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new 30411d4 docs(discovery): make dns query order clear (#5033)
30411d4 is described below
commit 30411d44d9bf3812c3f664897b2cf7d6ccdf048e
Author: 罗泽轩 <[email protected]>
AuthorDate: Sat Sep 11 19:09:08 2021 +0800
docs(discovery): make dns query order clear (#5033)
See https://github.com/apache/apisix/pull/5023/files#r705594923
Signed-off-by: spacewander <[email protected]>
---
docs/en/latest/discovery/dns.md | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/docs/en/latest/discovery/dns.md b/docs/en/latest/discovery/dns.md
index 65be2cc..d169463 100644
--- a/docs/en/latest/discovery/dns.md
+++ b/docs/en/latest/discovery/dns.md
@@ -66,7 +66,9 @@ and `test.consul.service` be resolved as `1.1.1.1` and
`1.1.1.2`, this result wi
Note that all the IPs from `test.consul.service` share the same weight.
-If a service has both A and AAAA records, A record is preferred.
+The resolved records will be cached according to their TTL.
+For service whose record is not in the cache, we will query it in the order of
`SRV -> A -> AAAA -> CNAME`.
+When we refresh the cache record, we will try from the last previously
successful type.
If you want to specify the port for the upstream server, you can add it to the
`service_name`:
