mirror of https://github.com/apache/cloudstack.git
32 lines
4.1 KiB
HTML
32 lines
4.1 KiB
HTML
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<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>2.4. About Hosts</title><link rel="stylesheet" type="text/css" href="Common_Content/css/default.css" /><link rel="stylesheet" media="print" href="Common_Content/css/print.css" type="text/css" /><meta name="generator" content="publican 2.8" /><meta name="package" content="Apache_CloudStack-Admin_Guide-4.0.0-incubating-en-US-1-" /><link rel="home" href="index.html" title="CloudStack Administrator's Guide" /><link rel="up" href="cloud-infrastructure-concepts.html" title="Chapter 2. Cloud Infrastructure Concepts" /><link rel="prev" href="about-clusters.html" title="2.3. About Clusters" /><link rel="next" href="about-primary-storage.html" title="2.5. About Primary Storage" /></head><body><p id="title"><a class="left" href="http://cloudstack.org"><img src="Common_Content/images/image_left.png" alt="Product Site" /></a><a class="right" href="http://docs.cloudstack.org"><img src="Common_Content/images/image_right.png" alt="Documentation Site" /></a></p><ul class="docnav"><li class="previous"><a accesskey="p" href="about-clusters.html"><strong>Prev</strong></a></li><li class="next"><a accesskey="n" href="about-primary-storage.html"><strong>Next</strong></a></li></ul><div xml:lang="en-US" class="section" id="about-hosts" lang="en-US"><div class="titlepage"><div><div><h2 class="title" id="about-hosts">2.4. About Hosts</h2></div></div></div><div class="para">
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A host is a single computer. Hosts provide the computing resources that run the guest virtual machines. Each host has hypervisor software installed on it to manage the guest VMs. For example, a Linux KVM-enabled server, a Citrix XenServer server, and an ESXi server are hosts.
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The host is the smallest organizational unit within a CloudStack deployment. Hosts are contained within clusters, clusters are contained within pods, and pods are contained within zones.
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Hosts in a CloudStack deployment:
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Provide the CPU, memory, storage, and networking resources needed to host the virtual machines
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Interconnect using a high bandwidth TCP/IP network and connect to the Internet
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May reside in multiple data centers across different geographic locations
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May have different capacities (different CPU speeds, different amounts of RAM, etc.), although the hosts within a cluster must all be homogeneous
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Additional hosts can be added at any time to provide more capacity for guest VMs.
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CloudStack automatically detects the amount of CPU and memory resources provided by the Hosts.
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Hosts are not visible to the end user. An end user cannot determine which host their guest has been assigned to.
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For a host to function in CloudStack, you must do the following:
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Install hypervisor software on the host
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Assign an IP address to the host
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Ensure the host is connected to the CloudStack Management Server
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</div></li></ul></div></div><ul class="docnav"><li class="previous"><a accesskey="p" href="about-clusters.html"><strong>Prev</strong>2.3. About Clusters</a></li><li class="up"><a accesskey="u" href="#"><strong>Up</strong></a></li><li class="home"><a accesskey="h" href="index.html"><strong>Home</strong></a></li><li class="next"><a accesskey="n" href="about-primary-storage.html"><strong>Next</strong>2.5. About Primary Storage</a></li></ul></body></html>
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