Provided by: swift-container_2.33.0-0ubuntu1_all 
NAME
container-server.conf - configuration file for the OpenStack Swift container server
SYNOPSIS
container-server.conf
DESCRIPTION
This is the configuration file used by the container server and other container background services, such
as; replicator, updater, auditor and sync.
The configuration file follows the python-pastedeploy syntax. The file is divided into sections, which
are enclosed by square brackets. Each section will contain a certain number of key/value parameters which
are described later.
Any line that begins with a '#' symbol is ignored.
You can find more information about python-pastedeploy configuration format at
https://docs.pylonsproject.org/projects/pastedeploy/en/latest/#config-format
GLOBAL SECTION
This is indicated by section named [DEFAULT]. Below are the parameters that are acceptable within this
section.
bind_ip
IP address the container server should bind to. The default is 0.0.0.0 which will make it bind to
all available addresses.
bind_port
TCP port the container server should bind to. The default is 6201.
keep_idle
Value to set for socket TCP_KEEPIDLE. The default value is 600.
bind_timeout
Timeout to bind socket. The default is 30.
backlog
TCP backlog. Maximum number of allowed pending connections. The default value is 4096.
workers
The number of pre-forked processes that will accept connections. Zero means no fork. The default
is auto which will make the server try to match the number of effective cpu cores if python
multiprocessing is available (included with most python distributions >= 2.6) or fallback to one.
It's worth noting that individual workers will use many eventlet co-routines to service multiple
concurrent requests.
max_clients
Maximum number of clients one worker can process simultaneously (it will actually accept(2) N +
1). Setting this to one (1) will only handle one request at a time, without accepting another
request concurrently. The default is 1024.
allowed_sync_hosts
This is a comma separated list of hosts allowed in the X-Container-Sync-To field for containers.
This is the old-style of using container sync. It is strongly recommended to use the new style of
a separate container-sync-realms.conf -- see container-sync-realms.conf-sample allowed_sync_hosts
= 127.0.0.1
user The system user that the container server will run as. The default is swift.
swift_dir
Swift configuration directory. The default is /etc/swift.
devices
Parent directory of where devices are mounted. Default is /srv/node.
mount_check
Whether or not check if the devices are mounted to prevent accidentally writing to the root
device. The default is set to true.
disable_fallocate
Disable pre-allocate disk space for a file. The default is false.
log_name
Label used when logging. The default is swift.
log_facility
Syslog log facility. The default is LOG_LOCAL0.
log_level
Logging level. The default is INFO.
log_address
Logging address. The default is /dev/log.
log_max_line_length
The following caps the length of log lines to the value given; no limit if set to 0, the default.
log_custom_handlers
Comma separated list of functions to call to setup custom log handlers. functions get passed:
conf, name, log_to_console, log_route, fmt, logger, adapted_logger. The default is empty.
log_udp_host
If set, log_udp_host will override log_address.
log_udp_port
UDP log port, the default is 514.
log_statsd_host
StatsD server. IPv4/IPv6 addresses and hostnames are supported. If a hostname resolves to an IPv4
and IPv6 address, the IPv4 address will be used.
log_statsd_port
The default is 8125.
log_statsd_default_sample_rate
The default is 1.
log_statsd_sample_rate_factor
The default is 1.
log_statsd_metric_prefix
The default is empty.
db_preallocation
If you don't mind the extra disk space usage in overhead, you can turn this on to preallocate disk
space with SQLite databases to decrease fragmentation. The default is false.
eventlet_debug
Debug mode for eventlet library. The default is false.
fallocate_reserve
You can set fallocate_reserve to the number of bytes or percentage of disk space you'd like
fallocate to reserve, whether there is space for the given file size or not. Percentage will be
used if the value ends with a '%'. The default is 1%.
nice_priority
Modify scheduling priority of server processes. Niceness values range from -20 (most favorable to
the process) to 19 (least favorable to the process). The default does not modify priority.
ionice_class
Modify I/O scheduling class of server processes. I/O niceness class values are IOPRIO_CLASS_RT
(realtime), IOPRIO_CLASS_BE (best-effort) and IOPRIO_CLASS_IDLE (idle). The default does not
modify class and priority. Work only with ionice_priority.
ionice_priority
Modify I/O scheduling priority of server processes. I/O niceness priority is a number which goes
from 0 to 7. The higher the value, the lower the I/O priority of the process. Work only with
ionice_class. Ignored if IOPRIO_CLASS_IDLE is set.
PIPELINE SECTION
This is indicated by section name [pipeline:main]. Below are the parameters that are acceptable within
this section.
pipeline
It is used when you need to apply a number of filters. It is a list of filters ended by an
application. The normal pipeline is "healthcheck recon container-server".
