DAS: Core Concepts
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Installation Roadmap

The DAS cluster agent comprises of the DAS Webapp and a DAS Event Processor. These components are installed on the Ambari cluster to use with DAS. Additionally, there is the DAS App which is installed within the DP environment, and it communicates with the DAS components in the cluster.

To install DAS, review the installation roadmap and follow the steps. You are strongly encouraged to read completely through this entire document before starting the installation process, so that you understand the interdependencies and order of the steps.

Table 1. DAS/DAS-Lite Installation Roadmap
No. Task Description
Pre-installation tasks
1 Check the minimal cluster requirements. The mandatory components to get started with DAS are Ambari and DataPlane. To install and set up the necessary components and services, see Install the Prerequisite Components and Services.
2 Check the cluster configuration for Hive and Tez.

Check the configuration settings for Hive and Tez in Ambari.

3 Create and set up a local repository. Hortonworks does not host any public repository for DAS. Therefore, you need to setup a local repository to install the binaries. See Create and Set up a Local Repository.
4 Evaluate the database options. DAS requires a PostgreSQL database for storing query event information. See Evaluate your Database Options.
Installing and configuring DAS on the HDP clusters
5 Install the DAS management pack. Install DAS cluster components (the DAS Webapp and the DAS Event Processor) on the same machine on which you have installed the Ambari server, using an Ambari management pack (MPack). See Installing the DAS Cluster Components on the Ambari Host.
6 Add the DAS service. After installing the DAS MPack through the Ambari console, add the DAS service through the Ambari UI. See Adding the DAS Service through the Ambari UI.
7 Configure DAS for Knox SSO. To enable DAS to work with the HDP cluster SSO, configure the Knox settings as described in Configuring DAS for Knox SSO.
8 Configure DAS for SSL.

(Optional)

If your HDP cluster is SSL enabled, then you can configure SSL by using one of the following two options:

After setting up the certificates, don't forget to configure SSL/TLS in Ambari. See Configure SSL/TLS in Ambari.

Installing DAS in DataPlane
9 Install the DAS App. After adding the DAS service in the Ambari UI, install the DAS DP App in the DP environment. See Installing the DAS App in DP.
10 Register and enable the clusters for DAS. After installing the DAS app, you must register and enable clusters for it on the DP Platform. See Enabling the Clusters for DAS on the DP Platform.
11 Assign users and roles for DAS. After you set up the LDAP configuration for DP Platform, you need to add users for the DAS app. During the LDAP configuration, you add users and groups that can log in as a DP admin. You must now assign roles to users and groups that allow the users to access the services that plug into DataPlane. See Adding Users and Assigning Roles for the DAS App.