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<article class="md-content__inner md-typeset">
<h1 id="seafile-docker-cluster-deployment">Seafile Docker Cluster Deployment<a class="headerlink" href="#seafile-docker-cluster-deployment" title="Permanent link">&para;</a></h1>
<h2 id="architecture">Architecture<a class="headerlink" href="#architecture" title="Permanent link">&para;</a></h2>
<p>The Seafile cluster solution employs a 3-tier architecture:</p>
<ul>
<li>Load balancer tier: Distribute incoming traffic to Seafile servers. HA (high availability) can be achieved by deploying multiple load balancer instances.</li>
<li>Seafile server cluster: a cluster of Seafile server instances. If one instance fails, the load balancer will stop handing traffic to it. So HA is achieved.</li>
<li>Backend storage: Distributed storage cluster, e.g. S3, Openstack Swift or Ceph.</li>
</ul>
<p>This architecture scales horizontally. That means, you can handle more traffic by adding more machines. The architecture is visualized in the following picture.</p>
<p><img alt="seafile-cluster" src="../../images/seafile-cluster-arch.png" /></p>
<p>There are two main components on the Seafile server node: web server (Nginx/Apache) and Seafile app server. The web server passes requests from the clients to Seafile app server. The Seafile app servers work independently. They don't know about each other's state. That means each app server can fail independently without affecting other app server instances. The load balancer is responsible for detecting failure and re-routing requests.</p>
<p>Even though Seafile app servers work independently, they still have to share some session information. All shared session information is stored in memory cache. Thus, all Seafile app servers have to connect to the same memory cache server (cluster). Since Pro Edition 11.0, both memcached and Redis can be used as memory cache. Before 11.0, only memcached is supported. More details about memory cache configuration is available later. Since Seafile 13.0, we recommend that you use Redis as a cache to adapt to new features (such as Seafile AI, Metadata management, etc.).</p>
<p>The background server is the workhorse for various background tasks, including full-text indexing, office file preview, virus scanning, LDAP syncing. It should usually be run on a dedicated server for better performance. Currently only one background task server can be running in the entire cluster. If more than one background servers are running, they may conflict with each others when doing some tasks. If you need HA for background task server, you can consider using <a href="http://www.keepalived.org/">Keepalived</a> to build a hot backup for it.</p>
<p>In the seafile cluster, <strong>only one server</strong> should run the background tasks, including:</p>
<ul>
<li>indexing files for search</li>
<li>email notification</li>
<li>LDAP sync</li>
<li>virus scan</li>
</ul>
<p>Let's assume you have three nodes in your cluster: A, B, and C.</p>
<ul>
<li>Node A is backend node that run background tasks.</li>
<li>Node B and C are frontend nodes that serving requests from clients.</li>
</ul>
<p><img alt="cluster-nodes" src="../../images/cluster-nodes.png" /></p>
<h2 id="cluster-requirements">Cluster requirements<a class="headerlink" href="#cluster-requirements" title="Permanent link">&para;</a></h2>
<p>Please refer <a href="../system_requirements/#seafile-cluster">here</a> for the details about the cluster requirements for <strong>all nodes</strong> in Seafile cluster. In general, we recommend that each node should have at least 2G RAM and a 2-core CPU (&gt; 2GHz).</p>
<h2 id="deploy-seafile-service">Deploy Seafile service<a class="headerlink" href="#deploy-seafile-service" title="Permanent link">&para;</a></h2>
<h3 id="deploy-the-first-seafile-frontend-node">Deploy the first Seafile frontend node<a class="headerlink" href="#deploy-the-first-seafile-frontend-node" title="Permanent link">&para;</a></h3>
<ol>
<li>
<p>Create the mount directory</p>
<div class="highlight"><pre><span></span><code>mkdir<span class="w"> </span>-p<span class="w"> </span>/opt/seafile/shared
</code></pre></div>
</li>
