openstack-ansible/doc/source/install-guide/configure-swift-config.rst

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Configuring the service

Procedure 5.2. Updating the Object Storage configuration ``swift.yml`` file

1. Copy the /etc/openstack_deploy/conf.d/swift.yml.example file to /etc/openstack_deploy/conf.d/swift.yml:

   #cp /etc/openstack_deploy/conf.d/swift.yml.example \
             /etc/openstack_deploy/conf.d/swift.yml

2. Update the global override values:

   # global_overrides:
   #   swift:
   #     part_power: 8
   #     weight: 100
   #     min_part_hours: 1
   #     repl_number: 3
   #     storage_network: 'br-storage'
   #     replication_network: 'br-repl'
   #     drives:
   #       - name: sdc
   #       - name: sdd
   #       - name: sde
   #       - name: sdf
   #     mount_point: /mnt
   #     account:
   #     container:
   #     storage_policies:
   #       - policy:
   #           name: gold
   #           index: 0
   #           default: True
   #       - policy:
   #           name: silver
   #           index: 1
   #           repl_number: 3
   #           deprecated: True

   part_power

   Set the partition power value based on the total amount of storage the entire ring will use.

   Multiply the maximum number of drives ever used with this Object Storage installation by 100 and round that value up to the closest power of two value. For example, a maximum of six drives, times 100, equals 600. The nearest power of two above 600 is two to the power of nine, so the partition power is nine. The partition power cannot be changed after the Object Storage rings are built.

   weight

   The default weight is 100. If the drives are different sizes, set the weight value to avoid uneven distribution of data. For example, a 1 TB disk would have a weight of 100, while a 2 TB drive would have a weight of 200.

   min_part_hours

   The default value is 1. Set the minimum partition hours to the amount of time to lock a partition's replicas after a partition has been moved. Moving multiple replicas at the same time might make data inaccessible. This value can be set separately in the swift, container, account, and policy sections with the value in lower sections superseding the value in the swift section.

   repl_number

   The default value is 3. Set the replication number to the number of replicas of each object. This value can be set separately in the swift, container, account, and policy sections with the value in the more granular sections superseding the value in the swift section.

   storage_network

   By default, the swift services will listen on the default management IP. Optionally, specify the interface of the storage network.

   If the storage_network is not set, but the storage_ips per host are set (or the storage_ip is not on the storage_network interface) the proxy server will not be able to connect to the storage services.

   replication_network

   Optionally, specify a dedicated replication network interface, so dedicated replication can be setup. If this value is not specified, no dedicated replication_network is set.

   As with the storage_network, if the repl_ip is not set on the replication_network interface, replication will not work properly.

   drives

   Set the default drives per host. This is useful when all hosts have the same drives. These can be overridden on a per host basis.

   mount_point

   Set the mount_point value to the location where the swift drives are mounted. For example, with a mount point of /mnt and a drive of sdc, a drive is mounted at /mnt/sdc on the swift_host. This can be overridden on a per-host basis.

   storage_policies

   Storage policies determine on which hardware data is stored, how the data is stored across that hardware, and in which region the data resides. Each storage policy must have an unique name and a unique index. There must be a storage policy with an index of 0 in the swift.yml file to use any legacy containers created before storage policies were instituted.

   default

   Set the default value to yes for at least one policy. This is the default storage policy for any non-legacy containers that are created.

   deprecated

   Set the deprecated value to yes to turn off storage policies.

   For account and container rings, min_part_hours and repl_number are the only values that can be set. Setting them in this section overrides the defaults for the specific ring.

3. Update the Object Storage proxy hosts values:

   # swift-proxy_hosts:
   #   infra-node1:
   #     ip: 192.0.2.1
   #   infra-node2:
   #     ip: 192.0.2.2
   #   infra-node3:
   #     ip: 192.0.2.3

   swift-proxy_hosts

   Set the IP address of the hosts that Ansible will connect to to deploy the swift-proxy containers. The swift-proxy_hosts value should match the infra nodes.

4. Update the Object Storage hosts values:

   # swift_hosts:
   #   swift-node1:
   #     ip: 192.0.2.4
   #     container_vars:
   #       swift_vars:
   #         zone: 0
   #   swift-node2:
   #     ip: 192.0.2.5
   #     container_vars:
   #       swift_vars:
   #         zone: 1
   #   swift-node3:
   #     ip: 192.0.2.6
   #     container_vars:
   #       swift_vars:
   #         zone: 2
   #   swift-node4:
   #     ip: 192.0.2.7
   #     container_vars:
   #       swift_vars:
   #         zone: 3
   #   swift-node5:
   #     ip: 192.0.2.8
   #     container_vars:
   #       swift_vars:
   #         storage_ip: 198.51.100.8
   #         repl_ip: 203.0.113.8
   #         zone: 4
   #         region: 3
   #         weight: 200
   #         groups:
   #           - account
   #           - container
   #           - silver
   #         drives:
   #           - name: sdb
   #             storage_ip: 198.51.100.9
   #             repl_ip: 203.0.113.9
   #             weight: 75
   #             groups:
   #               - gold
   #           - name: sdc
   #           - name: sdd
   #           - name: sde
   #           - name: sdf

   swift_hosts

   Specify the hosts to be used as the storage nodes. The ip is the address of the host to which Ansible connects. Set the name and IP address of each Object Storage host. The swift_hosts section is not required.

   swift_vars

   Contains the Object Storage host specific values.

   storage_ip and repl_ip

   These values are based on the IP addresses of the host's storage_network or replication_network. For example, if the storage_network is br-storage and host1 has an IP address of 1.1.1.1 on br-storage, then that is the IP address that will be used for storage_ip. If only the storage_ip is specified then the repl_ip defaults to the storage_ip. If neither are specified, both will default to the host IP address.

   Overriding these values on a host or drive basis can cause problems if the IP address that the service listens on is based on a specified storage_network or replication_network and the ring is set to a different IP address.

   zone

   The default is 0. Optionally, set the Object Storage zone for the ring.

   region

   Optionally, set the Object Storage region for the ring.

   weight

   The default weight is 100. If the drives are different sizes, set the weight value to avoid uneven distribution of data. This value can be specified on a host or drive basis (if specified at both, the drive setting takes precedence).

   groups

   Set the groups to list the rings to which a host's drive belongs. This can be set on a per drive basis which will override the host setting.

   drives

   Set the names of the drives on this Object Storage host. At least one name must be specified.

   weight

   The default weight is 100. If the drives are different sizes, set the weight value to avoid uneven distribution of data. This value can be specified on a host or drive basis (if specified at both, the drive setting takes precedence).

   In the following example, swift-node5 shows values in the swift_hosts section that will override the global values. Groups are set, which overrides the global settings for drive sdb. The weight is overridden for the host and specifically adjusted on drive sdb. Also, the storage_ip and repl_ip are set differently for sdb.

   #  swift-node5:
   #     ip: 192.0.2.8
   #     container_vars:
   #       swift_vars:
   #         storage_ip: 198.51.100.8
   #         repl_ip: 203.0.113.8
   #         zone: 4
   #         region: 3
   #         weight: 200
   #         groups:
   #           - account
   #           - container
   #           - silver
   #         drives:
   #           - name: sdb
   #             storage_ip: 198.51.100.9
   #             repl_ip: 203.0.113.9
   #             weight: 75
   #             groups:
   #               - gold
   #           - name: sdc
   #           - name: sdd
   #           - name: sde
   #           - name: sdf

5. Ensure the swift.yml is in the /etc/rpc_deploy/conf.d/ folder.

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