Esri releases new ArcGIS Server Cloud Builder on Amazon Web Services AMIs and an updated Cloud Builder application shortly after each new ArcGIS release. You should use the latest version of Cloud Builder when you build new sites. See Cloud Builder upgrades to learn when and how to upgrade Cloud Builder.

To update existing sites, you must log in to your EC2 instances and apply the update directly. To minimize downtime, you can use Cloud Builder's site templates to launch a copy of your site. Once you have applied the update on the copy, you can redirect traffic into your upgraded site and delete the old site.

If you have a multiple-machine site, you must also create a template of your upgraded site and use the template to launch a new site with the desired number of machines.

The help topics in this section provide instructions for upgrading single-machine and multiple-machine sites.

• Apply an ArcGIS update to a single-machine site
• Apply an ArcGIS update to a Windows multiple-machine site
• Apply an ArcGIS update to an Ubuntu multiple machine site

If you don't want to apply the update on an existing instance, you can either maintain your site at its current version, or you can launch a new site from the latest version of Cloud Builder and redeploy your services and applications on it.

If you did not build your site using Cloud Builder, you should log in to the EC2 instances and apply the update directly. If you need to minimize downtime, you can save an Amazon Machine Image (AMI) of your instance and use it to launch a copy of your instance. You can then apply the update on the copy.