This release is a pre-release and may not be stable for production use.
AWS IoT Construct Library
---
The APIs of higher level constructs in this module are experimental and under active development. They are subject to non-backward compatible changes or removal in any future version. These are not subject to the Semantic Versioning model and breaking changes will be announced in the release notes. This means that while you may use them, you may need to update your source code when upgrading to a newer version of this package.
AWS IoT Core lets you connect billions of IoT devices and route trillions of messages to AWS services without managing infrastructure.
TopicRule
Create a topic rule that give your devices the ability to interact with AWS services. You can create a topic rule with an action that invoke the Lambda action as following:
func = lambda_.Function(self, "MyFunction",
runtime=lambda_.Runtime.NODEJS_LATEST,
handler="index.handler",
code=lambda_.Code.from_inline("""
exports.handler = (event) => {
console.log("It is test for lambda action of AWS IoT Rule.", event);
};""")
)
iot.TopicRule(self, "TopicRule",
topic_rule_name="MyTopicRule", # optional
description="invokes the lambda function", # optional
sql=iot.IotSql.from_string_as_ver20160323("SELECT topic(2) as device_id, timestamp() as timestamp FROM 'device/+/data'"),
actions=[actions.LambdaFunctionAction(func)]
)
Or, you can add an action after constructing the TopicRule instance as following:
# func: lambda.Function
topic_rule = iot.TopicRule(self, "TopicRule",
sql=iot.IotSql.from_string_as_ver20160323("SELECT topic(2) as device_id, timestamp() as timestamp FROM 'device/+/data'")
)
topic_rule.add_action(actions.LambdaFunctionAction(func))
You can also supply errorAction as following,
and the IoT Rule will trigger it if a rule's action is unable to perform:
import aws_cdk.aws_logs as logs
log_group = logs.LogGroup(self, "MyLogGroup")
iot.TopicRule(self, "TopicRule",
sql=iot.IotSql.from_string_as_ver20160323("SELECT topic(2) as device_id, timestamp() as timestamp FROM 'device/+/data'"),
error_action=actions.CloudWatchLogsAction(log_group)
)
If you wanna make the topic rule disable, add property enabled: false as following:
iot.TopicRule(self, "TopicRule",
sql=iot.IotSql.from_string_as_ver20160323("SELECT topic(2) as device_id, timestamp() as timestamp FROM 'device/+/data'"),
enabled=False
)
See also @aws-cdk/aws-iot-actions-alpha for other actions.
Logging
AWS IoT provides a logging feature that allows you to monitor and log AWS IoT activity.
You can enable IoT logging with the following code:
iot.Logging(self, "Logging",
log_level=iot.LogLevel.INFO
)
Note: All logs are forwarded to the AWSIotLogsV2 log group in CloudWatch.
Audit
An AWS IoT Device Defender audit looks at account- and device-related settings and policies to ensure security measures are in place. An audit can help you detect any drifts from security best practices or access policies.
Account Audit Configuration
The IoT audit includes various audit checks, and it is necessary to configure settings to enable those checks.
You can enable an account audit configuration with the following code:
# Audit notification are sent to the SNS topic
# target_topic: sns.ITopic
iot.AccountAuditConfiguration(self, "AuditConfiguration",
target_topic=target_topic
)
By default, all audit checks are enabled, but it is also possible to enable only specific audit checks.
iot.AccountAuditConfiguration(self, "AuditConfiguration",
check_configuration=iot.CheckConfiguration(
# enabled
authenticated_cognito_role_overly_permissive_check=True,
# enabled by default
ca_certificate_expiring_check=undefined,
# disabled
ca_certificate_key_quality_check=False,
conflicting_client_ids_check=False,
device_certificate_age_check=False,
device_certificate_expiring_check=False,
device_certificate_key_quality_check=False,
device_certificate_shared_check=False,
intermediate_ca_revoked_for_active_device_certificates_check=False,
io_t_policy_potential_mis_configuration_check=False,
iot_policy_overly_permissive_check=False,
iot_role_alias_allows_access_to_unused_services_check=False,
iot_role_alias_overly_permissive_check=False,
logging_disabled_check=False,
revoked_ca_certificate_still_active_check=False,
revoked_device_certificate_still_active_check=False,
unauthenticated_cognito_role_overly_permissive_check=False
)
)
To configure the device certificate age check, you can specify the duration for the check:
from aws_cdk import Duration
iot.AccountAuditConfiguration(self, "AuditConfiguration",
check_configuration=iot.CheckConfiguration(
device_certificate_age_check=True,
# The default value is 365 days
# Valid values range from 30 days (minimum) to 3650 days (10 years, maximum)
device_certificate_age_check_duration=Duration.days(365)
)
)
Scheduled Audit
You can create a scheduled audit that is run at a specified time interval. Checks must be enabled for your account by creating AccountAuditConfiguration.
# config: iot.AccountAuditConfiguration
# Daily audit
daily_audit = iot.ScheduledAudit(self, "DailyAudit",
account_audit_configuration=config,
frequency=iot.Frequency.DAILY,
audit_checks=[iot.AuditCheck.AUTHENTICATED_COGNITO_ROLE_OVERLY_PERMISSIVE_CHECK
]
)
# Weekly audit
weekly_audit = iot.ScheduledAudit(self, "WeeklyAudit",
account_audit_configuration=config,
frequency=iot.Frequency.WEEKLY,
day_of_week=iot.DayOfWeek.SUNDAY,
audit_checks=[iot.AuditCheck.CA_CERTIFICATE_EXPIRING_CHECK
]
)
# Monthly audit
monthly_audit = iot.ScheduledAudit(self, "MonthlyAudit",
account_audit_configuration=config,
frequency=iot.Frequency.MONTHLY,
day_of_month=iot.DayOfMonth.of(1),
audit_checks=[iot.AuditCheck.CA_CERTIFICATE_KEY_QUALITY_CHECK
]
)
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