<li>
<p>Pulling Seafile image</p>
<div class="highlight"><pre><span></span><code>docker<span class="w"> </span>pull<span class="w"> </span>seafileltd/seafile-pro-mc:13.0-latest
</code></pre></div>
</li>
<li>
<p>Download the <code>seafile-server.yml</code> and <code>.env</code></p>
<div class="highlight"><pre><span></span><code>wget<span class="w"> </span>-O<span class="w"> </span>.env<span class="w"> </span>https://manual.seafile.com/13.0/repo/docker/cluster/env
wget<span class="w"> </span>https://manual.seafile.com/13.0/repo/docker/cluster/seafile-server.yml
</code></pre></div>
</li>
<li>
<p>Modify the <a href="../../config/env/">variables</a> in <code>.env</code> (especially the terms like <code>&lt;...&gt;</code>). </p>
</li>
<li>
<p>Pleace license file</p>
<p>If you have a <code>seafile-license.txt</code> license file, simply put it in the volume of the Seafile container. The volumne's default path in the Compose file is <code>/opt/seafile/shared</code>. If you have modified the path, save the license file under your custom path.</p>
<div class="admonition danger">
<p class="admonition-title">If the license file has a different name or cannot be read, Seafile server will start with in trailer mode with most THREE users</p>
</div>
</li>
<li>
<p>Start the Seafile docker</p>
<div class="highlight"><pre><span></span><code>docker<span class="w"> </span>compose<span class="w"> </span>up<span class="w"> </span>-d
</code></pre></div>
<div class="admonition success">
<p class="admonition-title">Cluster init mode</p>
<p>Because <code>CLUSTER_INIT_MODE</code> is true in the <code>.env</code> file, Seafile docker will be started in init mode and generate configuration files. As the results, you can see the following lines if you trace the Seafile container (i.e., <code>docker logs seafile</code>):</p>
<div class="highlight"><pre><span></span><code>---------------------------------
This is your configuration
---------------------------------
server name: seafile
server ip/domain: seafile.example.com
seafile data dir: /opt/seafile/seafile-data
fileserver port: 8082
database: create new
ccnet database: ccnet_db
seafile database: seafile_db
seahub database: seahub_db
database user: seafile
Generating seafile configuration ...
done
Generating seahub configuration ...
-----------------------------------------------------------------
Your seafile server configuration has been finished successfully.
-----------------------------------------------------------------
[2024-11-21 02:22:37] Updating version stamp
Start init
Init success
</code></pre></div>
</div>
</li>
<li>
<p>After initailizing the cluster, the following fields can be removed in <code>.env</code></p>
<ul>
<li><code>CLUSTER_INIT_MODE</code>, must be removed from .env file</li>
<li><code>CLUSTER_INIT_ES_HOST</code></li>
<li><code>CLUSTER_INIT_ES_PORT</code></li>
</ul>
<div class="admonition tip">
<p class="admonition-title">Tip</p>
<p>We recommend that you check that the relevant configuration files are correct and copy the <code>SEAFILE_VOLUME</code> directory before the service is officially started, because only the configuration files are generated after initialization. You can directly migrate the entire copied <code>SEAFILE_VOLUME</code> to other nodes later:</p>
<div class="highlight"><pre><span></span><code>cp<span class="w"> </span>-r<span class="w"> </span>/opt/seafile/shared<span class="w"> </span>/opt/seafile/shared-bak
</code></pre></div>
</div>
</li>
<li>
<p>Restart the container to start the service in frontend node</p>
<div class="highlight"><pre><span></span><code>docker<span class="w"> </span>compose<span class="w"> </span>down
docker<span class="w"> </span>compose<span class="w"> </span>up<span class="w"> </span>-d
</code></pre></div>
<div class="admonition success">
<p class="admonition-title">Frontend node starts successfully</p>
<p>After executing the above command, you can trace the logs of container <code>seafile</code> (i.e., <code>docker logs seafile</code>). You can see the following message if the frontend node starts successfully:</p>
<div class="highlight"><pre><span></span><code>*** Running /etc/my_init.d/01_create_data_links.sh...
