@cdklabs/cdk-amazonmq
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131 lines • 22.5 kB
JavaScript
;
var _a;
Object.defineProperty(exports, "__esModule", { value: true });
exports.EventSourceBase = void 0;
const JSII_RTTI_SYMBOL_1 = Symbol.for("jsii.rtti");
/*
Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
SPDX-License-Identifier: Apache-2.0
*/
const aws_cdk_lib_1 = require("aws-cdk-lib");
const aws_iam_1 = require("aws-cdk-lib/aws-iam");
const aws_lambda_1 = require("aws-cdk-lib/aws-lambda");
const custom_resources_1 = require("aws-cdk-lib/custom-resources");
const esm_deleter_is_complete_function_1 = require("./esm-deleter.is-complete-function");
const esm_deleter_on_event_function_1 = require("./esm-deleter.on-event-function");
/**
* Represents an AWS Lambda Event Source Mapping for RabbitMQ. This event source will add additional permissions to
* the AWS Lambda function's IAM Role following https://docs.aws.amazon.com/lambda/latest/dg/with-mq.html#events-mq-permissions
*/
class EventSourceBase {
/**
* Instantiates an AWS Lambda Event Source Mapping for RabbitMQ. This event source will add additional permissions to
* the AWS Lambda function's IAM Role following https://docs.aws.amazon.com/lambda/latest/dg/with-mq.html#events-mq-permissions
*
* @param props properties of the RabbitMQ event source
*/
constructor(props, mqType) {
this.props = props;
this.mqType = mqType;
this.sourceAccessConfigurations = [];
this.props.batchSize !== undefined &&
(0, aws_cdk_lib_1.withResolved)(this.props.batchSize, (batchSize) => {
if (batchSize < 1 || batchSize > 10000) {
throw new Error(`Maximum batch size must be between 1 and 10000 inclusive (given ${this.props.batchSize})`);
}
});
}
bind(target) {
if (this.props.addPermissions === undefined || this.props.addPermissions) {
this.props.credentials.grantRead(target);
target.node.addMetadata("function-mq-permissions", "Additional permissions following https://docs.aws.amazon.com/lambda/latest/dg/with-mq.html#events-mq-permissions");
if (!target.isBoundToVpc) {
// INFO: if the target is VPC bound then CDK attaches
// managed policy AWSLambdaVPCAccessExecutionRole
// which contains the necessary permissions.
target.addToRolePolicy(new aws_iam_1.PolicyStatement({
effect: aws_iam_1.Effect.ALLOW,
actions: [
"ec2:CreateNetworkInterface",
"ec2:DeleteNetworkInterface",
"ec2:DescribeNetworkInterfaces",
"ec2:DescribeSubnets",
],
resources: ["*"],
}));
}
target.addToRolePolicy(new aws_iam_1.PolicyStatement({
effect: aws_iam_1.Effect.ALLOW,
actions: ["mq:DescribeBroker"],
resources: [this.props.broker.arn],
}));
target.addToRolePolicy(new aws_iam_1.PolicyStatement({
effect: aws_iam_1.Effect.ALLOW,
actions: ["ec2:DescribeVpcs", "ec2:DescribeSecurityGroups"],
resources: ["*"],
}));
}
this.sourceAccessConfigurations.push({
type: aws_lambda_1.SourceAccessConfigurationType.BASIC_AUTH,
uri: this.props.credentials.secretArn,
});
// TODO: move ID generation outside as an abstract protected method
const mapping = target.addEventSourceMapping(`MqEventSource:${aws_cdk_lib_1.Names.nodeUniqueId(this.props.broker.node)}${this.props.queueName}`, {
batchSize: this.props.batchSize,
maxBatchingWindow: this.props.maxBatchingWindow,
enabled: this.props.enabled,
eventSourceArn: this.props.broker.arn,
sourceAccessConfigurations: this.sourceAccessConfigurations,
});
const esMapping = mapping.node.defaultChild;
// INFO: even though the property allows an array of items
// there can be no more than one queue
esMapping.addPropertyOverride("Queues", [this.props.queueName]);
// INFO: This is a (hopefully) temporary workaround due to the fact that ESM notifies CFN too early its deletion
// completion and as a result, target's IAM Role is being deleted before ESM is able to assume it to delete the ENIs.
// This in turn causes a deletion failure that requires manual ENIs' deletion to recover.
