@matthewbonig/rds-tools/lib/DatabaseScript.js

A construct for working with RDS SQL servers

"use strict";
var _a;
Object.defineProperty(exports, "__esModule", { value: true });
exports.DatabaseScript = void 0;
const JSII_RTTI_SYMBOL_1 = Symbol.for("jsii.rtti");
const child_process_1 = require("child_process");
const os = require("os");
const path = require("path");
const aws_cdk_lib_1 = require("aws-cdk-lib");
const constructs_1 = require("constructs");
class DatabaseScript extends constructs_1.Construct {
    constructor(scope, id, props) {
        super(scope, id);
        const secret = props.secret || props.databaseInstance?.secret;
        if (!secret) {
            throw new Error('You must either provide a secret or there must be one available on the databaseInstance');
        }
        const vpc = props.vpc || props.databaseInstance?.vpc;
        if (!vpc) {
            throw new Error('Please provide a VPC to use, either on the `vpc` prop or via the `databaseInstance` prop.');
        }
        const assetPath = path.join(__dirname, 'layer');
        this.providerLayer = new aws_cdk_lib_1.aws_lambda.LayerVersion(this, `${id}-deps-layer`, {
            code: aws_cdk_lib_1.aws_lambda.Code.fromAsset(assetPath, {
                bundling: {
                    image: aws_cdk_lib_1.aws_lambda.Runtime.NODEJS_16_X.bundlingImage,
                    command: [
                        'bash', '-c',
                        'echo npm i && cp -r /asset-input/* /asset-output',
                    ],
                    environment: {
                        npm_config_cache: 'npm-cache',
                    },
                    user: 'root',
                    workingDirectory: '/asset-input/nodejs',
                    local: {
                        tryBundle(outputDir) {
                            console.log('Going to try local bundling...');
                            if (os.platform() !== 'linux') {
                                console.warn('When using local bundling on another OS besides linux, you may end up building dependencies that will not run on AWS Lambda. Please build on a linux OS if you run into issues.');
                            }
                            const execOptions = { stdio: ['ignore', process.stderr, 'inherit'] };
                            try {
                                const layerDir = path.join(__dirname, 'layer');
                                (0, child_process_1.execSync)('npm install', {
                                    ...execOptions,
                                    cwd: path.join(layerDir, 'nodejs'),
                                });
                                (0, child_process_1.execSync)(`mkdir -p ${outputDir}/nodejs/node_modules`, { ...execOptions });
                                (0, child_process_1.execSync)(`cp -r ${layerDir}/nodejs/node_modules/* ${outputDir}/nodejs/node_modules`, { ...execOptions });
                            }
                            catch {
                                return false;
                            }
                            return true;
                        },
                    },
                },
            }),
        });
        const handler = this.handler = this.createLambda('cr', props, vpc, secret);
        new aws_cdk_lib_1.CustomResource(this, `${id}-customResource`, {
            serviceToken: handler.functionArn,
            properties: {
                script: props.script,
                databaseName: props.databaseName,
            },
        });
        if (props.enableAdhoc) {
            this.adhocHandler = this.createLambda('adhoc', props, vpc, secret, 'adhocHandler');
        }
    }
    get connections() {
        return this.handler.connections;
    }
    get adhocConnections() {
        if (!this.adhocHandler) {
            throw new Error('Please enable the adhoc handler using the enableAdhoc prop.');
        }
        return this.adhocHandler?.connections;
    }
    /**
     * Grants access to the Lambda Function to the given SecurityGroup.
     * Adds an ingress rule to the given security group and for the given port.
