Man pages sections > man5 > proxy-server

proxy-server.conf - configuration file for the OpenStack Swift proxy

proxy-server.conf(5) OpenStack Swift proxy-server.conf(5)

NAME

proxy-server.conf - configuration file for the OpenStack Swift proxy server
 
 
 

SYNOPSIS

proxy-server.conf
 
 
 

DESCRIPTION

This is the configuration file used by the proxy server and other proxy middlewares.
 
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 http://pythonpaste.org/deploy/#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 proxy 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 proxy server should bind to. The default is 80.
bind_timeout
Timeout to bind socket. The default is 30.
backlog
TCP backlog. Maximum number of allowed pending connections. The default value is 4096.
admin_key
Key to use for admin calls that are HMAC signed. Default is empty, which will disable admin calls to /info.
disallowed_sections
Allows the ability to withhold sections from showing up in the public calls to /info. You can withhold subsections by separating the dict level with a ".". The following would cause the sections 'container_quotas' and 'tempurl' to not be listed, and the key max_failed_deletes would be removed from bulk_delete. Default value is 'swift.valid_api_versions' which allows all registered features to be listed via HTTP GET /info except swift.valid_api_versions information
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.
user
The system user that the proxy server will run as. The default is swift.
expose_info
Enables exposing configuration settings via HTTP GET /info. The default is true.
swift_dir
Swift configuration directory. The default is /etc/swift.
cert_file
Location of the SSL certificate file. The default path is /etc/swift/proxy.crt. This is disabled by default.
key_file
Location of the SSL certificate key file. The default path is /etc/swift/proxy.key. This is disabled by default.
expiring_objects_container_divisor
The default is 86400.
expiring_objects_account_name
The default is 'expiring_objects'.
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
To cap the length of log lines to the value given. No limit if set to 0, the default.
log_headers
The default is false.
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.
client_timeout
Time to wait while receiving each chunk of data from a client or another backend node. The default is 60.
eventlet_debug
Debug mode for eventlet library. The default is false.
trans_id_suffix
This optional suffix (default is empty) that would be appended to the swift transaction id allows one to easily figure out from which cluster that X-Trans-Id belongs to. This is very useful when one is managing more than one swift cluster.
cors_allow_origin
Use a comma separated list of full url (http://foo.bar:1234,https://foo.bar)
strict_cors_mode
The default is true.
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 apply a number of filters. It is a list of filters ended by an application. The normal pipeline is "catch_errors gatekeeper healthcheck proxy-logging cache container_sync bulk tempurl ratelimit tempauth container-quotas account-quotas slo dlo versioned_writes proxy-logging proxy-server".
 
Note: The double proxy-logging in the pipeline is not a mistake. The left-most proxy-logging is there to log requests that were handled in middleware and never made it through to the right-most middleware (and proxy server). Double logging is prevented for normal requests. See proxy-logging docs.
 
 
 

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:tempauth]
use
Entry point for paste.deploy for the tempauth middleware. This is the reference to the installed python egg. This is normally egg:swift#tempauth.
set log_name
Label used when logging. The default is tempauth.
set log_facility
Syslog log facility. The default is LOG_LOCAL0.
set log_level
Logging level. The default is INFO.
set log_address
Logging address. The default is /dev/log.
set log_headers
Enables the ability to log request headers. The default is False.
reseller_prefix
The reseller prefix will verify a token begins with this prefix before even attempting to validate it. Also, with authorization, only Swift storage accounts with this prefix will be authorized by this middleware. Useful if multiple auth systems are in use for one Swift cluster. The default is AUTH.
auth_prefix
The auth prefix will cause requests beginning with this prefix to be routed to the auth subsystem, for granting tokens, etc. The default is /auth/.
require_group
The require_group parameter names a group that must be presented by either X-Auth-Token or X-Service-Token. Usually this parameter is used only with multiple reseller prefixes (e.g., SERVICE_require_group=blah). By default, no group is needed. Do not use .admin.
token_life
This is the time in seconds before the token expires. The default is 86400.
allow_overrides
This allows middleware higher in the WSGI pipeline to override auth processing, useful for middleware such as tempurl and formpost. If you know you're not going to use such middleware and you want a bit of extra security, you can set this to false. The default is true.
storage_url_scheme
This specifies what scheme to return with storage urls: http, https, or default (chooses based on what the server is running as) This can be useful with an SSL load balancer in front of a non-SSL server.
user_<account>_<user>
Lastly, you need to list all the accounts/users you want here. The format is: user_<account>_<user> = <key> [group] [group] [...] [storage_url] or if you want underscores in <account> or <user>, you can base64 encode them (with no equal signs) and use this format: user64_<account_b64>_<user_b64> = <key> [group] [group] [...] [storage_url]
 
