3 navsection: installguide
4 title: Install Keep-web server
7 Copyright (C) The Arvados Authors. All rights reserved.
9 SPDX-License-Identifier: CC-BY-SA-3.0
12 The Keep-web server provides read-only HTTP access to files stored in Keep. It serves public data to unauthenticated clients, and serves private data to clients that supply Arvados API tokens. It can be installed anywhere with access to Keep services, typically behind a web proxy that provides SSL support. See the "godoc page":http://godoc.org/github.com/curoverse/arvados/services/keep-web for more detail.
14 By convention, we use the following hostnames for the Keep-web service:
17 <pre><code>download.<span class="userinput">uuid_prefix</span>.your.domain
18 collections.<span class="userinput">uuid_prefix</span>.your.domain
19 *.collections.<span class="userinput">uuid_prefix</span>.your.domain
23 The above hostnames should resolve from anywhere on the internet.
27 Typically Keep-web runs on the same host as Keepproxy.
29 On Debian-based systems:
32 <pre><code>~$ <span class="userinput">sudo apt-get install keep-web</span>
36 On Red Hat-based systems:
39 <pre><code>~$ <span class="userinput">sudo yum install keep-web</span>
43 Verify that @Keep-web@ is functional:
46 <pre><code>~$ <span class="userinput">keep-web -h</span>
49 Serve public data to anonymous clients. Try the token supplied in the ARVADOS_API_TOKEN environment variable when none of the tokens provided in an HTTP request succeed in reading the desired collection. (default false)
50 -attachment-only-host string
51 Accept credentials, and add "Content-Disposition: attachment" response headers, for requests at this hostname:port. Prohibiting inline display makes it possible to serve untrusted and non-public content from a single origin, i.e., without wildcard DNS or SSL.
53 Address to listen on: "host:port", or ":port" to listen on all interfaces. (default ":80")
55 Serve non-public content from a single origin. Dangerous: read docs before using!
59 {% assign railscmd = "bundle exec ./script/get_anonymous_user_token.rb --get" %}
60 {% assign railsout = "zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz" %}
61 If you intend to use Keep-web to serve public data to anonymous clients, configure it with an anonymous token. You can use the same one you used when you set up your Keepproxy server, or use the following command on the <strong>API server</strong> to create another. {% include 'install_rails_command' %}
63 Install runit to supervise the Keep-web daemon. {% include 'install_runit' %}
65 The basic command to start Keep-web in the service run script is:
68 <pre><code>export ARVADOS_API_HOST=<span class="userinput">uuid_prefix</span>.your.domain
69 export ARVADOS_API_TOKEN="<span class="userinput">{{railsout}}</span>"
70 exec sudo -u nobody keep-web \
71 -listen=<span class="userinput">:9002</span> \
72 -attachment-only-host=<span class="userinput">download.uuid_prefix.your.domain</span> \
78 Omit the @-allow-anonymous@ argument if you do not want to serve public data.
80 Set @ARVADOS_API_HOST_INSECURE=1@ if your API server's SSL certificate is not signed by a recognized CA.
82 h3. Set up a reverse proxy with SSL support
84 The Keep-web service will be accessible from anywhere on the internet, so we recommend using SSL for transport encryption.
86 This is best achieved by putting a reverse proxy with SSL support in front of Keep-web, running on port 443 and passing requests to Keep-web on port 9002 (or whatever port you chose in your run script).
88 Note: A wildcard SSL certificate is required in order to support a full-featured secure Keep-web service. Without it, Keep-web can offer file downloads for all Keep data; however, in order to avoid cross-site scripting vulnerabilities, Keep-web refuses to serve private data as web content except when it is accessed using a "secret link" share. With a wildcard SSL certificate and DNS configured appropriately, all data can be served as web content.
90 For example, using Nginx:
94 server 127.0.0.1:<span class="userinput">9002</span>;
98 listen <span class="userinput">[your public IP address]</span>:443 ssl;
99 server_name download.<span class="userinput">uuid_prefix</span>.your.domain
100 collections.<span class="userinput">uuid_prefix</span>.your.domain
101 *.collections.<span class="userinput">uuid_prefix</span>.your.domain
102 ~.*--collections.<span class="userinput">uuid_prefix</span>.your.domain;
104 proxy_connect_timeout 90s;
105 proxy_read_timeout 300s;
108 ssl_certificate <span class="userinput"/>YOUR/PATH/TO/cert.pem</span>;
109 ssl_certificate_key <span class="userinput"/>YOUR/PATH/TO/cert.key</span>;
112 proxy_pass http://keep-web;
113 proxy_set_header Host $host;
114 proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
119 {% include 'notebox_begin' %}
120 If you restrict access to your Arvados services based on network topology -- for example, your proxy server is not reachable from the public internet -- additional proxy configuration might be needed to thwart cross-site scripting attacks that would circumvent your restrictions. Read the "'Intranet mode' section of the Keep-web documentation":https://godoc.org/github.com/curoverse/arvados/services/keep-web#hdr-Intranet_mode now.
121 {% include 'notebox_end' %}
125 Configure your DNS servers so the following names resolve to your Nginx proxy's public IP address.
126 * @download.uuid_prefix.your.domain@
127 * @collections.uuid_prefix.your.domain@
128 * @*--collections.uuid_prefix.your.domain@, if you have a wildcard SSL certificate valid for @*.uuid_prefix.your.domain@ and your DNS server allows this without interfering with other DNS names.
129 * @*.collections.uuid_prefix.your.domain@, if you have a wildcard SSL certificate valid for these names.
131 If neither of the above wildcard options is feasible, you have two choices:
132 # Serve web content at @collections.uuid_prefix.your.domain@, but only for unauthenticated requests (public data and collection sharing links). Authenticated requests will always result in file downloads, using the @download@ name. For example, the Workbench "preview" button and the "view entire log file" link will invoke file downloads instead of displaying content in the browser window.
133 # In the special case where you know you are immune to XSS exploits, you can enable the "trust all content" mode in Keep-web (with the @-trust-all-content@ command line flag) and Workbench (with the @trust_all_content@ item in @application.yml@). With both of these enabled, inline web content can be served from a single @collections@ host name; no wildcard DNS or certificate is needed. Do not do this without understanding the security implications described in the "Keep-web documentation":http://godoc.org/github.com/curoverse/arvados/services/keep-web.
135 h3. Tell Workbench about the Keep-web service
137 Workbench has features like "download file from collection" and "show image" which work better if the content is served by Keep-web rather than Workbench itself. We recommend using the two different hostnames ("download" and "collections" above) for file downloads and inline content respectively.
139 Add the following entry to your Workbench configuration file (@/etc/arvados/workbench/application.yml@). This URL will be used for file downloads.
142 <pre><code>keep_web_download_url: https://download.<span class="userinput">uuid_prefix</span>.your.domain/c=%{uuid_or_pdh}
146 Additionally, add *one* of the following entries to your Workbench configuration file, depending on your DNS setup. This URL will be used to serve user content that can be displayed in the browser, like image previews and static HTML pages.
149 <pre><code>keep_web_url: https://%{uuid_or_pdh}--collections.<span class="userinput">uuid_prefix</span>.your.domain
150 keep_web_url: https://%{uuid_or_pdh}.collections.<span class="userinput">uuid_prefix</span>.your.domain
151 keep_web_url: https://collections.<span class="userinput">uuid_prefix</span>.your.domain/c=%{uuid_or_pdh}