8567: Add note about updating API server configuration.

diff --git a/doc/install/migrate-docker19.html.textile.liquid b/doc/install/migrate-docker19.html.textile.liquid
index 656cd911cc3857c582f7bece3bab1e79e6d7c849..2dca03904c52e482349bd9cfe9d10db6b9f640d7 100644 (file)
--- a/doc/install/migrate-docker19.html.textile.liquid
+++ b/doc/install/migrate-docker19.html.textile.liquid
@@ -23,3 +23,9 @@ ii) load it into Docker
 iii) update the Docker version, which updates the image
 iv) save the v2 format image and upload to Arvados
 v) create a migration link
+
+Once the Docker images in Keep have been migrated, upgrade the version of Docker used across the cluster.  Finally, update the API server configuration from "v1" to "v2" to reflect the supported Docker image version:
+
+<pre>
+docker_image_formats: ["v2"]
+</pre>