KVM - Linux kernel virtualization manager

Links: docker containers
Similar in function to VMware, it uses linux as a hypervisor for guest virtual machines.
Makes use of hardware virtualization built into most CPU's.
Gui - Virtual Machine Manager

Memory dedup with KSM

Monitor ksm with

     watch -d "tail  /sys/kernel/mm/ksm/* | sed -e :a -e 's/\(.*[0-9]\)\([0-9]\{3\}\)/\1,\2/;ta'"

Storage virsh/kvm

Disk storage is a pool, volumes is created from the pool and assigned to individual VM's.
- virsh vol-list default

Ubuntu cloud images on KVM

Need a config iso to configure user and ssh keys on boot

sudo apt install cloud-image-utils

Setup config file

# Add groups to the system
# The following example adds the ubuntu group with members 'root' and 'sys'
# and the empty group cloud-users.
groups:
  - ubuntu: [root,sys]
  - cloud-users

# Add users to the system. Users are added after groups are added.
users:
  - default
  - name: vagrant
    password: vagrant   
    chpasswd: { expire: False }
    gecos: Default dev username vagrant
    primary-group: vagrant
    groups: users, sudo
    #selinux-user: staff_u
    #expiredate: 2012-09-01
    ssh-import-id: vagrant
    ssh_pwauth: True
    lock_passwd: false
    passwd: vagrant

VBox - Oracle virtual box

Create physical disk drive
- \Program Files\Oracle\VirtualBox\VBoxManage.exe" internalcommands createrawvmdk -filename "C:\Users\<user_name>\VirtualBox VMs\<VM_folder_name>\<file_name>.vmdk" -rawdisk \\.\PhysicalDrive#

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