3.2. 创建存储策略

Ceph 对象网关通过标识放置目标并在与放置目标关联的池中存储 bucket 和对象来存储客户端存储桶和对象。如果您不配置放置目标，并将它们映射到实例区域配置中的池，Ceph 对象网关将使用默认目标和池，如 default_placement。

存储策略为 Ceph 对象网关客户端提供了一种访问存储策略的方式，即能够将特定类型的存储作为目标，如 SSD、SAS 驱动器、SATA 驱动器。确保持久性、复制、纠删代码等特殊方法。详情请参阅 Red Hat Ceph Storage 3 的存储策略 指南。

要创建存储策略，请使用以下步骤：

使用所需的存储策略，创建一个新的 pool .rgw.buckets.special。例如，使用纠删代码、特定 CRUSH 规则集、副本数和 a pg_num 和 pgp_num 计数自定义的池。

获取 zone group 配置并将其存储在文件中，如 zonegroup.json ：

语法

radosgw-admin zonegroup --rgw-zonegroup=<zonegroup_name> get > zonegroup.json

[root@master-zone]# radosgw-admin zonegroup --rgw-zonegroup=<zonegroup_name> get > zonegroup.json

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示例

radosgw-admin zonegroup --rgw-zonegroup=default get > zonegroup.json

[root@master-zone]# radosgw-admin zonegroup --rgw-zonegroup=default get > zonegroup.json

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在 zonegroup.json 文件中，在 placement_target 下添加一个 特殊placement 条目。

{
	"name": "default",
	"api_name": "",
	"is_master": "true",
	"endpoints": [],
	"hostnames": [],
	"master_zone": "",
	"zones": [{
		"name": "default",
		"endpoints": [],
		"log_meta": "false",
		"log_data": "false",
		"bucket_index_max_shards": 5
	}],
	"placement_targets": [{
		"name": "default-placement",
		"tags": []
	}, {
		"name": "special-placement",
		"tags": []
	}],
	"default_placement": "default-placement"
}

{
	"name": "default",
	"api_name": "",
	"is_master": "true",
	"endpoints": [],
	"hostnames": [],
	"master_zone": "",
	"zones": [{
		"name": "default",
		"endpoints": [],
		"log_meta": "false",
		"log_data": "false",
		"bucket_index_max_shards": 5
	}],
	"placement_targets": [{
		"name": "default-placement",
		"tags": []
	}, {
		"name": "special-placement",
		"tags": []
	}],
	"default_placement": "default-placement"
}

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使用修改的 zone group.json 文件设置 zone group ：
```
radosgw-admin zonegroup set < zonegroup.json
```
```
[root@master-zone]# radosgw-admin zonegroup set < zonegroup.json
```
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获取区配置并将其存储在文件中，如 zone.json ：
```
radosgw-admin zone get > zone.json
```
```
[root@master-zone]# radosgw-admin zone get > zone.json
```
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编辑区文件并在 placement_pool 下添加新放置策略键：

{
	"domain_root": ".rgw",
	"control_pool": ".rgw.control",
	"gc_pool": ".rgw.gc",
	"log_pool": ".log",
	"intent_log_pool": ".intent-log",
	"usage_log_pool": ".usage",
	"user_keys_pool": ".users",
	"user_email_pool": ".users.email",
	"user_swift_pool": ".users.swift",
	"user_uid_pool": ".users.uid",
	"system_key": {
		"access_key": "",
		"secret_key": ""
	},
	"placement_pools": [{
		"key": "default-placement",
		"val": {
			"index_pool": ".rgw.buckets.index",
			"data_pool": ".rgw.buckets",
			"data_extra_pool": ".rgw.buckets.extra"
		}
	}, {
		"key": "special-placement",
		"val": {
			"index_pool": ".rgw.buckets.index",
			"data_pool": ".rgw.buckets.special",
			"data_extra_pool": ".rgw.buckets.extra"
		}
	}]
}

{
	"domain_root": ".rgw",
	"control_pool": ".rgw.control",
	"gc_pool": ".rgw.gc",
	"log_pool": ".log",
	"intent_log_pool": ".intent-log",
	"usage_log_pool": ".usage",
	"user_keys_pool": ".users",
	"user_email_pool": ".users.email",
	"user_swift_pool": ".users.swift",
	"user_uid_pool": ".users.uid",
	"system_key": {
		"access_key": "",
		"secret_key": ""
	},
	"placement_pools": [{
		"key": "default-placement",
		"val": {
			"index_pool": ".rgw.buckets.index",
			"data_pool": ".rgw.buckets",
			"data_extra_pool": ".rgw.buckets.extra"
		}
	}, {
		"key": "special-placement",
		"val": {
			"index_pool": ".rgw.buckets.index",
			"data_pool": ".rgw.buckets.special",
			"data_extra_pool": ".rgw.buckets.extra"
		}
	}]
}

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设置新区域配置。

radosgw-admin zone set < zone.json

[root@master-zone]# radosgw-admin zone set < zone.json

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更新 zone group map。
```
radosgw-admin period update --commit
```
```
[root@master-zone]# radosgw-admin period update --commit
```
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special-placement 条目列为 placement_target。

在发出请求时指定存储策略：

例如：

curl -i http://10.0.0.1/swift/v1/TestContainer/file.txt -X PUT -H "X-Storage-Policy: special-placement" -H "X-Auth-Token: AUTH_rgwtxxxxxx"

$ curl -i http://10.0.0.1/swift/v1/TestContainer/file.txt -X PUT -H "X-Storage-Policy: special-placement" -H "X-Auth-Token: AUTH_rgwtxxxxxx"

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3.2. 创建存储策略

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