There are special groups of: .reseller_admin who can do anything to any account for this auth and also .admin who can do anything within the account.
 
If neither of these groups are specified, the user can only access containers that have been explicitly allowed for them by a .admin or .reseller_admin. The trailing optional storage_url allows you to specify an alternate url to hand back to the user upon authentication. If not specified, this defaults to http[s]://<ip>:<port>/v1/<reseller_prefix>_<account> where http or https depends on whether cert_file is specified in the [DEFAULT] section, <ip> and <port> are based on the [DEFAULT] section's bind_ip and bind_port (falling back to 127.0.0.1 and 8080), <reseller_prefix> is from this section, and <account> is from the user_<account>_<user> name.
 
Here are example entries, required for running the tests:
 
user_admin_admin = admin .admin .reseller_admin
user_test_tester = testing .admin
user_test2_tester2 = testing2 .admin
user_test_tester3 = testing3
 
[filter:authtoken]
 
To enable Keystone authentication you need to have the auth token middleware first to be configured. Here is an example below, please refer to the keystone's documentation for details about the different settings.
 
You'll need to have as well the keystoneauth middleware enabled and have it in your main pipeline so instead of having tempauth in there you can change it to: authtoken keystoneauth
 
paste.filter_factory = keystonemiddleware.auth_token:filter_factory
auth_uri = http://keystonehost:5000
auth_url = http://keystonehost:35357
auth_plugin = password
project_domain_id = default
user_domain_id = default
project_name = service
username = swift
password = password
# delay_auth_decision defaults to False, but leaving it as false will
# prevent other auth systems, staticweb, tempurl, formpost, and ACLs from
# working. This value must be explicitly set to True.
delay_auth_decision = False
cache = swift.cache
include_service_catalog = False
 
 
[filter:keystoneauth]
 
Keystone authentication middleware.
 
use
Entry point for paste.deploy for the keystoneauth middleware. This is the reference to the installed python egg. This is normally egg:swift#keystoneauth.
reseller_prefix
The reseller_prefix option lists account namespaces that this middleware is responsible for. The prefix is placed before the Keystone project id. For example, for project 12345678, and prefix AUTH, the account is named AUTH_12345678 (i.e., path is /v1/AUTH_12345678/...). Several prefixes are allowed by specifying a comma-separated list as in: "reseller_prefix = AUTH, SERVICE". The empty string indicates a single blank/empty prefix. If an empty prefix is required in a list of prefixes, a value of '' (two single quote characters) indicates a blank/empty prefix. Except for the blank/empty prefix, an underscore ('_') character is appended to the value unless already present.
operator_roles
The user must have at least one role named by operator_roles on a project in order to create, delete and modify containers and objects and to set and read privileged headers such as ACLs. If there are several reseller prefix items, you can prefix the parameter so it applies only to those accounts (for example the parameter SERVICE_operator_roles applies to the /v1/SERVICE_<project> path). If you omit the prefix, the option applies to all reseller prefix items. For the blank/empty prefix, prefix with '' (do not put underscore after the two single quote characters).
reseller_admin_role
The reseller admin role has the ability to create and delete accounts.
allow_overrides
This allows middleware higher in the WSGI pipeline to override auth processing, useful for middleware such as tempurl and formpost. If you know you're not going to use such middleware and you want a bit of extra security, you can set this to false.
service_roles
If the service_roles parameter is present, an X-Service-Token must be present in the request that when validated, grants at least one role listed in the parameter. The X-Service-Token may be scoped to any project. If there are several reseller prefix items, you can prefix the parameter so it applies only to those accounts (for example the parameter SERVICE_service_roles applies to the /v1/SERVICE_<project> path). If you omit the prefix, the option applies to all reseller prefix items. For the blank/empty prefix, prefix with '' (do not put underscore after the two single quote characters). By default, no service_roles are required.
default_domain_id
For backwards compatibility, keystoneauth will match names in cross-tenant access control lists (ACLs) when both the requesting user and the tenant are in the default domain i.e the domain to which existing tenants are migrated. The default_domain_id value configured here should be the same as the value used during migration of tenants to keystone domains.
allow_names_in_acls
For a new installation, or an installation in which keystone projects may move between domains, you should disable backwards compatible name matching in ACLs by setting allow_names_in_acls to false:
 
