Change node to site for Geo docker registry docs

doc/administration/geo/replication/docker_registry.md

@@ -5,16 +5,16 @@ info: To determine the technical writer assigned to the Stage/Group associated w
 type: howto
 ---
 
-# Docker Registry for a secondary node **(PREMIUM SELF)**
+# Docker Registry for a secondary site **(PREMIUM SELF)**
 
 You can set up a [Docker Registry](https://docs.docker.com/registry/) on your
-**secondary** Geo node that mirrors the one on the **primary** Geo node.
+**secondary** Geo site that mirrors the one on the **primary** Geo site.
 
 ## Storage support
 
 Docker Registry currently supports a few types of storage. If you choose a
 distributed storage (`azure`, `gcs`, `s3`, `swift`, or `oss`) for your Docker
-Registry on the **primary** node, you can use the same storage for a **secondary**
+Registry on the **primary** site, you can use the same storage for a **secondary**
 Docker Registry as well. For more information, read the
 [Load balancing considerations](https://docs.docker.com/registry/deploying/#load-balancing-considerations)
 when deploying the Registry, and how to set up the storage driver for the GitLab
@@ -24,22 +24,22 @@ integrated [Container Registry](../../packages/container_registry.md#use-object-
 
 You can enable a storage-agnostic replication so it
 can be used for cloud or local storage. Whenever a new image is pushed to the
-**primary** node, each **secondary** node will pull it to its own container
+**primary** site, each **secondary** site will pull it to its own container
 repository.
 
 To configure Docker Registry replication:
 
-1. Configure the [**primary** node](#configure-primary-node).
-1. Configure the [**secondary** node](#configure-secondary-node).
+1. Configure the [**primary** site](#configure-primary-site).
+1. Configure the [**secondary** site](#configure-secondary-site).
 1. Verify Docker Registry [replication](#verify-replication).
 
-### Configure **primary** node
+### Configure **primary** site
 
 Make sure that you have Container Registry set up and working on
-the **primary** node before following the next steps.
+the **primary** site before following the next steps.
 
 We need to make Docker Registry send notification events to the
-**primary** node.
+**primary** site.
 
 1. SSH into your GitLab **primary** server and login as root:
 
@@ -85,27 +85,29 @@ We need to make Docker Registry send notification events to the
    gitlab-ctl reconfigure
    ```
 
-### Configure **secondary** node
+### Configure **secondary** site
 
 Make sure you have Container Registry set up and working on
-the **secondary** node before following the next steps.
+the **secondary** site before following the next steps.
 
-The following steps should be done on each **secondary** node you're
+The following steps should be done on each **secondary** site you're
 expecting to see the Docker images replicated.
 
-Because we need to allow the **secondary** node to communicate securely with
-the **primary** node Container Registry, we need to have a single key
-pair for all the nodes. The **secondary** node will use this key to
+Because we need to allow the **secondary** site to communicate securely with
+the **primary** site Container Registry, we need to have a single key
+pair for all the sites. The **secondary** site will use this key to
 generate a short-lived JWT that is pull-only-capable to access the
-**primary** node Container Registry.
+**primary** site Container Registry.
 
-1. SSH into the **secondary** node and login as the `root` user:
+For each application node on the **secondary** site: 
+
+1. SSH into the node and login as the `root` user:
 
    ```shell
    sudo -i
    ```
 
-1. Copy `/var/opt/gitlab/gitlab-rails/etc/gitlab-registry.key` from the **primary** to the **secondary** node.
+1. Copy `/var/opt/gitlab/gitlab-rails/etc/gitlab-registry.key` from the **primary** to the node.
 
 1. Edit `/etc/gitlab/gitlab.rb`:
 
@@ -114,7 +116,7 @@ generate a short-lived JWT that is pull-only-capable to access the
    gitlab_rails['geo_registry_replication_primary_api_url'] = 'https://primary.example.com:5050/' # Primary registry address, it will be used by the secondary node to directly communicate to primary registry
    ```
 
-1. Reconfigure the **secondary** node for the change to take effect:
+1. Reconfigure the node for the change to take effect:
 
    ```shell
    gitlab-ctl reconfigure
@@ -123,6 +125,6 @@ generate a short-lived JWT that is pull-only-capable to access the
 ### Verify replication
 
 To verify Container Registry replication is working, go to **Admin Area > Geo**
-(`/admin/geo/nodes`) on the **secondary** node.
+(`/admin/geo/nodes`) on the **secondary** site.
 The initial replication, or "backfill", will probably still be in progress.
-You can monitor the synchronization process on each Geo node from the **primary** node's **Geo Nodes** dashboard in your browser.
+You can monitor the synchronization process on each Geo site from the **primary** site's **Geo Nodes** dashboard in your browser.