From 98e45b7ce88e483e7a27642051ca554b06c72aed Mon Sep 17 00:00:00 2001 From: Vivek Saraswat Date: Fri, 5 Aug 2016 16:58:41 -0700 Subject: [PATCH] Make DTR install on UCP node requirement clearer During DockerCon workshops and other customer sessions several people have noted that it is not clear that DTR must be installed on a node already joined to the UCP cluster (they asked if it automatically joined the UCP cluster or not). Adding two lines (one in install and one in replica joins) that hopefully makes this clearer. --- install/index.md | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/install/index.md b/install/index.md index 2d7e9505b8..b4e2e0329b 100644 --- a/install/index.md +++ b/install/index.md @@ -32,7 +32,7 @@ infrastructure has all the [requirements DTR needs to run](system-requirements.m Since DTR requires a Docker Universal Control Plane (UCP) cluster to run, you need to install UCP first. -[Learn how to install UCP](https://docs.docker.com/ucp/installation/install-production/). +[Learn how to install UCP](https://docs.docker.com/ucp/installation/install-production/). Make sure that the node you install DTR on is already joined to the UCP cluster. ## Step 3. Install DTR @@ -113,7 +113,7 @@ This step is optional. To set up DTR for [high availability](../high-availability/index.md), you can add more replicas to your DTR cluster. Adding more replicas allows you to load-balance requests across all replicas, and keep DTR working if a -replica fails. +replica fails. Each replica must be located on a node already joined to the UCP cluster. To add replicas to a DTR cluster, use the `docker/dtr join` command. To add replicas: