红帽全球峰会3.2. 格式
目前支持 原生、qcow 和 raw 格式。
您可以使用 native 格式在 Red Hat Ceph Storage 集群中描述作为源镜像的原生 RBD 镜像。source-spec JSON 文档以以下方式进行编码：
语法
{
"type": "native",
["cluster_name": "<cluster-name>",] (specify if image in another cluster, requires <cluster-name>.conf file)
["client_name": "<client-name>",] (for connecting to another cluster, default is client.admin)
"pool_name": "POOL_NAME",
["pool_id": "POOL_ID",] (optional, alternative to "POOL_NAME" key)
["pool_namespace": "POOL_NAMESPACE",] (optional)
"image_name": "IMAGE_NAME>",
["image_id": "IMAGE_ID",] (specify if image is in trash)
"snap_name": "SNAP_NAME",
["snap_id": "SNAP_ID",] (optional, alternative to "SNAP_NAME" key)
}
请注意，native 格式不包括 stream 对象，因为它使用了原生 Ceph 操作。例如，若要从镜像 rbd/ns1/image1@snap1 导入，可以使用 source-spec 进行编码：
示例
{
"type": "native",
"pool_name": "rbd",
"pool_namespace": "ns1",
"image_name": "image1",
"snap_name": "snap1"
}
您可以使用 qcow 格式描述 QEMU copy-on-write(QCOW)块设备。目前支持 QCOW v1 和 v2 格式，除了压缩、加密、备份文件和外部数据文件等高级功能外。您可以将 qcow 格式数据链接到任何支持的流源：
示例
{
"type": "qcow",
"stream": {
"type": "file",
"file_path": "/mnt/image.qcow"
}
}
您可以使用 raw 格式来描述 thick-provisioned 原始块设备导出，它是 rbd export –export-format 1 SNAP_SPEC。您可以将 raw 格式数据链接到任何支持的流源：
示例
{
"type": "raw",
"stream": {
"type": "file",
"file_path": "/mnt/image-head.raw"
},
"snapshots": [
{
"type": "raw",
"name": "snap1",
"stream": {
"type": "file",
"file_path": "/mnt/image-snap1.raw"
}
},
] (optional oldest to newest ordering of snapshots)
}
包括 snapshots 数组是可选的，目前只支持 thick-provisioned raw 快照导出。
'%20d='M201.5%20305.5c-13.8%200-24.9-11.1-24.9-24.6%200-13.8%2011.1-24.9%2024.9-24.9%2013.6%200%2024.6%2011.1%2024.6%2024.9%200%2013.6-11.1%2024.6-24.6%2024.6zM504%20256c0%20137-111%20248-248%20248S8%20393%208%20256%20119%208%20256%208s248%20111%20248%20248zm-132.3-41.2c-9.4%200-17.7%203.9-23.8%2010-22.4-15.5-52.6-25.5-86.1-26.6l17.4-78.3%2055.4%2012.5c0%2013.6%2011.1%2024.6%2024.6%2024.6%2013.8%200%2024.9-11.3%2024.9-24.9s-11.1-24.9-24.9-24.9c-9.7%200-18%205.8-22.1%2013.8l-61.2-13.6c-3-.8-6.1%201.4-6.9%204.4l-19.1%2086.4c-33.2%201.4-63.1%2011.3-85.5%2026.8-6.1-6.4-14.7-10.2-24.1-10.2-34.9%200-46.3%2046.9-14.4%2062.8-1.1%205-1.7%2010.2-1.7%2015.5%200%2052.6%2059.2%2095.2%20132%2095.2%2073.1%200%20132.3-42.6%20132.3-95.2%200-5.3-.6-10.8-1.9-15.8%2031.3-16%2019.8-62.5-14.9-62.5zM302.8%20331c-18.2%2018.2-76.1%2017.9-93.6%200-2.2-2.2-6.1-2.2-8.3%200-2.5%202.5-2.5%206.4%200%208.6%2022.8%2022.8%2087.3%2022.8%20110.2%200%202.5-2.2%202.5-6.1%200-8.6-2.2-2.2-6.1-2.2-8.3%200zm7.7-75c-13.6%200-24.6%2011.1-24.6%2024.9%200%2013.6%2011.1%2024.6%2024.6%2024.6%2013.8%200%2024.9-11.1%2024.9-24.6%200-13.8-11-24.9-24.9-24.9z'/%3e%3c/svg%3e){kind=small}