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4.2. Deploying Red Hat Openshift Container Storage in Converged Mode

  1. In your inventory file, include the following variables in the [OSEv3:vars] section, adjusting them as needed for your configuration: 
    [OSEv3:vars]
openshift_storage_glusterfs_namespace=app-storage
openshift_storage_glusterfs_storageclass=true
openshift_storage_glusterfs_storageclass_default=false
openshift_storage_glusterfs_block_deploy=true
openshift_storage_glusterfs_block_host_vol_create=true
openshift_storage_glusterfs_block_host_vol_size=100
openshift_storage_glusterfs_block_storageclass=true
openshift_storage_glusterfs_block_storageclass_default=false
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  2. In your inventory file, add glusterfs in the [OSEv3:children] section to enable the [glusterfs] group: 
    [OSEv3:children]
masters
etcd
nodes
glusterfs
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  3. Add a [glusterfs] section with entries for each storage node that will host the GlusterFS storage. For each node, set glusterfs_devices to a list of raw block devices that will be completely managed as part of a GlusterFS cluster. There must be at least one device listed. Each device must be bare, with no partitions or LVM PVs. Specifying the variable takes the form: 
    <hostname_or_ip> glusterfs_devices='[ "</path/to/device1/>", "</path/to/device2>", ... ]'
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    For example: 
    [glusterfs]
node11.example.com glusterfs_devices='[ "/dev/xvdc", "/dev/xvdd" ]'
node12.example.com glusterfs_devices='[ "/dev/xvdc", "/dev/xvdd" ]'
node13.example.com glusterfs_devices='[ "/dev/xvdc", "/dev/xvdd" ]'
node14.example.com glusterfs_devices='[ "/dev/xvdc", "/dev/xvdd" ]'
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  4. Add the hosts listed under [glusterfs] to the [nodes] group: 
    [nodes]
...
node11.example.com openshift_node_group_name="node-config-infra"
node12.example.com openshift_node_group_name="node-config-infra"
node13.example.com openshift_node_group_name="node-config-infra"
node14.example.com openshift_node_group_name="node-config-infra"
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  5. The preceding steps detail options that need to be added to a larger, complete inventory file. To use the complete inventory file to deploy {gluster} provide the file path as an option to the following playbooks:

    • For an initial OpenShift Container Platform installation: 
      ansible-playbook -i <path_to_inventory_file> /usr/share/ansible/openshift-ansible/playbooks/prerequisites.yml

ansible-playbook -i <path_to_inventory_file> /usr/share/ansible/openshift-ansible/playbooks/deploy_cluster.yml
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    • For a standalone installation onto an existing OpenShift Container Platform cluster: 
      ansible-playbook -i <path_to_inventory_file> /usr/share/ansible/openshift-ansible/playbooks/openshift-glusterfs/config.yml
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  6. To verify the deployment see, Section 4.6, “Verify your Deployment”.
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