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