Ceph Object Gateway Config Reference

The following settings may added to the Ceph configuration file (i.e., usually ceph.conf) under the [client.radosgw.{instance-name}] section. The settings may contain default values. If you do not specify each setting in the Ceph configuration file, the default value will be set automatically.

Configuration variables set under the [client.radosgw.{instance-name}] section will not apply to rgw or radosgw-admin commands without an instance-name specified in the command. Thus variables meant to be applied to all RGW instances or all radosgw-admin options can be put into the [global] or the [client] section to avoid specifying instance-name.

rgw_frontends

Description

Configures the HTTP frontend(s). The configuration for multiple frontends can be provided in a comma-delimited list. Each frontend configuration may include a list of options separated by spaces, where each option is in the form “key=value” or “key”. See HTTP Frontends for more on supported options.

Type

String

Default

beast port=7480

rgw_data

Description

Sets the location of the data files for Ceph RADOS Gateway.

Type

String

Default

/var/lib/ceph/radosgw/$cluster-$id

rgw_enable_apis

Description

Enables the specified APIs.

Note

Enabling the s3 API is a requirement for any radosgw instance that is meant to participate in a multi-site configuration.

Type

String

Default

s3, s3website, swift, swift_auth, admin, sts, iam, notifications All APIs.

rgw_cache_enabled

Description

Whether the Ceph Object Gateway cache is enabled.

Type

Boolean

Default

true

rgw_cache_lru_size

Description

The number of entries in the Ceph Object Gateway cache.

Type

Integer

Default

10000

rgw_socket_path

Description

The socket path for the domain socket. FastCgiExternalServer uses this socket. If you do not specify a socket path, Ceph Object Gateway will not run as an external server. The path you specify here must be the same as the path specified in the rgw.conf file.

Type

String

Default

N/A

rgw_fcgi_socket_backlog

Description

The socket backlog for fcgi.

Type

Integer

Default

1024

rgw_host

Description

The host for the Ceph Object Gateway instance. Can be an IP address or a hostname.

Type

String

Default

0.0.0.0

rgw_port

Description

Port the instance listens for requests. If not specified, Ceph Object Gateway runs external FastCGI.

Type

String

Default

None

rgw_dns_name

Description

The DNS name of the served domain. See also the hostnames setting within regions.

Type

String

Default

None

rgw_script_uri

Description

The alternative value for the SCRIPT_URI if not set in the request.

Type

String

Default

None

rgw_request_uri

Description

The alternative value for the REQUEST_URI if not set in the request.

Type

String

Default

None

rgw_print_continue

Description

Enable 100-continue if it is operational.

Type

Boolean

Default

true

rgw_remote_addr_param

Description

The remote address parameter. For example, the HTTP field containing the remote address, or the X-Forwarded-For address if a reverse proxy is operational.

Type

String

Default

REMOTE_ADDR

rgw_op_thread_timeout

Description

The timeout in seconds for open threads.

Type

Integer

Default

600

rgw_op_thread_suicide_timeout

Description

The time timeout in seconds before a Ceph Object Gateway process dies. Disabled if set to 0.

Type

Integer

Default

0

rgw_thread_pool_size

Description

The size of the thread pool.

Type

Integer

Default

100 threads.

rgw_num_control_oids

Description

The number of notification objects used for cache synchronization between different rgw instances.

Type

Integer

Default

8

rgw_init_timeout

Description

The number of seconds before Ceph Object Gateway gives up on initialization.

Type

Integer

Default

30

rgw_mime_types_file

Description

The path and location of the MIME-types file. Used for Swift auto-detection of object types.

Type

String

Default

/etc/mime.types

rgw_s3_success_create_obj_status

Description

The alternate success status response for create-obj.

Type

Integer

Default

0

rgw_resolve_cname

Description

Whether rgw should use DNS CNAME record of the request hostname field (if hostname is not equal to rgw dns name).

Type

Boolean

Default

false

rgw_obj_stripe_size

Description

The size of an object stripe for Ceph Object Gateway objects. See Architecture for details on striping.

