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plugins: set upstream unconditionally (#2956)

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`upstream` is not needed as a setting; just set if unconditionally and
remove all documentation and tests for it.

At some point we want remove the hanlding for `upstream` as well and
error out on seeing it.

Signed-off-by: Miek Gieben <miek@miek.nl>
This commit is contained in:
Miek Gieben
2019-07-02 16:23:47 +01:00
committed by GitHub
parent 3a0c7c6153
commit 22c6e3e179
22 changed files with 28 additions and 114 deletions
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4
plugin/secondary/README.md
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@@ -23,16 +23,12 @@ A working syntax would be:
secondary [zones...] {
transfer from ADDRESS
transfer to ADDRESS
upstream
}
~~~
* `transfer from` specifies from which address to fetch the zone. It can be specified multiple times;
if one does not work, another will be tried.
* `transfer to` can be enabled to allow this secondary zone to be transferred again.
* `upstream` resolve external names found (think CNAMEs) pointing to external names. This is only
really useful when CoreDNS is configured as a proxy; for normal authoritative serving you don't
need *or* want to use this. CoreDNS will resolve CNAMEs against itself.
When a zone is due to be refreshed (Refresh timer fires) a random jitter of 5 seconds is
applied, before fetching. In the case of retry this will be 2 seconds. If there are any errors