June 2021
Intermediate to advanced
335 pages
5h 50m
Chinese
Content preview from Kubernetes编程
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自定义
API
服务器
｜
213
stopCh := genericapiserver.SetupSignalHandler()
options := server.NewCustomServerOptions(os.Stdout, os.Stderr)
cmd := server.NewCommandStartCustomServer(options, stopCh)
cmd.Flags().AddGoFlagSet(flag.CommandLine)
if err := cmd.Execute(); err != nil {
klog.Fatal(err)
}
}
尤其要注意对
SetupSignalHandler
的调用，它对接了
UNIX
信号处理。当收
到
SIGINT
（在终端按
Ctrl-C
会触发该信号）和
SIGKILL
信号时，终止程序的
Channel
对象会关闭。运行中的自定义
API
服务器持有该终止
Channel
对象，
Channel
停止时，
API
服务器也将关闭。因此，主循环会在接收到上述任何一
个信号后触发停止逻辑。在服务终止前所有请求都会被处理完（默认最多等
待
60
秒），从这个意义上说，这个停止动作是平滑的。它同时确保了所有请
求都会发送到审计后端，不会丢失审计日志。在此之后，
cmd.Execute()
将会
返回，进程也会终止。
8.4.2
第一次启动
至此，我们已经完成了第一次启动自定义
API
服务器所需要的所有准备工作。
假设你的集群配置存放在
~/.kube/config
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