Deploying Manila in the Overcloud

Deploying Manila in the Overcloud

This guide assumes that your undercloud is already installed and ready to deploy an overcloud with Manila enabled.

Deploying the Overcloud with the Internal Ceph Backend

Ceph deployed by TripleO can be used as a Manila share backend. Make sure that Ceph, Ceph MDS and Manila Ceph environment files are included when deploying the Overcloud:

openstack overcloud deploy --templates \
-e /usr/share/openstack-tripleo-heat-templates/environments/ceph-ansible/ceph-ansible.yaml \
-e /usr/share/openstack-tripleo-heat-templates/environments/ceph-ansible/ceph-mds.yaml \
-e /usr/share/openstack-tripleo-heat-templates/environments/manila-cephfsnative-config.yaml

Note

These and any other environment files or options passed to the overcloud deploy command, are referenced below as the “full environment”. We assumed the --plan flag is not what we want to use for this example.

Network Isolation

When mounting a ceph share from a user instance, the user instance needs access to the Ceph public network. When mounting a ceph share from a user instance, the user instance needs access to the Ceph public network, which in TripleO maps to the Overcloud storage network. In an Overcloud which uses isolated networks the tenant network and storage network are isolated from one another so user instances cannot reach the Ceph public network unless the cloud administrator creates a provider network in neutron that maps to the storage network and exposes access to it.

Before deploying Overcloud make sure that there is a bridge for storage network interface. If single NIC with VLANs network configuration is used (as in /usr/share/openstack-tripleo-heat-templates/network/config/single-nic-vlans/) then by default br-ex bridge is used for storage network and no additional customization is required for Overcloud deployment. If a dedicated interface is used for storage network (as in /usr/share/openstack-tripleo-heat-templates/network/config/multiple-nics/) then update storage interface for each node type (controller, compute, ceph) to use bridge. The following interface definition:

- type: interface
    name: nic2
    use_dhcp: false
    addresses:
    - ip_netmask:
        get_param: StorageIpSubnet

should be replaced with:

- type: ovs_bridge
  name: br-storage
  use_dhcp: false
  addresses:
  - ip_netmask:
      get_param: StorageIpSubnet
  members:
  - type: interface
    name: nic2
    use_dhcp: false
    primary: true

And pass following parameters when deploying Overcloud to allow Neutron to map provider networks to the storage bridge:

parameter_defaults:
    NeutronBridgeMappings: datacentre:br-ex,storage:br-storage
    NeutronFlatNetworks: datacentre,storage

If the storage network uses VLAN, include storage network in NeutronNetworkVLANRanges parameter. For example:

NeutronNetworkVLANRanges: 'datacentre:100:1000,storage:30:30'

Warning

If network isolation is used, make sure that storage provider network subnet doesn’t overlap with IP allocation pool used for Overcloud storage nodes (controlled by StorageAllocationPools heat parameter). StorageAllocationPools is by default set to [{'start': '172.16.1.4', 'end': '172.16.1.250'}]. It may be neccessary to shrink this pool, for example:

StorageAllocationPools: [{'start': '172.16.1.4', 'end': '172.16.1.99'}]

When Overcloud is deployed, create a provider network which can be used to access storage network.

  • If single NIC with VLANs is used, then the provider network is mapped to the default datacentre network:

    neutron net-create storage --shared --provider:physical_network \
      datacentre --provider:network_type vlan --provider:segmentation_id 30
    
    neutron subnet-create --name storage-subnet \
      --allocation-pool start=172.16.1.100,end=172.16.1.120 \
      --enable-dhcp storage 172.16.1.0/24
    
  • If a custom bridge was used for storage network interface (br-storage in the example above) then provider network is mapped to the network specified by NeutronBridgeMappings parameter (storage network in the example above):

    neutron net-create storage --shared --provider:physical_network storage \
      --provider:network_type flat
    
    neutron subnet-create --name storage-subnet \
      --allocation-pool start=172.16.1.200,end=172.16.1.220 --enable-dhcp \
      storage 172.16.1.0/24 --no-gateway
    

Note

Allocation pool should not overlap with storage network pool used for storage nodes (StorageAllocationPools parameter). You may also need to shrink storage nodes pool size to reserve more IPs for tenants using the provider network.