Type

Integer

Default

4 << 20

rgw_extended_http_attrs

Description

Add new set of attributes that could be set on an entity (user, bucket or object). These extra attributes can be set through HTTP header fields when putting the entity or modifying it using POST method. If set, these attributes will return as HTTP fields when doing GET/HEAD on the entity.

Type

String

Default

None

Example

“content_foo, content_bar, x-foo-bar”

rgw_exit_timeout_secs

Description

Number of seconds to wait for a process before exiting unconditionally.

Type

Integer

Default

120

rgw_get_obj_window_size

Description

The window size in bytes for a single object request.

Type

Integer

Default

16 << 20

rgw_get_obj_max_req_size

Description

The maximum request size of a single get operation sent to the Ceph Storage Cluster.

Type

Integer

Default

4 << 20

rgw_relaxed_s3_bucket_names

Description

Enables relaxed S3 bucket names rules for US region buckets.

Type

Boolean

Default

false

rgw_list_buckets_max_chunk

Description

The maximum number of buckets to retrieve in a single operation when listing user buckets.

Type

Integer

Default

1000

rgw_override_bucket_index_max_shards

Description

Represents the number of shards for the bucket index object, a value of zero indicates there is no sharding. It is not recommended to set a value too large (e.g. thousand) as it increases the cost for bucket listing. This variable should be set in the client or global sections so that it is automatically applied to radosgw-admin commands.

Type

Integer

Default

0

rgw_curl_wait_timeout_ms

Description

The timeout in milliseconds for certain curl calls.

Type

Integer

Default

1000

rgw_copy_obj_progress

Description

Enables output of object progress during long copy operations.

Type

Boolean

Default

true

rgw_copy_obj_progress_every_bytes

Description

The minimum bytes between copy progress output.

Type

Integer

Default

1024 * 1024

rgw_admin_entry

Description

The entry point for an admin request URL.

Type

String

Default

admin

rgw_content_length_compat

Description

Enable compatibility handling of FCGI requests with both CONTENT_LENGTH and HTTP_CONTENT_LENGTH set.

Type

Boolean

Default

false

rgw_bucket_quota_ttl

Description

The amount of time in seconds cached quota information is trusted. After this timeout, the quota information will be re-fetched from the cluster.

Type

Integer

Default

600

rgw_user_quota_bucket_sync_interval

Description

The amount of time in seconds bucket quota information is accumulated before syncing to the cluster. During this time, other RGW instances will not see the changes in bucket quota stats from operations on this instance.

Type

Integer

Default

180

rgw_user_quota_sync_interval

Description

The amount of time in seconds user quota information is accumulated before syncing to the cluster. During this time, other RGW instances will not see the changes in user quota stats from operations on this instance.

Type

Integer

Default

180

rgw_bucket_default_quota_max_objects

Description

Default max number of objects per bucket. Set on new users, if no other quota is specified. Has no effect on existing users. This variable should be set in the client or global sections so that it is automatically applied to radosgw-admin commands.

Type

Integer

Default

-1

rgw_bucket_default_quota_max_size

Description

Default max capacity per bucket, in bytes. Set on new users, if no other quota is specified. Has no effect on existing users.

Type

Integer

Default

-1

rgw_user_default_quota_max_objects

Description

Default max number of objects for a user. This includes all objects in all buckets owned by the user. Set on new users, if no other quota is specified. Has no effect on existing users.

Type

Integer

Default

-1

rgw_user_default_quota_max_size

Description

The value for user max size quota in bytes set on new users, if no other quota is specified. Has no effect on existing users.

Type

Integer

Default

-1

rgw_verify_ssl

Description

Verify SSL certificates while making requests.

Type

Boolean

Default

true

Lifecycle Settings

Bucket Lifecycle configuration can be used to manage your objects so they are stored effectively throughout their lifetime. In past releases Lifecycle processing was rate-limited by single threaded processing. With the Nautilus release this has been addressed and the Ceph Object Gateway now allows for parallel thread processing of bucket lifecycles across additional Ceph Object Gateway instances and replaces the in-order index shard enumeration with a random ordered sequence.

There are two options in particular to look at when looking to increase the aggressiveness of lifecycle processing:

rgw_lc_max_worker

Description

This option specifies the number of lifecycle worker threads to run in parallel, thereby processing bucket and index shards simultaneously.

