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datadog.ts
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datadog.ts
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/*
* Unless explicitly stated otherwise all files in this repository are licensed
* under the Apache License Version 2.0.
*
* This product includes software developed at Datadog (https://www.datadoghq.com/).
* Copyright 2021 Datadog, Inc.
*/
import * as lambdaPython from "@aws-cdk/aws-lambda-python-alpha";
import { Tags } from "aws-cdk-lib";
import * as lambda from "aws-cdk-lib/aws-lambda";
import * as lambdaNodejs from "aws-cdk-lib/aws-lambda-nodejs";
import * as logs from "aws-cdk-lib/aws-logs";
import { Construct } from "constructs";
import log from "loglevel";
import { Transport } from "./common/transport";
import {
applyLayers,
redirectHandlers,
addForwarder,
addForwarderToLogGroups,
applyEnvVariables,
validateProps,
TagKeys,
DatadogProps,
DatadogStrictProps,
handleSettingPropDefaults,
setGitCommitHashEnvironmentVariable,
setDDEnvVariables,
} from "./index";
const versionJson = require("../version.json");
export class Datadog extends Construct {
scope: Construct;
props: DatadogProps;
transport: Transport;
constructor(scope: Construct, id: string, props: DatadogProps) {
if (process.env.DD_CONSTRUCT_DEBUG_LOGS?.toLowerCase() == "true") {
log.setLevel("debug");
}
super(scope, id);
this.scope = scope;
this.props = props;
validateProps(this.props);
this.transport = new Transport(
this.props.flushMetricsToLogs,
this.props.site,
this.props.apiKey,
this.props.apiKeySecretArn,
this.props.apiKmsKey,
this.props.extensionLayerVersion,
);
}
public addLambdaFunctions(
lambdaFunctions: (lambda.Function | lambdaNodejs.NodejsFunction | lambdaPython.PythonFunction)[],
) {
// baseProps contains all properties set by the user, with default values for properties
// defined in DefaultDatadogProps (if not set by user)
const baseProps: DatadogStrictProps = handleSettingPropDefaults(this.props);
if (this.props !== undefined && lambdaFunctions.length > 0) {
const region = `${lambdaFunctions[0].env.region}`;
log.debug(`Using region: ${region}`);
applyLayers(
this.scope,
region,
lambdaFunctions,
this.props.pythonLayerVersion,
this.props.nodeLayerVersion,
this.props.extensionLayerVersion,
);
redirectHandlers(lambdaFunctions, baseProps.addLayers);
if (this.props.forwarderArn !== undefined) {
if (this.props.extensionLayerVersion !== undefined) {
log.debug(`Skipping adding subscriptions to the lambda log groups since the extension is enabled`);
} else {
log.debug(`Adding log subscriptions using provided Forwarder ARN: ${this.props.forwarderArn}`);
addForwarder(this.scope, lambdaFunctions, this.props.forwarderArn);
}
} else {
log.debug("Forwarder ARN not provided, no log group subscriptions will be added");
}
addCdkConstructVersionTag(lambdaFunctions);
applyEnvVariables(lambdaFunctions, baseProps);
setDDEnvVariables(lambdaFunctions, this.props);
setTags(lambdaFunctions, this.props);
this.transport.applyEnvVars(lambdaFunctions);
}
}
public addGitCommitMetadata(
lambdaFunctions: (lambda.Function | lambdaNodejs.NodejsFunction | lambdaPython.PythonFunction)[],
gitCommitSha: string,
) {
setGitCommitHashEnvironmentVariable(lambdaFunctions, gitCommitSha);
}
public addForwarderToNonLambdaLogGroups(logGroups: logs.ILogGroup[]) {
if (this.props.forwarderArn !== undefined) {
addForwarderToLogGroups(this.scope, logGroups, this.props.forwarderArn);
} else {
log.debug("Forwarder ARN not provided, no non lambda log group subscriptions will be added");
}
}
}
export function addCdkConstructVersionTag(lambdaFunctions: lambda.Function[]) {
log.debug(`Adding CDK Construct version tag: ${versionJson.version}`);
lambdaFunctions.forEach((functionName) => {
Tags.of(functionName).add(TagKeys.CDK, `v${versionJson.version}`, {
includeResourceTypes: ["AWS::Lambda::Function"],
});
});
}
function setTags(lambdaFunctions: lambda.Function[], props: DatadogProps) {
log.debug(`Adding datadog tags`);
lambdaFunctions.forEach((functionName) => {
if (props.forwarderArn) {
if (props.env) {
Tags.of(functionName).add(TagKeys.ENV, props.env);
}
if (props.service) {
Tags.of(functionName).add(TagKeys.SERVICE, props.service);
}
if (props.version) {
Tags.of(functionName).add(TagKeys.VERSION, props.version);
}
if (props.tags) {
const tagsArray = props.tags.split(",");
tagsArray.forEach((tag: string) => {
const [key, value] = tag.split(":");
if (key && value) {
Tags.of(functionName).add(key, value);
}
});
}
}
});
}