为了完成NAS文件系统的某个功能，NAS将自动创建NAS服务关联角色获取访问云服务器ECS、专有网络VPC等云服务的权限。
应用场景
- AliyunServiceRoleForNasStandard
创建通用型NAS文件系统的经典网络类型挂载点时，需要通过AliyunServiceRoleForNasStandard角色访问您的云服务器ECS服务，获取资源列表实现鉴权逻辑。
- AliyunServiceRoleForNasExtreme
极速型NAS文件系统创建挂载点时，需要通过AliyunServiceRoleForNasExtreme角色访问您的专有网络VPC服务与云服务器ECS服务。
- AliyunServiceRoleForNasEncryption
创建用户管理密钥（KMS）加密的文件系统时，需要通过AliyunServiceRoleForNasEncryption角色访问密钥管理服务KMS，获取您托管给密钥管理服务KMS的密钥信息，并为您选择的密钥添加标签，防止您误删除密钥导致文件系统不可用。
- AliyunServiceRoleForNasLogDelivery
使用NAS日志分析功能时，需要通过AliyunServiceRoleForNasLogDelivery角色访问日志服务SLS，并在您的日志服务中创建Project和Logstore，将NAS中存储的日志数据转储至Logstore中。
- AliyunServiceRoleForNasBackup
在创建通用型文件系统时，若要使用文件备份功能，需要通过AliyunServiceRoleForNasBackup角色开通混合云备份服务并创建备份计划。
- AliyunServiceRoleForNasEcsHandler
当您在NAS控制台使用一键挂载功能挂载文件系统时，需要通过AliyunServiceRoleForNasEcsHandler角色访问ECS云助手，并使用ECS云助手为一台或多台ECS实例触发一条云助手命令，实现挂载、卸载文件系统及查询ECS挂载状态。
权限说明
NAS服务关联角色的权限内容如下：
{
"Version": "1",
"Statement": [
{
"Action": [
"ecs:DescribeInstances"
],
"Resource": "*",
"Effect": "Allow"
}
]
}
{
"Version": "1",
"Statement": [
{
"Action": [
"vpc:DescribeVSwitchAttributes",
"vpc:DescribeVpcs",
"vpc:DescribeVSwitches"
],
"Resource": "*",
"Effect": "Allow"
},
{
"Action": [
"ecs:CreateSecurityGroup",
"ecs:DescribeSecurityGroups",
"ecs:DescribeSecurityGroupAttribute",
"ecs:DeleteSecurityGroup",
"ecs:AuthorizeSecurityGroup",
"ecs:CreateNetworkInterface",
"ecs:DeleteNetworkInterface",
"ecs:DescribeNetworkInterfaces",
"ecs:CreateNetworkInterfacePermission",
"ecs:DescribeNetworkInterfacePermissions",
"ecs:DeleteNetworkInterfacePermission"
],
"Resource": "*",
"Effect": "Allow"
}
]
}
{
"Statement": [
{
"Effect": "Allow",
"Action": [
"kms:Listkeys",
"kms:Listaliases",
"kms:ListResourceTags",
"kms:DescribeKey",
"kms:TagResource",
"kms:UntagResource"
],
"Resource": "acs:kms:*:*:*"
},
{
"Effect": "Allow",
"Action": [
"kms:Encrypt",
"kms:Decrypt",
"kms:GenerateDataKey"
],
"Resource": "acs:kms:*:*:*/*",
"Condition": {
"StringEqualsIgnoreCase": {
"kms:tag/acs:nas:instance-encryption": "true"
}
}
}
],
"Version": "1"
}
{
"Version": "1",
"Statement": [
{
"Action": [
"log:PostLogStoreLogs"
],
"Resource": "*",
"Effect": "Allow"
}
]
}
{
"Version": "1",
"Statement": [{
"Action": [
"hbr:OpenHbrService",
"hbr:CreateTrialBackupPlan"
],
"Resource": "*",
"Effect": "Allow"
},
{
"Action": "ram:DeleteServiceLinkedRole",
"Resource": "*",
"Effect": "Allow",
"Condition": {
"StringEquals": {
"ram:ServiceName": "backup.nas.aliyuncs.com"
}
}
},
{
"Action": "ram:CreateServiceLinkedRole",
"Resource": "*",
"Effect": "Allow",
"Condition": {
"StringEquals": {
"ram:ServiceName": "nasbackup.hbr.aliyuncs.com"
}
}
}
]
}
{
"Version": "1",
"Statement": [
{
"Action": "ram:DeleteServiceLinkedRole",
"Resource": "*",
"Effect": "Allow",
"Condition": {
"StringEquals": {
"ram:ServiceName": "ecs-handler.nas.aliyuncs.com"
}
}
},
{
"Effect": "Allow",
"Action": [
"ecs:InvokeCommand"
],
"Resource": [
"acs:ecs:*:*:instance/*",
"acs:ecs:*:*:command/cmd-ACS-NAS-ClickMount-*"
]
},
{
"Effect": "Allow",
"Action": [
"ecs:DescribeInstances",
"ecs:DescribeCloudAssistantStatus"
],
"Resource": [
"acs:ecs:*:*:instance/*"
]
},
{
"Effect": "Allow",
"Action": [
"ecs:DescribeInvocations",
"ecs:DescribeInvocationResults"
],
"Resource": [
"*"
]
}
]
}
删除NAS服务关联角色
如果您暂时不需要使用NAS服务关联角色，例如不需要创建用户管理密钥（KMS）加密的文件系统时，可以删除NAS服务关联角色。删除时，请先删除该角色关联的文件系统实例。具体操作，请参见删除文件系统和删除服务关联角色。
常见问题
为什么我的RAM用户无法自动创建NAS服务关联角色？
只有拥有指定权限的用户，才能自动创建或删除文件存储NAS服务关联角色。当RAM用户无法自动创建文件存储NAS服务关联角色时，需要为RAM用户添加以下权限策略。使用时请将主账号ID替换为实际的阿里云账号（主账号）ID。具体操作，请参见为RAM角色授权。
{
"Statement": [
{
"Action": [
"ram:CreateServiceLinkedRole"
],
"Resource": "acs:ram:*:主账号ID:role/*",
"Effect": "Allow",
"Condition": {
"StringEquals": {
"ram:ServiceName": [
"standard.nas.aliyuncs.com",
"extreme.nas.aliyuncs.com",
"encryption.nas.aliyuncs.com",
"logdelivery.nas.aliyuncs.com",
"ecs-handler.nas.aliyuncs.com"
]
}
}
}
],
"Version": "1"
}