3 navsection: installguide
4 title: Install Keepstore servers
7 Copyright (C) The Arvados Authors. All rights reserved.
9 SPDX-License-Identifier: CC-BY-SA-3.0
12 We are going to install two Keepstore servers. By convention, we use the following hostname pattern:
15 table(table table-bordered table-condensed).
17 |keep0.@uuid_prefix@.your.domain|
18 |keep1.@uuid_prefix@.your.domain|
21 Because the Keepstore servers are not directly accessible from the internet, these hostnames only need to resolve on the local network.
25 On Debian-based systems:
28 <pre><code>~$ <span class="userinput">sudo apt-get install keepstore</span>
32 On Red Hat-based systems:
35 <pre><code>~$ <span class="userinput">sudo yum install keepstore</span>
39 Verify that Keepstore is functional:
42 <pre><code>~$ <span class="userinput">keepstore -h</span>
43 2016/07/01 14:06:21 keepstore starting, pid 32339
45 -azure-max-get-bytes int
46 Maximum bytes to request in a single GET request. If smaller than 67108864, use multiple concurrent range requests to retrieve a block. (default 67108864)
47 -azure-storage-account-key-file string
48 File containing the account key used for subsequent --azure-storage-container-volume arguments.
49 -azure-storage-account-name string
50 Azure storage account name used for subsequent --azure-storage-container-volume arguments.
51 -azure-storage-container-volume value
52 Use the given container as a storage volume. Can be given multiple times. (default [])
53 -azure-storage-replication int
54 Replication level to report to clients when data is stored in an Azure container. (default 3)
55 -blob-signature-ttl int
56 Lifetime of blob permission signatures in seconds. Modifying the ttl will invalidate all existing signatures. See services/api/config/application.default.yml. (default 1209600)
57 -blob-signing-key-file string
58 File containing the secret key for generating and verifying blob permission signatures.
59 -data-manager-token-file string
60 File with the API token used by the Data Manager. All DELETE requests or GET /index requests must carry this token.
62 Enforce permission signatures on requests.
64 Listening address, in the form "host:port". e.g., 10.0.1.24:8000. Omit the host part to listen on all interfaces. (default ":25107")
66 Maximum RAM to use for data buffers, given in multiples of block size (64 MiB). When this limit is reached, HTTP requests requiring buffers (like GET and PUT) will wait for buffer space to be released. (default 128)
68 Maximum concurrent requests. When this limit is reached, new requests will receive 503 responses. Note: this limit does not include idle connections from clients using HTTP keepalive, so it does not strictly limit the number of concurrent connections. (default 2 * max-buffers)
70 If true, nothing will be deleted. Warning: the relevant features in keepstore and data manager have not been extensively tested. You should leave this option alone unless you can afford to lose data. (default true)
71 -permission-key-file string
72 Synonym for -blob-signing-key-file.
74 Synonym for -blob-signature-ttl.
76 Path to write pid file during startup. This file is kept open and locked with LOCK_EX until keepstore exits, so fuser -k pidfile is one way to shut down. Exit immediately if there is an error opening, locking, or writing the pid file.
78 Do not write, delete, or touch anything on the following volumes.
79 -s3-access-key-file string
80 File containing the access key used for subsequent -s3-bucket-volume arguments.
81 -s3-bucket-volume value
82 Use the given bucket as a storage volume. Can be given multiple times. (default [])
84 Endpoint URL used for subsequent -s3-bucket-volume arguments. If blank, use the AWS endpoint corresponding to the -s3-region argument. For Google Storage, use "https://storage.googleapis.com".
86 AWS region used for subsequent -s3-bucket-volume arguments. Allowed values are ["ap-southeast-1" "eu-west-1" "us-gov-west-1" "sa-east-1" "cn-north-1" "ap-northeast-1" "ap-southeast-2" "eu-central-1" "us-east-1" "us-west-1" "us-west-2"].
88 Replication level reported to clients for subsequent -s3-bucket-volume arguments. (default 2)
89 -s3-secret-key-file string
90 File containing the secret key used for subsequent -s3-bucket-volume arguments.
92 EXPERIMENTAL. Enable deletion (garbage collection), even though there are known race conditions that can cause data loss.
94 Serialize read and write operations on the following volumes.
95 -trash-check-interval duration
96 Time duration at which the emptyTrash goroutine will check and delete expired trashed blocks. Default is one day. (default 24h0m0s)
97 -trash-lifetime duration
98 Time duration after a block is trashed during which it can be recovered using an /untrash request
100 Local storage directory. Can be given more than once to add multiple directories. If none are supplied, the default is to use all directories named "keep" that exist in the top level directory of a mount point at startup time. Can be a comma-separated list, but this is deprecated: use multiple -volume arguments instead. (default [])
102 Deprecated synonym for -volume. (default [])
106 h3. Prepare storage volumes
108 {% include 'notebox_begin' %}
109 This section uses a local filesystem as a backing store. If you are using Azure Storage, follow the setup instructions on the "Azure Blob Storage":configure-azure-blob-storage.html page instead.