*** Booting runit daemon...
*** Runit started as PID 20
*** Running /scripts/enterpoint.sh...
2024-11-21 03:02:35 Nginx ready
2024-11-21 03:02:35 This is an idle script (infinite loop) to keep container running.
---------------------------------
Seafile cluster frontend mode
---------------------------------
Starting seafile server, please wait ...
Seafile server started
Done.
Starting seahub at port 8000 ...
Seahub is started
Done.
</code></pre></div>
</div>
</li>
</ol>
<h3 id="deploy-the-others-seafile-frontend-nodes">Deploy the others Seafile frontend nodes<a class="headerlink" href="#deploy-the-others-seafile-frontend-nodes" title="Permanent link">&para;</a></h3>
<ol>
<li>
<p>Create the mount directory</p>
<div class="highlight"><pre><span></span><code>$ mkdir -p /opt/seafile/shared
</code></pre></div>
</li>
<li>
<p>Pull Seafile image</p>
</li>
<li>
<p>Copy <code>seafile-server.yml</code>, <code>.env</code>and configuration files from the first frontend node</p>
</li>
<li>
<p>Start the service</p>
<div class="highlight"><pre><span></span><code>docker<span class="w"> </span>compose<span class="w"> </span>up<span class="w"> </span>-d
</code></pre></div>
</li>
</ol>
<h3 id="deploy-seafile-backend-node">Deploy seafile backend node<a class="headerlink" href="#deploy-seafile-backend-node" title="Permanent link">&para;</a></h3>
<ol>
<li>
<p>Create the mount directory</p>
<div class="highlight"><pre><span></span><code>$ mkdir -p /opt/seafile/shared
</code></pre></div>
</li>
<li>
<p>Pull Seafile image</p>
</li>
<li>
<p>Copy <code>seafile-server.yml</code>, <code>.env</code> and configuration files from frontend node</p>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>The configuration files from frontend node have to be put in the same path as the frontend node, i.e., <code>/opt/seafile/shared/seafile/conf/*</code></p>
</div>
</li>
<li>
<p>Modify <code>.env</code>, set <code>CLUSTER_MODE</code> to <code>backend</code></p>
</li>
<li>
<p>Start the service in the backend node</p>
<div class="highlight"><pre><span></span><code>docker<span class="w"> </span>compose<span class="w"> </span>up<span class="w"> </span>-d
</code></pre></div>
<div class="admonition success">
<p class="admonition-title">Backend node starts successfully</p>
<p>After executing the above command, you can trace the logs of container <code>seafile</code> (i.e., <code>docker logs seafile</code>). You can see the following message if the backend node starts successfully:</p>
<div class="highlight"><pre><span></span><code>*** Running /etc/my_init.d/01_create_data_links.sh...
*** Booting runit daemon...
*** Runit started as PID 21
*** Running /scripts/enterpoint.sh...
2024-11-21 03:11:59 Nginx ready
2024-11-21 03:11:59 This is an idle script (infinite loop) to keep container running.
---------------------------------
Seafile cluster backend mode
---------------------------------
Starting seafile server, please wait ...
Seafile server started
Done.
Starting seafile background tasks ...
Done.
