You can use Amazon CloudWatch Logs to monitor, store, and access your log files from EC2 instances, CloudTrail, and other sources. You can then retrieve the associated log data from CloudWatch Logs using the CloudWatch console. Alternatively, you can use CloudWatch Logs commands in the Amazon Web Services CLI, CloudWatch Logs API, or CloudWatch Logs SDK.
You can use CloudWatch Logs to:
Monitor logs from EC2 instances in real time: You can use CloudWatch Logs to monitor applications and systems using log data. For example, CloudWatch Logs can track the number of errors that occur in your application logs. Then, it can send you a notification whenever the rate of errors exceeds a threshold that you specify. CloudWatch Logs uses your log data for monitoring so no code changes are required. For example, you can monitor application logs for specific literal terms (such as "NullReferenceException"). You can also count the number of occurrences of a literal term at a particular position in log data (such as "404" status codes in an Apache access log). When the term you are searching for is found, CloudWatch Logs reports the data to a CloudWatch metric that you specify.
Monitor CloudTrail logged events: You can create alarms in CloudWatch and receive notifications of particular API activity as captured by CloudTrail. You can use the notification to perform troubleshooting.
Archive log data: You can use CloudWatch Logs to store your log data in highly durable storage. You can change the log retention setting so that any log events earlier than this setting are automatically deleted. The CloudWatch Logs agent helps to quickly send both rotated and non-rotated log data off of a host and into the log service. You can then access the raw log data when you need it.
cloudwatchlogs(config = list())A client for the service. You can call the service's operations using
syntax like svc$operation(...), where svc is the name you've assigned
to the client. The available operations are listed in the
Operations section.
Optional configuration of credentials, endpoint, and/or region.
access_key_id: AWS access key ID
secret_access_key: AWS secret access key
session_token: AWS temporary session token
profile: The name of a profile to use. If not given, then the default profile is used.
anonymous: Set anonymous credentials.
endpoint: The complete URL to use for the constructed client.
region: The AWS Region used in instantiating the client.
close_connection: Immediately close all HTTP connections.
timeout: The time in seconds till a timeout exception is thrown when attempting to make a connection. The default is 60 seconds.
s3_force_path_style: Set this to true to force the request to use path-style addressing, i.e., http://s3.amazonaws.com/BUCKET/KEY.
svc <- cloudwatchlogs(
config = list(
credentials = list(
creds = list(
access_key_id = "string",
secret_access_key = "string",
session_token = "string"
),
profile = "string",
anonymous = "logical"
),
endpoint = "string",
region = "string",
close_connection = "logical",
timeout = "numeric",
s3_force_path_style = "logical"
)
)
| associate_kms_key | Associates the specified KMS key with the specified log group |
| cancel_export_task | Cancels the specified export task |
| create_export_task | Creates an export task so that you can efficiently export data from a log group to an Amazon S3 bucket |
| create_log_group | Creates a log group with the specified name |
| create_log_stream | Creates a log stream for the specified log group |
| delete_account_policy | Deletes a CloudWatch Logs account policy |
| delete_data_protection_policy | Deletes the data protection policy from the specified log group |
| delete_destination | Deletes the specified destination, and eventually disables all the subscription filters that publish to it |
| delete_log_group | Deletes the specified log group and permanently deletes all the archived log events associated with the log group |
| delete_log_stream | Deletes the specified log stream and permanently deletes all the archived log events associated with the log stream |
| delete_metric_filter | Deletes the specified metric filter |
| delete_query_definition | Deletes a saved CloudWatch Logs Insights query definition |
| delete_resource_policy | Deletes a resource policy from this account |
| delete_retention_policy | Deletes the specified retention policy |
| delete_subscription_filter | Deletes the specified subscription filter |
| describe_account_policies | Returns a list of all CloudWatch Logs account policies in the account |
| describe_destinations | Lists all your destinations |
| describe_export_tasks | Lists the specified export tasks |
| describe_log_groups | Lists the specified log groups |
| describe_log_streams | Lists the log streams for the specified log group |
| describe_metric_filters | Lists the specified metric filters |
| describe_queries | Returns a list of CloudWatch Logs Insights queries that are scheduled, running, or have been run recently in this account |
| describe_query_definitions | This operation returns a paginated list of your saved CloudWatch Logs Insights query definitions |
| describe_resource_policies | Lists the resource policies in this account |
| describe_subscription_filters | Lists the subscription filters for the specified log group |
| disassociate_kms_key | Disassociates the associated KMS key from the specified log group |
| filter_log_events | Lists log events from the specified log group |
| get_data_protection_policy | Returns information about a log group data protection policy |
| get_log_events | Lists log events from the specified log stream |
| get_log_group_fields | Returns a list of the fields that are included in log events in the specified log group |
| get_log_record | Retrieves all of the fields and values of a single log event |
| get_query_results | Returns the results from the specified query |
| list_tags_for_resource | Displays the tags associated with a CloudWatch Logs resource |
| list_tags_log_group | The ListTagsLogGroup operation is on the path to deprecation |
| put_account_policy | Creates an account-level data protection policy that applies to all log groups in the account |
| put_data_protection_policy | Creates a data protection policy for the specified log group |
| put_destination | Creates or updates a destination |
| put_destination_policy | Creates or updates an access policy associated with an existing destination |
| put_log_events | Uploads a batch of log events to the specified log stream |
| put_metric_filter | Creates or updates a metric filter and associates it with the specified log group |
| put_query_definition | Creates or updates a query definition for CloudWatch Logs Insights |
| put_resource_policy | Creates or updates a resource policy allowing other Amazon Web Services services to put log events to this account, such as Amazon Route 53 |
| put_retention_policy | Sets the retention of the specified log group |
| put_subscription_filter | Creates or updates a subscription filter and associates it with the specified log group |
| start_query | Schedules a query of a log group using CloudWatch Logs Insights |
| stop_query | Stops a CloudWatch Logs Insights query that is in progress |
| tag_log_group | The TagLogGroup operation is on the path to deprecation |
| tag_resource | Assigns one or more tags (key-value pairs) to the specified CloudWatch Logs resource |
| test_metric_filter | Tests the filter pattern of a metric filter against a sample of log event messages |
| untag_log_group | The UntagLogGroup operation is on the path to deprecation |
| untag_resource | Removes one or more tags from the specified resource |
if (FALSE) {
svc <- cloudwatchlogs()
svc$associate_kms_key(
Foo = 123
)
}
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