openstack/swift
Code Issues Proposed changes
cc27780042
swift/doc/source/replication_network.rst
Tim Burke 314347a3cb Update SAIO & docker image to use 62xx ports 
Note that existing SAIOs with 60xx ports should still work fine.

Change-Id: If5dd79f926fa51a58b3a732b212b484a7e9f00db
Related-Change: Ie1c778b159792c8e259e2a54cb86051686ac9d18
2020-07-20 15:17:12 -07:00

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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

  1. 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<ip_replication>:<port_replication> was added between z<zone>-<ip>:<port> and /<device_name>_<meta> <weight>. Added devices will use <ip_replication> and <port_replication> for replication activities.

  2. 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

  3. Restart rsync daemon:

    service rsync restart

  4. 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]

  5. 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}

  6. 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}

  7. 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

  1. 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

  2. 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]

  3. 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]

  4. 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]

  5. 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]