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70ee39844e
* plugin/autopath: Add namespace selector and metrics Add a namespace, so autopathing only is performed in this namespace. This will make caching work for the cluster again. Also export metrics that we've done a successful autopath * dont shadow * Fix * Back the namespacing changes
52 lines
1.5 KiB
Markdown
52 lines
1.5 KiB
Markdown
# autopath
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*autopath* allows CoreDNS to perform server side search path completion.
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If it sees a query that matches the first element of the configured search path, *autopath* will
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follow the chain of search path elements and returns the first reply that is not NXDOMAIN. On any
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failures the original reply is returned. Because *autopath* returns a reply for a name that wasn't
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the original question it will add a CNAME that points from the original name (with the search path
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element in it) to the name of this answer.
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## Syntax
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~~~
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autopath [ZONE...] RESOLV-CONF
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~~~
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* **ZONES** zones *autopath* should be authoritative for.
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* **RESOLV-CONF** points to a `resolv.conf` like file or uses a special syntax to point to another
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plugin. For instance `@kubernetes`, will call out to the kubernetes plugin (for each
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query) to retrieve the search list it should use.
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Currently the following set of plugin has implemented *autopath*:
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* *kubernetes*
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* *erratic*
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## Metrics
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If monitoring is enabled (via the *prometheus* directive) then the following metric is exported:
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* `coredns_autopath_success_count_total{}` - counter of successfully autopath-ed queries.
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## Examples
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~~~
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autopath my-resolv.conf
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~~~
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Use `my-resolv.conf` as the file to get the search path from. This file only needs so have one line:
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`search domain1 domain2 ...`
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~~~
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autopath @kubernetes
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~~~
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Use the search path dynamically retrieved from the kubernetes plugin.
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## Bugs
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Replies from this plugin are not cached, as the *cache* plugin is configured after this one (see
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plugin.cfg).
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