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plugin/azure: allow startup with unavailable zones (#8524)

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Signed-off-by: houyuwushang <liuluoqianqiu@outlook.com>
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houyuwushang
2026-09-11 11:54:12 +08:00
committed by GitHub
parent 52b85e4c45
commit b51e6d254b
4 changed files with 570 additions and 62 deletions
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plugin/azure/README.md
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@@ -10,6 +10,19 @@ The azure plugin is useful for serving zones from Microsoft Azure DNS. The *azur
all the DNS records supported by Azure, viz. A, AAAA, CNAME, MX, NS, PTR, SOA, SRV, and TXT
record types. NS record type is not supported by azure private DNS.
Zone data is loaded asynchronously after startup and refreshed every minute.
An unavailable zone or zone-listing error is logged without preventing CoreDNS from
starting or other configured zones from being updated. Each zone listing,
including retries and pagination, has a one-minute timeout.
Configuration and credential initialization errors still prevent startup.
Until a zone has been successfully loaded, queries for it return SERVFAIL unless
`fallthrough` is explicitly configured. Only complete, successful updates replace
the in-memory zone. Failed updates, including a deleted Azure zone returning an
error, retain the last successfully loaded data and are retried. Remove the zone
from the Corefile to stop serving this retained data. Snapshots are not persisted
across restarts or configuration reloads.
## Syntax
~~~ txt