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plugin/health: remove ability to poll other plugins (#2547)

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* plugin/health: remove ability to poll other plugins

This mechanism defeats the purpose any plugin (mostly) caching can still
be alive, we can probably forward queries still. Don't poll plugins,
just tell the world we're up and running.

It was only actually used in kubernetes; and there specifically would
mean any network hiccup would NACK the entire server health.

Fixes: #2534

Signed-off-by: Miek Gieben <miek@miek.nl>

* update docs based on feedback

Signed-off-by: Miek Gieben <miek@miek.nl>
This commit is contained in:
Miek Gieben
2019-03-07 22:13:47 +00:00
committed by GitHub
parent db0b16b615
commit c778b3a67c
10 changed files with 18 additions and 173 deletions
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6
plugin/kubernetes/README.md
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@@ -107,11 +107,6 @@ kubernetes [ZONES...] {
This allows the querying pod to continue searching for the service in the search path.
The search path could, for example, include another Kubernetes cluster.
## Health
This plugin implements dynamic health checking. Currently this is limited to reporting healthy when
the API has synced.
## Examples
Handle all queries in the `cluster.local` zone. Connect to Kubernetes in-cluster. Also handle all
@@ -144,7 +139,6 @@ kubernetes cluster.local {
}
~~~
## stubDomains and upstreamNameservers
Here we use the *forward* plugin to implement a stubDomain that forwards `example.local` to the nameserver `10.100.0.10:53`.