问题

我确定我看到过一些用Go编写的开源服务器，它能够重新启动并保持连接开放。

我找不到它来学习这个技术。

我知道apache.httpd有apachectl graceful，它可以重新启动并保持连接开放。

一般情况下和在Go中是如何实现的呢？

我认为它必须进行fork，1个退出，2个执行（新的Go应用程序）并通过Fd链接连接。

但是在Go中，我只能找到ForkExec函数。我认为Fork是必需的。
此外，syscall包的文档不是很完善。

英文:

I am sure I saw some open source server written in Go that was able to restart and keep connections open.

I can't find it to learn that technique.

I know apache.httpd has apachectl graceful that restarts and keeps connections open.

How does it done in general and in Go?

I thought it must fork and 1 exit, 2 exec(new go app) and link connections by Fd.

But in Go I can find only ForkExec function. I think Fork is required.
Also syscall package is not very well documented.

答案1

得分: 7

CloseOnExec可能有所帮助，

[FileListener，CloseOnExec和优雅地重启服务器][1]

[Go中TCP服务器的零停机升级][2]

[1]: https://groups.google.com/forum/?fromgroups=#!topic/golang-nuts/B98plzvQQN8 "FileListener，CloseOnExec和优雅地重启服务器"
[2]: http://blog.nella.org/?p=879 "Go中TCP服务器的零停机升级"

英文:

CloseOnExec may help,

[FileListener, CloseOnExec and gracefully restarting servers][1]

[Zero Downtime upgrades of TCP servers in Go][2]

[1]: https://groups.google.com/forum/?fromgroups=#!topic/golang-nuts/B98plzvQQN8 "FileListener, CloseOnExec and gracefully restarting servers"
[2]: http://blog.nella.org/?p=879 "Zero Downtime upgrades of TCP servers in Go"

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