Gluster Cluster

This is a simple and specific setup for creating a Gluster cluster that uses one volume across multiple servers.

The setup will try to use all the servers that are part of the play.

Requirements

• Currently, only CentOS servers are supported.

• All servers must have the same block devices. In particular, the block devices listed in gluster_cluster_block_devices must be present on all servers in the cluster.

Required Settings

• gluster_cluster_volume_name: The name of the Gluster volume you want to create.
• gluster_cluster_block_devices: A list of block devices to use for creating bricks.
• gluster_cluster_transport_interface: For example, ib0 or enp0s1.
• gluster_cluster_transport_mode: Can be either tcp or rdma.

Optional Settings

• gluster_cluster_hosts: By default, this uses all servers in the gluster_cluster_storage_group_name group. These are the servers that provide the bricks for the volume in the Gluster cluster.
• gluster_cluster_storage_group_name: Defaults to storage. This is the Ansible group name for storage servers from the inventory file.
• gluster_cluster_volume_options: A dictionary of options for the Gluster volume.
• gluster_cluster_volume_base_path: The main folder where volumes will be stored.
• gluster_cluster_stripes: Defaults to 0. See documentation for more info.
• gluster_cluster_disperses: Defaults to 0. See documentation for more info.
• gluster_cluster_replicas: Defaults to 0. See documentation for more info.
• gluster_cluster_redundancies: Defaults to 0. See documentation for more info.

Link to Documentation

Dependencies

None

Example Playbook

The following playbook sets up a Gluster volume:

---
- name: Configure Gluster
  hosts: storage
  roles:
    - role: gluster-cluster
      gluster_cluster_volume_name: my_volume
      gluster_cluster_block_devices:
        - sdb
        - sdc
        - sdd
      gluster_cluster_transport_interface: ib0
      gluster_cluster_transport_mode: rdma
      gluster_cluster_volume_options:
        cluster.nufa: 'on'

Author Information

• Doug Szumski (doug@stackhpc.com)