APP SECTION
This is indicated by section name [app:container-server]. Below are the parameters that are acceptable
within this section.
use Entry point for paste.deploy for the container server. This is the reference to the installed
python egg. This is normally egg:swift#container.
set log_name
Label used when logging. The default is container-server.
set log_facility
Syslog log facility. The default is LOG_LOCAL0.
set log_level
Logging level. The default is INFO.
set log_requests
Enables request logging. The default is True.
set log_address
Logging address. The default is /dev/log.
node_timeout
Request timeout to external services. The default is 3 seconds.
conn_timeout
Connection timeout to external services. The default is 0.5 seconds.
allow_versions
The default is false.
replication_server
Configure parameter for creating specific server. To handle all verbs, including replication
verbs, do not specify "replication_server" (this is the default). To only handle replication, set
to a True value (e.g. "True" or "1"). To handle only non-replication verbs, set to "False". Unless
you have a separate replication network, you should not specify any value for
"replication_server".
nice_priority
Modify scheduling priority of server processes. Niceness values range from -20 (most favorable to
the process) to 19 (least favorable to the process). The default does not modify priority.
ionice_class
Modify I/O scheduling class of server processes. I/O niceness class values are IOPRIO_CLASS_RT
(realtime), IOPRIO_CLASS_BE (best-effort) and IOPRIO_CLASS_IDLE (idle). The default does not
modify class and priority. Work only with ionice_priority.
ionice_priority
Modify I/O scheduling priority of server processes. I/O niceness priority is a number which goes
from 0 to 7. The higher the value, the lower the I/O priority of the process. Work only with
ionice_class. Ignored if IOPRIO_CLASS_IDLE is set.
FILTER SECTION
Any section that has its name prefixed by "filter:" indicates a filter section. Filters are used to
specify configuration parameters for specific swift middlewares. Below are the filters available and
respective acceptable parameters.
[filter:healthcheck]
use Entry point for paste.deploy for the healthcheck middleware. This is the reference to the
installed python egg. This is normally egg:swift#healthcheck.
disable_path
An optional filesystem path which, if present, will cause the healthcheck URL to return "503
Service Unavailable" with a body of "DISABLED BY FILE".
[filter:recon]
use Entry point for paste.deploy for the recon middleware. This is the reference to the installed
python egg. This is normally egg:swift#recon.
recon_cache_path
The recon_cache_path simply sets the directory where stats for a few items will be stored.
Depending on the method of deployment you may need to create this directory manually and ensure
that swift has read/write. The default is /var/cache/swift.
[filter:xprofile]
use Entry point for paste.deploy for the xprofile middleware. This is the reference to the
installed python egg. This is normally egg:swift#xprofile.
profile_module
This option enable you to switch profilers which should inherit from python standard profiler.
Currently the supported value can be 'cProfile', 'eventlet.green.profile' etc.
log_filename_prefix
This prefix will be used to combine process ID and timestamp to name the profile data file.
Make sure the executing user has permission to write into this path (missing path segments will
be created, if necessary). If you enable profiling in more than one type of daemon, you must
override it with an unique value like, the default is /var/log/swift/profile/account.profile.
dump_interval
The profile data will be dumped to local disk based on above naming rule in this interval. The
default is 5.0.
dump_timestamp
Be careful, this option will enable profiler to dump data into the file with time stamp which
means there will be lots of files piled up in the directory. The default is false
path This is the path of the URL to access the mini web UI. The default is __profile__.
flush_at_shutdown
Clear the data when the wsgi server shutdown. The default is false.
unwind Unwind the iterator of applications. Default is false.
ADDITIONAL SECTIONS
The following sections are used by other swift-container services, such as replicator, updater, auditor
and sync.
[container-replicator]
log_name
Label used when logging. The default is container-replicator.
log_facility
Syslog log facility. The default is LOG_LOCAL0.
log_level
Logging level. The default is INFO.
log_address
Logging address. The default is /dev/log.
per_diff
Maximum number of database rows that will be sync'd in a single HTTP replication request. The
default is 1000.
max_diffs
This caps how long the replicator will spend trying to sync a given database per pass so the
other databases don't get starved. The default is 100.
concurrency
Number of replication workers to spawn. The default is 8.
run_pause [deprecated]
Time in seconds to wait between replication passes. The default is 30.
interval
Replaces run_pause with the more standard "interval", which means the replicator won't pause
unless it takes less than the interval set. The default is 30.
node_timeout
Request timeout to external services. The default is 10 seconds.
conn_timeout
Connection timeout to external services. The default is 0.5 seconds.
reclaim_age
Time elapsed in seconds before an container can be reclaimed. The default is 604800 seconds.
rsync_compress
Allow rsync to compress data which is transmitted to destination node during sync. However,
this is applicable only when destination node is in a different region than the local one. The
default is false.
rsync_module
Format of the rsync module where the replicator will send data. See etc/rsyncd.conf-sample for
some usage examples.
recon_cache_path
Path to recon cache directory. The default is /var/cache/swift.
nice_priority
Modify scheduling priority of server processes. Niceness values range from -20 (most favorable
to the process) to 19 (least favorable to the process). The default does not modify priority.
ionice_class
Modify I/O scheduling class of server processes. I/O niceness class values are IOPRIO_CLASS_RT
(realtime), IOPRIO_CLASS_BE (best-effort) and IOPRIO_CLASS_IDLE (idle). The default does not
modify class and priority. Work only with ionice_priority.
ionice_priority
Modify I/O scheduling priority of server processes. I/O niceness priority is a number which
goes from 0 to 7. The higher the value, the lower the I/O priority of the process. Work only
with ionice_class. Ignored if IOPRIO_CLASS_IDLE is set.