 
[filter:cache]
 
Caching middleware that manages caching in swift.
 
use
Entry point for paste.deploy for the memcache middleware. This is the reference to the installed python egg. This is normally egg:swift#memcache.
set log_name
Label used when logging. The default is memcache.
set log_facility
Syslog log facility. The default is LOG_LOCAL0.
set log_level
Logging level. The default is INFO.
set log_address
Logging address. The default is /dev/log.
set log_headers
Enables the ability to log request headers. The default is False.
memcache_max_connections
Sets the maximum number of connections to each memcached server per worker.
memcache_servers
If not set in the configuration file, the value for memcache_servers will be read from /etc/swift/memcache.conf (see memcache.conf-sample) or lacking that file, it will default to 127.0.0.1:11211. You can specify multiple servers separated with commas, as in: 10.1.2.3:11211,10.1.2.4:11211. (IPv6 addresses must follow rfc3986 section-3.2.2, i.e. [::1]:11211)
memcache_serialization_support
This sets how memcache values are serialized and deserialized:
 
0 = older, insecure pickle serialization
1 = json serialization but pickles can still be read (still insecure)
2 = json serialization only (secure and the default)
 
To avoid an instant full cache flush, existing installations should upgrade with 0, then set to 1 and reload, then after some time (24 hours) set to 2 and reload. In the future, the ability to use pickle serialization will be removed.
 
If not set in the configuration file, the value for memcache_serialization_support will be read from /etc/swift/memcache.conf if it exists (see memcache.conf-sample). Otherwise, the default value as indicated above will be used.
 
 
[filter:ratelimit]
 
Rate limits requests on both an Account and Container level. Limits are configurable.
 
use
Entry point for paste.deploy for the ratelimit middleware. This is the reference to the installed python egg. This is normally egg:swift#ratelimit.
set log_name
Label used when logging. The default is ratelimit.
set log_facility
Syslog log facility. The default is LOG_LOCAL0.
set log_level
Logging level. The default is INFO.
set log_address
Logging address. The default is /dev/log.
set log_headers
Enables the ability to log request headers. The default is False.
clock_accuracy
This should represent how accurate the proxy servers' system clocks are with each other. 1000 means that all the proxies' clock are accurate to each other within 1 millisecond. No ratelimit should be higher than the clock accuracy. The default is 1000.
max_sleep_time_seconds
App will immediately return a 498 response if the necessary sleep time ever exceeds the given max_sleep_time_seconds. The default is 60 seconds.
log_sleep_time_seconds
To allow visibility into rate limiting set this value > 0 and all sleeps greater than the number will be logged. If set to 0 means disabled. The default is 0.
rate_buffer_seconds
Number of seconds the rate counter can drop and be allowed to catch up (at a faster than listed rate). A larger number will result in larger spikes in rate but better average accuracy. The default is 5.
account_ratelimit
If set, will limit PUT and DELETE requests to /account_name/container_name. Number is in requests per second. If set to 0 means disabled. The default is 0.
container_ratelimit_size
When set with container_limit_x = r: for containers of size x, limit requests per second to r. Will limit PUT, DELETE, and POST requests to /a/c/o. The default is ''.
container_listing_ratelimit_size
Similarly to the above container-level write limits, the following will limit container GET (listing) requests.
 
