ceph/doc/radosgw/config-ref.rst

======================================
 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``.

.. confval:: rgw_frontends
.. confval:: rgw_data
.. confval:: rgw_enable_apis
.. confval:: rgw_cache_enabled
.. confval:: rgw_cache_lru_size
.. confval:: rgw_dns_name
.. confval:: rgw_script_uri
.. confval:: rgw_request_uri
.. confval:: rgw_print_continue
.. confval:: rgw_remote_addr_param
.. confval:: rgw_op_thread_timeout
.. confval:: rgw_op_thread_suicide_timeout
.. confval:: rgw_thread_pool_size
.. confval:: rgw_num_control_oids
.. confval:: rgw_init_timeout
.. confval:: rgw_mime_types_file
.. confval:: rgw_s3_success_create_obj_status
.. confval:: rgw_resolve_cname
.. confval:: rgw_obj_stripe_size
.. confval:: rgw_extended_http_attrs
.. confval:: rgw_exit_timeout_secs
.. confval:: rgw_get_obj_window_size
.. confval:: rgw_get_obj_max_req_size
.. confval:: rgw_multipart_min_part_size
.. confval:: rgw_relaxed_s3_bucket_names
.. confval:: rgw_list_buckets_max_chunk
.. confval:: rgw_override_bucket_index_max_shards
.. confval:: rgw_curl_wait_timeout_ms
.. confval:: rgw_copy_obj_progress
.. confval:: rgw_copy_obj_progress_every_bytes
.. confval:: rgw_admin_entry
.. confval:: rgw_content_length_compat
.. confval:: rgw_bucket_quota_ttl
.. confval:: rgw_user_quota_bucket_sync_interval
.. confval:: rgw_user_quota_sync_interval
.. confval:: rgw_bucket_default_quota_max_objects
.. confval:: rgw_bucket_default_quota_max_size
.. confval:: rgw_user_default_quota_max_objects
.. confval:: rgw_user_default_quota_max_size
.. confval:: rgw_verify_ssl
.. confval:: rgw_max_chunk_size

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:

.. confval:: rgw_lc_max_worker
.. confval:: rgw_lc_max_wp_worker

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 :confval:`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 :confval:`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

.. prompt:: bash $

   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.

.. confval:: rgw_gc_max_objs
.. confval:: rgw_gc_obj_min_wait
.. confval:: rgw_gc_processor_max_time
.. confval:: rgw_gc_processor_period
.. confval:: rgw_gc_max_concurrent_io

: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
==================

.. versionadded:: Jewel

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

.. confval:: rgw_zone
.. confval:: rgw_zonegroup
.. confval:: rgw_realm
.. confval:: rgw_run_sync_thread
.. confval:: rgw_data_log_window
.. confval:: rgw_data_log_changes_size
.. confval:: rgw_data_log_obj_prefix
.. confval:: rgw_data_log_num_shards
.. confval:: rgw_md_log_max_shards

.. important:: The values of :confval:`rgw_data_log_num_shards` and
   :confval:`rgw_md_log_max_shards` should not be changed after sync has
   started.

S3 Settings
===========

.. confval:: rgw_s3_auth_use_ldap

Swift Settings
==============

.. confval:: rgw_enforce_swift_acls
.. confval:: rgw_swift_tenant_name
.. confval:: rgw_swift_token_expiration
.. confval:: rgw_swift_url
.. confval:: rgw_swift_url_prefix
.. confval:: rgw_swift_auth_url
.. confval:: rgw_swift_auth_entry
.. confval:: rgw_swift_account_in_url
.. confval:: rgw_swift_versioning_enabled
.. confval:: rgw_trust_forwarded_https

Logging Settings
================

.. confval:: rgw_log_nonexistent_bucket
.. confval:: rgw_log_object_name
.. confval:: rgw_log_object_name_utc
.. confval:: rgw_usage_max_shards
.. confval:: rgw_usage_max_user_shards
.. confval:: rgw_enable_ops_log
.. confval:: rgw_enable_usage_log
.. confval:: rgw_ops_log_rados
.. confval:: rgw_ops_log_socket_path
.. confval:: rgw_ops_log_data_backlog
.. confval:: rgw_usage_log_flush_threshold
.. confval:: rgw_usage_log_tick_interval
.. confval:: rgw_log_http_headers

Keystone Settings
=================

.. confval:: rgw_keystone_url
.. confval:: rgw_keystone_api_version
.. confval:: rgw_keystone_admin_domain
.. confval:: rgw_keystone_admin_project
.. confval:: rgw_keystone_admin_token
.. confval:: rgw_keystone_admin_token_path
.. confval:: rgw_keystone_admin_tenant
.. confval:: rgw_keystone_admin_user
.. confval:: rgw_keystone_admin_password
.. confval:: rgw_keystone_admin_password_path
.. confval:: rgw_keystone_accepted_roles
.. confval:: rgw_keystone_token_cache_size
.. confval:: rgw_keystone_verify_ssl

Server-side encryption Settings
===============================

.. confval:: rgw_crypt_s3_kms_backend

Barbican Settings
=================

.. confval:: rgw_barbican_url
.. confval:: rgw_keystone_barbican_user
.. confval:: rgw_keystone_barbican_password
.. confval:: rgw_keystone_barbican_tenant
.. confval:: rgw_keystone_barbican_project
.. confval:: rgw_keystone_barbican_domain

HashiCorp Vault Settings
========================

.. confval:: rgw_crypt_vault_auth
.. confval:: rgw_crypt_vault_token_file
.. confval:: rgw_crypt_vault_addr
.. confval:: rgw_crypt_vault_prefix
.. confval:: rgw_crypt_vault_secret_engine
.. confval:: rgw_crypt_vault_namespace


QoS settings
------------

.. versionadded:: Nautilus

The ``civetweb`` frontend has a threading model that uses a thread per
connection and hence is automatically throttled by :confval:`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.


.. confval:: rgw_max_concurrent_requests
.. confval:: rgw_scheduler_type
.. confval:: rgw_dmclock_auth_res
.. confval:: rgw_dmclock_auth_wgt
.. confval:: rgw_dmclock_auth_lim
.. confval:: rgw_dmclock_admin_res
.. confval:: rgw_dmclock_admin_wgt
.. confval:: rgw_dmclock_admin_lim
.. confval:: rgw_dmclock_data_res
.. confval:: rgw_dmclock_data_wgt
.. confval:: rgw_dmclock_data_lim
.. confval:: rgw_dmclock_metadata_res
.. confval:: rgw_dmclock_metadata_wgt
.. confval:: rgw_dmclock_metadata_lim

.. _Architecture: ../../architecture#data-striping
.. _Pool Configuration: ../../rados/configuration/pool-pg-config-ref/
.. _Cluster Pools: ../../rados/operations/pools
.. _Rados cluster handles: ../../rados/api/librados-intro/#step-2-configuring-a-cluster-handle
.. _Barbican: ../barbican
.. _Encryption: ../encryption
.. _HTTP Frontends: ../frontends