AWS CLI Command Reference

[ aws . ec2 ]

describe-flow-logs

Description

Describes one or more flow logs. To view the information in your flow logs (the log streams for the network interfaces), you must use the CloudWatch Logs console or the CloudWatch Logs API.

See also: AWS API Documentation

See ‘aws help’ for descriptions of global parameters.

describe-flow-logs is a paginated operation. Multiple API calls may be issued in order to retrieve the entire data set of results. You can disable pagination by providing the --no-paginate argument. When using --output text and the --query argument on a paginated response, the --query argument must extract data from the results of the following query expressions: FlowLogs

Synopsis

  describe-flow-logs
[--dry-run | --no-dry-run]
[--filter <value>]
[--flow-log-ids <value>]
[--cli-input-json | --cli-input-yaml]
[--starting-token <value>]
[--page-size <value>]
[--max-items <value>]
[--generate-cli-skeleton <value>]

Options

--dry-run | --no-dry-run (boolean)

Checks whether you have the required permissions for the action, without actually making the request, and provides an error response. If you have the required permissions, the error response is DryRunOperation . Otherwise, it is UnauthorizedOperation .

--filter (list)

One or more filters.

  • deliver-log-status - The status of the logs delivery (SUCCESS | FAILED ).

  • log-destination-type - The type of destination to which the flow log publishes data. Possible destination types include cloud-watch-logs and s3 .

  • flow-log-id - The ID of the flow log.

  • log-group-name - The name of the log group.

  • resource-id - The ID of the VPC, subnet, or network interface.

  • traffic-type - The type of traffic (ACCEPT | REJECT | ALL ).

  • tag :<key> - The key/value combination of a tag assigned to the resource. Use the tag key in the filter name and the tag value as the filter value. For example, to find all resources that have a tag with the key Owner and the value TeamA , specify tag:Owner for the filter name and TeamA for the filter value.

  • tag-key - The key of a tag assigned to the resource. Use this filter to find all resources assigned a tag with a specific key, regardless of the tag value.

(structure)

A filter name and value pair that is used to return a more specific list of results from a describe operation. Filters can be used to match a set of resources by specific criteria, such as tags, attributes, or IDs.

Name -> (string)

The name of the filter. Filter names are case-sensitive.

Values -> (list)

The filter values. Filter values are case-sensitive.

(string)

Shorthand Syntax:

Name=string,Values=string,string ...

JSON Syntax:

[
  {
    "Name": "string",
    "Values": ["string", ...]
  }
  ...
]

--flow-log-ids (list)

One or more flow log IDs.

Constraint: Maximum of 1000 flow log IDs.

(string)

Syntax:

"string" "string" ...

--cli-input-json | --cli-input-yaml (string) Reads arguments from the JSON string provided. The JSON string follows the format provided by --generate-cli-skeleton. If other arguments are provided on the command line, those values will override the JSON-provided values. It is not possible to pass arbitrary binary values using a JSON-provided value as the string will be taken literally. This may not be specified along with --cli-input-yaml.

--starting-token (string)

A token to specify where to start paginating. This is the NextToken from a previously truncated response.

For usage examples, see Pagination in the AWS Command Line Interface User Guide .

--page-size (integer)

The size of each page to get in the AWS service call. This does not affect the number of items returned in the command’s output. Setting a smaller page size results in more calls to the AWS service, retrieving fewer items in each call. This can help prevent the AWS service calls from timing out.

For usage examples, see Pagination in the AWS Command Line Interface User Guide .

--max-items (integer)

The total number of items to return in the command’s output. If the total number of items available is more than the value specified, a NextToken is provided in the command’s output. To resume pagination, provide the NextToken value in the starting-token argument of a subsequent command. Do not use the NextToken response element directly outside of the AWS CLI.

For usage examples, see Pagination in the AWS Command Line Interface User Guide .

--generate-cli-skeleton (string) Prints a JSON skeleton to standard output without sending an API request. If provided with no value or the value input, prints a sample input JSON that can be used as an argument for --cli-input-json. Similarly, if provided yaml-input it will print a sample input YAML that can be used with --cli-input-yaml. If provided with the value output, it validates the command inputs and returns a sample output JSON for that command.

See ‘aws help’ for descriptions of global parameters.