 
 
[filter:domain_remap]
 
Middleware that translates container and account parts of a domain to path parameters that the proxy server understands. The container.account.storageurl/object gets translated to container.account.storageurl/path_root/account/container/object and account.storageurl/path_root/container/object gets translated to account.storageurl/path_root/account/container/object
 
use
Entry point for paste.deploy for the domain_remap middleware. This is the reference to the installed python egg. This is normally egg:swift#domain_remap.
set log_name
Label used when logging. The default is domain_remap.
set log_facility
Syslog log facility. The default is LOG_LOCAL0.
set log_level
Logging level. The default is INFO.
set log_address
Logging address. The default is /dev/log.
set log_headers
Enables the ability to log request headers. The default is False.
storage_domain
The domain to be used by the middleware.
path_root
The path root value for the storage URL. The default is v1.
reseller_prefixes
Browsers can convert a host header to lowercase, so check that reseller prefix on the account is the correct case. This is done by comparing the items in the reseller_prefixes config option to the found prefix. If they match except for case, the item from reseller_prefixes will be used instead of the found reseller prefix. When none match, the default reseller prefix is used. When no default reseller prefix is configured, any request with an account prefix not in that list will be ignored by this middleware. Defaults to 'AUTH'.
default_reseller_prefix
The default reseller prefix. This is used when none of the configured reseller_prefixes match. When not set, no reseller prefix is added.
 
 
[filter:catch_errors]
use
Entry point for paste.deploy for the catch_errors middleware. This is the reference to the installed python egg. This is normally egg:swift#catch_errors.
set log_name
Label used when logging. The default is catch_errors.
set log_facility
Syslog log facility. The default is LOG_LOCAL0.
set log_level
Logging level. The default is INFO.
set log_address
Logging address. The default is /dev/log.
set log_headers
Enables the ability to log request headers. The default is False.
 
 
[filter:cname_lookup]
 
Note: this middleware requires python-dnspython
 
use
Entry point for paste.deploy for the cname_lookup middleware. This is the reference to the installed python egg. This is normally egg:swift#cname_lookup.
set log_name
Label used when logging. The default is cname_lookup.
set log_facility
Syslog log facility. The default is LOG_LOCAL0.
set log_level
Logging level. The default is INFO.
set log_address
Logging address. The default is /dev/log.
set log_headers
Enables the ability to log request headers. The default is False.
storage_domain
The domain to be used by the middleware.
lookup_depth
How deep in the CNAME chain to look for something that matches the storage domain. The default is 1.
 
 
[filter:staticweb]
 
Note: Put staticweb just after your auth filter(s) in the pipeline
 
use
Entry point for paste.deploy for the staticweb middleware. This is the reference to the installed python egg. This is normally egg:swift#staticweb.
set log_name
Label used when logging. The default is staticweb.
set log_facility
Syslog log facility. The default is LOG_LOCAL0.
set log_level
Logging level. The default is INFO.
set log_address
Logging address. The default is /dev/log.
set log_headers
Enables the ability to log request headers. The default is False.
 
 
[filter:tempurl]
 
Note: Put tempurl before slo, dlo, and your auth filter(s) in the pipeline
 
use
Entry point for paste.deploy for the tempurl middleware. This is the reference to the installed python egg. This is normally egg:swift#tempurl.
methods
The methods allowed with Temp URLs. The default is 'GET HEAD PUT POST DELETE'.
incoming_remove_headers
The headers to remove from incoming requests. Simply a whitespace delimited list of header names and names can optionally end with '*' to indicate a prefix match. incoming_allow_headers is a list of exceptions to these removals.
incoming_allow_headers
The headers allowed as exceptions to incoming_remove_headers. Simply a whitespace delimited list of header names and names can optionally end with '*' to indicate a prefix match.
outgoing_remove_headers
The headers to remove from outgoing responses. Simply a whitespace delimited list of header names and names can optionally end with '*' to indicate a prefix match. outgoing_allow_headers is a list of exceptions to these removals.
outgoing_allow_headers
The headers allowed as exceptions to outgoing_remove_headers. Simply a whitespace delimited list of header names and names can optionally end with '*' to indicate a prefix match.
 
 
[filter:formpost]
 
Note: Put formpost just before your auth filter(s) in the pipeline
 
use
Entry point for paste.deploy for the formpost middleware. This is the reference to the installed python egg. This is normally egg:swift#formpost.
 
