gluster Cookbook

This cookbook is used to install and configure Gluster on both servers and clients. This cookbook makes several assumptions when configuring Gluster servers:

1. If using the cookbook to format disks, each disk will contain a single partition dedicated for Gluster
2. Non-replicated volume types are not supported
3. All peers for a volume will be configured with the same number of bricks

Platforms

This cookbook has been tested on Ubuntu 12.04/14.04 and CentOS 6.5.

Attributes

gluster::default

• node['gluster']['version'] - version to install, defaults to 3.4

gluster::client

Node attributes to specify volumes to mount. This has been deprecated in favor of using the 'gluster_mount' LWRP.

• node['gluster']['client']['volumes'][VOLUME_NAME]['server'] - server to connect to
• node['gluster']['client']['volumes'][VOLUME_NAME]['backup_server'] - name of the backup volfile server to mount the client. When the first volfile server fails, then the server specified here is used as volfile server and is mounted by the client. This can be a String or Array of Strings.
• node['gluster']['client']['volumes'][VOLUME_NAME]['mount_point'] - mount point to use for the Gluster volume

gluster::server

Node attributes to specify server volumes to create

• node['gluster']['server']['brick_mount_path'] - default path to use for mounting bricks
• node['gluster']['server']['disks'] - an array of disks to create partitions on and format for use with Gluster, (for example, ['sdb', 'sdc'])
• node['gluster']['server']['volumes'][VOLUME_NAME]['allowed_hosts'] - an optional array of IP addresses to allow access to the volume
• node['gluster']['server']['volumes'][VOLUME_NAME]['disks'] - an optional array of disks to put bricks on (for example, ['sdb', 'sdc']); by default the cookbook will use the first x number of disks, equal to the replica count
• node['gluster']['server']['volumes'][VOLUME_NAME]['lvm_volumes'] - an optional array of logical volumes to put bricks on (for example, ['LogVolGlusterBrick1', 'LogVolGlusterBrick2']); by default the cookbook will use the first x number of volumes, equal to the replica count
• node['gluster']['server']['volumes'][VOLUME_NAME]['peers'] - an array of FQDNs for peers used in the volume
• node['gluster']['server']['volumes'][VOLUME_NAME]['quota'] - an optional disk quota to set for the volume, such as '10GB'
• node['gluster']['server']['volumes'][VOLUME_NAME]['replica_count'] - the number of replicas to create
• node['gluster']['server']['volumes'][VOLUME_NAME]['volume_type'] - the volume type to use; currently 'replicated' and 'distributed-replicated' are the only types supported

LWRPs

Use the gluster_mount LWRP to mount volumes on clients:

gluster_mount 'volume_name' do
  server 'gluster1.example.com'
  backup_server 'gluster2.example.com'
  mount_point '/mnt/gluster/volume_name'
  action [:mount, :enable]
end

gluster_mount 'volume_name' do
  server 'gluster1.example.com'
  backup_server ['gluster2.example.com', 'gluster3.example.com']
  mount_point '/mnt/gluster/volume_name'
  action [:mount, :enable]
end

Usage

On two or more identical systems, attach the desired number of dedicated disks to use for Gluster storage. Add the gluster::server recipe to the node's run list and add any appropriate attributes, such as volumes to the ['gluster']['server']['volumes'] attribute. If the cookbook will be used to manage disks, add the disks to the ['gluster']['server']['disks'] attribute; otherwise format the disks appropriately and add them to the ['gluster']['server']['volumes'][VOLUME_NAME]['disks'] attribute. Once all peers for a volume have configured their bricks, the 'master' peer (the first in the array) will create and start the volume.

For clients, add the gluster::default or gluster::client recipe to the node's run list, and mount volumes using the gluster_mount LWRP. The Gluster volume will be mounted on the next chef-client run (provided the volume exists and is available) and added to /etc/fstab.