cloudstack/docs/en-US/management-server-install-db-external.xml

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<section id="management-server-install-db-external">
  <title>Install the Database on a Separate Node</title>
  <para>This section describes how to install MySQL on a standalone machine, separate from the
    Management Server. This technique is intended for a deployment that includes several Management
    Server nodes. If you have a single-node Management Server deployment, you will typically use the
    same node for MySQL. See <xref linkend="management-server-install-db-local"/>.</para>
  <note>
    <para>The management server doesn't require a specific distribution for the MySQL node. You can
      use a distribution or Operating System of your choice. Using the same distribution as the
      management server is recommended, but not required. See <xref
        linkend="management-server-system-requirements"/>.</para>
  </note>
  <orderedlist>
    <listitem>
      <para>Install MySQL from the package repository from your distribution:</para>
      <para condition="community">On RHEL or CentOS:</para>
      <programlisting language="Bash">yum install mysql-server</programlisting>
      <para condition="community">On Ubuntu:</para>
      <programlisting language="Bash">apt-get install mysql-server</programlisting>
    </listitem>
    <listitem>
      <para>Edit the MySQL configuration (/etc/my.cnf or /etc/mysql/my.cnf, depending on your OS)
        and insert the following lines in the [mysqld] section. You can put these lines below the
        datadir line. The max_connections parameter should be set to 350 multiplied by the number of
        Management Servers you are deploying. This example assumes two Management Servers.</para>
      <note>
        <para>On Ubuntu, you can also create /etc/mysql/conf.d/cloudstack.cnf file and add these
          directives there. Don't forget to add [mysqld] on the first line of the file.</para>
      </note>
      <programlisting language="Bash">innodb_rollback_on_timeout=1
innodb_lock_wait_timeout=600
max_connections=700
log-bin=mysql-bin
binlog-format = 'ROW'
bind-address = 0.0.0.0</programlisting>
    </listitem>
    <listitem>
      <para>Start or restart MySQL to put the new configuration into effect.</para>
      <para>On RHEL/CentOS, MySQL doesn't automatically start after installation. Start it
        manually.</para>
      <programlisting language="Bash">service mysqld start</programlisting>
      <para>On Ubuntu, restart MySQL.</para>
      <programlisting language="Bash">service mysqld restart</programlisting>
    </listitem>
    <listitem>
      <para>(CentOS and RHEL only; not required on Ubuntu)</para>
      <warning>
        <para>On RHEL and CentOS, MySQL does not set a root password by default. It is very strongly
          recommended that you set a root password as a security precaution.</para>
      </warning>
      <para>Run the following command to secure your installation. You can answer "Y" to all
        questions except "Disallow root login remotely?". Remote root login is required to set up
        the databases.</para>
      <programlisting language="Bash">mysql_secure_installation</programlisting>
    </listitem>
    <listitem>
      <para>If a firewall is present on the system, open TCP port 3306 so external MySQL connections
        can be established.</para>
      <para>On Ubuntu, UFW is the default firewall. Open the port with this command:</para>
      <programlisting language="Bash">ufw allow mysql</programlisting>
      <para>On RHEL/CentOS:</para>
      <orderedlist numeration="loweralpha">
        <listitem>
          <para>Edit the /etc/sysconfig/iptables file and add the following line at the beginning of
            the INPUT chain.</para>
          <programlisting language="Bash">-A INPUT -p tcp --dport 3306 -j ACCEPT</programlisting>
        </listitem>
        <listitem>
          <para>Now reload the iptables rules.</para>
          <programlisting language="Bash">service iptables restart</programlisting>
        </listitem>
      </orderedlist>
    </listitem>
    <listitem>
      <para>Return to the root shell on your first Management Server.</para>
    </listitem>
    <listitem>
      <para>Set up the database. The following command creates the cloud user on the
        database.</para>
      <itemizedlist>
        <listitem>
          <para>In dbpassword, specify the password to be assigned to the cloud user. You can choose
            to provide no password.</para>
        </listitem>
        <listitem>
          <para>In deploy-as, specify the username and password of the user deploying the database.
            In the following command, it is assumed the root user is deploying the database and
            creating the cloud user.</para>
        </listitem>
        <listitem>
          <para>(Optional) For encryption_type, use file or web to indicate the technique used to
            pass in the database encryption password. Default: file. See <xref
              linkend="about-password-encryption"/>.</para>
        </listitem>
        <listitem>
          <para>(Optional) For management_server_key, substitute the default key that is used to
            encrypt confidential parameters in the &PRODUCT; properties file. Default: password. It
            is highly recommended that you replace this with a more secure value. See About Password
            and Key Encryption.</para>
        </listitem>
        <listitem>
          <para>(Optional) For database_key, substitute the default key that is used to encrypt
            confidential parameters in the &PRODUCT; database. Default: password. It is highly
            recommended that you replace this with a more secure value. See <xref
              linkend="about-password-encryption"/>.</para>
        </listitem>
      </itemizedlist>
      <programlisting language="Bash">cloud-setup-databases cloud:&lt;dbpassword&gt;@&lt;ip address mysql server&gt; \
--deploy-as=root:&lt;password&gt; \
-e &lt;encryption_type&gt; \
-m &lt;management_server_key&gt; \
-k &lt;database_key&gt;</programlisting>
      <para>When this script is finished, you should see a message like “Successfully initialized
        the database.”</para>
    </listitem>
  </orderedlist>
</section>