空闲几分钟后，kubectl命令断开连接 [英] kubectl command disconnects after few minutes of idle time

问题描述

我们注意到，当我们exec -it连接到Pod时，在一定的空闲时间之后，连接被破坏了.有什么办法可以让连接保持更长的打开时间?

We noticed when we exec -it to connect into a pod, after certain idle time the connection get destroyed. Is there any option to leave the connection open longer?

我看到有一个打开的 PR ，但是想知道是否有该问题的任何解决方法.

I see there is an open PR, but wondering if there is any workaround for this issue.

推荐答案

简短的回答是否".这就是为什么:

The short answer is no. And that's why:

启用TCP keepalive用于控制台连接

TCP keepalive是一个TCP选项，可以使数据包之间进行交换 即使没有流量也可以连接.它应该是 在连接的两端都启用.必须启用TCP keepalive 在操作系统级别由应用程序/程序和 打开TCP连接.

TCP keepalive is a TCP option that causes packets to be exchanged over a connection even if there is no traffic to transport. It should be enabled on both ends of the connection. TCP keepalive must be enabled at the operating-system level and by the application/program opening TCP connections.

在Linux上，编辑"/etc/sysctl.conf"文件并添加以下行:

On Linux, edit the "/etc/sysctl.conf" file and add these lines:

net.ipv4.tcp_keepalive_time = 200
net.ipv4.tcp_keepalive_probes = 9
net.ipv4.tcp_keepalive_intvl = 50

(随意调整您认为合适的值).完成编辑后，您 必须使内核知道新值:

(feel free to adapt the values as you see fit). When done editing, you must make the new values known to the kernel:

# sysctl --load=/etc/sysctl.conf

自定义TCP套接字保持活动超时的配置

这些属性的默认值为:

Default values for these properties is:

tcp_keepalive_time = 7200 seconds
tcp_keepalive_probes = 9
tcp_keepalive_intvl = 75 seconds

另一种可能的方法是在客户端启动某种代理服务器，并通过它连接到Kubernetes apiserver. 我没有亲自测试过，可能会比较棘手，但是

The other possible way is to start some kind of proxy server on the client side and connect to Kubernetes apiserver through it. I haven’t tested it myself and it could be tricky, but here is an example of how to enable keepalives to backend for Nginx.

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