Note

Make sure that subnet CIDR matches storage network CIDR (StorageNetCidr parameter)and segmentation_id matches VLAN ID for the storage network traffic (StorageNetworkVlanID parameter).

Then Ceph shares can be accessed from a user instance by adding the provider network to the instance.

Note

Cloud-init by default configures only first network interface to use DHCP which means that user intances will not have network interface for storage network autoconfigured. You can configure it manually or use dhcp-all-interfaces.

Deploying the Overcloud with an External Backend

Note

The Deploying with Heat Templates doc has a more detailed explanation of the following steps.

  1. Copy the Manila driver-specific configuration file to your home directory:

    • Generic driver:

      sudo cp /usr/share/openstack-tripleo-heat-templates/environments/manila-generic-config.yaml ~
      
    • NetApp driver:

      sudo cp /usr/share/openstack-tripleo-heat-templates/environments/manila-netapp-config.yaml ~
      
  2. Edit the permissions (user is typically stack):

    sudo chown $USER ~/manila-*-config.yaml
    sudo chmod 755 ~/manila-*-config.yaml
    
  3. Edit the parameters in this file to fit your requirements.
    • If you’re using the generic driver, ensure that the service image details correspond to the service image you intend to load.

    • Ensure that the following line is changed:

      OS::TripleO::ControllerExtraConfigPre: /usr/share/openstack-tripleo-heat-templates/puppet/extraconfig/pre_deploy/controller/manila-[generic or netapp].yaml
      
  4. Continue following the TripleO instructions for deploying an overcloud. Before entering the command to deploy the overcloud, add the environment file that you just configured as an argument. For example:

    openstack overcloud deploy --templates \
      -e <full environment> -e ~/manila-[generic or netapp]-config.yaml
    
  5. Wait for the completion of the overcloud deployment process.

Creating the Share

Note

The following steps will refer to running commands as an admin user or a tenant user. Sourcing the overcloudrc file will authenticate you as the admin user. You can then create a tenant user and use environment files to switch between them.

  1. Upload a service image:

    Note

    This step is only required for the generic driver.

    Download a Manila service image to be used for share servers and upload it to Glance so that Manila can use it [tenant]:

    glance image-create --name manila-service-image --disk-format qcow2 --container-format bare --file manila_service_image.qcow2
    
  2. Create a share network to host the shares:

    • Create the overcloud networks. The Basic Deployment (CLI) doc has a more detailed explanation about creating the network and subnet. Note that you may also need to perform the following steps to get Manila working:

      neutron router-create router1
      neutron router-interface-add router1 [subnet id]
      
    • List the networks and subnets [tenant]:

      neutron net-list && neutron subnet-list
      
    • Create a share network (typically using the private default-net net/subnet) [tenant]:

      manila share-network-create --neutron-net-id [net] --neutron-subnet-id [subnet]
      
  3. Create a new share type (yes/no is for specifying if the driver handles share servers) [admin]:

    manila type-create [name] [yes/no]
    
  4. Create the share [tenant]:

    manila create --share-network [share net ID] --share-type [type name] [nfs/cifs] [size of share]
    

Accessing the Share

  1. To access the share, create a new VM on the same Neutron network that was used to create the share network:

    nova boot --image [image ID] --flavor [flavor ID] --nic net-id=[network ID] [name]
    
  2. Allow access to the VM you just created:

    manila access-allow [share ID] ip [IP address of VM]
    
  3. Run manila list and ensure that the share is available.

  4. Log into the VM:

    ssh [user]@[IP]
    

Note

You may need to configure Neutron security rules to access the VM. That is not in the scope of this document, so it will not be covered here.

  1. In the VM, execute:

    sudo mount [export location] [folder to mount to]
    
  2. Ensure the share is mounted by looking at the bottom of the output of the mount command.

  3. That’s it - you’re ready to start using Manila!

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