cloudstack/docs/tmp/en-US/xml/prepare_os.xml

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<section id="prepare_os" lang="en-US">
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 --> <title>Prepare the Operating System</title>
	 <para>
		The OS must be prepared to host the Management Server using the following steps. These steps must be performed on each Management Server node.
	</para>
	 <orderedlist>
		<listitem>
			<para>
				Log in to your OS as root.
			</para>
		</listitem>
		 <listitem>
			<para>
				Check for a fully qualified hostname.
			</para>
			 
<programlisting># hostname --fqdn</programlisting>
			 <para>
				This should return a fully qualified hostname such as "kvm1.lab.example.org". If it does not, edit /etc/hosts so that it does.
			</para>

		</listitem>
		 <listitem>
			<para>
				Set SELinux to be permissive by default.
			</para>
			 <orderedlist numeration="loweralpha">
				<listitem>
					<para>
						Check to see whether SELinux is installed on your machine. If not, you can skip to step 4.
					</para>
					 <para>
						In RHEL or CentOS, SELinux are installed and enabled by default. You can verify this with:
					</para>
					 
<programlisting># rpm -qa | grep selinux</programlisting>
					 <para>
						In Ubuntu, SELinux is not installed by default. You can verify this with:
					</para>
					 
<programlisting># dpkg --list 'selinux'</programlisting>

				</listitem>
				 <listitem>
					<para>
						Set the SELINUX variable in /etc/selinux/config to “permissive”. This ensures that the permissive setting will be maintained after a system reboot.
					</para>
					 <para>
						In RHEL or CentOS:
					</para>
					 
<programlisting># vi /etc/selinux/config</programlisting>
					 <para>
						In Ubuntu (do this step only if SELinux was found on the machine in the previous step):
					</para>
					 
<programlisting># selinux-config-enforcing permissive</programlisting>

				</listitem>
				 <listitem>
					<para>
						Then set SELinux to permissive starting immediately, without requiring a system reboot.
					</para>
					 <para>
						In CentOS:
					</para>
					 
<programlisting># setenforce permissive</programlisting>
					 <para>
						In RHEL:
					</para>
					 
<programlisting># setenforce 0</programlisting>
					 <para>
						In Ubuntu (do this step only if SELinux was found on the machine):
					</para>
					 
<programlisting># setenforce permissive</programlisting>

				</listitem>

			</orderedlist>

		</listitem>
		 <listitem>
			<para>
				Make sure that the Management Server can reach the Internet.
			</para>
			 
<programlisting># ping www.google.com</programlisting>

		</listitem>
		 <listitem>
			<para>
				(RHEL 6.2) If you do not have a Red Hat Network account, you need to prepare a local Yum repository.
			</para>
			 <orderedlist numeration="loweralpha">
				<listitem>
					<para>
						If you are working with a physical host, insert the RHEL 6.2 installation CD. If you are using a VM, attach the RHEL6 ISO.
					</para>
				</listitem>
				 <listitem>
					<para>
						Mount the CDROM to /media.
					</para>
				</listitem>
				 <listitem>
					<para>
						Create a repo file at /etc/yum.repos.d/rhel6.repo. In the file, insert the following lines:
					</para>
					 
<programlisting>
[rhel]
name=rhel6
baseurl=file:///media
enabled=1
gpgcheck=0    
</programlisting>

				</listitem>

			</orderedlist>

		</listitem>
		 <listitem>
			<para>
				Turn on NTP for time synchronization.
			</para>
			 <note>
				<para>
					NTP is required to synchronize the clocks of the servers in your cloud.
				</para>
			</note>
			 <orderedlist numeration="loweralpha">
				<listitem>
					<para>
						Install NTP.
					</para>
					 <para>
						On RHEL or CentOS:
					</para>
					 
<programlisting># yum install ntp</programlisting>
					 <para>
						On Ubuntu:
					</para>
					 
<programlisting># apt-get install ntp</programlisting>

				</listitem>
				 <listitem>
					<para>
						Edit the NTP configuration file to point to your NTP server.
					</para>
					 
<programlisting># vi /etc/ntp.conf</programlisting>
					 <para>
						For example, you can use one of the following:
					</para>
					 
<programlisting>0.xenserver.pool.ntp.org
1.xenserver.pool.ntp.org
2.xenserver.pool.ntp.org
3.xenserver.pool.ntp.org
</programlisting>

				</listitem>
				 <listitem>
					<para>
						Restart the NTP client.
					</para>
					 
<programlisting># service ntpd restart</programlisting>

				</listitem>
				 <listitem>
					<para>
						Make sure NTP will start again upon reboot.
					</para>
					 <para>
						On RHEL or CentOS:
					</para>
					 
<programlisting># chkconfig ntpd on</programlisting>
					 <para>
						On Ubuntu:
					</para>
					 
<programlisting># chkconfig ntp on</programlisting>

				</listitem>

			</orderedlist>

		</listitem>

	</orderedlist>

</section>