[container-updater]
log_name
Label used when logging. The default is container-updater.
log_facility
Syslog log facility. The default is LOG_LOCAL0.
log_level
Logging level. The default is INFO.
log_address
Logging address. The default is /dev/log.
interval
Minimum time for a pass to take. The default is 300 seconds.
concurrency
Number of updater workers to spawn. The default is 4.
node_timeout
Request timeout to external services. The default is 3 seconds.
conn_timeout
Connection timeout to external services. The default is 0.5 seconds.
containers_per_second
Maximum containers updated per second. Should be tuned according to individual system specs. 0
is unlimited. The default is 50.
slowdown [deprecated]
Slowdown will sleep that amount between containers. The default is 0.01 seconds. Deprecated in
favor of containers_per_second
account_suppression_time
Seconds to suppress updating an account that has generated an error. The default is 60 seconds.
recon_cache_path
Path to recon cache directory. The default is /var/cache/swift.
nice_priority
Modify scheduling priority of server processes. Niceness values range from -20 (most favorable
to the process) to 19 (least favorable to the process). The default does not modify priority.
ionice_class
Modify I/O scheduling class of server processes. I/O niceness class values are IOPRIO_CLASS_RT
(realtime), IOPRIO_CLASS_BE (best-effort) and IOPRIO_CLASS_IDLE (idle). The default does not
modify class and priority. Work only with ionice_priority.
ionice_priority
Modify I/O scheduling priority of server processes. I/O niceness priority is a number which
goes from 0 to 7. The higher the value, the lower the I/O priority of the process. Work only
with ionice_class. Ignored if IOPRIO_CLASS_IDLE is set.
[container-auditor]
log_name
Label used when logging. The default is container-auditor.
log_facility
Syslog log facility. The default is LOG_LOCAL0.
log_level
Logging level. The default is INFO.
log_address
Logging address. The default is /dev/log.
interval
Will audit, at most, 1 container per device per interval. The default is 1800 seconds.
containers_per_second
Maximum containers audited per second. Should be tuned according to individual system specs. 0
is unlimited. The default is 200.
recon_cache_path
Path to recon cache directory. The default is /var/cache/swift.
nice_priority
Modify scheduling priority of server processes. Niceness values range from -20 (most favorable
to the process) to 19 (least favorable to the process). The default does not modify priority.
ionice_class
Modify I/O scheduling class of server processes. I/O niceness class values are IOPRIO_CLASS_RT
(realtime), IOPRIO_CLASS_BE (best-effort) and IOPRIO_CLASS_IDLE (idle). The default does not
modify class and priority. Work only with ionice_priority.
ionice_priority
Modify I/O scheduling priority of server processes. I/O niceness priority is a number which
goes from 0 to 7. The higher the value, the lower the I/O priority of the process. Work only
with ionice_class. Ignored if IOPRIO_CLASS_IDLE is set.
[container-sync]
log_name
Label used when logging. The default is container-sync.
log_facility
Syslog log facility. The default is LOG_LOCAL0.
log_level
Logging level. The default is INFO.
log_address
Logging address. The default is /dev/log.
sync_proxy
If you need to use an HTTP Proxy, set it here; defaults to no proxy.
interval
Will audit, at most, each container once per interval. The default is 300 seconds.
container_time
Maximum amount of time to spend syncing each container per pass. The default is 60 seconds.
conn_timeout
Connection timeout to external services. The default is 5 seconds.
request_tries
Server errors from requests will be retried by default. The default is 3.
internal_client_conf_path
Internal client config file path.
nice_priority
Modify scheduling priority of server processes. Niceness values range from -20 (most favorable
to the process) to 19 (least favorable to the process). The default does not modify priority.
ionice_class
Modify I/O scheduling class of server processes. I/O niceness class values are IOPRIO_CLASS_RT
(realtime), IOPRIO_CLASS_BE (best-effort) and IOPRIO_CLASS_IDLE (idle). The default does not
modify class and priority. Work only with ionice_priority.
ionice_priority
Modify I/O scheduling priority of server processes. I/O niceness priority is a number which
goes from 0 to 7. The higher the value, the lower the I/O priority of the process. Work only
with ionice_class. Ignored if IOPRIO_CLASS_IDLE is set.
DOCUMENTATION
More in depth documentation about the swift-container-server and also OpenStack Swift as a whole can be
found at https://docs.openstack.org/swift/latest/admin_guide.html and
https://docs.openstack.org/swift/latest/
SEE ALSO
swift-container-server(1)
Linux 8/26/2011 container-server.conf(5)