Type

Integer

Default

3

rgw_lc_max_wp_worker

Description

This option specifies the number of threads in each lifecycle workers work pool. This option can help accelerate processing each bucket.

These values can be tuned based upon your specific workload to further increase the aggressiveness of lifecycle processing. For a workload with a larger number of buckets (thousands) you would look at increasing the rgw_lc_max_worker value from the default value of 3 whereas for a workload with a smaller number of buckets but higher number of objects (hundreds of thousands) per bucket you would consider decreasing rgw_lc_max_wp_worker from the default value of 3.

NOTE

When looking to tune either of these specific values please validate the current Cluster performance and Ceph Object Gateway utilization before increasing.

Garbage Collection Settings

The Ceph Object Gateway allocates storage for new objects immediately.

The Ceph Object Gateway purges the storage space used for deleted and overwritten objects in the Ceph Storage cluster some time after the gateway deletes the objects from the bucket index. The process of purging the deleted object data from the Ceph Storage cluster is known as Garbage Collection or GC.

To view the queue of objects awaiting garbage collection, execute the following:

$ radosgw-admin gc list

Note: specify ``--include-all`` to list all entries, including unexpired

Garbage collection is a background activity that may execute continuously or during times of low loads, depending upon how the administrator configures the Ceph Object Gateway. By default, the Ceph Object Gateway conducts GC operations continuously. Since GC operations are a normal part of Ceph Object Gateway operations, especially with object delete operations, objects eligible for garbage collection exist most of the time.

Some workloads may temporarily or permanently outpace the rate of garbage collection activity. This is especially true of delete-heavy workloads, where many objects get stored for a short period of time and then deleted. For these types of workloads, administrators can increase the priority of garbage collection operations relative to other operations with the following configuration parameters.

rgw_gc_max_objs

Description

The maximum number of objects that may be handled by garbage collection in one garbage collection processing cycle. Please do not change this value after the first deployment.

Type

Integer

Default

32

rgw_gc_obj_min_wait

Description

The minimum wait time before a deleted object may be removed and handled by garbage collection processing.

Type

Integer

Default

2 * 3600

rgw_gc_processor_max_time

Description

The maximum time between the beginning of two consecutive garbage collection processing cycles.

Type

Integer

Default

3600

rgw_gc_processor_period

Description

The cycle time for garbage collection processing.

Type

Integer

Default

3600

rgw_gc_max_concurrent_io

Description

The maximum number of concurrent IO operations that the RGW garbage collection thread will use when purging old data.

Type

Integer

Default

10

Tuning Garbage Collection for Delete Heavy Workloads

As an initial step towards tuning Ceph Garbage Collection to be more aggressive the following options are suggested to be increased from their default configuration values:

rgw_gc_max_concurrent_io = 20 rgw_gc_max_trim_chunk = 64

NOTE

Modifying these values requires a restart of the RGW service.

Once these values have been increased from default please monitor for performance of the cluster during Garbage Collection to verify no adverse performance issues due to the increased values.

Multisite Settings

New in version Jewel.

You may include the following settings in your Ceph configuration file under each [client.radosgw.{instance-name}] instance.

rgw_zone

Description

The name of the zone for the gateway instance. If no zone is set, a cluster-wide default can be configured with the command radosgw-admin zone default.

Type

String

Default

None

rgw_zonegroup

Description

The name of the zonegroup for the gateway instance. If no zonegroup is set, a cluster-wide default can be configured with the command radosgw-admin zonegroup default.

Type

String

Default

None

rgw_realm

Description

The name of the realm for the gateway instance. If no realm is set, a cluster-wide default can be configured with the command radosgw-admin realm default.

Type

String

Default

None

rgw_run_sync_thread

Description

If there are other zones in the realm to sync from, spawn threads to handle the sync of data and metadata.

Type

Boolean

Default

true

rgw_data_log_window

Description

The data log entries window in seconds.

Type

Integer

Default

30

rgw_data_log_changes_size

Description

The number of in-memory entries to hold for the data changes log.