 
 
[filter:name_check]
 
Note: Just needs to be placed before the proxy-server in the pipeline.
 
use
Entry point for paste.deploy for the name_check middleware. This is the reference to the installed python egg. This is normally egg:swift#name_check.
forbidden_chars
Characters that will not be allowed in a name. The default is '"`<>.
maximum_length
Maximum number of characters that can be in the name. The default is 255.
forbidden_regexp
Python regular expressions of substrings that will not be allowed in a name. The default is /./|/../|/.$|/..$.
 
 
[filter:list-endpoints]
use
Entry point for paste.deploy for the list_endpoints middleware. This is the reference to the installed python egg. This is normally egg:swift#list_endpoints.
list_endpoints_path
The default is '/endpoints/'.
 
 
[filter:proxy-logging]
 
Logging for the proxy server now lives in this middleware. If the access_* variables are not set, logging directives from [DEFAULT] without "access_" will be used.
 
use
Entry point for paste.deploy for the proxy_logging middleware. This is the reference to the installed python egg. This is normally egg:swift#proxy_logging.
access_log_name
Label used when logging. The default is proxy-server.
access_log_facility
Syslog log facility. The default is LOG_LOCAL0.
access_log_level
Logging level. The default is INFO.
access_log_address
Default is /dev/log.
access_log_udp_host
If set, access_log_udp_host will override access_log_address. Default is unset.
access_log_udp_port
Default is 514.
access_log_statsd_host
You can use log_statsd_* from [DEFAULT], or override them here. 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.
access_log_statsd_port
Default is 8125.
access_log_statsd_default_sample_rate
Default is 1.
access_log_statsd_sample_rate_factor
The default is 1.
access_log_statsd_metric_prefix
Default is "" (empty-string)
access_log_headers
Default is False.
access_log_headers_only
If access_log_headers is True and access_log_headers_only is set only these headers are logged. Multiple headers can be defined as comma separated list like this: access_log_headers_only = Host, X-Object-Meta-Mtime
reveal_sensitive_prefix
By default, the X-Auth-Token is logged. To obscure the value, set reveal_sensitive_prefix to the number of characters to log. For example, if set to 12, only the first 12 characters of the token appear in the log. An unauthorized access of the log file won't allow unauthorized usage of the token. However, the first 12 or so characters is unique enough that you can trace/debug token usage. Set to 0 to suppress the token completely (replaced by '...' in the log). The default is 16 chars. Note: reveal_sensitive_prefix will not affect the value logged with access_log_headers=True.
log_statsd_valid_http_methods
What HTTP methods are allowed for StatsD logging (comma-sep); request methods not in this list will have "BAD_METHOD" for the <verb> portion of the metric. Default is "GET,HEAD,POST,PUT,DELETE,COPY,OPTIONS".
 
 
[filter:bulk]
 
Note: Put before both ratelimit and auth in the pipeline.
 
use
Entry point for paste.deploy for the bulk middleware. This is the reference to the installed python egg. This is normally egg:swift#bulk.
max_containers_per_extraction
The default is 10000.
max_failed_extractions
The default is 1000.
max_deletes_per_request
The default is 10000.
max_failed_deletes
The default is 1000.
 
In order to keep a connection active during a potentially long bulk request, Swift may return whitespace prepended to the actual response body. This whitespace will be yielded no more than every yield_frequency seconds. The default is 10.
yield_frequency
 
delete_container_retry_count
Note: This parameter is used during a bulk delete of objects and their container. This would frequently fail because it is very likely that all replicated objects have not been deleted by the time the middleware got a successful response. It can be configured the number of retries. And the number of seconds to wait between each retry will be 1.5**retry The default is 0.
 
 
[filter:slo]
 
Note: Put after auth and staticweb in the pipeline.
 
use
Entry point for paste.deploy for the slo middleware. This is the reference to the installed python egg. This is normally egg:swift#slo.
max_manifest_segments
The default is 1000.
max_manifest_size
The default is 2097152.
min_segment_size
The default is 1048576
rate_limit_after_segment
Start rate-limiting object segments after the Nth segment of a segmented object. The default is 10 segments.
rate_limit_segments_per_sec
Once segment rate-limiting kicks in for an object, limit segments served to N per second. The default is 1.
max_get_time
Time limit on GET requests (seconds). The default is 86400.
 