Examples

Example 1: To describe all of your flow logs

The following describe-flow-logs example displays details for all of your flow logs.

aws ec2 describe-flow-logs

Output:

{
    "FlowLogs": [
        {
            "CreationTime": "2018-02-21T13:22:12.644Z",
            "DeliverLogsPermissionArn": "arn:aws:iam::123456789012:role/flow-logs-role",
            "DeliverLogsStatus": "SUCCESS",
            "FlowLogId": "fl-aabbccdd112233445",
            "MaxAggregationInterval": 600,
            "FlowLogStatus": "ACTIVE",
            "LogGroupName": "FlowLogGroup",
            "ResourceId": "subnet-12345678901234567",
            "TrafficType": "ALL",
            "LogDestinationType": "cloud-watch-logs",
            "LogFormat": "${version} ${account-id} ${interface-id} ${srcaddr} ${dstaddr} ${srcport} ${dstport} ${protocol} ${packets} ${bytes} ${start} ${end} ${action} ${log-status}"
        },
        {
            "CreationTime": "2020-02-04T15:22:29.986Z",
            "DeliverLogsStatus": "SUCCESS",
            "FlowLogId": "fl-01234567890123456",
            "MaxAggregationInterval": 60,
            "FlowLogStatus": "ACTIVE",
            "ResourceId": "vpc-00112233445566778",
            "TrafficType": "ACCEPT",
            "LogDestinationType": "s3",
            "LogDestination": "arn:aws:s3:::my-flow-log-bucket/custom",
            "LogFormat": "${version} ${vpc-id} ${subnet-id} ${instance-id} ${interface-id} ${account-id} ${type} ${srcaddr} ${dstaddr} ${srcport} ${dstport} ${pkt-srcaddr} ${pkt-dstaddr} ${protocol} ${bytes} ${packets} ${start} ${end} ${action} ${tcp-flags} ${log-status}"
        }
    ]
}

Example 2: To describe a subset of your flow logs

The following describe-flow-logs example uses a filter to display details for only those flow logs that are in the specified log group in Amazon CloudWatch Logs.

aws ec2 describe-flow-logs \
    --filter "Name=log-group-name,Values=MyFlowLogs"

Output

FlowLogs -> (list)

Information about the flow logs.

(structure)

Describes a flow log.

CreationTime -> (timestamp)

The date and time the flow log was created.

DeliverLogsErrorMessage -> (string)

Information about the error that occurred. Rate limited indicates that CloudWatch Logs throttling has been applied for one or more network interfaces, or that you’ve reached the limit on the number of log groups that you can create. Access error indicates that the IAM role associated with the flow log does not have sufficient permissions to publish to CloudWatch Logs. Unknown error indicates an internal error.

DeliverLogsPermissionArn -> (string)

The ARN of the IAM role that posts logs to CloudWatch Logs.

DeliverLogsStatus -> (string)

The status of the logs delivery (SUCCESS | FAILED ).

FlowLogId -> (string)

The flow log ID.

FlowLogStatus -> (string)

The status of the flow log (ACTIVE ).

LogGroupName -> (string)

The name of the flow log group.

ResourceId -> (string)

The ID of the resource on which the flow log was created.

TrafficType -> (string)

The type of traffic captured for the flow log.

LogDestinationType -> (string)

The type of destination to which the flow log data is published. Flow log data can be published to CloudWatch Logs or Amazon S3.

LogDestination -> (string)

The destination to which the flow log data is published. Flow log data can be published to an CloudWatch Logs log group or an Amazon S3 bucket. If the flow log publishes to CloudWatch Logs, this element indicates the Amazon Resource Name (ARN) of the CloudWatch Logs log group to which the data is published. If the flow log publishes to Amazon S3, this element indicates the ARN of the Amazon S3 bucket to which the data is published.

LogFormat -> (string)

The format of the flow log record.

Tags -> (list)

The tags for the flow log.

(structure)

Describes a tag.

Key -> (string)

The key of the tag.

Constraints: Tag keys are case-sensitive and accept a maximum of 127 Unicode characters. May not begin with aws: .

Value -> (string)

The value of the tag.

Constraints: Tag values are case-sensitive and accept a maximum of 255 Unicode characters.

MaxAggregationInterval -> (integer)

The maximum interval of time, in seconds, during which a flow of packets is captured and aggregated into a flow log record.

When a network interface is attached to a Nitro-based instance , the aggregation interval is always 60 seconds (1 minute) or less, regardless of the specified value.

Valid Values: 60 | 600

DestinationOptions -> (structure)

The destination options.

FileFormat -> (string)

The format for the flow log.

HiveCompatiblePartitions -> (boolean)

Indicates whether to use Hive-compatible prefixes for flow logs stored in Amazon S3.

PerHourPartition -> (boolean)

Indicates whether to partition the flow log per hour.

NextToken -> (string)

The token to use to retrieve the next page of results. This value is null when there are no more results to return.

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