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Copy ceph conf file and client keyring
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Install Python Ceph Library
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Troubleshooting librados incompatibility issues
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<h1 id="setup-with-ceph">Setup With Ceph<a class="headerlink" href="#setup-with-ceph" title="Permanent link">&para;</a></h1>
<p>Ceph is a scalable distributed storage system. It's recommended to use Ceph's S3 Gateway (RGW) to integarte with Seafile. Seafile can also use Ceph's RADOS object storage layer for storage backend. But using RADOS requires to link with librados library, which may introduce library incompatibility issues during deployment. Furthermore the S3 Gateway provides easier to manage HTTP based interface. If you want to integrate with S3 gateway, please refer to "Use S3-compatible Object Storage" section in <a href="../setup_with_amazon_s3/">this documentation</a>. The documentation below is for integrating with RADOS.</p>
<h2 id="copy-ceph-conf-file-and-client-keyring">Copy ceph conf file and client keyring<a class="headerlink" href="#copy-ceph-conf-file-and-client-keyring" title="Permanent link">&para;</a></h2>
<p>Seafile acts as a client to Ceph/RADOS, so it needs to access ceph cluster's conf file and keyring. You have to copy these files from a ceph admin node's /etc/ceph directory to the seafile machine.</p>
<div class="codehilite"><pre><span></span><code><span class="n">seafile</span><span class="o">-</span><span class="n">machine</span><span class="err">#</span><span class="w"> </span><span class="n">sudo</span><span class="w"> </span><span class="n">scp</span><span class="w"> </span><span class="k">user</span><span class="nv">@ceph</span><span class="o">-</span><span class="k">admin</span><span class="o">-</span><span class="nl">node</span><span class="p">:</span><span class="o">/</span><span class="n">etc</span><span class="o">/</span><span class="n">ceph</span><span class="o">/</span><span class="w"> </span><span class="o">/</span><span class="n">etc</span>
</code></pre></div>
<h2 id="install-and-enable-memcached">Install and enable memcached<a class="headerlink" href="#install-and-enable-memcached" title="Permanent link">&para;</a></h2>
<p>For best performance, Seafile requires install memcached or redis and enable cache for objects. </p>
<p>We recommend to allocate at least 128MB memory for object cache.</p>
<h2 id="install-python-ceph-library">Install Python Ceph Library<a class="headerlink" href="#install-python-ceph-library" title="Permanent link">&para;</a></h2>
<p>File search and WebDAV functions rely on Python Ceph library installed in the system.</p>
<p>On Debian/Ubuntu (Seafile 7.1+):</p>
<div class="codehilite"><pre><span></span><code>sudo apt-get install python3-rados
</code></pre></div>
<p>On Debian/Ubuntu (Seafile 7.0 or below):</p>
<div class="codehilite"><pre><span></span><code>sudo apt-get install python-ceph
</code></pre></div>
<p>On RedHat/CentOS (Seafile 7.0 or below):</p>
<div class="codehilite"><pre><span></span><code>sudo yum install python-rados
</code></pre></div>
<h2 id="edit-seafile-configuration">Edit seafile configuration<a class="headerlink" href="#edit-seafile-configuration" title="Permanent link">&para;</a></h2>
<p>Edit <code>seafile.conf</code>, add the following lines:</p>
<div class="codehilite"><pre><span></span><code><span class="k">[block_backend]</span>
<span class="na">name</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">ceph</span>
<span class="na">ceph_config</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">/etc/ceph/ceph.conf</span>
<span class="na">pool</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">seafile-blocks</span>
<span class="k">[commit_object_backend]</span>
<span class="na">name</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">ceph</span>
<span class="na">ceph_config</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">/etc/ceph/ceph.conf</span>
<span class="na">pool</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">seafile-commits</span>
<span class="k">[fs_object_backend]</span>
<span class="na">name</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">ceph</span>
<span class="na">ceph_config</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">/etc/ceph/ceph.conf</span>
<span class="na">pool</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">seafile-fs</span>
</code></pre></div>
<p>You also need to add <a href="/config/seafile-conf/#cache-pro-edition-only">memory cache configurations</a>.</p>
<p>It's required to create separate pools for commit, fs, and block objects.</p>
<div class="codehilite"><pre><span></span><code>ceph-admin-node# rados mkpool seafile-blocks
ceph-admin-node# rados mkpool seafile-commits
ceph-admin-node# rados mkpool seafile-fs
</code></pre></div>
<h2 id="troubleshooting-librados-incompatibility-issues">Troubleshooting librados incompatibility issues<a class="headerlink" href="#troubleshooting-librados-incompatibility-issues" title="Permanent link">&para;</a></h2>
<p>Since 8.0 version, Seafile bundles librados from Ceph 16. On some systems you may find Seafile fail to connect to your Ceph cluster. In such case, you can usually solve it by removing the bundled librados libraries and use the one installed in the OS.</p>
<p>To do this, you have to remove a few bundled libraries:</p>
<div class="codehilite"><pre><span></span><code>cd seafile-server-latest/seafile/lib
rm librados.so.2 libstdc++.so.6 libnspr4.so
</code></pre></div>
<h2 id="use-arbitary-ceph-user">Use arbitary Ceph user<a class="headerlink" href="#use-arbitary-ceph-user" title="Permanent link">&para;</a></h2>
<p>The above configuration will use the default (client.admin) user to connect to Ceph.
You may want to use some other Ceph user to connect. This is supported in Seafile.
To specify the Ceph user, you have to add a <code>ceph_client_id</code> option to seafile.conf, as the following:</p>
<div class="codehilite"><pre><span></span><code><span class="k">[block_backend]</span>
<span class="na">name</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">ceph</span>
<span class="na">ceph_config</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">/etc/ceph/ceph.conf</span>
<span class="c1"># Sepcify Ceph user for Seafile here</span>
<span class="na">ceph_client_id</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">seafile</span>
<span class="na">pool</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">seafile-blocks</span>
<span class="k">[commit_object_backend]</span>
<span class="na">name</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">ceph</span>
<span class="na">ceph_config</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">/etc/ceph/ceph.conf</span>
<span class="c1"># Sepcify Ceph user for Seafile here</span>
<span class="na">ceph_client_id</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">seafile</span>
<span class="na">pool</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">seafile-commits</span>
<span class="k">[fs_object_backend]</span>
<span class="na">name</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">ceph</span>
<span class="na">ceph_config</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">/etc/ceph/ceph.conf</span>
<span class="c1"># Sepcify Ceph user for Seafile here</span>
<span class="na">ceph_client_id</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">seafile</span>
<span class="na">pool</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">seafile-fs</span>
<span class="c1"># Memcached or Reids configs</span>
<span class="na">......</span>
</code></pre></div>
<p>You can create a ceph user for seafile on your ceph cluster like this:</p>
<div class="codehilite"><pre><span></span><code>ceph auth add client.seafile \
mds &#39;allow&#39; \
mon &#39;allow r&#39; \
osd &#39;allow rwx pool=seafile-blocks, allow rwx pool=seafile-commits, allow rwx pool=seafile-fs&#39;
</code></pre></div>
<p>You also have to add this user's keyring path to /etc/ceph/ceph.conf:</p>
<div class="codehilite"><pre><span></span><code><span class="k">[client.seafile]</span>
<span class="na">keyring</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">&lt;path to user&#39;s keyring file&gt;</span>
</code></pre></div>
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