.. _Dedicated-replication-network: ============================= Dedicated replication network ============================= ------- Summary ------- Swift's replication process is essential for consistency and availability of data. By default, replication activity will use the same network interface as other cluster operations. However, if a replication interface is set in the ring for a node, that node will send replication traffic on its designated separate replication network interface. Replication traffic includes REPLICATE requests and rsync traffic. To separate the cluster-internal replication traffic from client traffic, separate replication servers can be used. These replication servers are based on the standard storage servers, but they listen on the replication IP and only respond to REPLICATE requests. Storage servers can serve REPLICATE requests, so an operator can transition to using a separate replication network with no cluster downtime. Replication IP and port information is stored in the ring on a per-node basis. These parameters will be used if they are present, but they are not required. If this information does not exist or is empty for a particular node, the node's standard IP and port will be used for replication. -------------------- For SAIO replication -------------------- #. Create new script in ``~/bin/`` (for example: ``remakerings_new``):: #!/bin/bash set -e cd /etc/swift rm -f *.builder *.ring.gz backups/*.builder backups/*.ring.gz swift-ring-builder object.builder create 10 3 1 swift-ring-builder object.builder add z1-127.0.0.1:6210R127.0.0.1:6250/sdb1 1 swift-ring-builder object.builder add z2-127.0.0.1:6220R127.0.0.1:6260/sdb2 1 swift-ring-builder object.builder add z3-127.0.0.1:6230R127.0.0.1:6270/sdb3 1 swift-ring-builder object.builder add z4-127.0.0.1:6240R127.0.0.1:6280/sdb4 1 swift-ring-builder object.builder rebalance swift-ring-builder object-1.builder create 10 2 1 swift-ring-builder object-1.builder add z1-127.0.0.1:6210R127.0.0.1:6250/sdb1 1 swift-ring-builder object-1.builder add z2-127.0.0.1:6220R127.0.0.1:6260/sdb2 1 swift-ring-builder object-1.builder add z3-127.0.0.1:6230R127.0.0.1:6270/sdb3 1 swift-ring-builder object-1.builder add z4-127.0.0.1:6240R127.0.0.1:6280/sdb4 1 swift-ring-builder object-1.builder rebalance swift-ring-builder object-2.builder create 10 6 1 swift-ring-builder object-2.builder add z1-127.0.0.1:6210R127.0.0.1:6250/sdb1 1 swift-ring-builder object-2.builder add z1-127.0.0.1:6210R127.0.0.1:6250/sdb5 1 swift-ring-builder object-2.builder add z2-127.0.0.1:6220R127.0.0.1:6260/sdb2 1 swift-ring-builder object-2.builder add z2-127.0.0.1:6220R127.0.0.1:6260/sdb6 1 swift-ring-builder object-2.builder add z3-127.0.0.1:6230R127.0.0.1:6270/sdb3 1 swift-ring-builder object-2.builder add z3-127.0.0.1:6230R127.0.0.1:6270/sdb7 1 swift-ring-builder object-2.builder add z4-127.0.0.1:6240R127.0.0.1:6280/sdb4 1 swift-ring-builder object-2.builder add z4-127.0.0.1:6240R127.0.0.1:6280/sdb8 1 swift-ring-builder object-2.builder rebalance swift-ring-builder container.builder create 10 3 1 swift-ring-builder container.builder add z1-127.0.0.1:6211R127.0.0.1:6251/sdb1 1 swift-ring-builder container.builder add z2-127.0.0.1:6221R127.0.0.1:6261/sdb2 1 swift-ring-builder container.builder add z3-127.0.0.1:6231R127.0.0.1:6271/sdb3 1 swift-ring-builder container.builder add z4-127.0.0.1:6241R127.0.0.1:6281/sdb4 1 swift-ring-builder container.builder rebalance swift-ring-builder account.builder create 10 3 1 swift-ring-builder account.builder add z1-127.0.0.1:6212R127.0.0.1:6252/sdb1 1 swift-ring-builder account.builder add z2-127.0.0.1:6222R127.0.0.1:6262/sdb2 1 swift-ring-builder account.builder add z3-127.0.0.1:6232R127.0.0.1:6272/sdb3 1 swift-ring-builder account.builder add z4-127.0.0.1:6242R127.0.0.1:6282/sdb4 1 swift-ring-builder account.builder rebalance .. note:: Syntax of adding device has been changed: ``R:`` was added between ``z-:`` and ``/_ ``. Added devices will use and for replication activities. #. Add next rows in ``/etc/rsyncd.conf``:: [account6252] max connections = 25 path = /srv/1/node/ read only = false lock file = /var/lock/account6252.lock [account6262] max