Kubernetes是Google开源的容器集群管理系统。它构建于docker技术之上，为容器化的应用提供资源调度、部署运行、服务发现、扩容缩容等整一套功能，本质上可看作是基于容器技术的mini-PaaS平台。本文旨在梳理Kubernetes的架构、概念及基本工作流，并且通过运行一个简单的示例应用来介绍如何使用Kubernetes。
搭建环境
第一步，我们需要Kuberntes各组件的二进制可执行文件。有以下两种方式获取：
下载源代码自己编译：
git clone https://github.com/GoogleCloudPlatform/kubernetes.git cd kubernetes/build ./release.sh
直接下载人家已经编译打包好的tar文件：
wget https://storage.googleapis.com/kubernetes/binaries.tar.gz
自己编译源码需要先安装好golang，编译完之后在kubernetes/_output/release-tars文件夹下可以得到打包文件。直接下载的方式不需要安装其他软件，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
部署完毕访问