 
[filter:dlo]
 
Note: Put after auth and staticweb in the pipeline. If you don't put it in the pipeline, it will be inserted for you.
 
use
Entry point for paste.deploy for the dlo middleware. This is the reference to the installed python egg. This is normally egg:swift#dlo.
rate_limit_after_segment
Start rate-limiting object segments after the Nth segment of a segmented object. The default is 10 segments.
rate_limit_segments_per_sec
Once segment rate-limiting kicks in for an object, limit segments served to N per second. The default is 1.
max_get_time
Time limit on GET requests (seconds). The default is 86400.
 
 
[filter:container-quotas]
 
Note: Put after auth in the pipeline.
 
use
Entry point for paste.deploy for the container_quotas middleware. This is the reference to the installed python egg. This is normally egg:swift#container_quotas.
 
 
[filter:account-quotas]
 
Note: Put after auth in the pipeline.
 
use
Entry point for paste.deploy for the account_quotas middleware. This is the reference to the installed python egg. This is normally egg:swift#account_quotas.
 
 
[filter:gatekeeper]
 
Note: this middleware requires python-dnspython
 
use
Entry point for paste.deploy for the gatekeeper middleware. This is the reference to the installed python egg. This is normally egg:swift#gatekeeper.
set log_name
Label used when logging. The default is gatekeeper.
set log_facility
Syslog log facility. The default is LOG_LOCAL0.
set log_level
Logging level. The default is INFO.
set log_address
Logging address. The default is /dev/log.
set log_headers
Enables the ability to log request headers. The default is False.
 
 
[filter:container_sync]
 
Note: this middleware requires python-dnspython
 
use
Entry point for paste.deploy for the container_sync middleware. This is the reference to the installed python egg. This is normally egg:swift#container_sync.
allow_full_urls
Set this to false if you want to disallow any full url values to be set for any new X-Container-Sync-To headers. This will keep any new full urls from coming in, but won't change any existing values already in the cluster. Updating those will have to be done manually, as knowing what the true realm endpoint should be cannot always be guessed. The default is true.
current
Set this to specify this clusters //realm/cluster as "current" in /info
 
 
[filter:xprofile]
 
Note: Put it at the beginning of the pipeline to profile all middleware. But it is safer to put this after healthcheck.
 
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.
 
 
[filter:versioned_writes]
 
Note: Put after slo, dlo in the pipeline. If you don't put it in the pipeline, it will be inserted automatically.
 
use
Entry point for paste.deploy for the versioned_writes middleware. This is the reference to the installed python egg. This is normally egg:swift#versioned_writes.
allow_versioned_writes
Enables using versioned writes middleware and exposing configuration settings via HTTP GET /info. WARNING: Setting this option bypasses the "allow_versions" option in the container configuration file, which will be eventually deprecated. See documentation for more details.
 
 

