一、系統環境centos7系統機器二臺：
192.168.59.1: 用來安裝kubernetes master
192.168.59.2: 用作kubernetes minion （minion1）
1.如果系統開啓了防火牆則按如下步驟關閉防火牆（所有機器）
# systemctl stop firewalld
# systemctl disable firewalld
2.關閉selinux
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#setenforce 0
#sed -i '/^SELINUX=/cSELINUX=disabled' /etc/sysconfig/selinux
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二、MASTER安裝配置
1. 安裝並配置Kubernetes master(yum 方式)
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# yum -y install etcd kubernetes
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配置etcd。確保列出的這些項都配置正確並且沒有被註釋掉，下面的配置都是如此
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#vim /etc/etcd/etcd.conf
ETCD_NAME=default
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_CLIENT_URLS="http://0.0.0.0:2379"
ETCD_ADVERTISE_CLIENT_URLS="http://localhost:2379"
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配置kubernetes
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vim /etc/kubernetes/apiserver
KUBE_API_ADDRESS="--address=0.0.0.0"
KUBE_API_PORT="--port=8080"
KUBELET_PORT="--kubelet_port=10250"
KUBE_ETCD_SERVERS="--etcd_servers=http://127.0.0.1:2379"
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=""
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2. 啓動etcd, kube-apiserver, kube-controller-manager and kube-scheduler服務
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# for SERVICES in etcd kube-apiserver kube-controller-manager kube-scheduler; do
systemctl restart $SERVICES
systemctl enable $SERVICES
systemctl status $SERVICES
done
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3. 設置etcd網絡
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#etcdctl -endpoint="http://192.168.59.1:2379" set /coreos.com/network/config '{ "Network": "172.17.0.0/16", "Backend": {"Type": "vxlan"}}'
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查看狀態：
# kubectl get nodes
# kubectl get cs
三、MINION安裝配置(每臺minion機器都按如下安裝配置)
1. 環境安裝和配置
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# yum -y install flannel kubernetes
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配置kubernetes連接的服務端IP
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#vim /etc/kubernetes/config
KUBE_MASTER="--master=http://192.168.59.1:8080"
KUBE_ETCD_SERVERS="--etcd_servers=http://192.168.59.1:2379"
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配置kubernetes
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#vim /etc/kubernetes/kubelet
KUBELET_ADDRESS="--address=0.0.0.0"
KUBELET_PORT="--port=10250"
# change the hostname to this host’s IP address K
UBELET_HOSTNAME="--hostname_override=192.168.59.2"
KUBELET_API_SERVER="--api_servers=http://192.168.59.1:8080"
UBELET_POD_INFRA_CONTAINER="--pod-infra-container-image=registry.cn-hangzhou.aliyuncs.com/google-containers/pause-amd64:3.0"
KUBELET_ARGS=""
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2. 準備啓動服務（如果本來機器上已經運行過docker的請看過來，沒有運行過的請忽略此步驟）
運行ifconfig，查看機器的網絡配置情況（有docker0）
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# ifconfig docker0
Link encap:Ethernet HWaddr 02:42:B2:75:2E:67 inet addr:172.17.0.1 Bcast:0.0.0.0 Mask:255.255.0.0 UP
BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0
errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
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warning:在運行過docker的機器上可以看到有docker0，這裏在啓動服務之前需要刪掉docker0配置，在命令行運行:sudo ip link delete docker0
3.配置flannel網絡
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#vim /etc/sysconfig/flanneld
FLANNEL_ETCD_ENDPOINTS="http://192.168.59.1:2379"
FLANNEL_ETCD_PREFIX="/coreos.com/network"
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4. 啓動服務
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# for SERVICES in flanneld kube-proxy kubelet docker; do
systemctl restart $SERVICES
systemctl enable $SERVICES
systemctl status $SERVICES
done
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四、啓動一個測試示例
啓動一個Nginx副本示例：
# kubectl run nginx --image=nginx --replicas=3
pod正常運行後，創建Service：
# kubectl expose deployment nginx --port=88 --target-port=80 --type=NodePort
# kubectl get svc nginx
在Node節點訪問：
curl <CLUSTER-IP>:PORT