110 {% include 'notebox_end' %}
112 There are two ways to specify a set of local directories where keepstore should store its data files.
113 # Implicitly, by creating a directory called @keep@ at the top level of each filesystem you intend to use, and omitting @-volume@ arguments.
114 # Explicitly, by providing a @-volume@ argument for each directory.
116 For example, if there are filesystems mounted at @/mnt@ and @/mnt2@:
119 <pre><code>~$ <span class="userinput">mkdir /mnt/keep /mnt2/keep</span>
120 ~$ <span class="userinput">keepstore</span>
121 2015/05/08 13:44:26 keepstore starting, pid 2765
122 2015/05/08 13:44:26 Using volume [UnixVolume /mnt/keep] (writable=true)
123 2015/05/08 13:44:26 Using volume [UnixVolume /mnt2/keep] (writable=true)
124 2015/05/08 13:44:26 listening at :25107
131 <pre><code>~$ <span class="userinput">mkdir /mnt/keep /mnt2/keep</span>
132 ~$ <span class="userinput">keepstore -volume=/mnt/keep -volume=/mnt2/keep</span>
133 2015/05/08 13:44:26 keepstore starting, pid 2765
134 2015/05/08 13:44:26 Using volume [UnixVolume /mnt/keep] (writable=true)
135 2015/05/08 13:44:26 Using volume [UnixVolume /mnt2/keep] (writable=true)
136 2015/05/08 13:44:26 listening at :25107
140 h3. Run keepstore as a supervised service
142 Install runit to supervise the keepstore daemon. {% include 'install_runit' %}
144 Install this script as the run script for the keepstore service, modifying it as directed below.
150 exec GOGC=10 keepstore \
151 -enforce-permissions=true \
152 -blob-signing-key-file=<span class="userinput">/etc/keepstore/blob-signing.key</span> \
153 -max-buffers=<span class="userinput">100</span> \
155 -never-delete=false \
156 -volume=<span class="userinput">/mnt/keep</span> \
157 -volume=<span class="userinput">/mnt2/keep</span>
161 p(#max-buffers). The @-max-buffers@ argument limits keepstore's memory usage. It should be set such that @max-buffers * 64MiB + 10%@ fits comfortably in memory. On a host dedicated to running keepstore, divide total memory by 88MiB to suggest a suitable value. For example, if @grep MemTotal /proc/meminfo@ reports @MemTotal: 7125440 kB@, compute 7125440÷(88×1024)=79 and configure @-max-buffers=79@.
163 If you want access control on your Keepstore server(s), you must specify the @-enforce-permissions@ flag and provide a signing key. The @-blob-signing-key-file@ argument should be a file containing a long random alphanumeric string with no internal line breaks (it is also possible to use a socket or FIFO: keepstore reads it only once, at startup). This key must be the same as the @blob_signing_key@ configured in the "API server's":install-api-server.html configuration file, @/etc/arvados/api/application.yml@.
165 The @-serialize=true@ (default: @false@) argument limits keepstore to one reader/writer process per storage partition. This avoids thrashing by allowing the storage device underneath the storage partition to do read/write operations sequentially. Enabling @-serialize@ can improve Keepstore performance if the storage partitions map 1:1 to physical disks that are dedicated to Keepstore, particularly so for mechanical disks. In some cloud environments, enabling @-serialize@ has also also proven to be beneficial for performance, but YMMV. If your storage partition(s) are backed by network or RAID storage that can handle many simultaneous reader/writer processes without thrashing, you probably do not want to set @-serialize@.
167 h3. Set up additional servers
169 Repeat the above sections to prepare volumes and bring up supervised services on each Keepstore server you are setting up.
171 h3. Tell the API server about the Keepstore servers
173 The API server needs to be informed about the presence of your Keepstore servers. For each of the Keepstore servers you have created, please execute the following commands on your <strong>shell server</strong>.
175 Make sure to update the @service_host@ value to match each of your Keepstore servers.
178 <pre><code>~$ <span class="userinput">prefix=`arv --format=uuid user current | cut -d- -f1`</span>
179 ~$ <span class="userinput">echo "Site prefix is '$prefix'"</span>
180 ~$ <span class="userinput">read -rd $'\000' keepservice <<EOF; arv keep_service create --keep-service "$keepservice"</span>
181 <span class="userinput">{
182 "service_host":"<strong>keep0.$prefix.your.domain</strong>",
183 "service_port":25107,
184 "service_ssl_flag":false,
185 "service_type":"disk"
188 </code></pre></notextile>