How to build customized CoreOS to create images for NIFTY Cloud. https://www.docswell.com/s/higebu/57VDDV-building-and-customizing-coreos

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Building and Customizing CoreOS
Yuya Kusakabe-@higebu
NIFTY Corp.
Nov. 13, 2014
-Creating images for NIFTY Cloud -

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About me
Twitter / GitHub: @higebu
Engineer at Nifty Corp.
DesiningNIFTY Cloud virtual network services
Hacking VyOS, Packer, Zabbix
and CoreOS<-New!

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About NIFTY Cloud
Launched in 2010.
IaaS, PaaSand SaaS.
Based on VMware.
Original cloud controller like OpenStack.

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Why customize CoreOS?
To provide CoreOSimages on NIFTY Cloud.
We need to handle end-user cloud-configfiles.

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Why build CoreOS?
Because we can not install packages on CoreOSwithout building.
Read-only rootfs
No classic package manager

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Building CoreOS( not customized )
For more detail:
https://coreos.com/docs/sdk-distributors/sdk/modifying-coreos/

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Install depot_tools
%gitclone https://chromium.googlesource.com/chromium/tools/depot_tools.git
%export PATH="$PATH":`pwd`/depot_tools
For more details about depot_tools:
http://www.chromium.org/developers/how-tos/depottools

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Bootstrap the SDK chroot
%mkdircoreos; cd coreos
%gitconfig--global color.uifalse # avoid interactive question
%repo init-u https://github.com/coreos/manifest.git -g minilayout-- repo-urlhttps://chromium.googlesource.com/external/repo.git
%repo sync

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Building an image
%cros_sdk
%cros_sdk--enter
%./set_shared_user_password.sh
%echo amd64-usr > .default_board
%./setup_board
%./build_packages
%./build_imageprod --group alpha # production and alpha channel
%./image_to_vm.sh --from=../build/images/amd64-usr/latest -- board=amd64-usr --prod_image--format vmware# convert to VMware VMX and VMDK
%exit
Your image is in the following directory.
“src/build/images/amd64-usr/latest/”

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Customizing CoreOS

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Add support for NIFTY Cloud
Add oem-niftycloudto coreos-overlay
https://github.com/higebu/coreos- overlay/tree/niftycloud-494
Add niftycloudformat to scripts/build_library/vm_image_util.sh
https://github.com/higebu/scripts/tree/niftycloud-494
VMware Tools
Experimental support for open-vm-toolsat 471.1.0

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oem-niftycloud
https://github.com/higebu/coreos- overlay/tree/niftycloud-494/coreos-base/oem-niftycloud
% tree coreos-base/oem-niftycloud/
coreos-base/oem-niftycloud/
├──files
│├──cloud-config.yml# cloud-configfor NIFTY Cloud
│├──coreos-setup-environment # set environment variables
│├──niftycloud-coreos-cloudinit# run coreos-cloudinitwith user-data
│├──niftycloud-run-startup-scripts # run user scripts
│└──niftycloud-ssh-key # set sshkey
└──oem-niftycloud-0.0.1.ebuild
1 directory, 6 files

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niftycloudformat
https://github.com/higebu/scripts/blob/niftycloud- 494/build_library/vm_image_util.sh
## niftycloud
IMG_niftycloud_DISK_FORMAT=vmdk_scsi
IMG_niftycloud_DISK_LAYOUT=vm
IMG_niftycloud_CONF_FORMAT=vmx
IMG_niftycloud_OEM_PACKAGE=oem-niftycloud

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open-vm-tools
It’s me!

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Building CoreOS( Customized )
For more detail:
https://coreos.com/docs/sdk-distributors/sdk/modifying-coreos/

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Modify manifests/release.xml
<project groups="minilayout" name="higebu/coreos-overlay" path="src/third_party/coreos-overlay" remote="private" revision="niftycloud- 494"upstream="refs/heads/master"/>
<project groups="minilayout" name="higebu/scripts" path="src/scripts" remote="private" revision="niftycloud-494" upstream="refs/heads/master"/>
•Change repository names and revisions

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Install depot_tools
%gitclone https://chromium.googlesource.com/chromium/tools/depot_tools.git
%export PATH="$PATH":`pwd`/depot_tools
For more details about depot_tools:
http://www.chromium.org/developers/how-tos/depottools

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Bootstrap the SDK chroot
% mkdircoreos; cd coreos
%gitconfig--global color.uifalse # avoid interactive question
%repo init-u ssh://git@github.com/higebu/manifest.git -b niftycloud- 494 -g minilayout--repo-urlhttps://chromium.googlesource.com/external/repo.git
%repo init–m release.xml
%repo sync

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Building an image
%cros_sdk--download
%cros_sdk--"./set_shared_user_password.sh" "core"
%echo "amd64-usr" > src/scripts/.default_board
%cros_sdk--"./setup_board"
%cros_sdk--"./build_packages"
%cros_sdk--"./build_image" "prod" "--group" "alpha"
%cros_sdk--"./image_to_vm.sh" "--from=../build/images/amd64- usr/latest" "--board=amd64-usr" "--prod_image" "--format" "niftycloud"
Your image is in the following directory.
“src/build/images/amd64-usr/latest/”
•Use niftycloudformat
•Use “cros_sdk--” for automation

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NIFTY Cloud CoreOSimages!

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Thank you for listening!
We are hiring!
http://www.nifty.co.jp/recruit/

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