E-MapReduce:Manage projects

Prerequisites

Before you begin, ensure that you have:

• An EMR cluster. See Create a cluster

• An Alibaba Cloud account (required for most administrative actions — see Limits below)

Limits

Only an Alibaba Cloud account can perform the following actions. The corresponding UI controls are hidden from RAM users.

To grant a RAM user development permissions on a project, see Manage RAM users.

Create a project

1. Log on to the EMR console with your Alibaba Cloud account.

2. In the top navigation bar, select the region where your cluster resides and select a resource group.

3. Click the Data Platform tab.

4. In the upper-right corner of the Projects section, click Create Project.

5. In the Create Project dialog box, enter a Project Name and Project Description and select an existing resource group from the Select Resource Group drop-down list, and select a resource group from the Select Resource Group drop-down list.

   If you leave Select Resource Group blank, the project is added to the default resource group. For details on resource groups, see Use resource groups.

6. Click Create.

The project appears in the Projects section.

View project details

1. Log on to the EMR console.

2. In the top navigation bar, select the region and resource group.

3. Click the Data Platform tab.

4. In the Projects section, click the project ID.

5. Click the Projects tab.

The Basic Information page shows the project name, creation time, description, and the user who created the project.

Enable security mode

Security mode lets you control which EMR user accounts can submit jobs within a project.

• If you submit a job with your Alibaba Cloud account, the job runs as the hadoop user.

• If you submit a job as a RAM user, the job runs as the EMR user account with the same name as the RAM user.

After enabling security mode, add the relevant EMR user accounts on the Users page. See Manage user accounts.

Notice: After you enable security mode, Shell and Hive jobs cannot run in the project.

To enable or disable security mode:

1. Log on to the EMR console with your Alibaba Cloud account.

2. In the top navigation bar, select the region and resource group.

3. Click the Data Platform tab.

4. In the Projects section, click the project ID, then click the Projects tab.

5. In the left navigation pane, click General Configuration.

6. Turn Security Mode on or off.

Manage RAM users

Add RAM users to a project to grant them development permissions (view and develop jobs and workflows). Only an Alibaba Cloud account can manage project members.

1. Log on to the EMR console with your Alibaba Cloud account.

2. In the top navigation bar, select the region and resource group.

3. Click the Data Platform tab.

4. In the Projects section, click the project ID, then click the Projects tab.

5. In the left navigation pane, click Users.

6. Add or remove users:

   • Add a user: Click Add User in the upper-right corner. In the Add User dialog box, select the RAM user and click Add.

   • Remove a user: Find the RAM user in the list and click Delete in the Actions column.

Configure cluster resources

Associate one or more clusters with a project so that jobs in the project can run on those clusters. Only subscription and pay-as-you-go clusters are supported. Clusters created from a cluster template are not supported.

Define custom variables

Custom variables are project-level global variables that jobs in the project can reference using the ${VariableName} syntax.

For example, if you define a variable named ENV_ABC with the value 12345, running echo ${ENV_ABC} in a job returns 12345. This is equivalent to running export ENV_ABC=12345 in the job environment.

What's next

• Manage user accounts — add EMR user accounts to use with security mode

• Use resource groups — organize your EMR resources by group