</code></pre></div>
</div>
</li>
</ol>
<h2 id="deploy-load-balance-optional">Deploy load balance (Optional)<a class="headerlink" href="#deploy-load-balance-optional" title="Permanent link">&para;</a></h2>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>Since Seafile Pro server 6.0.0, cluster deployment requires "sticky session" settings in the load balancer. Otherwise sometimes folder download on the web UI can't work properly. Read the "Load Balancer Setting" section below for details</p>
</div>
<p>Generally speaking, in order to better access the Seafile service, we recommend that you use a load balancing service to access the Seafile cluster and bind your domain name (such as <code>seafile.cluster.com</code>) to the load balancing service. Usually, you can use:</p>
<ul>
<li>Cloud service provider's load balancing service (e.g., <strong><em>AWS Elastic Load Balancer</em></strong>)</li>
<li>
<p>Deploy your own load balancing service, our document will give two of common load balance services:</p>
<ul>
<li><strong><em>Nginx</em></strong></li>
<li><strong><em>HAproxy</em></strong></li>
</ul>
</li>
</ul>
<h3 id="aws-elastic-load-balancer-elb">AWS Elastic Load Balancer (ELB)<a class="headerlink" href="#aws-elastic-load-balancer-elb" title="Permanent link">&para;</a></h3>
<p>In the AWS ELB management console, after you've added the Seafile server instances to the instance list, you should do two more configurations.</p>
<p>First you should setup HTTP(S) listeners. Ports 443 and 80 of ELB should be forwarded to the ports 80 or 443 of the Seafile servers.</p>
<p>Then you setup health check</p>
<p><img alt="elb-health-check" src="../../images/elb-health-check.png" /></p>
<p>Refer to <a href="http://docs.aws.amazon.com/elasticloadbalancing/latest/classic/elb-sticky-sessions.html">AWS documentation</a> about how to setup sticky sessions.</p>
<h3 id="nginx">Nginx<a class="headerlink" href="#nginx" title="Permanent link">&para;</a></h3>
<ol>
<li>
<p>Install Nginx in the host if you would like to deploy load balance service</p>
<div class="highlight"><pre><span></span><code>sudo<span class="w"> </span>apt<span class="w"> </span>update
sudo<span class="w"> </span>apt<span class="w"> </span>install<span class="w"> </span>nginx
</code></pre></div>
</li>
<li>
<p>Create the configurations file for Seafile cluster</p>
<div class="highlight"><pre><span></span><code>sudo<span class="w"> </span>nano<span class="w"> </span>/etc/nginx/sites-available/seafile-cluster
</code></pre></div>
<p>and, add the following contents into this file:</p>
<div class="highlight"><pre><span></span><code><span class="k">upstream</span><span class="w"> </span><span class="s">seafile_cluster</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="kn">server</span><span class="w"> </span><span class="s">&lt;IP:</span><span class="w"> </span><span class="s">your</span><span class="w"> </span><span class="s">frontend</span><span class="w"> </span><span class="s">node</span><span class="w"> </span><span class="mi">1</span><span class="s">&gt;:80</span><span class="p">;</span>
<span class="w"> </span><span class="kn">server</span><span class="w"> </span><span class="s">&lt;IP:</span><span class="w"> </span><span class="s">your</span><span class="w"> </span><span class="s">frontend</span><span class="w"> </span><span class="s">node</span><span class="w"> </span><span class="mi">2</span><span class="s">&gt;:80</span><span class="p">;</span>
<span class="w"> </span><span class="kn">...</span>
<span class="err">}</span>
<span class="s">server</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="kn">listen</span><span class="w"> </span><span class="mi">80</span><span class="p">;</span>
<span class="w"> </span><span class="kn">server_name</span><span class="w"> </span><span class="s">&lt;your</span><span class="w"> </span><span class="s">domain&gt;</span><span class="p">;</span>