APP SECTION

This is indicated by section name [app:proxy-server]. Below are the parameters that are acceptable within this section.
use
Entry point for paste.deploy for the proxy server. This is the reference to the installed python egg. This is normally egg:swift#proxy.
set log_name
Label used when logging. The default is proxy-server.
set log_facility
Syslog log facility. The default is LOG_LOCAL0.
set log_level
Logging level. The default is INFO.
set log_address
Logging address. The default is /dev/log.
log_handoffs
Log when handoff locations are used. Default is True.
recheck_account_existence
Cache timeout in seconds to send memcached for account existence. The default is 60 seconds.
recheck_container_existence
Cache timeout in seconds to send memcached for container existence. The default is 60 seconds.
object_chunk_size
Chunk size to read from object servers. The default is 8192.
client_chunk_size
Chunk size to read from clients. The default is 8192.
node_timeout
Request timeout to external services. The default is 10 seconds.
recoverable_node_timeout
How long the proxy server will wait for an initial response and to read a chunk of data from the object servers while serving GET / HEAD requests. Timeouts from these requests can be recovered from so setting this to something lower than node_timeout would provide quicker error recovery while allowing for a longer timeout for non-recoverable requests (PUTs). Defaults to node_timeout, should be overridden if node_timeout is set to a high number to prevent client timeouts from firing before the proxy server has a chance to retry.
conn_timeout
Connection timeout to external services. The default is 0.5 seconds.
post_quorum_timeout
How long to wait for requests to finish after a quorum has been established. The default is 0.5 seconds.
error_suppression_interval
Time in seconds that must elapse since the last error for a node to be considered no longer error limited. The default is 60 seconds.
error_suppression_limit
Error count to consider a node error limited. The default is 10.
allow_account_management
Whether account PUTs and DELETEs are even callable. If set to 'true' any authorized user may create and delete accounts; if 'false' no one, even authorized, can. The default is false.
object_post_as_copy
Set object_post_as_copy = false to turn on fast posts where only the metadata changes are stored as new and the original data file is kept in place. This makes for quicker posts. The default is True.
account_autocreate
If set to 'true' authorized accounts that do not yet exist within the Swift cluster will be automatically created. The default is set to false.
auto_create_account_prefix
Prefix used when automatically creating accounts. The default is '.'.
max_containers_per_account
If set to a positive value, trying to create a container when the account already has at least this maximum containers will result in a 403 Forbidden. Note: This is a soft limit, meaning a user might exceed the cap for recheck_account_existence before the 403s kick in.
max_containers_whitelist
This is a comma separated list of account hashes that ignore the max_containers_per_account cap.
deny_host_headers
Comma separated list of Host headers to which the proxy will deny requests. The default is empty.
put_queue_depth
Depth of the proxy put queue. The default is 10.
sorting_method
Storage nodes can be chosen at random (shuffle - default), by using timing measurements (timing), or by using an explicit match (affinity). Using timing measurements may allow for lower overall latency, while using affinity allows for finer control. In both the timing and affinity cases, equally-sorting nodes are still randomly chosen to spread load. The valid values for sorting_method are "affinity", "shuffle", and "timing".
timing_expiry
If the "timing" sorting_method is used, the timings will only be valid for the number of seconds configured by timing_expiry. The default is 300.
request_node_count
Set to the number of nodes to contact for a normal request. You can use '* replicas' at the end to have it use the number given times the number of replicas for the ring being used for the request. The default is '2 * replicas'.
read_affinity
Which backend servers to prefer on reads. Format is r<N> for region N or r<N>z<M> for region N, zone M. The value after the equals is the priority; lower numbers are higher priority. Default is empty, meaning no preference. Example: first read from region 1 zone 1, then region 1 zone 2, then anything in region 2, then everything else: read_affinity = r1z1=100, r1z2=200, r2=300
write_affinity
Which backend servers to prefer on writes. Format is r<N> for region N or r<N>z<M> for region N, zone M. If this is set, then when handling an object PUT request, some number (see setting write_affinity_node_count) of local backend servers will be tried before any nonlocal ones. Default is empty, meaning no preference. Example: try to write to regions 1 and 2 before writing to any other nodes: write_affinity = r1, r2
write_affinity_node_count
The number of local (as governed by the write_affinity setting) nodes to attempt to contact first, before any non-local ones. You can use '* replicas' at the end to have it use the number given times the number of replicas for the ring being used for the request. The default is '2 * replicas'.
swift_owner_headers
These are the headers whose values will only be shown to swift_owners. The exact definition of a swift_owner is up to the auth system in use, but usually indicates administrative responsibilities. The default is 'x-container-read, x-container-write, x-container-sync-key, x-container-sync-to, x-account-meta-temp-url-key, x-account-meta-temp-url-key-2, x-container-meta-temp-url-key, x-container-meta-temp-url-key-2, x-account-access-control'.
rate_limit_after_segment
Start rate-limiting object segments after the Nth segment of a segmented object. The default is 10 segments.
rate_limit_segments_per_sec
Once segment rate-limiting kicks in for an object, limit segments served to N per second. 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.
 

DOCUMENTATION

More in depth documentation about the swift-proxy-server and also OpenStack Swift as a whole can be found at http://swift.openstack.org/admin_guide.html and http://swift.openstack.org
 

SEE ALSO

swift-proxy-server(1)
8/26/2011 Linux