Create a custom policy - RAM| Alibaba Cloud Documentation Center

If the system policies provided by Alibaba Cloud Elasticsearch do not meet your requirements, you can create custom policies. Custom policies enable finer-grained permission management than system policies. This topic describes how to create a custom policy and provides policy examples.

Prerequisites

You have understood the policy structure and syntax. For more information, see Policy structure and syntax.

Background information

Elasticsearch supports the following system policies:

AliyunElasticsearchReadOnlyAccess: the read-only permissions on Elasticsearch or Logstash clusters. This policy can be attached to read-only users.
AliyunElasticsearchFullAccess: the management permissions on Elasticsearch or Logstash clusters. This policy can be attached to administrators.

Note

You can use the preceding policies to grant permissions only on Elasticsearch or Logstash clusters to Resource Access Management (RAM) users. The policies do not contain permissions on CloudMonitor or tags. If you want to grant permissions on CloudMonitor or tags, you must create the related custom policies and attach the policies to the RAM users. For more information about how to grant permissions on CloudMonitor or tags, see Policy for an administrator.
By default, Elasticsearch clusters are created in the default resource group. After you attach a custom policy for a specific cluster to a RAM user and use the RAM user to log on to the Elasticsearch console, all the clusters of your Alibaba Cloud account rather than the specific cluster are displayed in the console. If you want the system to display only the specific cluster in the console, you can use a resource group to grant the permissions on the cluster to the RAM user. For more information, see Use a resource group to grant permissions on a specific cluster.

Procedure

Log on to the RAM console by using an Alibaba Cloud account.
In the left-side navigation pane, click Policies under Permissions.
On the Policies page, click Create Policy.
On the Create Custom Policy page, specify the Policy Name and Note parameters.
Under Configuration Mode, select Visualized or Script.
- If you select Visualized, click Add Statement. On the page that appears, configure the permission effect, actions, and resources.
- If you select Script, edit the policy script according to the policy structure and syntax.

In the Policy Document section, select an existing system policy and modify the policy document.

Note You can enter a keyword in the search box to perform a fuzzy search.

Enter a script for the permission that you want to grant. Examples:

Permission to access the virtual private clouds (VPCs) that belong to your Alibaba Cloud account
```
"elasticsearch:DescribeVpcs","elasticsearch:DescribeVswitches"
```
Note For more information about the related policy document, see the document of the AliyunVPCReadOnlyAccess policy.
Permission to pay for orders
```
["bss:PayOrder"] 
```
Note For more information about the related policy document, see the document of the AliyunBSSOrderAccess policy.

Permission to call API operations


Method	URI	Resource	Action
GET	/instances	instances/*	ListInstance
POST	/instances	instances/*	CreateInstance
GET	/instances/$instanceId	instances/$instanceId	DescribeInstance
DELETE	/instances/$instanceId	instances/$instanceId	DeleteInstance
POST	/instances/$instanceId/actions/restart	instances/$instanceId	RestartInstance
PUT	/instances/$instanceId	instances/$instanceId	UpdateInstance

For more information about the related policy document, see Policy examples.

Click OK.

Policy examples

Policy for an administrator

In this example, all the operation permissions on all Elasticsearch clusters are granted to a RAM user of the Alibaba Cloud account whose ID is indicated by <UID>.

{
    "Statement": [
        {
            "Action": [
                "elasticsearch:*"
            ],
            "Effect": "Allow",
            "Resource": "*"
        },
        {
            "Action": [
                "cms:*"
            ],
            "Effect": "Allow",
            "Resource": "*"
        },
        {
            "Action": "bss:PayOrder",
            "Effect": "Allow",
            "Resource": "*"
        },
        {
            "Action": "ram:CreateServiceLinkedRole",
            "Resource": "*",
            "Effect": "Allow",
            "Condition": {
                "StringEquals": {
                    "ram:ServiceName": [
                        "collector.elasticsearch.aliyuncs.com",
                        "ops.elasticsearch.aliyuncs.com"
                    ]
                }
            }
        }
    ],
    "Version": "1"
}

Policy for operation permissions on a specific cluster

In this example, the following permissions are granted to a RAM user of the Alibaba Cloud account whose ID is indicated by <UID>:

Permissions on CloudMonitor
Permission to perform all Elasticsearch-related operations on a specific cluster
Permission to view clusters
Permission to view all the tags that are added to clusters
Permission to view shippers

Note External interfaces that are used to call some services, such as Beats, Advanced Monitoring and Alerting, and Tag, are integrated into the cluster management page of the Elasticsearch console. Therefore, when you grant the permissions on a specific cluster, you must refer to the following sample policy document.

