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1 - Diskimage-builder

1 - Diskimage-builder

• 1 - Before
• 2 - Disk image builder
• Example
• Support Matrix
• 3 - Details
• Elements
• Block Device Layer
• Block Device Later MBR module
• Tips

1 - Before

Building OS the “trad” way
- Iso (+ kind of automation KS / Preseed)
- OS Treee (DebootStrap)

Issue:
- For each OS, you have a different tool
- Expodential combinaison

Goal:
- 1 to rule them all

2 - Disk image builder

Example

disk-image-builder debian-minimal vm
disk-image-builder fedora-minimal vm
disk-image-builder centos-minimal vm

disk-image-builder -o docker debian-minimal

Support Matrix

Combinaison:
* OS
* Arch
* Env (VMWare, OpenStack, KVM, AWS, DOcker, Bare-metal)

Qemu is used for Arch and Image convertion

3 - Details

Elements

Like puppet-modules, …

An element is:
- Collection of config files
- Collection of dirs
- Collection of scripts

README.rst
element-deps
package-installs.yaml   (By Arch)

environment.d/          (Export ENV variables)

root.d/                 (Scripts)

Block Device Layer

Hierarchie:
0 - Disk space, loop device, …
1 - Partitioning / LVM
2 - FS generation
3 - Mount
4 - FSTab handling

-> Yaml file config with actions for each layer

Block Device Later MBR module

-> OK

Tips

Build lean OS image and pass it to your config Management system