如何备份和恢复(修改)bucket元数据信息

查看bucket下面的元数据列表

在ceph 10.2.9 下面操作，以修改Object名称为host的content_type属性为例，所有数据操作都有风险，请谨慎操作。

root@demohost:/home/demouser# radosgw-admin bi list --bucket=test
[
    {
        "type": "plain",
        "idx": "host",
        "entry": {
            "name": "host", #object名称
            "instance": "",
            "ver": {
                "pool": 60,
                "epoch": 1
            },
            "locator": "",
            "exists": "true",
            "meta": {
                "category": 1,
                "size": 254,
                "mtime": "2017-08-30 07:46:16.956870Z",
                "etag": "99a8629776211452eb4b9c3e6333a426",
                "owner": "s3user",
                "owner_display_name": "s3user",
                "content_type": "text\/plain", #Object对应的content_type属性
                "accounted_size": 254
            },
            "tag": "0a6967a5-2c76-427a-99c6-8a788ca25034.54133.2084",
            "flags": 0,
            "pending_map": [],
            "versioned_epoch": 0
        }
    }
]
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查看对应Object的bucket元数据信息

root@demohost:/home/demouser# radosgw-admin bi get --bucket=test --object=host

{
    "type": "plain",
    "idx": "host",
    "entry": {
        "name": "host",
        "instance": "",
        "ver": {
            "pool": 60,
            "epoch": 1
        },
        "locator": "",
        "exists": "true",
        "meta": {
            "category": 1,
            "size": 254,
            "mtime": "2017-08-30 07:46:16.956870Z",
            "etag": "99a8629776211452eb4b9c3e6333a426",
            "owner": "s3user",
            "owner_display_name": "s3user",
            "content_type": "text\/plain",
            "accounted_size": 254
        },
        "tag": "0a6967a5-2c76-427a-99c6-8a788ca25034.54133.2084",
        "flags": 0,
        "pending_map": [],
        "versioned_epoch": 0
    }
}
root@demohost:/home/demouser# radosgw-admin bi get --bucket=test --object=host > host.bi #导出(备份)到本地
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修改对应Object的元数据

root@demohost:/home/demouser# cat host.bi
{
    "type": "plain",
    "idx": "host",
    "entry": {
        "name": "host",
        "instance": "",
        "ver": {
            "pool": 60,
            "epoch": 1
        },
        "locator": "",
        "exists": "true",
        "meta": {
            "category": 1,
            "size": 254,
            "mtime": "2017-08-30 07:46:16.956870Z",
            "etag": "99a8629776211452eb4b9c3e6333a426",
            "owner": "s3user",
            "owner_display_name": "s3user",
            "content_type": "jpg\/plain", #随便改了个jpg
            "accounted_size": 254
        },
        "tag": "0a6967a5-2c76-427a-99c6-8a788ca25034.54133.2084",
        "flags": 0,
        "pending_map": [],
        "versioned_epoch": 0
    }
}

root@demohost:/home/demouser# radosgw-admin bi put --bucket=test --object=host < host.bi #导入修改后的内容(恢复)
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查看修改结果

root@demohost:/home/demouser# radosgw-admin bi get --bucket=test --object=host
{
    "type": "plain",
    "idx": "host",
    "entry": {
        "name": "host",
        "instance": "",
        "ver": {
            "pool": 60,
            "epoch": 1
        },
        "locator": "",
        "exists": "true",
        "meta": {
            "category": 1,
            "size": 254,
            "mtime": "0.000000",
            "etag": "99a8629776211452eb4b9c3e6333a426",
            "owner": "s3user",
            "owner_display_name": "s3user",
            "content_type": "jpg\/plain", #修改完成
            "accounted_size": 254
        },
        "tag": "0a6967a5-2c76-427a-99c6-8a788ca25034.54133.2084",
        "flags": 0,
        "pending_map": [],
        "versioned_epoch": 0
    }
}


root@demohost:/home/demouser# radosgw-admin bi list --bucket=test

[
    {
        "type": "plain",
        "idx": "host",
        "entry": {
            "name": "host",
            "instance": "",
            "ver": {
                "pool": 60,
                "epoch": 1
            },
            "locator": "",
            "exists": "true",
            "meta": {
                "category": 1,
                "size": 254,
                "mtime": "0.000000",
                "etag": "99a8629776211452eb4b9c3e6333a426",
                "owner": "s3user",
                "owner_display_name": "u-n4999",
                "content_type": "jpg\/plain",  #修改完成
                "accounted_size": 254
            },
            "tag": "0a6967a5-2c76-427a-99c6-8a788ca25034.54133.2084",
            "flags": 0,
            "pending_map": [],
            "versioned_epoch": 0
        }
    }
]
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