{
    "Statement": [
        {
            "Action": [
                "elasticsearch:*"
            ],
            "Effect": "Allow",
            "Resource": "acs:elasticsearch:*:<UID>:instances/<instanceId>"
        },
        {
            "Action": [
                "cms:DescribeActiveMetricRuleList",
                "cms:ListAlarm",
                "cms:QueryMetricList"
            ],
            "Effect": "Allow",
            "Resource": "*"
        },
        {
            "Action": [
                "elasticsearch:ListTags"
            ],
            "Effect": "Allow",
            "Resource": "acs:elasticsearch:*:<UID>:tags/*"
        },
        {
            "Action": [
                "elasticsearch:ListInstance",
                "elasticsearch:ListSnapshotReposByInstanceId"
            ],
            "Effect": "Allow",
            "Resource": "acs:elasticsearch:*:<UID>:instances/*"
        },
        {
            "Action": [
                "elasticsearch:ListCollectors"
            ],
            "Effect": "Allow",
            "Resource": "acs:elasticsearch:*:<UID>:collectors/*"
        },
        {
            "Action": [
                "elasticsearch:ListLogstash"
            ],
            "Effect": "Allow",
            "Resource": "acs:elasticsearch:*:<UID>:logstashes/*"
        },
        {
            "Action": [
                "elasticsearch:GetEmonProjectList"
            ],
            "Effect": "Allow",
            "Resource": "acs:elasticsearch:*:*:emonProjects/*"
        },
        {
            "Action": [
                "elasticsearch:getEmonUserConfig"
            ],
            "Effect": "Allow",
            "Resource": "acs:elasticsearch:*:*:emonUserConfig/*"
        }
    ],
    "Version": "1"
}

Table 1. Action element
Action	Description
`[ "cms:DescribeActiveMetricRuleList", "cms:ListAlarm", "cms:QueryMetricList" ]`	The permissions on CloudMonitor. `cms:DescribeActiveMetricRuleList`: the permission to query the services for which CloudMonitor is activated within the Alibaba Cloud account. `cms:ListAlarm`: the permission to query all or specific alert rules. `cms:QueryMetricList`: the permission to query the monitoring data of instances or clusters of a specific service within a period.
`[ "bss:PayOrder" ]`	The permission to pay for orders. After the RAM user is granted the permission, the RAM user can pay for purchase orders of resources.
`[ "elasticsearch:DescribeVpcs", "elasticsearch:DescribeVswitches" ]`	The permissions to access the VPCs and vSwitches that belong to the Alibaba Cloud account. After the RAM user is granted the permissions, the RAM user can select the VPC and vSwitch that belong to the Alibaba Cloud account when the user purchases resources. Notice When you authorize a RAM user to purchase resources, you must also specify `["bss:PayOrder"]` in the Action element. If you do not specify ["bss:PayOrder"], the system displays a message that indicates insufficient permissions when you use the RAM user to purchase resources.
`[ "elasticsearch:*" ]`	All operation permissions on Elasticsearch clusters. After the RAM user is granted the permissions, the RAM user can perform operations on all or specific clusters. Notice The permissions specified by `elasticsearch:*` do not include permissions on the Advanced Monitoring and Alerting, CloudMonitor, or Tag service. You must separately specify permissions on these services. If you do not specify permissions on these services, the system displays a message that indicates insufficient permissions after you use the RAM user to go to a related page. However, the RAM user can use other authorized features on this page.
`[ "elasticsearch:ListTags" ]`	The permission to query all the tags that are added to Elasticsearch clusters. After the RAM user is granted the permission, the RAM user can view all the tags that are added to Elasticsearch clusters.
`[ "elasticsearch:ListInstance", "elasticsearch:ListSnapshotReposByInstanceId" ]`	`elasticsearch:ListInstance`: the permission to query Elasticsearch clusters. `elasticsearch:ListSnapshotReposByInstanceId`: the permission to query shared Object Storage Service (OSS) repositories.
`[ "elasticsearch:ListCollectors" ]`	The permission to query Beats shippers. After the RAM user is granted the permission, the RAM user can view all the created Beats shippers in the Elasticsearch console.
`[ "elasticsearch:ListLogstash" ]`	The permission to query Logstash clusters. After the RAM user is granted the permission, the RAM user can view all the Logstash clusters in the related region on the Logstash Clusters page.
`[ "elasticsearch:GetEmonProjectList" ]`	The permission to query the monitoring items of a cluster. Notice If the RAM user is granted the permission, the `["elasticsearch:getEmonUserConfig"]` permission must also be granted. If ["elasticsearch:getEmonUserConfig"] is not granted, the system displays a message that indicates insufficient permissions when you use the RAM user to go to the cluster monitoring page.
`[ "elasticsearch:getEmonUserConfig" ]`	The permission to query the user configurations for cluster monitoring.

Table 2. Effect element
Effect	Description
Allow	Indicates that the RAM user is allowed to perform the operations that are specified in the Action element.
Deny	Indicates that the RAM user is not allowed to perform the operations that are specified in the Action element.

Note

<UID>: Set this parameter to the ID of your Alibaba Cloud account. To obtain the ID, move the pointer over the profile picture in the upper-right corner of the Elasticsearch console and click Security Settings. The value of Account ID on the Security Settings page is the ID of your Alibaba Cloud account.
<instanceId>: Set this parameter to the ID of the cluster whose permissions you want to grant. For more information about how to obtain the ID, see View the basic information of a cluster.
In the Resource element, an asterisk (*) indicates all clusters, and <instanceId> indicates a specific cluster. For more information, see Types of resources that can be authorized.

What to do next

After a custom policy is created, use your Alibaba Cloud account to attach the policy to a RAM user in the RAM console or by using a RAM SDK. For more information, see Grant permissions to a RAM user.