3 navsection: installguide
4 title: Configure S3 object storage
7 Copyright (C) The Arvados Authors. All rights reserved.
9 SPDX-License-Identifier: CC-BY-SA-3.0
12 Keepstore can store data in object storage compatible with the S3 API, such as Amazon S3, Google Cloud Storage, or Ceph RADOS.
14 Volumes are configured in the @Volumes@ section of the cluster configuration file.
16 {% include 'assign_volume_uuid' %}
18 <notextile><pre><code> Volumes:
19 <span class="userinput">ClusterID</span>-nyw5e-<span class="userinput">000000000000000</span>:
21 # This section determines which keepstore servers access the
22 # volume. In this example, keep0 has read/write access, and
23 # keep1 has read-only access.
25 # If the AccessViaHosts section is empty or omitted, all
26 # keepstore servers will have read/write access to the
28 "http://<span class="userinput">keep0.ClusterID.example.com</span>:25107": {}
29 "http://<span class="userinput">keep1.ClusterID.example.com</span>:25107": {ReadOnly: true}
31 Driver: <span class="userinput">S3</span>
34 Bucket: <span class="userinput">example-bucket-name</span>
36 # IAM role name to use when retrieving credentials from
37 # instance metadata. It can be omitted, in which case the
38 # role name itself will be retrieved from instance metadata
39 # -- but setting it explicitly may protect you from using
40 # the wrong credentials in the event of an
41 # installation/configuration error.
42 IAMRole: <span class="userinput">""</span>
44 # If you are not using an IAM role for authentication,
45 # specify access credentials here instead.
46 AccessKeyID: <span class="userinput">""</span>
47 SecretAccessKey: <span class="userinput">""</span>
49 # Storage provider region. For Google Cloud Storage, use ""
51 Region: <span class="userinput">us-east-1a</span>
53 # Storage provider endpoint. For Amazon S3, use "" or
54 # omit. For Google Cloud Storage, use
55 # "https://storage.googleapis.com".
58 # Change to true if the region requires a LocationConstraint
60 LocationConstraint: false
62 # Use V2 signatures instead of the default V4. Amazon S3
63 # supports V4 signatures in all regions, but this option
64 # might be needed for other S3-compatible services.
67 # Use the AWS S3 v2 Go driver instead of the goamz driver.
68 UseAWSS3v2Driver: false
70 # By default keepstore stores data using the MD5 checksum
71 # (32 hexadecimal characters) as the object name, e.g.,
72 # "0123456abc...". Setting PrefixLength to 3 changes this
73 # naming scheme to "012/0123456abc...". This can improve
74 # performance, depending on the S3 service being used. For
75 # example, PrefixLength 3 is recommended to avoid AWS
76 # limitations on the number of read/write operations per
77 # second per prefix (see
78 # https://aws.amazon.com/premiumsupport/knowledge-center/s3-request-limit-avoid-throttling/).
80 # Note that changing PrefixLength on an existing volume is
81 # not currently supported. Once you have started using a
82 # bucket as an Arvados volume, you should not change its
83 # configured PrefixLength, or configure another volume using
84 # the same bucket and a different PrefixLength.
87 # Requested page size for "list bucket contents" requests.
90 # Maximum time to wait while making the initial connection
91 # to the backend before failing the request.
94 # Maximum time to wait for a complete response from the
95 # backend before failing the request.
98 # Maximum eventual consistency latency
101 # How much replication is provided by the underlying bucket.
102 # This is used to inform replication decisions at the Keep
106 # If true, do not accept write or trash operations, even if
107 # AccessViaHosts.*.ReadOnly is false.
109 # If false or omitted, enable write access (subject to
110 # AccessViaHosts.*.ReadOnly, where applicable).
113 # Storage classes to associate with this volume. See "Storage
114 # classes" in the "Admin" section of doc.arvados.org.
116 </code></pre></notextile>
118 Two S3 drivers are available. Historically, Arvados has used the @goamz@ driver to talk to S3-compatible services. More recently, support for the @aws-sdk-go-v2@ driver was added. This driver can be activated by setting the @UseAWSS3v2Driver@ flag to @true@.
120 The @aws-sdk-go-v2@ does not support the old S3 v2 signing algorithm. This will not affect interacting with AWS S3, but it might be an issue when Keep is backed by a very old version of a third party S3-compatible service.
122 The @aws-sdk-go-v2@ driver can improve read performance by 50-100% over the @goamz@ driver, but it has not had as much production use. See the "wiki":https://dev.arvados.org/projects/arvados/wiki/Keep_real_world_performance_numbers for details.