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--- cloud:courses:intro [2017/11/10 12:00] – blinke
+++ cloud:courses:intro [2017/11/15 12:58] (current) – blinke
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+~~REVEAL~~
+<wrap footer> de.NBI Cloud course </wrap>
+{{no-footer}}
+===== Cloud Intro =====
+Introduction to //cloud//, OpenStack and technology terms
+===== Term: virtualization =====
+  * providing a system and its environment
+  * often the same or similar architecture as underlying //bare metal// system
+  * emulation of foreign architectures possible
+  * usually more than just a virtual system
+    * network
+    * storage
+  * full virtualization vs. para virtualization
+<notes>
+  - explain virtualization vs. emulation
+  - explain difference full virtualization (simulation of hardware) and para virtualization (special devices, faster)
+</notes>
+===== Term: hypervisor =====
+  * a software for providing virtualization
+    * qemu/kvm, Xen, vmWare, HyperV, ...
+    * provides a virtual environment
+  * also: a (bare metal) host for running hypervisor software
+===== Term: virtual machine =====
+  * a virtual computer
+  * virtual resources (CPU, RAM, disk, ...)  provides by hypervisor / virtual environment
+  * often using predefined storage (//image//)
+  * referred to as //instance// in cloud environment
+===== Term: cloud =====
+  * ambiguous, overloaded marketing term
+  * //IaaS//: infrastructure as a service
+    * provides an environment for virtual machines
+    * including network, storage, ...
+  * also PaaS, SaaS, DaaS, FaaS, LBaaS, ...
+===== Cloud vs. Virtualization =====
+  * virtualization is base for cloud
+  * pets vs. cattle
+  * specialized virtualization management software for pets (e.g. vmWare)
+  * //cloud// management software for cattle (Amazon EC2, Microsoft Azure, Openstack, ...)
+===== OpenStack =====
+{{https://www.openstack.org/assets/openstack-logo/2016R/OpenStack-Logo-Horizontal.png}}