218 lines
8.3 KiB
Groff
218 lines
8.3 KiB
Groff
.\"
|
|
.\" Author: Nandini Tata <nandini.tata@intel.com>
|
|
.\" Copyright (c) 2016 OpenStack Foundation.
|
|
.\"
|
|
.\" Licensed under the Apache License, Version 2.0 (the "License");
|
|
.\" you may not use this file except in compliance with the License.
|
|
.\" You may obtain a copy of the License at
|
|
.\"
|
|
.\" http://www.apache.org/licenses/LICENSE-2.0
|
|
.\"
|
|
.\" Unless required by applicable law or agreed to in writing, software
|
|
.\" distributed under the License is distributed on an "AS IS" BASIS,
|
|
.\" WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
|
|
.\" implied.
|
|
.\" See the License for the specific language governing permissions and
|
|
.\" limitations under the License.
|
|
.\"
|
|
.TH swift.conf 5 "8/8/2016" "Linux" "OpenStack Swift"
|
|
|
|
.SH NAME
|
|
.LP
|
|
.B swift.conf
|
|
\- common configuration file for the OpenStack object storage services
|
|
|
|
|
|
|
|
.SH SYNOPSIS
|
|
.LP
|
|
.B swift.conf
|
|
|
|
|
|
|
|
.SH DESCRIPTION
|
|
.PP
|
|
This is the common configuration file used by all services of OpenStack object
|
|
storage services.
|
|
|
|
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
|
|
\fIhttps://docs.pylonsproject.org/projects/pastedeploy/en/latest/#config-format\fR
|
|
|
|
|
|
|
|
.SH SWIFT HASH SECTION
|
|
.PD 1
|
|
.RS 0
|
|
This is indicated by section named [swift-hash]. Below are the parameters that
|
|
are acceptable within this section:
|
|
|
|
.PD 0
|
|
.IP "\fBswift_hash_path_suffix\fR"
|
|
.IP "\fBswift_hash_path_prefix\fR"
|
|
.PD
|
|
|
|
swift_hash_path_suffix and swift_hash_path_prefix are used as part of the
|
|
hashing algorithm when determining data placement in the cluster.
|
|
These values should remain secret and MUST NOT change once a cluster has been
|
|
deployed.
|
|
|
|
Use only printable chars (python -c "import string; print(string.printable)").
|
|
|
|
|
|
|
|
.SH STORAGE POLICY SECTION
|
|
.PD 1
|
|
.RS 0
|
|
This is indicated by section name [storage-policy:#]
|
|
|
|
Storage policies are defined here and they determine various characteristics
|
|
about how objects are stored and treated. Policies are specified by name on
|
|
a per container basis. The policy index is specified in the section header
|
|
and is used internally. The policy with index 0 is always used for legacy
|
|
containers and can be given a name for use in metadata; however, the ring file
|
|
name will always be 'object.ring.gz' for backwards compatibility. If no
|
|
policies are defined, a policy with index 0 will be automatically created for
|
|
backwards compatibility and given the name Policy-0. A default policy is used
|
|
when creating new containers when no policy is specified in the request. If
|
|
no other policies are defined, the policy with index 0 will be declared the
|
|
default. If multiple policies are defined, you must define a policy with index
|
|
0 and you must specify a default. It is recommended you always define a
|
|
section for storage-policy:0. Aliases are not mandatory when defining a
|
|
storage policy.
|
|
|
|
.IP "\fB[storage-policy:index]\fR"
|
|
Each storage policy is defined in a separate section with an index specified
|
|
in the header. Below are the parameters that are acceptable within this
|
|
section:
|
|
|
|
.IP "\fBname\fR"
|
|
Name of the storage policy. Policy names are case insensitive.
|
|
.IP "\fBaliases\fR"
|
|
Multiple names can be assigned to one policy using aliases. All names must
|
|
follow the Swift naming rules.
|
|
.IP "\fBpolicy_type\fR"
|
|
Policy type can be replication or erasure_coding. Replication policy
|
|
replicates the objects to specified number of replicas. Erasure coding uses
|
|
PyECLib API library for encode/decode operations. Please refer to Swift
|
|
documentation for details on how erasure coding is implemented.
|
|
.IP "\fBec_type\fR"
|
|
This parameter must be chosen from the list of EC backends supported by
|
|
PyECLib.
|
|
.IP "\fBec_num_data_fragments\fR"
|
|
This parameter is specific to 'erasure coding' policy_type only. It defines
|
|
the number of fragments that will be comprised of data.
|
|
.IP "\fBec_num_parity_fragments\fR"
|
|
This parameter is specific to 'erasure coding' policy_type only. It defines
|
|
the number of fragments that will be comprised of parity.
|
|
.IP "\fBec_object_segment_size\fR"
|
|
This parameter is specific to 'erasure coding' policy_type only. It defines
|
|
the amount of data that will be buffered up before feeding a segment into the
|
|
encoder/decoder. The default value is 1048576.
