ansible-hadoop

These Ansible playbooks will build a Hadoop cluster.

You can pre-build a Rackspace cloud environment or run the playbooks against an existing environment.

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[Installation] (id:installation)

See INSTALL-ENV.md for installation and build instructions.

[Requirements] (id:requirements)

• Ansible == 2.1.3.0 (2.2 is not supported at the moment)

• Expects RHEL/CentOS 6/7 or Ubuntu 14 hosts.

• Building the Rackspace Cloud environment requires the pyrax Python module: pyrax link.

[Features] (id:features)

• It installs Hortonworks Data Platform using Ambari Blueprints.

• It supports static inventory if the environment is pre-built (inventory/static file).

• The data drives can be customized and can be put on top of Cloud Block Storage (partitioning is automatic).

• If there are 2 or 3 masternodes, it will also enable HA NameNode.

• Memory settings are scaled with the hardware configuration of the nodes.

[Inventory] (id:inventory)

• The cloud environment requires the standard pyrax credentials file that looks like this:

  [rackspace_cloud]
  username = my_username
  api_key = 01234567890abcdef
  

  This file will be referenced in playbooks/group_vars/all (the rax_credentials_file variable).

  By default, the file is expected to be: ~/.raxpub.

• When provisioning HDP on existing infrastructure edit inventory/static and add the nodes.

[Configuration files] (id:configuration)

To customize, change the variables under playbooks/group_vars folder:

1. playbooks/group_vars/all: contains global cluster and cloud settings
2. playbooks/group_vars/master-nodes: master-nodes configuration
3. playbooks/group_vars/slave-nodes: slave-nodes configuration
4. playbooks/group_vars/edge-nodes: edge-nodes configuration

For a one-node cluster, set cloud_nodes_count in master-nodes to 1 and cloud_nodes_count in slave-nodes to 0.

[Scripts] (id:scripts)

###provision_rax.sh

To provision a cloud environment, run the provision_rax.sh script after you've customized the variables under playbooks/group_vars:

bash provision_rax.sh

Continue with the HDP deployment steps here : HDP Install