Type

Integer

Default

1000

rgw_data_log_obj_prefix

Description

The object name prefix for the data log.

Type

String

Default

data_log

rgw_data_log_num_shards

Description

The number of shards (objects) on which to keep the data changes log.

Type

Integer

Default

128

rgw_md_log_max_shards

Description

The maximum number of shards for the metadata log.

Type

Integer

Default

64

Important

The values of rgw_data_log_num_shards and rgw_md_log_max_shards should not be changed after sync has started.

S3 Settings

rgw_s3_auth_use_ldap

Description

Should S3 authentication use LDAP?

Type

Boolean

Default

false

Swift Settings

rgw_enforce_swift_acls

Description

Enforces the Swift Access Control List (ACL) settings.

Type

Boolean

Default

true

rgw_swift_token_expiration

Description

The time in seconds for expiring a Swift token.

Type

Integer

Default

24 * 3600

rgw_swift_url

Description

The URL for the Ceph Object Gateway Swift API.

Type

String

Default

None

rgw_swift_url_prefix

Description

The URL prefix for the Swift API, to distinguish it from the S3 API endpoint. The default is swift, which makes the Swift API available at the URL http://host:port/swift/v1 (or http://host:port/swift/v1/AUTH_%(tenant_id)s if rgw swift account in url is enabled).

For compatibility, setting this configuration variable to the empty string causes the default swift to be used; if you do want an empty prefix, set this option to /.

Warning

If you set this option to /, you must disable the S3 API by modifying rgw enable apis to exclude s3. It is not possible to operate radosgw with rgw swift url prefix = / and simultaneously support both the S3 and Swift APIs. If you do need to support both APIs without prefixes, deploy multiple radosgw instances to listen on different hosts (or ports) instead, enabling some for S3 and some for Swift.

Default

swift

Example

“/swift-testing”

rgw_swift_auth_url

Description

Default URL for verifying v1 auth tokens (if not using internal Swift auth).

Type

String

Default

None

rgw_swift_auth_entry

Description

The entry point for a Swift auth URL.

Type

String

Default

auth

rgw_swift_account_in_url

Description

Whether or not the Swift account name should be included in the Swift API URL.

If set to false (the default), then the Swift API will listen on a URL formed like http://host:port/<rgw_swift_url_prefix>/v1, and the account name (commonly a Keystone project UUID if radosgw is configured with Keystone integration) will be inferred from request headers.

If set to true, the Swift API URL will be http://host:port/<rgw_swift_url_prefix>/v1/AUTH_<account_name> (or http://host:port/<rgw_swift_url_prefix>/v1/AUTH_<keystone_project_id>) instead, and the Keystone object-store endpoint must accordingly be configured to include the AUTH_%(tenant_id)s suffix.

You must set this option to true (and update the Keystone service catalog) if you want radosgw to support publicly-readable containers and temporary URLs.

Type

Boolean

Default

false

rgw_swift_versioning_enabled

Description

Enables the Object Versioning of OpenStack Object Storage API. This allows clients to put the X-Versions-Location attribute on containers that should be versioned. The attribute specifies the name of container storing archived versions. It must be owned by the same user that the versioned container due to access control verification - ACLs are NOT taken into consideration. Those containers cannot be versioned by the S3 object versioning mechanism.

A slightly different attribute, X-History-Location, which is also understood by OpenStack Swift for handling DELETE operations, is currently not supported.

Type

Boolean

Default

false

rgw_trust_forwarded_https

Description

When a proxy in front of radosgw is used for ssl termination, radosgw does not know whether incoming http connections are secure. Enable this option to trust the Forwarded and X-Forwarded-Proto headers sent by the proxy when determining whether the connection is secure. This is required for some features, such as server side encryption. (Never enable this setting if you do not have a trusted proxy in front of radosgw, or else malicious users will be able to set these headers in any request.)

Type

Boolean

Default

false

Logging Settings

rgw_log_nonexistent_bucket

Description

Enables Ceph Object Gateway to log a request for a non-existent bucket.

Type

Boolean

Default

false

rgw_log_object_name

Description

The logging format for an object name. See ma npage date for details about format specifiers.

