Files
d3775d77217e3b7768421a255f8441e54018a6a1
training-guides /lab000-important-terms.xml

62 lines
2.6 KiB
XML
Raw Normal View History

<?xml version="1.0" encoding="utf-8"?>
<chapter xmlns="http://docbook.org/ns/docbook"
xmlns:xi="http://www.w3.org/2001/XInclude"
xmlns:xlink="http://www.w3.org/1999/xlink" version="5.0"
xml:id="lab000-important-terms">
<title>Important terms</title>
<formalpara>
<title>Host Operating System (Host)</title>
<para>The operating system that is installed on your laptop or
desktop that hosts virtual machines. Commonly referred to as
<firstterm>host OS</firstterm> or <firstterm>host</firstterm>.
In short, the machine where your Virtual Box is
installed.</para>
</formalpara>
<formalpara>
<title>Guest Operating System (Guest)</title>
<para>The operating system that is installed on your Virtual Box
Virtual Machine. This virtual instance is independent of the
host OS. Commonly referred to as <firstterm>guest OS</firstterm>
or <firstterm>guest</firstterm>.</para>
</formalpara>
<formalpara>
<title>Node</title>
<para>In this context, refers specifically to servers. Each
OpenStack server is a node.</para>
</formalpara>
<formalpara>
<title>Control Node</title>
<para>Hosts the database, Keystone (Middleware), and the servers
for the scope of the current OpenStack deployment. Acts as the
brains behind OpenStack and drives services such as
authentication, database, and so on.</para>
</formalpara>
<formalpara>
<title>Compute Node</title>
<para>Has the required Hypervisor (Qemu/KVM) and is your Virtual
Machine host.</para>
</formalpara>
<formalpara>
<title>Network Node</title>
<para>Provides Network-as-a-Service and virtual networks for
OpenStack.</para>
</formalpara>
<formalpara>
<title>Using OpenSSH</title>
<para>After you set up the network interfaces file, you can switch
to an SSH session by using an OpenSSH client to log in remotely
to the required server node (Control, Network, Compute). Open a
terminal on your host machine. Run the following command:
<screen><prompt>$</prompt> <userinput>ssh-keygen -t rsa</userinput>
<computeroutput>Generating public/private rsa key pair.
Enter file in which to save the key (/u/kim/.ssh/id_rsa): [RETURN]
Enter passphrase (empty for no passphrase): &lt;can be left empty>
Enter same passphrase again: &lt;can be left empty>
Your identification has been saved in /home/user/.ssh/id_rsa.
Your public key has been saved in /home/user/.ssh/id_rsa.pub.
The key fingerprint is:
b7:18:ad:3b:0b:50:5c:e1:da:2d:6f:5b:65:82:94:c5 xyz@example</computeroutput></screen>
</para>
</formalpara>
</chapter>