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rabbitmq.js
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rabbitmq.js
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'use strict';
class AwsCompileRabbitMQEvents {
constructor(serverless) {
this.serverless = serverless;
this.provider = this.serverless.getProvider('aws');
this.hooks = {
'package:compileEvents': this.compileRabbitMQEvents.bind(this),
};
this.serverless.configSchemaHandler.defineFunctionEvent('aws', 'rabbitmq', {
type: 'object',
properties: {
arn: {
anyOf: [
{
type: 'string',
pattern: 'arn:[a-z-]+:mq:[a-z0-9-]+:\\d+:broker:[A-Za-z0-9/_+=.@-]+:b-[a-z0-9-]+',
},
{ $ref: '#/definitions/awsCfImport' },
{ $ref: '#/definitions/awsCfRef' },
],
},
basicAuthArn: {
anyOf: [
{ $ref: '#/definitions/awsSecretsManagerArnString' },
{ $ref: '#/definitions/awsCfImport' },
{ $ref: '#/definitions/awsCfRef' },
],
},
batchSize: {
type: 'number',
minimum: 1,
maximum: 10000,
},
enabled: {
type: 'boolean',
},
queue: {
type: 'string',
},
},
additionalProperties: false,
required: ['basicAuthArn', 'arn', 'queue'],
});
}
compileRabbitMQEvents() {
this.serverless.service.getAllFunctions().forEach((functionName) => {
const functionObj = this.serverless.service.getFunction(functionName);
const cfTemplate = this.serverless.service.provider.compiledCloudFormationTemplate;
// It is required to add the following statement in order to be able to connect to RabbitMQ cluster
const ec2Statement = {
Effect: 'Allow',
Action: [
'ec2:CreateNetworkInterface',
'ec2:DescribeNetworkInterfaces',
'ec2:DescribeVpcs',
'ec2:DeleteNetworkInterface',
'ec2:DescribeSubnets',
'ec2:DescribeSecurityGroups',
],
Resource: '*',
};
// The omission of kms:Decrypt is intentional, since we won't know
// which resources should be valid to decrypt. It's also probably
// not best practice to allow '*' for this.
const secretsManagerStatement = {
Effect: 'Allow',
Action: ['secretsmanager:GetSecretValue'],
Resource: [],
};
const brokerStatement = {
Effect: 'Allow',
Action: ['mq:DescribeBroker'],
Resource: [],
};
let hasMQEvent = false;
functionObj.events.forEach((event) => {
if (!event.rabbitmq) return;
hasMQEvent = true;
const { basicAuthArn, arn, batchSize, enabled, queue } = event.rabbitmq;
const mqEventLogicalId = this.provider.naming.getRabbitMQEventLogicalId(
functionName,
queue
);
const lambdaLogicalId = this.provider.naming.getLambdaLogicalId(functionName);
const dependsOn = this.provider.resolveFunctionIamRoleResourceName(functionObj) || [];
const mqResource = {
Type: 'AWS::Lambda::EventSourceMapping',
DependsOn: dependsOn,
Properties: {
FunctionName: {
'Fn::GetAtt': [lambdaLogicalId, 'Arn'],
},
EventSourceArn: arn,
Queues: [queue],
SourceAccessConfigurations: [
{
Type: 'BASIC_AUTH',
URI: basicAuthArn,
},
],
},
};
if (batchSize) {
mqResource.Properties.BatchSize = batchSize;
}
if (enabled != null) {
mqResource.Properties.Enabled = enabled;
}
brokerStatement.Resource.push(arn);
secretsManagerStatement.Resource.push(basicAuthArn);
cfTemplate.Resources[mqEventLogicalId] = mqResource;
});
// https://docs.aws.amazon.com/lambda/latest/dg/with-mq.html#events-mq-permissions
if (cfTemplate.Resources.IamRoleLambdaExecution && hasMQEvent) {
const statement =
cfTemplate.Resources.IamRoleLambdaExecution.Properties.Policies[0].PolicyDocument
.Statement;
statement.push(secretsManagerStatement);
statement.push(brokerStatement);
statement.push(ec2Statement);
}
});
}
}
module.exports = AwsCompileRabbitMQEvents;