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| <div class="section" id="installing-cassandra"> |
| <h1>Installing Cassandra<a class="headerlink" href="#installing-cassandra" title="Permalink to this headline">¶</a></h1> |
| <div class="section" id="prerequisites"> |
| <h2>Prerequisites<a class="headerlink" href="#prerequisites" title="Permalink to this headline">¶</a></h2> |
| <ul class="simple"> |
| <li>The latest version of Java 8, either the <a class="reference external" href="http://www.oracle.com/technetwork/java/javase/downloads/index.html">Oracle Java Standard Edition 8</a> or <a class="reference external" href="http://openjdk.java.net/">OpenJDK 8</a>. To |
| verify that you have the correct version of java installed, type <code class="docutils literal notranslate"><span class="pre">java</span> <span class="pre">-version</span></code>.</li> |
| <li>For using cqlsh, the latest version of <a class="reference external" href="https://www.python.org/downloads/">Python 2.7</a>. To verify that you have |
| the correct version of Python installed, type <code class="docutils literal notranslate"><span class="pre">python</span> <span class="pre">--version</span></code>.</li> |
| </ul> |
| </div> |
| <div class="section" id="installation-from-binary-tarball-files"> |
| <h2>Installation from binary tarball files<a class="headerlink" href="#installation-from-binary-tarball-files" title="Permalink to this headline">¶</a></h2> |
| <ul class="simple"> |
| <li>Download the latest stable release from the <a class="reference external" href="http://cassandra.apache.org/download/">Apache Cassandra downloads website</a>.</li> |
| <li>Untar the file somewhere, for example:</li> |
| </ul> |
| <div class="highlight-none notranslate"><div class="highlight"><pre><span></span>tar -xvf apache-cassandra-3.6-bin.tar.gz cassandra |
| </pre></div> |
| </div> |
| <p>The files will be extracted into <code class="docutils literal notranslate"><span class="pre">apache-cassandra-3.6</span></code>, you need to substitute 3.6 with the release number that you |
| have downloaded.</p> |
| <ul class="simple"> |
| <li>Optionally add <code class="docutils literal notranslate"><span class="pre">apache-cassandra-3.6\bin</span></code> to your path.</li> |
| <li>Start Cassandra in the foreground by invoking <code class="docutils literal notranslate"><span class="pre">bin/cassandra</span> <span class="pre">-f</span></code> from the command line. Press “Control-C” to stop |
| Cassandra. Start Cassandra in the background by invoking <code class="docutils literal notranslate"><span class="pre">bin/cassandra</span></code> from the command line. Invoke <code class="docutils literal notranslate"><span class="pre">kill</span> <span class="pre">pid</span></code> |
| or <code class="docutils literal notranslate"><span class="pre">pkill</span> <span class="pre">-f</span> <span class="pre">CassandraDaemon</span></code> to stop Cassandra, where pid is the Cassandra process id, which you can find for |
| example by invoking <code class="docutils literal notranslate"><span class="pre">pgrep</span> <span class="pre">-f</span> <span class="pre">CassandraDaemon</span></code>.</li> |
| <li>Verify that Cassandra is running by invoking <code class="docutils literal notranslate"><span class="pre">bin/nodetool</span> <span class="pre">status</span></code> from the command line.</li> |
| <li>Configuration files are located in the <code class="docutils literal notranslate"><span class="pre">conf</span></code> sub-directory.</li> |
| <li>Since Cassandra 2.1, log and data directories are located in the <code class="docutils literal notranslate"><span class="pre">logs</span></code> and <code class="docutils literal notranslate"><span class="pre">data</span></code> sub-directories respectively. |
| Older versions defaulted to <code class="docutils literal notranslate"><span class="pre">/var/log/cassandra</span></code> and <code class="docutils literal notranslate"><span class="pre">/var/lib/cassandra</span></code>. Due to this, it is necessary to either |
| start Cassandra with root privileges or change <code class="docutils literal notranslate"><span class="pre">conf/cassandra.yaml</span></code> to use directories owned by the current user, |
| as explained below in the section on changing the location of directories.</li> |
| </ul> |
| </div> |
| <div class="section" id="installation-from-debian-packages"> |
| <h2>Installation from Debian packages<a class="headerlink" href="#installation-from-debian-packages" title="Permalink to this headline">¶</a></h2> |
| <ul class="simple"> |
| <li>Add the Apache repository of Cassandra to <code class="docutils literal notranslate"><span class="pre">/etc/apt/sources.list.d/cassandra.sources.list</span></code>, for example for version |
| 3.6:</li> |
| </ul> |
| <div class="highlight-none notranslate"><div class="highlight"><pre><span></span>echo "deb https://downloads.apache.org/cassandra/debian 36x main" | sudo tee -a /etc/apt/sources.list.d/cassandra.sources.list |
| </pre></div> |
| </div> |
| <ul class="simple"> |
| <li>Add the Apache Cassandra repository keys:</li> |
| </ul> |
| <div class="highlight-none notranslate"><div class="highlight"><pre><span></span>curl https://downloads.apache.org/cassandra/KEYS | sudo apt-key add - |
| </pre></div> |
| </div> |
| <ul class="simple"> |
| <li>Update the repositories:</li> |
| </ul> |
| <div class="highlight-none notranslate"><div class="highlight"><pre><span></span>sudo apt-get update |
| </pre></div> |
| </div> |
| <ul class="simple"> |
| <li>If you encounter this error:</li> |
| </ul> |
| <div class="highlight-none notranslate"><div class="highlight"><pre><span></span>GPG error: http://www.apache.org 36x InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY A278B781FE4B2BDA |
| </pre></div> |
| </div> |
| <p>Then add the public key A278B781FE4B2BDA as follows:</p> |
| <div class="highlight-none notranslate"><div class="highlight"><pre><span></span>sudo apt-key adv --keyserver pool.sks-keyservers.net --recv-key A278B781FE4B2BDA |
| </pre></div> |
| </div> |
| <p>and repeat <code class="docutils literal notranslate"><span class="pre">sudo</span> <span class="pre">apt-get</span> <span class="pre">update</span></code>. The actual key may be different, you get it from the error message itself. For a |
| full list of Apache contributors public keys, you can refer to <a class="reference external" href="https://downloads.apache.org/cassandra/KEYS">this link</a>.</p> |
| <ul class="simple"> |
| <li>Install Cassandra:</li> |
| </ul> |
| <div class="highlight-none notranslate"><div class="highlight"><pre><span></span>sudo apt-get install cassandra |
| </pre></div> |
| </div> |
| <ul class="simple"> |
| <li>You can start Cassandra with <code class="docutils literal notranslate"><span class="pre">sudo</span> <span class="pre">service</span> <span class="pre">cassandra</span> <span class="pre">start</span></code> and stop it with <code class="docutils literal notranslate"><span class="pre">sudo</span> <span class="pre">service</span> <span class="pre">cassandra</span> <span class="pre">stop</span></code>. |
| However, normally the service will start automatically. For this reason be sure to stop it if you need to make any |
| configuration changes.</li> |
| <li>Verify that Cassandra is running by invoking <code class="docutils literal notranslate"><span class="pre">nodetool</span> <span class="pre">status</span></code> from the command line.</li> |
| <li>The default location of configuration files is <code class="docutils literal notranslate"><span class="pre">/etc/cassandra</span></code>.</li> |
| <li>The default location of log and data directories is <code class="docutils literal notranslate"><span class="pre">/var/log/cassandra/</span></code> and <code class="docutils literal notranslate"><span class="pre">/var/lib/cassandra</span></code>.</li> |
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