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- virtualization terminology
- pros and cons of virtualization
- various variations of Hypervisors and Virtual Machine Monitors
- major aspects of migrating physical to virtual machines
- major aspects of migrating virtual machines between host systems
- features and implications of virtualization for a virtual machine, such as snapshotting, pausing, cloning and resource limits
- oVirt, Proxmox, systemd-machined and VirtualBox
- Open vSwitch

- Hypervisor
- Hardware Virtual Machine (HVM)
- Paravirtualization (PV)
- Emulation and Simulation
- CPU flags
- /proc/cpuinfo
- Migration (P2V, V2V)


- architecture of Xen, including networking and storage
- Basic configuration of Xen nodes and domains
- Basic management of Xen nodes and domains
- Basic troubleshooting of Xen installations
- XAPI
- XenStore
- Xen Boot Parameters
- xm utility

- Domain0 (Dom0), DomainU (DomU)
- PV-DomU, HVM-DomU
- /etc/xen/
- xl
- xl.cfg
- xl.conf
- xentop

- architecture of QEMU, including KVM, networking and storage
- Start QEMU instances from the command line
- Manage snapshots using the QEMU monitor
- Install the QEMU Guest Agent and VirtIO device drivers
- Troubleshoot QEMU installations, including networking and storage
- important QEMU configuration parameters

- Kernel modules: kvm, kvm-intel and kvm-amd
- /dev/kvm
- QEMU monitor
- qemu
- qemu-system-x86_64
- ip
- brctl
- tunctl


- architecture of libvirt
- Manage libvirt connections and nodes
- Create and manage QEMU and Xen domains, including snapshots
- Manage and analyze resource consumption of domains
- Create and manage storage pools and volumes
- Create and manage virtual networks
- Migrate domains between nodes
- how libvirt interacts with Xen and QEMU
- how libvirt interacts with network services such as dnsmasq and radvd
- libvirt XML configuration files
- virtlogd and virtlockd

- libvirtd
- /etc/libvirt/
- virsh (including relevant subcommands)

- Understand features of various virtual disk image formats, such as raw images, qcow2 and VMDK
- Manage virtual machine disk images using qemu-img
- Mount partitions and access files contained in virtual machine disk images using libguestfish
- Copy physical disk content to a virtual machine disk image
- Migrate disk content between various virtual machine disk image formats
- Awareness of Open Virtualization Format (OVF)

- qemu-img
- guestfish (including relevant subcommands)
- guestmount
- guestumount
- virt-cat
- virt-copy-in
- virt-copy-out
- virt-diff
- virt-inspector
- virt-filesystems
- virt-rescue
- virt-df
- virt-resize
- virt-sparsify
- virt-p2v
- virt-p2v-make-disk
- virt-v2v
- virt-sysprep


- concepts of system and application container
- analyze kernel namespaces
- analyze control groups
- analyze capabilities
- role of seccomp, SELinux and AppArmor for container virtualization
- LXC and Docker leverage namespaces, cgroups, capabilities, seccomp and MAC

- principle of runc
- principle of CRI-O and containerd
- OCI runtime and image specifications
- Kubernetes Container Runtime Interface (CRI)
- podman, buildah and skopeo
- other container virtualization approaches in Linux and other free operating systems, such as rkt, OpenVZ, systemd-nspawn or BSD Jails

- nsenter
- unshare
- ip (including relevant subcommands)
- capsh
- /sys/fs/cgroups
- /proc/[0-9]+/ns
- /proc/[0-9]+/status

- architecture of LXC and LXD
- Manage LXC containers based on existing images using LXD, including networking and storage
- Configure LXC container properties
- Limit LXC container resource usage
- Use LXD profiles
- LXC images
- Awareness of traditional LXC tools
- lxd
- lxc (including relevant subcommands)


- architecture and components of Docker
- Manage Docker containers by using images from a Docker registry
- images and volumes for Docker containers
- logging for Docker containers
- networking for Docker
- Use Dockerfiles to create container images
- Run a Docker registry using the registry Docker image

- dockerd
- /etc/docker/daemon.json
- /var/lib/docker/
- docker
- Dockerfile

- relevance of container orchestration
- key concepts of Docker Compose and Docker Swarm
- key concepts of Kubernetes and Helm
- Awareness of OpenShift, Rancher and Mesosphere DC/OS

- Understand common offerings in public clouds
- Basic feature knowledge of OpenStack
- Basic feature knowledge of Terraform
- Awareness of CloudStack, Eucalyptus and OpenNebula
- IaaS, PaaS, SaaS
- OpenStack
- Terraform

- Understand the functionality and features of Packer
- Create and maintain template files
- Build images from template files using different builders
- packer

- features and concepts of cloud-init, including user-data, initializing and configuring cloud-init
- Use cloud-init to create
- resize and mount file systems
- configure user accounts
- including login credentials such as SSH keys and install software packages from the distributions repository
- Integrate cloud-init into system images
- Use config drive datasource for testing
- cloud-init
- user-data
- /var/lib/cloud/

- Vagrant architecture and concepts, including storage and networking
- Retrieve and use boxes from Atlas
- Create and run Vagrantfiles
- Access Vagrant virtual machines
- Share and synchronize folder between a Vagrant virtual machine and the host system
- Vagrant provisioning, i.e. File and Shell provisioners
- multi-machine setup
- vagrant
- Vagrantfile