Type

Date

Default

%Y-%m-%d-%H-%i-%n

rgw_log_object_name_utc

Description

Whether a logged object name includes a UTC time. If false, it uses the local time.

Type

Boolean

Default

false

rgw_usage_max_shards

Description

The maximum number of shards for usage logging.

Type

Integer

Default

32

rgw_usage_max_user_shards

Description

The maximum number of shards used for a single user’s usage logging.

Type

Integer

Default

1

rgw_enable_ops_log

Description

Enable logging for each successful Ceph Object Gateway operation.

Type

Boolean

Default

false

rgw_enable_usage_log

Description

Enable the usage log.

Type

Boolean

Default

false

rgw_ops_log_rados

Description

Whether the operations log should be written to the Ceph Storage Cluster backend.

Type

Boolean

Default

true

rgw_ops_log_socket_path

Description

The Unix domain socket for writing operations logs.

Type

String

Default

None

rgw_ops_log_data_backlog

Description

The maximum data backlog data size for operations logs written to a Unix domain socket.

Type

Integer

Default

5 << 20

rgw_usage_log_flush_threshold

Description

The number of dirty merged entries in the usage log before flushing synchronously.

Type

Integer

Default

1024

rgw_usage_log_tick_interval

Description

Flush pending usage log data every n seconds.

Type

Integer

Default

30

rgw_log_http_headers

Description

Comma-delimited list of HTTP headers to include with ops log entries. Header names are case insensitive, and use the full header name with words separated by underscores.

Type

String

Default

None

Example

“http_x_forwarded_for, http_x_special_k”

rgw_intent_log_object_name

Description

The logging format for the intent log object name. See the manpage date for details about format specifiers.

Type

Date

Default

%Y-%m-%d-%i-%n

rgw_intent_log_object_name_utc

Description

Whether the intent log object name uses UTC time. If false, it uses the local time.

Type

Boolean

Default

false

Keystone Settings

rgw_keystone_url

Description

The URL for the Keystone server.

Type

String

Default

None

rgw_keystone_api_version

Description

The version (2 or 3) of OpenStack Identity API that should be used for communication with the Keystone server.

Type

Integer

Default

2

rgw_keystone_admin_domain

Description

The name of OpenStack domain with admin privilege when using OpenStack Identity API v3.

Type

String

Default

None

rgw_keystone_admin_project

Description

The name of OpenStack project with admin privilege when using OpenStack Identity API v3. If left unspecified, value of rgw keystone admin tenant will be used instead.

Type

String

Default

None

rgw_keystone_admin_token

Description

The Keystone admin token (shared secret). In Ceph RGW authentication with the admin token has priority over authentication with the admin credentials (rgw_keystone_admin_user, rgw_keystone_admin_password, rgw_keystone_admin_tenant, rgw_keystone_admin_project, rgw_keystone_admin_domain). The Keystone admin token has been deprecated, but can be used to integrate with older environments. It is preferred to instead configure rgw_keystone_admin_token_path to avoid exposing the token.

Type

String

Default

None

rgw_keystone_admin_token_path

Description

Path to a file containing the Keystone admin token (shared secret). In Ceph RadosGW authentication with the admin token has priority over authentication with the admin credentials (rgw_keystone_admin_user, rgw_keystone_admin_password, rgw_keystone_admin_tenant, rgw_keystone_admin_project, rgw_keystone_admin_domain). The Keystone admin token has been deprecated, but can be used to integrate with older environments.

Type

String

Default

None

rgw_keystone_admin_tenant

Description

The name of OpenStack tenant with admin privilege (Service Tenant) when using OpenStack Identity API v2

Type

String

Default

None

rgw_keystone_admin_user

Description

The name of OpenStack user with admin privilege for Keystone authentication (Service User) when using OpenStack Identity API v2

Type

String

Default

None

rgw_keystone_admin_password

Description

The password for OpenStack admin user when using OpenStack Identity API v2. It is preferred to instead configure rgw_keystone_admin_password_path to avoid exposing the token.

Type

String

Default

None

rgw_keystone_admin_password_path

Description

Path to a file containing the password for OpenStack admin user when using OpenStack Identity API v2.

