Installing Virtualisation Software and Virtual Servers.

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ICANWK525B Configure an Enterprise Virtual Computing Environment ICTSUS5187A Implement Server Virtualisation for a Sustainable ICT system Installing Virtualisation Software and Virtual Servers
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Transcript of Installing Virtualisation Software and Virtual Servers.

  • Slide 1
  • Installing Virtualisation Software and Virtual Servers
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  • We have already seen OHS issues in terms of router installation. The same issues arise with installing physical servers: Electrical safety: wires, cabling, connectors Server weight: lift correctly, get two people to lift if the server is very heavy Ensure that servers are mounted correctly in racks Potential for fire: maintain servers, especially the fans that collect dust
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  • Good communication with the client is very important Know who is the correct person to liaise with Small businesses: typically the owner Mid-sized businesses: manager, IT person Large-sized: most likely the head of IT, the CTO, other stakeholders in the organisation If you are a consultant, ensure you have access to the site as required Remember: avoid disruptions to the client
  • Slide 6
  • How much space in square metres is needed? How much power in watts or kilowatts will the complete solution require? Each server The SAN device and the disk drives The switches in the server room The air conditioning What type of air conditioning? Is all of this an improvement over the old solution?
  • Slide 7
  • Installing a server, like a router, is a complex operation You need a list (in sequence) of the steps to take, so that you dont forget to do something Includes components, tools, consumables, locations, people, actions Also includes contingency plans: What to do when something goes wrong
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  • Many issues to consider: Hardware, software, configuration, physical handling, power and data cabling Liaising with the customer OHS, legal, contractual aspects Business requirements Technical documentation Risks and how to avoid them Producing new documentation of the final server configuration Needs to be extremely detailed
  • Slide 9
  • Purchase server from vendor Take delivery of server from vendor Unpack server, check for damage Read installation documentation Install internal components (RAM, NICs) If possible, install software and test it Collect equipment & consumables required to perform the installation Obtain site access
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  • Take server, tools, consumables to site Locate server room Physically move server to server room Fit rack-mount slide rails to server and to rack Lift server (with help) and mount in the rack according to OHS requirements Connect power according to OHS & building requirements Connect data and peripheral cabling to server
  • Slide 11
  • Power up server, test basic operation If necessary, install software: Base OS Virtualisation software Management software Configure networking on the server Migrate existing physical servers to VMs on the new server Keep existing servers running Plan for a cutover time to switch to VMs without losing data from existing servers
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  • Test that VMs created work Test networking, SAN, other components Cutover to the VMs, disabling access to the old physical servers Do not lose the old servers: rollback plan! Test the VMs work in production environment Tidy up the installation: packaging, tools, consumables Document the changed system Report back to the customer with the documents
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  • We saw the two main server virtualisation products: vSphere and Hyper-V You must determine if the hardware you purchase can run the virtualisation product you choose Ditto: can it virtualise the existing OS and applications running on the old physical servers? Only solution: read the documentation for the virtualisation product vSphere has minimum hardware requirementshardware requirements
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  • This depends on which one you choose Hyper-V requires Windows Server 2012 to be installed first vSphere comes with its own kernel, so it doesnt need an OS like Windows Server Documentation: vSphere 5.0 Installation and Setup vSphere 5.0 Installation and Setup Hyper-V Getting Started Guide Hyper-V Getting Started Guide
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  • Servers are typically locked away in a server room Often run in headless mode: no screen, keyboard or mouse connected You need the ability to manage the virtualisation server and the VMs running on it You need to be able to do this remotely
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  • There is usually a client application to access and manage the virtualisation software remotely: web interface, or local application
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  • Server OS are designed to be managed remotely: both physical and VMs Typically a client on the admins desktop which gives an interface on the server Remote GUI tools: RDP (remote desktop), VNC, web-based remote desktop tools
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  • System security is as important on virtual machines as it is on physical machines Viruses dont care if they are runnin on a virtual machine or on a physical machine You need to turn on automatic updates on all your virtual machines so that they stay patched and thus protected against malware
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