<span class="w"> </span><span class="kn">location</span><span class="w"> </span><span class="s">/</span><span class="w"> </span><span class="p">{</span>
<span class="w"> </span><span class="kn">proxy_pass</span><span class="w"> </span><span class="s">http://seafile_cluster</span><span class="p">;</span>
<span class="w"> </span><span class="kn">proxy_set_header</span><span class="w"> </span><span class="s">Host</span><span class="w"> </span><span class="nv">$host</span><span class="p">;</span>
<span class="w"> </span><span class="kn">proxy_set_header</span><span class="w"> </span><span class="s">X-Real-IP</span><span class="w"> </span><span class="nv">$remote_addr</span><span class="p">;</span>
<span class="w"> </span><span class="kn">proxy_set_header</span><span class="w"> </span><span class="s">X-Forwarded-For</span><span class="w"> </span><span class="nv">$proxy_add_x_forwarded_for</span><span class="p">;</span>
<span class="w"> </span><span class="kn">proxy_set_header</span><span class="w"> </span><span class="s">X-Forwarded-Proto</span><span class="w"> </span><span class="nv">$scheme</span><span class="p">;</span>
<span class="w"> </span><span class="kn">http_502</span><span class="w"> </span><span class="s">http_503</span><span class="w"> </span><span class="s">http_504</span><span class="p">;</span>
<span class="w"> </span><span class="p">}</span>
<span class="p">}</span>
</code></pre></div>
</li>
<li>
<p>Link the configurations file to <code>sites-enabled</code> directory:</p>
<div class="highlight"><pre><span></span><code>sudo<span class="w"> </span>ln<span class="w"> </span>-s<span class="w"> </span>/etc/nginx/sites-available/seafile-cluster<span class="w"> </span>/etc/nginx/sites-enabled/
</code></pre></div>
</li>
<li>
<p>Test and enable configuration</p>
<div class="highlight"><pre><span></span><code>sudo<span class="w"> </span>nginx<span class="w"> </span>-t
sudo<span class="w"> </span>nginx<span class="w"> </span>-s<span class="w"> </span>reload
</code></pre></div>
</li>
</ol>
<h3 id="haproxy-and-keepalived-services">HAproxy and Keepalived services<a class="headerlink" href="#haproxy-and-keepalived-services" title="Permanent link">&para;</a></h3>
<p>Execute the following commands on the two Seafile frontend servers:</p>
<div class="highlight"><pre><span></span><code>$ apt install haproxy keepalived -y
$ mv /etc/haproxy/haproxy.cfg /etc/haproxy/haproxy.cfg.bak
$ cat &gt; /etc/haproxy/haproxy.cfg &lt;&lt; &#39;EOF&#39;
global
log 127.0.0.1 local1 notice
maxconn 4096
user haproxy
group haproxy
defaults
log global
mode http
retries 3
timeout connect 10000
timeout client 300000
timeout server 36000000
listen seafile 0.0.0.0:80
mode http
option httplog
option dontlognull
option forwardfor
cookie SERVERID insert indirect nocache
server seafile01 Front-End01-IP:8001 check port 11001 cookie seafile01
server seafile02 Front-End02-IP:8001 check port 11001 cookie seafile02
EOF
</code></pre></div>
<div class="admonition warning">
<p class="admonition-title">Warning</p>
<p>Please <strong>correctly</strong> modify the IP address (<code>Front-End01-IP</code> and <code>Front-End02-IP</code>) of the frontend server in the above configuration file. Other wise it cannot work properly.</p>
</div>
<p><strong>Choose one of the above two servers as the master node, and the other as the slave node.</strong></p>
<p>Perform the following operations on the master node:</p>
<div class="highlight"><pre><span></span><code>$<span class="w"> </span>cat<span class="w"> </span>&gt;<span class="w"> </span>/etc/keepalived/keepalived.conf<span class="w"> </span><span class="s">&lt;&lt; &#39;EOF&#39;</span>
<span class="s">! Configuration File for keepalived</span>
<span class="s">global_defs {</span>
<span class="s"> notification_email {</span>
<span class="s"> root@localhost</span>
<span class="s"> }</span>
<span class="s"> notification_email_from keepalived@localhost</span>
<span class="s"> smtp_server 127.0.0.1</span>
