Kubernetes是Google開源的容器集群管理系統。它構建於docker技術之上，為容器化的應用提供資源調度、部署運行、服務發現、擴容縮容等整一套功能，本質上可看作是基於容器技術的mini-PaaS平台。本文旨在梳理Kubernetes的架構、概念及基本工作流，並且通過運行一個簡單的示例應用來介紹如何使用Kubernetes。
搭建環境
第一步，我們需要Kuberntes各組件的二進制可執行文件。有以下兩種方式獲取：
下載源代碼自己編譯：
git clone https://github.com/GoogleCloudPlatform/kubernetes.git cd kubernetes/build ./release.sh
直接下載人家已經編譯打包好的tar文件：
wget https://storage.googleapis.com/kubernetes/binaries.tar.gz
自己編譯源碼需要先安裝好golang，編譯完之后在kubernetes/_output/release-tars文件夾下可以得到打包文件。直接下載的方式不需要安裝其他軟件，但可能得不到最新的版本。
#192.168.124.131 kubernetes server
cp /usr/local/kubernetes/_output/release-stage/server/linux-amd64/kubernetes/server/bin/apiserver /usr/local/bin
cp /usr/local/kubernetes/_output/release-stage/server/linux-amd64/kubernetes/server/bin/controller-manager /usr/local/bin
cp /usr/local/kubernetes/_output/release-stage/server/linux-amd64/kubernetes/server/bin/scheduler /usr/local/bin
#192.168.124.132/192.168.124.133 kubernetes minion
cp /usr/local/kubernetes/_output/release-stage/server/linux-amd64/kubernetes/server/bin/kubelet /usr/local/bin
cp /usr/local/kubernetes/_output/release-stage/server/linux-amd64/kubernetes/server/bin/proxy /usr/local/bin
API Server Unit File
cd /lib/systemd/system
vim apiserver.service
[Unit] After=etcd.service ConditionFileIsExecutable=/usr/local/bin/apiserver Description=Kubernetes API Server Documentation=https://github.com/GoogleCloudPlatform/kubernetes Wants=etcd.service [Service] ExecStart=/usr/local/bin/apiserver \ -address=192.168.124.131 \ -port=8080 \ -portal_net=172.17.0.0/16 \ -etcd_servers=http://192.168.124.131:4001 \ -logtostderr=true \ -v=0 \ -log_dir=/home/kubernetes/logs Restart=always RestartSec=10 [Install] WantedBy=multi-user.target
controller-manager.service
vim controller-manager.service
[Unit] After=etcd.service ConditionFileIsExecutable=/usr/local/bin/controller-manager Description=Kubernetes Controller Manager Documentation=https://github.com/GoogleCloudPlatform/kubernetes Wants=etcd.service [Service]
ExecStart=/usr/local/bin/controller-manager \
-master=192.168.124.131:8080 \
-machines=192.168.124.132,192.168.124.133
-logtostderr=true \
-v=3 \
-log_dir=/home/kubernetes/logs
Restart=always
RestartSec=10
[Install]
WantedBy=multi-user.target
scheduler.service
vim scheduler.service
[Unit] After=etcd.service ConditionFileIsExecutable=/usr/local/bin/scheduler Description=Kubernetes Scheduler Documentation=https://github.com/GoogleCloudPlatform/kubernetes Wants=etcd.service [Service] ExecStart=/usr/local/bin/scheduler \ -master=192.168.124.131:8080 \ -logtostderr=false \ -v=3 \ -log_dir=/home/kubernetes/logs Restart=always RestartSec=10 [Install] WantedBy=multi-user.target
Minion unit file
cd /lib/systemd/system
vim kubelet.service
[Unit] After=etcd.service ConditionFileIsExecutable=/usr/local/bin/kubelet Description=Kubernetes Kubelet Documentation=https://github.com/GoogleCloudPlatform/kubernetes Wants=etcd.service [Service] ExecStart=/usr/local/bin/kubelet \ -address=192.168.124.132 \ -port=10250 \ -hostname_override=192.168.124.132 \ -etcd_servers=http://192.168.124.132:4001 \ -logtostderr=true \ -v=3 \ -log_dir=/home/kubernetes/logs Restart=always RestartSec=10 [Install] WantedBy=multi-user.target
proxy.service
vim proxy.service
[Unit] After=etcd.service ConditionFileIsExecutable=/usr/local/bin/proxy Description=Kubernetes Proxy Documentation=https://github.com/GoogleCloudPlatform/kubernetes Wants=etcd.service [Service] ExecStart=/usr/local/bin/proxy \ -etcd_servers=http://192.168.124.132:4001 \ -logtostderr=true \ -v=3 \ -log_dir=/home/kubernetes/logs Restart=always RestartSec=10 [Install] WantedBy=multi-user.target
部署完畢訪問
