Overcloud

This page details how to deploy and use an Overcloud once the Undercloud is installed.

There are 3 scripts for convenience.

Note that deploy-overcloud can be configured for individual environments via environment variables. The variables you can set are documented below before the calls to the script. For their default values, see the deploy-overcloud script itself.

You must source the contents of tripleo-undercloud-passwords and stackrc into your shell before running the instack-* scripts that interact with the undercloud and overcloud. In order to do that you can copy that file to a more convenient location or use sudo to cat the file and copy/paste the lines into your shell environment.
Run the prepare-for-overcloud script to get setup. This script will re-downloading images if they already exist in the current working directory. If you want to force a redownload of the images, delete them first.
```
 source tripleo-undercloud-passwords
 source stackrc
 instack-prepare-for-overcloud
```
Edit the deploy-overcloudrc script to set the scaling variable values used to deploy the overcloud. Set the values to to the number of nodes deployed for each role type. You must deploy at least 1 Compute node, but do not need to deploy any block storage or object storage nodes.
```
 COMPUTESCALE=${COMPUTESCALE:-1}
 BLOCKSTORAGESCALE=${BLOCKSTORAGESCALE:-0}
 SWIFTSTORAGESCALE=${SWIFTSTORAGESCALE:-0}
```
Deploy the overcloud using heat:
```
 # heat
 instack-deploy-overcloud
```
Run the test-overcloud script to launch a Fedora image on the overcloud and wait until it pings successfully
```
 instack-test-overcloud
```

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Overcloud

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