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plugin/forward: configurable domain support for healthcheck (#5281)

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* plugin/forward: configurable domain support for healthcheck

Signed-off-by: hansedong <admin@yinxiaoluo.com>
This commit is contained in:
hansedong
2022-04-13 00:39:48 +08:00
committed by GitHub
parent e60c179194
commit 0622a6c66c
7 changed files with 113 additions and 35 deletions
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16
plugin/forward/README.md
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@@ -50,7 +50,7 @@ forward FROM TO... {
tls CERT KEY CA
tls_servername NAME
policy random|round_robin|sequential
health_check DURATION [no_rec]
health_check DURATION [no_rec] [domain DOMAIN]
max_concurrent MAX
}
~~~
@@ -90,6 +90,8 @@ forward FROM TO... {
* `<duration>` - use a different duration for health checking, the default duration is 0.5s.
* `no_rec` - optional argument that sets the RecursionDesired-flag of the dns-query used in health checking to `false`.
The flag is default `true`.
* `domain DOMAIN` - optional arguments that sets the domain of the dns-query used in health checking.
If not configured, the requested domain name is `.`. `DOMAIN` is used to configure the domain name.
* `max_concurrent` **MAX** will limit the number of concurrent queries to **MAX**. Any new query that would
raise the number of concurrent queries above the **MAX** will result in a REFUSED response. This
response does not count as a health failure. When choosing a value for **MAX**, pick a number
@@ -182,6 +184,18 @@ service with health checks.
}
~~~
Or configure other domain name for health check requests
~~~ corefile
. {
forward . tls://9.9.9.9 {
tls_servername dns.quad9.net
health_check 5s domain example.org
}
cache 30
}
~~~
Or with multiple upstreams from the same provider
~~~ corefile