Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

ExternalName warning about HTTP/TLS #16704

Merged
merged 1 commit into from
Oct 9, 2019
Merged

ExternalName warning about HTTP/TLS #16704

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
5 changes: 5 additions & 0 deletions content/en/docs/concepts/services-networking/service.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -911,6 +911,11 @@ forwarding. Should you later decide to move your database into your cluster, you
can start its Pods, add appropriate selectors or endpoints, and change the
Service's `type`.

{{< warning >}}
You may have trouble using ExternalName for some common protocols, including HTTP and HTTPS. If you use ExternalName then the hostname used by clients inside your cluster is different from the name that the ExternalName references.

For protocols that use hostnames this difference may lead to errors or unexpected responses. HTTP requests will have a `Host:` header that the origin server does not recognize; TLS servers will not be able to provide a certificate matching the hostname that the client connected to.
{{< /warning >}}

{{< note >}}
This section is indebted to the [Kubernetes Tips - Part
Expand Down