Install the DLM Service App

After installing the DPS Platform, install the DLM Service App. All service applications are installed as RPMs on the same host as DPS Platform. You can install one DPS service or a combination of DPS services with DPS Platform.

You must have root access to the host on which you are installing DLM.

You must have successfully installed DPS Platform.

Log in as root to the host on which you set up the DPS repositories.
```
sudo su
```
Start the Docker service, if not started.
```
service docker start
```
Install the RPMs for the DLM service application.
```
yum install dlm-app
```
A folder is created that contains the Docker image tarball files and a configuration script.
If the yum command fails, then the local repository was not set up correctly. Check the repository file /etc/yum.repos.d/dlm.repo on the host.
Navigate to the directory containing the installation scripts for the DLM service, for example:
cd /usr/dlm-app/current/apps/dlm/bin
Load the DLM Docker images and initialize the environment.
./dlmdeploy.sh init

Loading the images might take a while.
Verify that the container you installed is running.
docker ps

The entry should be similar to the following:

If any containers are not running, you must destroy the containers and start over, as described in the troubleshooting section of the DPS Installation guide.

You must install DLM Engine on each cluster.