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   distributed with this work for additional information#
   regarding copyright ownership.  The ASF licenses this file
   to you under the Apache License, Version 2.0 (the
   "License"); you may not use this file except in compliance
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   Unless required by applicable law or agreed to in writing,
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   "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   KIND, either express or implied.  See the License for the
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Overview
--------

This section describes installing the Management Server. There are two
slightly different installation flows, depending on how many Management
Server nodes will be in your cloud:

-  A single Management Server node, with MySQL on the same node.

-  Multiple Management Server nodes, with MySQL on a node separate from
   the Management Servers.

In either case, each machine must meet the system requirements described
in :ref:`minimum-system-requirements`.

.. warning::
   For the sake of security, be sure the public Internet can not access port
   8096 or port 8250 on the Management Server.

The procedure for installing the Management Server is:

#. Prepare the Operating System

#. (XenServer only) Download and install vhd-util.

#. Install the First Management Server

#. Install and Configure the MySQL database

#. Prepare NFS Shares

#. Prepare and Start Additional Management Servers (optional)

#. Prepare the System VM Template


Prepare the Operating System
----------------------------

The OS must be prepared to host the Management Server using the
following steps. These steps must be performed on each Management Server
node.

#. Log in to your OS as root.

#. Check for a fully qualified hostname.

   .. parsed-literal::

      hostname --fqdn

   This should return a fully qualified hostname such as
   "management1.lab.example.org". If it does not, edit /etc/hosts so
   that it does.

#. Make sure that the machine can reach the Internet.

   .. parsed-literal::

      ping cloudstack.apache.org

#. Turn on NTP for time synchronization.

   .. note::
      An NTP daemon is required to synchronize the clocks of the servers in your cloud.

   Install chrony.

   In RHEL or CentOS:

      .. parsed-literal::

         $ yum install chrony

   In Ubuntu:

      .. parsed-literal::

         $ apt-get install chrony

   In SUSE:

      .. parsed-literal::

         $ zypper install chrony

#. Repeat all of these steps on every host where the Management Server
   will be installed.

.. warning::
   CloudStack |version| requires Java 11 JRE. Installing CloudStack packages will
   automatically install Java 11, but it's good to explicitly confirm that the Java 11
   is the selected/active one (in case you had a previous Java version already installed)
   with ``alternatives --config java`` after CloudStack packages are already installed.