|
|
.IP "\fIExamples:\fR"
|
|
|
|
.PD 0
|
|
.IP "[storage-policy:0]"
|
|
.IP "name = Policy-0"
|
|
.IP "default = yes"
|
|
.IP "policy_type = replication"
|
|
.IP "aliases = yellow, orange"
|
|
|
|
.IP "[storage-policy:1]"
|
|
.IP "name = silver"
|
|
.IP "policy_type = replication"
|
|
|
|
.IP "[storage-policy:2]"
|
|
.IP "name = deepfreeze10-4"
|
|
.IP "aliases = df10-4"
|
|
.IP "policy_type = erasure_coding"
|
|
.IP "ec_type = liberasurecode_rs_vand"
|
|
.IP "ec_num_data_fragments = 10"
|
|
.IP "ec_num_parity_fragments = 4"
|
|
.IP "ec_object_segment_size = 1048576"
|
|
.PD
|
|
.RE
|
|
.PD
|
|
|
|
|
|
|
|
.SH SWIFT CONSTRAINTS SECTION
|
|
.PD 1
|
|
.RS 0
|
|
This is indicated by section name [swift-constraints]. This section sets the
|
|
basic constraints on data saved in the swift cluster. These constraints are
|
|
automatically published by the proxy server in responses to /info requests.
|
|
Below are the parameters that are acceptable within this section:
|
|
.IP "\fBmax_file_size\fR"
|
|
max_file_size is the largest "normal" object that can be saved in the cluster.
|
|
This is also the limit on the size of each segment of a "large" object when
|
|
using the large object manifest support. This value is set in bytes. Setting
|
|
it to lower than 1MiB will cause some tests to fail. It is STRONGLY
|
|
recommended to leave this value at the default (5 * 2**30 + 2).
|
|
.IP "\fBmax_meta_name_length\fR"
|
|
max_meta_name_length is the max number of bytes in the utf8 encoding of the
|
|
name portion of a metadata header.
|
|
.IP "\fBmax_meta_value_length\fR"
|
|
max_meta_value_length is the max number of bytes in the utf8 encoding of a
|
|
metadata value.
|
|
.IP "\fBmax_meta_count\fR"
|
|
max_meta_count is the max number of metadata keys that can be stored on a
|
|
single account, container, or object.
|
|
.IP "\fBmax_meta_overall_size\fR"
|
|
max_meta_overall_size is the max number of bytes in the utf8 encoding of the
|
|
metadata (keys + values).
|
|
.IP "\fBmax_header_size\fR"
|
|
max_header_size is the max number of bytes in the utf8 encoding of each
|
|
header. Using 8192 as default because eventlet uses 8192 as max size of header
|
|
line. This value may need to be increased when using identity v3 API tokens
|
|
including more than 7 catalog entries.
|
|
.IP "\fBextra_header_count\fR"
|
|
By default the maximum number of allowed headers depends on the number of max
|
|
allowed metadata settings plus a default value of 36 for swift internally
|
|
generated headers and regular http headers. If for some reason this is not
|
|
enough (custom middleware for example) it can be increased with the
|
|
extra_header_count constraint.
|
|
.IP "\fBmax_object_name_length\fR"
|
|
max_object_name_length is the max number of bytes in the utf8 encoding of an
|
|
object name.
|
|
.IP "\fBcontainer_listing_limit\fR"
|
|
container_listing_limit is the default (and max) number of items returned for
|
|
a container listing request.
|
|
.IP "\fBaccount_listing_limit\fR"
|
|
account_listing_limit is the default (and max) number of items returned for an
|
|
account listing request.
|
|
.IP "\fBmax_account_name_length\fR"
|
|
max_account_name_length is the max number of bytes in the utf8 encoding of an
|
|
account name.
|
|
.IP "\fBmax_container_name_length\fR"
|
|
max_container_name_length is the max number of bytes in the utf8 encoding of a
|
|
container name.
|
|
.IP "\fBvalid_api_versions\fR"
|
|
By default, all REST API calls should use "v1" or "v1.0" as the version string,
|
|
for example "/v1/account". This can be manually overridden to make this
|
|
backward-compatible, in case a different version string has been used before.
|
|
Use a comma-separated list in case of multiple allowed versions, for example
|
|
valid_api_versions = v0,v1,v2.
|
|
This is only enforced for account, container and object requests. The allowed
|
|
api versions are by default excluded from /info.
|
|
.IP "\fBauto_create_account_prefix\fR"
|
|
auto_create_account_prefix specifies the prefix for system accounts, such as
|
|
those used by the object-expirer, and container-sharder.
|
|
Default is ".".
|
|
|
|
|
|
|
|
.SH DOCUMENTATION
|
|
.LP
|
|
More in depth documentation about the swift.conf and also OpenStack-Swift as a
|
|
whole can be found at
|
|
.BI https://docs.openstack.org/swift/latest/admin_guide.html
|
|
and
|
|
.BI https://docs.openstack.org/swift/latest/
|