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AWS Documentation » Amazon CloudWatch » User Guide » Authentication and Access Control for Amazon CloudWatch Logs » Using Identity-Based Policies (IAM Policies) for CloudWatch Logs

Using Identity-Based Policies (IAM Policies) for CloudWatch Logs

This topic provides examples of identity-based policies in which an account administrator can attach permissions policies to IAM identities (that is, users, groups, and roles).

Important

We recommend that you first review the introductory topics that explain the basic concepts and options available for you to manage access to your CloudWatch Logs resources. For more information, see Overview of Managing Access Permissions to Your CloudWatch Logs Resources.

This topic covers the following:

The following is an example of a permissions policy:

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Action": [
        "logs:CreateLogGroup",
        "logs:CreateLogStream",
        "logs:PutLogEvents",
        "logs:DescribeLogStreams"
    ],
      "Resource": [
        "arn:aws:logs:*:*:*"
    ]
  }
 ]
}

This policy has one statement that grants permissions to create log groups and log streams, to upload log events to log streams, and to list details about log streams.

The wildcard character (*) at the end of the Resource value means that the statement allows permission for the logs:CreateLogGroup, logs:CreateLogStream, logs:PutLogEvents, and logs:DescribeLogStreams actions on any log group. To limit this permission to a specific log group, replace the wildcard character (*) in the resource ARN with the specific log group ARN. For more information about the sections within an IAM policy statement, see IAM Policy Elements Reference in IAM User Guide. For a list showing all of the CloudWatch Logs actions, see CloudWatch Logs Permissions Reference.

Permissions Required to Use the CloudWatch Console

For a user to work with CloudWatch Logs in the CloudWatch console, that user must have a minimum set of permissions that allows the user to describe other AWS resources in their AWS account. In order to use CloudWatch Logs in the CloudWatch console, you must have permissions from the following services:

  • CloudWatch

  • CloudWatch Logs

  • Amazon ES

  • IAM

  • Kinesis

  • Lambda

  • Amazon S3

If you create an IAM policy that is more restrictive than the minimum required permissions, the console won't function as intended for users with that IAM policy. To ensure that those users can still use the CloudWatch console, also attach the CloudWatchReadOnlyAccess managed policy to the user, as described in AWS Managed (Predefined) Policies for CloudWatch Logs.

You don't need to allow minimum console permissions for users that are making calls only to the AWS CLI or the CloudWatch Logs API.

The full set of permissions required to work with the CloudWatch console for a user who is not using the console to manage log subscriptions are:

  • cloudwatch:getMetricData

  • cloudwatch:listMetrics

  • logs:cancelExportTask

  • logs:createExportTask

  • logs:createLogGroup

  • logs:createLogStream

  • logs:deleteLogGroup

  • logs:deleteLogStream

  • logs:deleteMetricFilter

  • logs:deleteRetentionPolicy

  • logs:deleteSubscriptionFilter

  • logs:describeExportTasks

  • logs:describeLogGroups

  • logs:describeLogStreams

  • logs:describeMetricFilters

  • logs:describeSubscriptionFilters

  • logs:filterLogEvents

  • logs:getLogEvents

  • logs:putMetricFilter

  • logs:putRetentionPolicy

  • logs:putSubscriptionFilter

  • logs:testMetricFilter

For a user who will also be using the console to manage log subscriptions, the following permissions are also required:

  • es:describeElasticsearchDomain

  • es:listDomainNames

  • iam:attachRolePolicy

  • iam:createRole

  • iam:getPolicy

  • iam:getPolicyVersion

  • iam:getRole

  • iam:listAttachedRolePolicies

  • iam:listRoles

  • kinesis:describeStreams

  • kinesis:listStreams

  • lambda:addPermission

  • lambda:createFunction

  • lambda:getFunctionConfiguration

  • lambda:listAliases

  • lambda:listFunctions

  • lambda:listVersionsByFunction

  • lambda:removePermission

  • s3:listBuckets

AWS Managed (Predefined) Policies for CloudWatch Logs

AWS addresses many common use cases by providing standalone IAM policies that are created and administered by AWS. Managed policies grant necessary permissions for common use cases so you can avoid having to investigate what permissions are needed. For more information, see AWS Managed Policies in the IAM User Guide.

The following AWS managed policies, which you can attach to users in your account, are specific to CloudWatch Logs:

  • CloudWatchLogsFullAccess – Grants full access to CloudWatch Logs.

  • CloudWatchLogsReadOnlyAccess – Grants read-only access to CloudWatch Logs.

Note

You can review these permissions policies by signing in to the IAM console and searching for specific policies there.

You can also create your own custom IAM policies to allow permissions for CloudWatch Logs actions and resources. You can attach these custom policies to the IAM users or groups that require those permissions.

Customer Managed Policy Examples

In this section, you can find example user policies that grant permissions for various CloudWatch Logs actions. These policies work when you are using the CloudWatch Logs API, AWS SDKs, or the AWS CLI.

Example 1: Allow Full Access to CloudWatch Logs

The following policy allows a user to access all CloudWatch Logs actions.

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Action": [
        "logs:*"
      ],
      "Effect": "Allow",
      "Resource": "*"
    }
  ]
}

Example 2: Allow Read-Only Access to CloudWatch Logs

The following policy allows a user read-only access to CloudWatch Logs data.

{
   "Version":"2012-10-17",
   "Statement":[
      {
         "Action":[
            "logs:Describe*",
            "logs:Get*",
            "logs:TestMetricFilter",
            "logs:FilterLogEvents"
         ],
         "Effect":"Allow",
         "Resource":"*"
      }
   ]
}