mirror of
https://github.com/coredns/coredns.io.git
synced 2024-04-21 12:32:00 +00:00
42 lines
1.1 KiB
Markdown
42 lines
1.1 KiB
Markdown
+++
|
|
title = "startup"
|
|
description = "*startup* executes a command when the server begins."
|
|
weight = 10
|
|
tags = [ "middleware" , "startup" ]
|
|
categories = [ "middleware", "external" ]
|
|
date = "2017-07-22T12:37:19+01:00"
|
|
repo = "https://github.com/mholt/caddy"
|
|
home = "https://caddyserver.com/docs/startup"
|
|
+++
|
|
|
|
This is useful for preparing to serve a zone by running a script or starting a background process.
|
|
(Also see [shutdown](/exmiddleware/shutdown).)
|
|
|
|
Each command that is executed at startup is blocking, unless you suffix the command with a space and
|
|
`&`, which will cause the command to be run in the background. The output and error of the command go
|
|
to stdout and stderr, respectively. There is no stdin.
|
|
|
|
A command will only be executed once for each time it appears in the Corefile.
|
|
|
|
## Syntax
|
|
|
|
~~~
|
|
startup COMMAND
|
|
~~~
|
|
|
|
* **COMMAND** is the command to execute; it may be followed by arguments.
|
|
|
|
## Examples
|
|
|
|
Start command before the server starts listening:
|
|
|
|
~~~
|
|
startup /etc/init.d/command start
|
|
~~~
|
|
|
|
On windows, you might need to use quotes when the command path contains spaces:
|
|
|
|
~~~
|
|
startup "\"C:\Program Files\command.exe\" -b 127.0.0.1:9123" &
|
|
~~~
|