connections = 25 path = /srv/2/node/ read only = false lock file = /var/lock/account6262.lock [account6272] max connections = 25 path = /srv/3/node/ read only = false lock file = /var/lock/account6272.lock [account6282] max connections = 25 path = /srv/4/node/ read only = false lock file = /var/lock/account6282.lock [container6251] max connections = 25 path = /srv/1/node/ read only = false lock file = /var/lock/container6251.lock [container6261] max connections = 25 path = /srv/2/node/ read only = false lock file = /var/lock/container6261.lock [container6271] max connections = 25 path = /srv/3/node/ read only = false lock file = /var/lock/container6271.lock [container6281] max connections = 25 path = /srv/4/node/ read only = false lock file = /var/lock/container6281.lock [object6250] max connections = 25 path = /srv/1/node/ read only = false lock file = /var/lock/object6250.lock [object6260] max connections = 25 path = /srv/2/node/ read only = false lock file = /var/lock/object6260.lock [object6270] max connections = 25 path = /srv/3/node/ read only = false lock file = /var/lock/object6270.lock [object6280] max connections = 25 path = /srv/4/node/ read only = false lock file = /var/lock/object6280.lock #. Restart rsync daemon:: service rsync restart #. Update configuration files in directories: * /etc/swift/object-server(files: 1.conf, 2.conf, 3.conf, 4.conf) * /etc/swift/container-server(files: 1.conf, 2.conf, 3.conf, 4.conf) * /etc/swift/account-server(files: 1.conf, 2.conf, 3.conf, 4.conf) delete all configuration options in section ``[<*>-replicator]`` #. Add configuration files for object-server, in ``/etc/swift/object-server/`` * 5.conf:: [DEFAULT] devices = /srv/1/node mount_check = false disable_fallocate = true bind_port = 6250 user = swift log_facility = LOG_LOCAL2 recon_cache_path = /var/cache/swift [pipeline:main] pipeline = recon object-server [app:object-server] use = egg:swift#object replication_server = True [filter:recon] use = egg:swift#recon [object-replicator] rsync_module = {replication_ip}::object{replication_port} * 6.conf:: [DEFAULT] devices = /srv/2/node mount_check = false disable_fallocate = true bind_port = 6260 user = swift log_facility = LOG_LOCAL3 recon_cache_path = /var/cache/swift2 [pipeline:main] pipeline = recon object-server [app:object-server] use = egg:swift#object replication_server = True [filter:recon] use = egg:swift#recon [object-replicator] rsync_module = {replication_ip}::object{replication_port} * 7.conf:: [DEFAULT] devices = /srv/3/node mount_check = false disable_fallocate = true bind_port = 6270 user = swift log_facility = LOG_LOCAL4 recon_cache_path = /var/cache/swift3 [pipeline:main] pipeline = recon object-server [app:object-server] use = egg:swift#object replication_server = True [filter:recon] use = egg:swift#recon [object-replicator] rsync_module = {replication_ip}::object{replication_port} * 8.conf:: [DEFAULT] devices = /srv/4/node mount_check = false disable_fallocate = true bind_port = 6280 user = swift log_facility = LOG_LOCAL5 recon_cache_path = /var/cache/swift4 [pipeline:main] pipeline = recon object-server [app:object-server] use = egg:swift#object replication_server = True [filter:recon] use = egg:swift#recon [object-replicator] rsync_module = {replication_ip}::object{replication_port} #. Add configuration files for container-server, in ``/etc/swift/container-server/`` * 5.conf:: [DEFAULT] devices = /srv/1/node mount_check = false disable_fallocate = true bind_port = 6251 user = swift log_facility = LOG_LOCAL2 recon_cache_path = /var/cache/swift [pipeline:main] pipeline = recon container-server [app:container-server] use = egg:swift#container replication_server = True [filter:recon] use = egg:swift#recon [container-replicator] rsync_module = {replication_ip}::container{replication_port} * 6.conf:: [DEFAULT] devices = /srv/2/node mount_check = false disable_fallocate = true bind_port = 6261 user = swift log_facility = LOG_LOCAL3 recon_cache_path = /var/cache/swift2 [pipeline:main] pipeline = recon container-server [app:container-server] use = egg:swift#container replication_server = True [filter:recon] use = egg:swift#recon [container-replicator] rsync_module = {replication_ip}::container{replication_port} * 7.conf:: [DEFAULT] devices = /srv/3/node mount_check = false disable_fallocate = true bind_port = 6271 user = swift log_facility = LOG_LOCAL4 recon_cache_path = /var/cache/swift3 [pipeline:main] pipeline = recon container-server [app:container-server] use = egg:swift#container replication_server = True [filter:recon] use = egg:swift#recon [container-replicator] rsync_module = {replication_ip}::container{replication_port} * 8.conf:: [DEFAULT] devices = /srv/4/node mount_check = false disable_fallocate = true bind_port = 6281 user = swift log_facility = LOG_LOCAL5 recon_cache_path = /var/cache/swift4 [pipeline:main] pipeline = recon container-server [app:container-server] use = egg:swift#container replication_server = True [filter:recon] use = egg:swift#recon [container-replicator] rsync_module = {replication_ip}::container{replication_port} #. Add configuration files for account-server, in ``/etc/swift/account-server/`` * 5.conf:: [DEFAULT] devices = /srv/1/node mount_check = false disable_fallocate = true bind_port = 6252 user = swift log_facility = LOG_LOCAL2 recon_cache_path = /var/cache/swift [pipeline:main] pipeline = recon account-server [app:account-server] use = egg:swift#account replication_server = True [filter:recon] use = egg:swift#recon [account-replicator] rsync_module = {replication_ip}::account{replication_port} * 6.conf:: [DEFAULT] devices = /srv/2/node mount_check = false disable_fallocate = true bind_port = 6262 user = swift log_facility = LOG_LOCAL3 recon_cache_path = /var/cache/swift2 [pipeline:main] pipeline = recon account-server [app:account-server] use = egg:swift#account replication_server = True [filter:recon] use = egg:swift#recon [account-replicator] rsync_module = {replication_ip}::account{replication_port} * 7.conf:: [DEFAULT] devices = /srv/3/node mount_check = false disable_fallocate = true bind_port = 6272 user = swift log_facility = LOG_LOCAL4 recon_cache_path = /var/cache/swift3 [pipeline:main] pipeline = recon account-server [app:account-server] use = egg:swift#account replication_server = True [filter:recon] use = egg:swift#recon [account-replicator] rsync_module = {replication_ip}::account{replication_port} * 8.conf:: [DEFAULT] devices = /srv/4/node mount_check = false disable_fallocate = true bind_port = 6282 user = swift log_facility = LOG_LOCAL5 recon_cache_path = /var/cache/swift4 [pipeline:main] pipeline = recon account-server [app:account-server] use = egg:swift#account replication_server = True [filter:recon] use = egg:swift#recon [account-replicator] rsync_module = {replication_ip}::account{replication_port} --------------------------------- For a Multiple Server replication --------------------------------- #. Move configuration file. * Configuration file for object-server from /etc/swift/object-server.conf to /etc/swift/object-server/1.conf * Configuration file for container-server from /etc/swift/container-server.conf to /etc/swift/container-server/1.conf * Configuration file for account-server from /etc/swift/account-server.conf to /etc/swift/account-server/1.conf #. Add changes in configuration files in directories: * /etc/swift/object-server(files: 1.conf) * /etc/swift/container-server(files: 1.conf) * /etc/swift/account-server(files: 1.conf) delete all configuration options in section [<*>-replicator] #. Add configuration files for object-server, in /etc/swift/object-server/2.conf:: [DEFAULT] bind_ip = $STORAGE_LOCAL_NET_IP workers = 2 [pipeline:main] pipeline = object-server [app:object-server] use = egg:swift#object replication_server = True [object-replicator] #. Add configuration files for container-server, in /etc/swift/container-server/2.conf:: [DEFAULT] bind_ip = $STORAGE_LOCAL_NET_IP workers = 2 [pipeline:main] pipeline = container-server [app:container-server] use = egg:swift#container replication_server = True [container-replicator] #. Add configuration files for account-server, in /etc/swift/account-server/2.conf:: [DEFAULT] bind_ip = $STORAGE_LOCAL_NET_IP workers = 2 [pipeline:main] pipeline = account-server [app:account-server] use = egg:swift#account replication_server = True [account-replicator]