K8S集群安裝部署

 

參考地址：https://www.cnblogs.com/xkops/p/6169034.html

1. 確保系統已經安裝epel-release源

# yum -y install epel-release

2. 關閉防火牆服務和selinx，避免與docker容器的防火牆規則沖突

# systemctl stop firewalld
# systemctl disable firewalld
# setenforce 0

3. 安裝配置Kubernetes Master

3.1 使用yum安裝etcd和kubernetes-master

# yum -y install etcd kubernetes-master

node：在安裝etcd之前確保 /etc/hosts 下的配置正確。

3.2 編輯 /etc/etcd/etcd.conf 文件

ETCD_NAME=default # 默認名稱 ETCD_DATA_DIR="/var/lib/etcd/default.etcd" # 默認etcd數據目錄 ETCD_LISTEN_CLIENT_URLS="http://0.0.0.0:2379" # 主要0.0.0.0為監聽的網卡地址，不要亂改 ETCD_ADVERTISE_CLIENT_URLS="http://localhost:2379" # 連接的etc地址，本文是單機版的etcd，不用改變 

3.3 編輯 /etc/kubernetes/apiserver 文件

KUBE_API_ADDRESS="--insecure-bind-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=""

3.4 啟動 etcd, kube-apiserver, kube-controller-manager, kube-scheduler 等服務，並設置開機啟動。

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

注意：如果服務啟動失敗請運行 cat /usr/lib/systemd/system/$SERVICES 命令注意如下字段的信息提示：

[Service] WorkingDirectory=/var/lib/kubelet EnvironmentFile=-/etc/kubernetes/config EnvironmentFile=-/etc/kubernetes/kubelet ExecStart=/usr/bin/kubelet \ $KUBE_LOGTOSTDERR \ $KUBE_LOG_LEVEL \ $KUBELET_API_SERVER \ $KUBELET_ADDRESS \ $KUBELET_PORT \ $KUBELET_HOSTNAME \ $KUBE_ALLOW_PRIV \ $KUBELET_POD_INFRA_CONTAINER \ $KUBELET_ARGS Restart=on-failure 

對比各個參數配置，查找問題。

3.5 在etcd中定義flannel網絡

# etcdctl mk /atomic.io/network/config '{"Network":"172.17.0.0/16"}' 

4. 安裝配置Kubernetes Node

4.1 使用yum安裝flannel和kubernetes-node

# yum -y install flannel kubernetes-node

4.2 為flannel網絡指定etcd服務，修改 /etc/sysconfig/flanneld 文件

FLANNEL_ETCD="http://master:2379" # master地址
FLANNEL_ETCD_KEY="/atomic.io/network"

4.3 修改 /etc/kubernetes/config 文件

KUBE_LOGTOSTDERR="--logtostderr=true"
KUBE_LOG_LEVEL="--v=0"
KUBE_ALLOW_PRIV="--allow-privileged=false"
KUBE_MASTER="--master=http://master:8080"# master地址

4.4 按照如下內容修改對應node的配置文件/etc/kubernetes/kubelet

KUBELET_ADDRESS="--address=0.0.0.0"
KUBELET_PORT="--port=10250"
KUBELET_HOSTNAME="--hostname-override=node" #修改成對應Node的IP
KUBELET_API_SERVER="--api-servers=http://master:8080" #指定Master節點的API Server
KUBELET_POD_INFRA_CONTAINER="--pod-infra-container-image=registry.access.redhat.com/rhel7/pod-infrastructure:latest"
KUBELET_ARGS=""

4.5 在所有Node節點上啟動 kube-proxy,kubelet,docker,flanneld 等服務，並設置開機啟動。

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

5. 驗證集群是否安裝成功

在master上執行如下命令:

# kubectl get node