if (target.role) {
const provider = new custom_resources_1.Provider(mapping, `MqEsmDeleter:${aws_cdk_lib_1.Names.uniqueId(mapping)}`, {
onEventHandler: new esm_deleter_on_event_function_1.EsmDeleterOnEventFunction(mapping, "onevent", {
initialPolicy: [
new aws_iam_1.PolicyStatement({
actions: ["lambda:DeleteEventSourceMapping"],
effect: aws_iam_1.Effect.ALLOW,
resources: [
`arn:${aws_cdk_lib_1.Aws.PARTITION}:lambda:${aws_cdk_lib_1.Aws.REGION}:${aws_cdk_lib_1.Aws.ACCOUNT_ID}:event-source-mapping:${mapping.eventSourceMappingId}`,
],
}),
],
}),
isCompleteHandler: new esm_deleter_is_complete_function_1.EsmDeleterIsCompleteFunction(mapping, "iscomplete", {
initialPolicy: [
new aws_iam_1.PolicyStatement({
actions: ["ec2:DescribeNetworkInterfaces"],
effect: aws_iam_1.Effect.ALLOW,
resources: ["*"],
}),
],
}),
queryInterval: aws_cdk_lib_1.Duration.minutes(1),
});
const cr = new aws_cdk_lib_1.CustomResource(mapping, `MqEsmDeleterCR:${aws_cdk_lib_1.Names.nodeUniqueId(mapping.node)}`, {
serviceToken: provider.serviceToken,
properties: {
MqType: this.mqType,
EsmId: mapping.eventSourceMappingId,
AccountId: aws_cdk_lib_1.Aws.ACCOUNT_ID,
},
});
// INFO: the Amazon MQ service uses this role to provision/deprovision the ESM.
// we need it to remain until the ESM is deleted.
cr.node.addDependency(target.role);
}
}
addToSourceAccessConfigurations(config) {
this.sourceAccessConfigurations.push(config);
}
}
exports.EventSourceBase = EventSourceBase;
_a = JSII_RTTI_SYMBOL_1;
EventSourceBase[_a] = { fqn: "@cdklabs/cdk-amazonmq.EventSourceBase", version: "0.1.8" };
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All Rights Reserved.\nSPDX-License-Identifier: Apache-2.0\n*/\nimport {\n  Aws,\n  CustomResource,\n  Duration,\n  Names,\n  withResolved,\n} from \"aws-cdk-lib\";\nimport { Effect, PolicyStatement } from \"aws-cdk-lib/aws-iam\";\nimport {\n  CfnEventSourceMapping,\n  IEventSource,\n  IFunction,\n  SourceAccessConfiguration,\n  SourceAccessConfigurationType,\n} from \"aws-cdk-lib/aws-lambda\";\nimport { ISecret } from \"aws-cdk-lib/aws-secretsmanager\";\nimport { Provider } from \"aws-cdk-lib/custom-resources\";\nimport { EsmDeleterIsCompleteFunction } from \"./esm-deleter.is-complete-function\";\nimport { EsmDeleterOnEventFunction } from \"./esm-deleter.on-event-function\";\nimport { IBrokerDeployment } from \"../broker-deployment\";\n\nexport interface EventSourceProps {\n  /**\n   * source at the time of invoking your function. Your function receives an\n   * The largest number of records that AWS Lambda will retrieve from your event\n   * event with all the retrieved records.\n   *\n   * Valid Range:\n   * * Minimum value of 1\n   * * Maximum value of: 10000\n   *\n   * @default 100\n   */\n  readonly batchSize?: number;\n\n  /**\n   * The maximum amount of time to gather records before invoking the function.\n   * Maximum of Duration.minutes(5).\n   *\n   * @see https://docs.aws.amazon.com/lambda/latest/dg/invocation-eventsourcemapping.html#invocation-eventsourcemapping-batching\n   *\n   * @default - Duration.millis(500) for Amazon MQ.\n   */\n  readonly maxBatchingWindow?: Duration;\n\n  /**\n   * If the stream event source mapping should be enabled.\n   *\n   * @default true\n   */\n  readonly enabled?: boolean;\n\n  /**\n   * A secret with credentials of the user to use when receiving messages.\n   *\n   * The credentials in the secret have fields required:\n   *  * username\n   *  * password\n   */\n  readonly credentials: ISecret;\n\n  /**\n   * The name of the queue that the function will receive messages from.\n   */\n  readonly queueName: string;\n\n  /**\n   * If the default permissions should be added to the Lambda function's execution role.\n   *\n   * @default true\n   */\n  readonly addPermissions?: boolean;\n}\n\nexport interface EventSourceBaseProps extends EventSourceProps {\n  /**\n   * The Amazon MQ broker deployment to receive messages from.\n   */\n  readonly broker: IBrokerDeployment;\n}\n\n/**\n * Represents an AWS Lambda Event Source Mapping for RabbitMQ. This event source will add additional permissions to\n * the AWS Lambda function's IAM Role following https://docs.aws.amazon.com/lambda/latest/dg/with-mq.html#events-mq-permissions\n */\nexport abstract class EventSourceBase implements IEventSource {\n  private sourceAccessConfigurations: SourceAccessConfiguration[] = [];\n\n  /**\n   * Instantiates an AWS Lambda Event Source Mapping for RabbitMQ. This event source will add additional permissions to\n   * the AWS Lambda function's IAM Role following https://docs.aws.amazon.com/lambda/latest/dg/with-mq.html#events-mq-permissions\n   *\n   * @param props properties of the RabbitMQ event source\n   */\n  constructor(\n    protected readonly props: EventSourceBaseProps,\n    protected readonly mqType: string,\n  ) {\n    this.props.batchSize !