Quick Cluster Manager Installation

The rest of this section lays out the steps required to install and configure Gurobi Remote Services and the Cluster Manager. Before diving into those details, though, we first want to provide a quick, high-level overview. The intent is to give you a basic understanding of the relevant concepts and tools. We suggest that you try these steps on your local machine before performing them on your server.

1. Download and install the Gurobi client and Remote Services packages from our download page. Detailed instructions depend on your platform and are provided in this section.

2. Install and start a MongoDB database (as explained in their on-line guide). If you are deploying the Cluster Manager on the AWS platform, you can also use an AWS DocumentDB (as explained in their developer guide). AWS DocumentDB cannot be installed on-premises. If you are deploying the Cluster Manager on the Microsoft Azure platform, you can also use an Azure CosmosDB (as explained in their documentation). Please refer to the releases notes to check on the supported versions of each database offering.

3. Start the Cluster Manager.

   In a new terminal window, start the Cluster Manager executable:

   > grb_rsm
   info  : Gurobi Cluster Manager starting...
   info  : Version is 12.0.0
   info  : Connecting to database grb_rsm on 127.0.0.1:27017...
   info  : Connected to database grb_rsm (version 4.0.4)
   info  : Starting cluster manager server (HTTP) on port 61080...
   

   The default configuration will start the Cluster Manager on port 61080 and will connect to the database on the local machine. If you have installed the database with other options or want to use an existing database, you can provide a database connection string with the —-database flag:

   > grb_rsm --database=....
   

   The Cluster Manager has several important options that are detailed in this section.

4. Get your Gurobi license.

   Follow the instructions in the Gurobi User Portal to retrieve your license. To avoid conflicts with client license files, you should place your license file in a non-default location:

   grbgetkey 8f15037e-eae7-4831-9a88-ffe079eabdeb
   info  : grbgetkey version 12.0.0
   info  : Contacting Gurobi key server...
   info  : Key for license ID XXXXX was successfully retrieved
   info  : Saving license key...
   
   In which directory would you like to store the Gurobi license key file?
   [hit Enter to store it in /Users/john]: /Users/john/tutorial
   
   info  : License XXXXX written to file /Users/john/tutorial/gurobi.lic
   info  : You may have saved the license key to a non-default location
   info  : You need to set the environment variable GRB_LICENSE_FILE before you can use this license key
   info  : GRB_LICENSE_FILE=/Users/john/tutorial/gurobi.lic
   

5. Connect a Compute Server node.

   In a new terminal, set the license file variable. For Linux and macOS, use this command:

   export GRB_LICENSE_FILE=/Users/john/tutorial/gurobi.lic
   

   For Windows, use this command instead:

   SET GRB_LICENSE_FILE=/Users/john/tutorial/gurobi.lic
   

   Then, start a Remote Services agent, using a few parameters to connect to the manager and to run on port 61000:

   > grb_rs --manager=http://localhost:61080 --port=61000
   info  : Gurobi Remote Services starting...
   info  : Version is 12.0.0
   info  : Accepting worker registration on port 64121...
   info  : Starting API server (HTTP) on port 61000...
   info  : Joining cluster from manager
   

   The Remote Services Agent has several important options that are detailed in this section.

6. Open the Cluster Manager Web UI in a browser at http://localhost:61080.

   You will be asked to log in. You can use one of the three predefined users and passwords (gurobi/pass, admin/admin, sysadmin/cluster). If you navigate to the cluster section, you should see the Compute Server node status display.

7. Log in to the Cluster Manager using the command-line tools.

   In a new terminal, log in to the Cluster Manager using the appropriate connection parameters. Connection information is stored into your gurobi.lic client license file once you connect, so you won’t need to include these parameters with each future command.

   grbcluster login --manager=http://localhost:61080 --username=gurobi
   

   Enter the default password ’pass’ when prompted.

   More options and detailed client configuration is explained in a following section.

8. Submit jobs and batches from the command-line tools or the programming language APIs.

   Once you have logged in, you are ready to submit optimizations requests. In the following examples, we will refer to the installation directory of the main Gurobi tools and libraries as <gurobi_installation>.

   You can submit an interactive job:

   gurobi_cl ResultFile=solution.sol <gurobi_installation>/examples/data/misc07.mps
   

   You can also submit a batch job and wait for the completion to download the results:

   grbcluster batch solve ResultFile=solution.sol <gurobi_installation>/examples/data/misc07.mps --download
   

   Finally, you can submit a batch with the Python API. The Gurobi distribution includes a complete example:

   python <gurobi_installation>/examples/python/workforce_batchmode.py
   

   The followup sections give more details on the command line tools and the programming language APIs.

Let’s now dive into more detailed discussions of these steps.