X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/9ac37f367da0b11971f2ecf8a80a38ae60d43a61..6a983720b3d1ee8e613bf3902e69fd14f505b995:/doc/install/install-keepproxy.html.textile.liquid

diff --git a/doc/install/install-keepproxy.html.textile.liquid b/doc/install/install-keepproxy.html.textile.liquid
index 646b6433a9..9e8f878782 100644
--- a/doc/install/install-keepproxy.html.textile.liquid
+++ b/doc/install/install-keepproxy.html.textile.liquid
@@ -23,11 +23,10 @@ h2. Install Keepproxy
 First add the Arvados apt repository, and then install the Keepproxy package.
 
 <notextile>
-<pre><code>~$ <span class="userinput">echo "# apt.arvados.org" > /etc/apt/sources.list.d/apt.arvados.org.list</span>
-~$ <span class="userinput">echo "deb http://apt.arvados.org/ wheezy main" >> /etc/apt/sources.list.d/apt.arvados.org.list</span>
-~$ <span class="userinput">/usr/bin/apt-key adv --keyserver pool.sks-keyservers.net --recv 1078ECD7</span>
-~$ <span class="userinput">/usr/bin/apt-get update</span>
-~$ <span class="userinput">/usr/bin/apt-get install keepproxy</span>
+<pre><code>~$ <span class="userinput">echo "deb http://apt.arvados.org/ wheezy main" | sudo tee /etc/apt/sources.list.d/apt.arvados.org.list</span>
+~$ <span class="userinput">sudo /usr/bin/apt-key adv --keyserver pool.sks-keyservers.net --recv 1078ECD7</span>
+~$ <span class="userinput">sudo /usr/bin/apt-get update</span>
+~$ <span class="userinput">sudo /usr/bin/apt-get install keepproxy</span>
 </code></pre>
 </notextile>
 
@@ -65,6 +64,21 @@ Because the Keepproxy is intended for access from anywhere on the internet, it i
 
 This is best achieved by putting a reverse proxy with SSL support in front of Keepproxy. Keepproxy itself runs on port 25107 by default; your reverse proxy can run on port 443 and pass requests to Keepproxy on port 25107.
 
+If possible, the proxy should be configured to add CORS headers to its own error responses -- otherwise in-browser applications can't report proxy errors. For example, in nginx >= 1.7.5:
+
+<notextile><pre>
+server {
+  server_name keep.example.com
+  ...
+  add_header 'Access-Control-Allow-Methods' 'GET, HEAD, POST, PUT, OPTIONS' always
+  add_header 'Access-Control-Allow-Origin' '*' always
+  add_header 'Access-Control-Allow-Headers' 'Authorization, Content-Length, Content-Type, X-Keep-Desired-Replicas' always
+  add_header 'Access-Control-Max-Age' '86486400' always
+}
+</pre></notextile>
+
+*Warning:* Make sure you don't inadvertently add CORS headers for services _other than keepproxy_ while you're doing this.
+
 h3. Tell the API server about the Keepproxy server
 
 The API server needs to be informed about the presence of your Keepproxy server. Please execute the following commands on your <strong>shell server</strong>.