== undefined &&\n      withResolved(this.props.batchSize, (batchSize) => {\n        if (batchSize < 1 || batchSize > 10000) {\n          throw new Error(\n            `Maximum batch size must be between 1 and 10000 inclusive (given ${this.props.batchSize})`,\n          );\n        }\n      });\n  }\n\n  bind(target: IFunction): void {\n    if (this.props.addPermissions === undefined || this.props.addPermissions) {\n      this.props.credentials.grantRead(target);\n\n      target.node.addMetadata(\n        \"function-mq-permissions\",\n        \"Additional permissions following https://docs.aws.amazon.com/lambda/latest/dg/with-mq.html#events-mq-permissions\",\n      );\n\n      if (!target.isBoundToVpc) {\n        // INFO: if the target is VPC bound then CDK attaches\n        //       managed policy AWSLambdaVPCAccessExecutionRole\n        //       which contains the necessary permissions.\n        target.addToRolePolicy(\n          new PolicyStatement({\n            effect: Effect.ALLOW,\n            actions: [\n              \"ec2:CreateNetworkInterface\",\n              \"ec2:DeleteNetworkInterface\",\n              \"ec2:DescribeNetworkInterfaces\",\n              \"ec2:DescribeSubnets\",\n            ],\n            resources: [\"*\"],\n          }),\n        );\n      }\n\n      target.addToRolePolicy(\n        new PolicyStatement({\n          effect: Effect.ALLOW,\n          actions: [\"mq:DescribeBroker\"],\n          resources: [this.props.broker.arn],\n        }),\n      );\n\n      target.addToRolePolicy(\n        new PolicyStatement({\n          effect: Effect.ALLOW,\n          actions: [\"ec2:DescribeVpcs\", \"ec2:DescribeSecurityGroups\"],\n          resources: [\"*\"],\n        }),\n      );\n    }\n\n    this.sourceAccessConfigurations.push({\n      type: SourceAccessConfigurationType.BASIC_AUTH,\n      uri: this.props.credentials.secretArn,\n    });\n\n    // TODO: move ID generation outside as an abstract protected method\n    const mapping = target.addEventSourceMapping(\n      `MqEventSource:${Names.nodeUniqueId(this.props.broker.node)}${this.props.queueName}`,\n      {\n        batchSize: this.props.batchSize,\n        maxBatchingWindow: this.props.maxBatchingWindow,\n        enabled: this.props.enabled,\n        eventSourceArn: this.props.broker.arn,\n        sourceAccessConfigurations: this.sourceAccessConfigurations,\n      },\n    );\n\n    const esMapping = mapping.node.defaultChild as CfnEventSourceMapping;\n\n    // INFO: even though the property allows an array of items\n    //       there can be no more than one queue\n    esMapping.addPropertyOverride(\"Queues\", [this.props.queueName]);\n\n    // INFO: This is a (hopefully) temporary workaround due to the fact that ESM notifies CFN too early its deletion\n    //       completion and as a result, target's IAM Role is being deleted before ESM is able to assume it to delete the ENIs.\n    //       This in turn causes a deletion failure that requires manual ENIs' deletion to recover.\n    if (target.role) {\n      const provider = new Provider(\n        mapping,\n        `MqEsmDeleter:${Names.uniqueId(mapping)}`,\n        {\n          onEventHandler: new EsmDeleterOnEventFunction(mapping, \"onevent\", {\n            initialPolicy: [\n              new PolicyStatement({\n                actions: [\"lambda:DeleteEventSourceMapping\"],\n                effect: Effect.ALLOW,\n                resources: [\n                  `arn:${Aws.PARTITION}:lambda:${Aws.REGION}:${Aws.ACCOUNT_ID}:event-source-mapping:${mapping.eventSourceMappingId}`,\n                ],\n              }),\n            ],\n          }),\n          isCompleteHandler: new EsmDeleterIsCompleteFunction(\n            mapping,\n            \"iscomplete\",\n            {\n              initialPolicy: [\n                new PolicyStatement({\n                  actions: [\"ec2:DescribeNetworkInterfaces\"],\n                  effect: Effect.ALLOW,\n                  resources: [\"*\"],\n                }),\n              ],\n            },\n          ),\n          queryInterval: Duration.minutes(1),\n        },\n      );\n\n      const cr = new CustomResource(\n        mapping,\n        `MqEsmDeleterCR:${Names.nodeUniqueId(mapping.node)}`,\n        {\n          serviceToken: provider.serviceToken,\n          properties: {\n            MqType: this.mqType,\n            EsmId: mapping.eventSourceMappingId,\n            AccountId: Aws.ACCOUNT_ID,\n          },\n        },\n      );\n\n      // INFO: the Amazon MQ service uses this role to provision/deprovision the ESM.\n      //       we need it to remain until the ESM is deleted.\n      cr.node.addDependency(target.role);\n    }\n  }\n\n  protected addToSourceAccessConfigurations(config: SourceAccessConfiguration) {\n    this.sourceAccessConfigurations.push(config);\n  }\n}\n"]}