<span class="s"> smtp_connect_timeout 30</span>
<span class="s"> router_id node1</span>
<span class="s"> vrrp_mcast_group4 224.0.100.18</span>
<span class="s">}</span>
<span class="s">vrrp_instance VI_1 {</span>
<span class="s"> state MASTER</span>
<span class="s"> interface eno1 # Set to the device name of a valid network interface on the current server, and the virtual IP will be bound to the network interface</span>
<span class="s"> virtual_router_id 50</span>
<span class="s"> priority 100</span>
<span class="s"> advert_int 1</span>
<span class="s"> authentication {</span>
<span class="s"> auth_type PASS</span>
<span class="s"> auth_pass seafile123</span>
<span class="s"> }</span>
<span class="s"> virtual_ipaddress {</span>
<span class="s"> 172.26.154.45/24 dev eno1 # Configure to the correct virtual IP and network interface device name</span>
<span class="s"> }</span>
<span class="s">}</span>
<span class="s">EOF</span>
</code></pre></div>
<div class="admonition warning">
<p class="admonition-title">Warning</p>
<p>Please <strong>correctly</strong> configure the virtual IP address and network interface device name in the above file. Other wise it cannot work properly.</p>
</div>
<p>Perform the following operations on the standby node:</p>
<div class="highlight"><pre><span></span><code>$<span class="w"> </span>cat<span class="w"> </span>&gt;<span class="w"> </span>/etc/keepalived/keepalived.conf<span class="w"> </span><span class="s">&lt;&lt; &#39;EOF&#39;</span>
<span class="s">! Configuration File for keepalived</span>
<span class="s">global_defs {</span>
<span class="s"> notification_email {</span>
<span class="s"> root@localhost</span>
<span class="s"> }</span>
<span class="s"> notification_email_from keepalived@localhost</span>
<span class="s"> smtp_server 127.0.0.1</span>
<span class="s"> smtp_connect_timeout 30</span>
<span class="s"> router_id node2</span>
<span class="s"> vrrp_mcast_group4 224.0.100.18</span>
<span class="s">}</span>
<span class="s">vrrp_instance VI_1 {</span>
<span class="s"> state BACKUP</span>
<span class="s"> interface eno1 # Set to the device name of a valid network interface on the current server, and the virtual IP will be bound to the network interface</span>
<span class="s"> virtual_router_id 50</span>
<span class="s"> priority 98</span>
<span class="s"> advert_int 1</span>
<span class="s"> authentication {</span>
<span class="s"> auth_type PASS</span>
<span class="s"> auth_pass seafile123</span>
<span class="s"> }</span>
<span class="s"> virtual_ipaddress {</span>
<span class="s"> 172.26.154.45/24 dev eno1 # Configure to the correct virtual IP and network interface device name</span>
<span class="s"> }</span>
<span class="s">}</span>
<span class="s">EOF</span>
</code></pre></div>
<p>Finally, run the following commands on the two Seafile frontend servers to start the corresponding services:</p>
<div class="highlight"><pre><span></span><code>$ systemctl enable --now haproxy
$ systemctl enable --now keepalived
</code></pre></div>
<p>So far, Seafile cluster has been deployed.</p>
<h2 id="https">HTTPS<a class="headerlink" href="#https" title="Permanent link">&para;</a></h2>
<p>You can engaged HTTPS in your load balance service, as you can use certificates manager (e.g., <a href="https://certbot.eff.org">Certbot</a>) to acquire and enable HTTPS to your Seafile cluster. You have to modify the relative URLs from the prefix <code>http://</code> to <code>https://</code> in <code>seahub_settings.py</code> and <code>.env</code>, after enabling HTTPS.</p>
<h2 id="optional-deploy-seadoc-server">(Optional) Deploy SeaDoc server<a class="headerlink" href="#optional-deploy-seadoc-server" title="Permanent link">&para;</a></h2>
<p>You can follow <a href="../../extension/setup_seadoc/">here</a> to deploy SeaDoc server. And then modify <code>SEADOC_SERVER_URL</code> in your <code>.env</code> file</p>
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