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-rw-r--r--doc/ci/docker/using_docker_images.md3
1 files changed, 3 insertions, 0 deletions
diff --git a/doc/ci/docker/using_docker_images.md b/doc/ci/docker/using_docker_images.md
index 31649ee2792..959271d8abc 100644
--- a/doc/ci/docker/using_docker_images.md
+++ b/doc/ci/docker/using_docker_images.md
@@ -67,6 +67,9 @@ services you need to `.gitlab-ci.yml` or manually modify `config.toml`.
Any image found at [Docker Hub][hub] or your private Container Registry can be
used as a service.
+Services inherit the same DNS servers, search domains, and additional hosts as
+the CI container itself.
+
You can see some widely used services examples in the relevant documentation of
[CI services examples](../services/README.md).