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-rw-r--r--middleware/kubernetes/README.md7
1 files changed, 7 insertions, 0 deletions
diff --git a/middleware/kubernetes/README.md b/middleware/kubernetes/README.md
index 323dc9197..191bbe88e 100644
--- a/middleware/kubernetes/README.md
+++ b/middleware/kubernetes/README.md
@@ -108,6 +108,13 @@ kubernetes coredns.local {
#
cidrs 10.0.0.0/24 10.0.10.0/25
+ # upstream <address> [<address>] ...
+ #
+ # Defines upstream resolvers used for resolving services that point to
+ # external hosts (External Services). <address> can be an ip, and ip:port, or
+ # a path to a file structured like resolv.conf.
+ upstream 12.34.56.78:53
+
# fallthrough
#
# If a query for a record in the cluster zone results in NXDOMAIN,