Type

String

Default

None

rgw_keystone_accepted_roles

Description

The roles required to serve requests.

Type

String

Default

Member, admin

rgw_keystone_token_cache_size

Description

The maximum number of entries in each Keystone token cache.

Type

Integer

Default

10000

rgw_keystone_revocation_interval

Description

The number of seconds between token revocation checks.

Type

Integer

Default

15 * 60

rgw_keystone_verify_ssl

Description

Verify SSL certificates while making token requests to keystone.

Type

Boolean

Default

true

Server-side encryption Settings

rgw_crypt_s3_kms_backend

Description

Where the SSE-KMS encryption keys are stored. Supported KMS systems are OpenStack Barbican (barbican, the default) and HashiCorp Vault (vault).

Type

String

Default

None

Barbican Settings

rgw_barbican_url

Description

The URL for the Barbican server.

Type

String

Default

None

rgw_keystone_barbican_user

Description

The name of the OpenStack user with access to the Barbican secrets used for Encryption.

Type

String

Default

None

rgw_keystone_barbican_password

Description

The password associated with the Barbican user.

Type

String

Default

None

rgw_keystone_barbican_tenant

Description

The name of the OpenStack tenant associated with the Barbican user when using OpenStack Identity API v2.

Type

String

Default

None

rgw_keystone_barbican_project

Description

The name of the OpenStack project associated with the Barbican user when using OpenStack Identity API v3.

Type

String

Default

None

rgw_keystone_barbican_domain

Description

The name of the OpenStack domain associated with the Barbican user when using OpenStack Identity API v3.

Type

String

Default

None

HashiCorp Vault Settings

rgw_crypt_vault_auth

Description

Type of authentication method to be used. The only method currently supported is token.

Type

String

Default

token

rgw_crypt_vault_token_file

Description

If authentication method is token, provide a path to the token file, which should be readable only by Rados Gateway.

Type

String

Default

None

rgw_crypt_vault_addr

Description

Vault server base address, e.g. http://vaultserver:8200.

Type

String

Default

None

rgw_crypt_vault_prefix

Description

The Vault secret URL prefix, which can be used to restrict access to a particular subset of the secret space, e.g. /v1/secret/data.

Type

String

Default

None

rgw_crypt_vault_secret_engine

Description

Vault Secret Engine to be used to retrieve encryption keys: choose between kv-v2, transit.

Type

String

Default

None

rgw_crypt_vault_namespace

Description

If set, Vault Namespace provides tenant isolation for teams and individuals on the same Vault Enterprise instance, e.g. acme/tenant1

Type

String

Default

None

QoS settings

New in version Nautilus.

The civetweb frontend has a threading model that uses a thread per connection and hence is automatically throttled by rgw_thread_pool_size configurable when it comes to accepting connections. The newer beast frontend is not restricted by the thread pool size when it comes to accepting new connections, so a scheduler abstraction is introduced in the Nautilus release to support future methods of scheduling requests.

Currently the scheduler defaults to a throttler which throttles the active connections to a configured limit. QoS based on mClock is currently in an experimental phase and not recommended for production yet. Current implementation of dmclock_client op queue divides RGW Ops on admin, auth (swift auth, sts) metadata & data requests.

rgw_max_concurrent_requests

Description

Maximum number of concurrent HTTP requests that the Beast front end will process. Tuning this can help to limit memory usage under heavy load.

Type

Integer

Default

1024

rgw_scheduler_type

Description

The RGW scheduler to use. Valid values are throttler` and ``dmclock. Currently defaults to throttler which throttles Beast frontend requests. dmclock` is *experimental* and requires the ``dmclock to be included in the experimental_feature_enabled configuration option.

The options below tune the experimental dmclock scheduler. For additional reading on dmclock, see QoS Based on mClock. op_class for the flags below is one of admin, auth, metadata, or data.

rgw_dmclock_<op_class>_res

Description

The mclock reservation for op_class requests

Type

float

Default

100.0

rgw_dmclock_<op_class>_wgt

Description

The mclock weight for op_class requests

Type

float

Default

1.0

rgw_dmclock_<op_class>_lim

Description

The mclock limit for op_class requests

Type

float

Default

0.0