERVICES in etcd kube-apiserver kube-controller-manager kube-scheduler; do systemctl restart $SERVICES; systemctl enable $SERVICES ; systemctl status $SERVICES; done
6. 設定etcd網路
# etcdctl -C //192.168.84.129:4001 set /atomic.io/network/config '{"Network":"10.1.0.0/16"}'
7. 至此master配置完成，執行kubectl get nodes可以檢視有多少minion在執行，以及其狀態。這裡我們的minion還都沒有開始安裝配置，所以執行之後結果為空
# kubectl get nodes
三、minion安裝配置
1. 安裝Kubernetes
(1). 解除安裝已有的Docker# sudo yum -y remove docker-engine
# sudo rm -rf /var/lib/docker
# sudo yum -y remove docker docker-common container-selinux
# sudo yum -y remove docker-selinux
(2).
# yum -y install flannel kubernetes
2. 配置kubernetes連線的服務端IP
# vi /etc/kubernetes/config
KUBE_MASTER="--master=http://192.168.84.129:8080"
KUBE_ETCD_SERVERS="--etcd_servers=http://192.168.84.129:4001"
3. 配置kubernetes
# vi /etc/kubernetes/kubelet
KUBELET_ADDRESS="--address=0.0.0.0"KUBELET_PORT="--port=10250"
KUBELET_HOSTNAME="--hostname_override=192.168.84.128"
KUBELET_API_SERVER="--api_servers=http://192.168.84.129:8080"
# KUBELET_POD_INFRA_CONTAINER="--pod-infra-container-image=registry.access.redhat.com/rhel7/pod-infrastructure:latest"
4. 配置flannel網路
# vi /etc/sysconfig/flanneld
FLANNEL_ETCD_ENDPOINTS="http://192.168.84.129:4001"
FLANNEL_ETCD_PREFIX="/atomic.io/network"
5. 啟動服務
# for SERVICES in flanneld kube-proxy kubelet docker; do systemctl restart $SERVICES; systemctl enable $SERVICES; systemctl status $SERVICES; done
四、配置完成驗證安裝
切換到master機器上，檢視有多少minion在執行
# kubectl get nodes
NAME STATUS AGE
192.168.84.128 Ready 23s