오픈 스택의 Glance(https://docs.openstack.org/glance/latest/contributor/architecture.html)를 사용하면 운영체제 템플릿 이미지를 등록할 수 있다. 이미지 등록, 삭제, 변경등을 api를 통해 진행할 수 있다. 




Glance API 서버를 통해 controller를 지나 Registry Layer에서 Glance DB를 사용하는 구조이다. 



출처 : https://docs.openstack.org/glance/latest/contributor/architecture.html




이미지 포맷은 https://docs.openstack.org/image-guide/image-formats.html에서 볼 수 있듯이 다양하다.


많은 이미지와 컨테이너 타입을 지원하고 있다. 표로 설명하는 문서(https://platform9.com/support/supported-image-types-and-file-formats/)는 다음과 같다.


Format TypeDescriptionSupported By Platform9? Our Comments
raw/imgAn unstructured disk image format; if you have a file without an extension it is possibly a raw format.Yes (given .raw, .img, .dat, .bin extensions)Common extensions .raw, .img, .dat, .bin
qcow2Supported by the QEMU emulator that can expand dynamically and supports Copy-on-WriteYesMost common file format used with Linux/KVM
vmdkCommon disk format supported by many common virtual machine monitorsYes (for VMware vSphere hypervisor)VMDK format is commonly associated with VMware
vdiSupported by VirtualBox virtual machine monitor and the QEMU emulatorNot recommended(Will be recognized, but may or may not work depending on driver availability)VirtualBox image files in practice may or may not work with Linux/KVM hypervisor. You might run into compatibility issues due to missing required virtualization drivers)
isoAn archive format for the data contents of an optical disc, such as CD-ROMYes
akiAn Amazon kernel imageNoAmazon image types are not popularly used with Linux/KVM
ariAn Amazon ramdisk imageNoAmazon image types are not popularly used with Linux/KVM
amiAn Amazon machine imageNoAmazon image types are not popularly used with Linux/KVM
vhdThe VHD disk format, a common disk format used by virtual machine monitors from VMware, Xen, Microsoft, VirtualBox, and others
No
 Not a popular image format




우분투 OS이미지를 생성하는 방법(아마도 구 버전이겠지만.) 대충 이렇다.

(출처 : http://lollyrock.com/articles/glance-image-create/)


glance image-create --name 'Ubuntu 14.04 LTS' \ --container-format bare \ --disk-format qcow2 \ --is-public true \ --copy-from http://uec-images.ubuntu.com/releases/14.04/release/ubuntu-14.04-server-cloudimg-amd64-disk1.img +------------------+--------------------------------------+ | Property | Value | +------------------+--------------------------------------+ | checksum | None | | container_format | bare | | created_at | 2014-04-02T13:16:20 | | deleted | False | | deleted_at | None | | disk_format | qcow2 | | id | aa5ab6de-e461-4330-136e-fb149802bdc0 | | is_public | True | | min_disk | 0 | | min_ram | 0 | | name | Ubuntu 14.04 LTS Beta 1 | | owner | 9ab2f1a7ca521eee9c8de5a14567d377 | | protected | False | | size | 261095936 | | status | queued | | updated_at | 2014-04-02T13:16:20 | +------------------+--------------------------------------+



glance 슬라이드 자료.


OpenStack Glance from Deepti Ramakrishna


Posted by 김용환 '김용환'

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