     * @deprecated Do not use, pass this construct as an IConnectable
     * @param securityGroup
     * @param port
     */
    bind(securityGroup, port) {
        securityGroup.addIngressRule(this.handler.connections.securityGroups[0], port, 'access from Lambda ' + this.handler.node.id);
        return this;
    }
    slugify(x) {
        return x.replace(/[^a-zA-Z0-9]/g, '');
    }
    createLambda(id, props, vpc, secret, handler) {
        const handlerFunction = this.ensureLambda(`${props.databaseInstance?.node.id ?? props.secret?.node.id}-${id}`, {
            entry: path.join(__dirname, 'handlers', 'index.ts'),
            depsLockFilePath: path.join(__dirname, 'handlers', 'package-lock.json'),
            handler: handler ?? 'handler',
            runtime: aws_cdk_lib_1.aws_lambda.Runtime.NODEJS_16_X,
            vpc: vpc,
            environment: {
                SECRET_ARN: secret.secretArn,
            },
            bundling: {
                externalModules: ['aws-sdk', 'mssql', 'promise-mysql', 'pg'],
            },
            timeout: aws_cdk_lib_1.Duration.seconds(15),
            logRetention: aws_cdk_lib_1.aws_logs.RetentionDays.ONE_DAY,
        });
        handlerFunction.addLayers(this.providerLayer);
        secret.grantRead(handlerFunction);
        return handlerFunction;
    }
    ensureLambda(id, props) {
        // TODO: Copy-pasted from CDK codebase until
        //       https://github.com/aws/aws-cdk/issues/6261 is fixed and we can
        //       use a proper SingletonFunction
        const constructName = this.slugify(id) + 'singl';
        const existing = aws_cdk_lib_1.Stack.of(this).node.tryFindChild(constructName);
        if (existing) {
            return existing;
        }
        return new aws_cdk_lib_1.aws_lambda_nodejs.NodejsFunction(aws_cdk_lib_1.Stack.of(this), constructName, props);
    }
}
exports.DatabaseScript = DatabaseScript;
_a = JSII_RTTI_SYMBOL_1;
DatabaseScript[_a] = { fqn: "@matthewbonig/rds-tools.DatabaseScript", version: "2.0.19" };
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If one is not provide, it's assumed from the database instance.\n   */\n  readonly vpc?: ec2.IVpc;\n\n  /**\n   * An optional databaseName. If none is provided then it will be the default for the rds instance, as defined by the AWS docs.\n   *\n   * mysql - mysql\n   * mssql - master\n   * postgres - postgres\n   *\n   */\n  readonly databaseName?: string;\n\n  /**\n   * The database instance to run the script against\n   */\n  readonly databaseInstance?: aws_rds.DatabaseInstance;\n\n  /**\n   * An optional secret that provides credentials for the database. Must have fields 'username' and 'password'\n   *\n   * @default the root secret from the database instance\n   */\n  readonly secret?: aws_secretsmanager.ISecret;\n\n  /**\n   * The script to execute.\n   */\n  readonly script: string;\n\n  /**\n   * Deploy a second Lambda function that allows for adhoc sql against the database?\n   *\n   * @default false\n   */\n  readonly enableAdhoc?: boolean;\n}\n\nexport class DatabaseScript extends Construct implements IConnectable {\n\n  /**\n   * The underlying Lambda handler function for making adhoc commands against the database.\n   * Undefined unless 'enableAdhoc' is true\n   */\n  adhocHandler?: aws_lambda.IFunction;\n  readonly handler: aws_lambda.IFunction;\n  private readonly providerLayer: aws_lambda.LayerVersion;\n\n  constructor(scope: Construct, id: string, props: DatabaseScriptProps) {\n    super(scope, id);\n\n    const secret = props.secret || props.databaseInstance?.secret;\n    if (!secret) {\n      throw new Error('You must either provide a secret or there must be one available on the databaseInstance');\n    }\n\n    const vpc = props.vpc || props.databaseInstance?.vpc;\n    if (!vpc) {\n      throw new Error('Please provide a VPC to use, either on the `vpc` prop or via the `databaseInstance` prop.');\n    }\n\n    const assetPath = path.join(__dirname, 'layer');\n    this.providerLayer = new aws_lambda.LayerVersion(this, `${id}-deps-layer`, {\n      code: aws_lambda.Code.fromAsset(assetPath, {\n        bundling: {\n          image: aws_lambda.Runtime.NODEJS_16_X.bundlingImage,\n          command: [\n            'bash', '-c',\n            'echo npm i && cp -r /asset-input/* /asset-output',\n          ],\n          environment: {\n            npm_config_cache: 'npm-cache',\n          },\n          user: 'root',\n          workingDirectory: '/asset-input/nodejs',\n          local: {\n            tryBundle(outputDir: string): boolean {\n              console.log('Going to try local bundling...');\n              if (os.platform() !== 'linux') {\n                console.warn('When using local bundling on another OS besides linux, you may end up building dependencies that will not run on AWS Lambda. Please build on a linux OS if you run into issues.');\n              }\n              const execOptions: ExecSyncOptions = { stdio: ['ignore', process.stderr, 'inherit'] };\n              try {\n                const layerDir = path.join(__dirname, 'layer');\n                execSync('npm install', {\n                  ...execOptions,\n                  cwd: path.join(layerDir, 'nodejs'),\n                });\n                execSync(`mkdir -p ${outputDir}/nodejs/node_modules`, { ...execOptions });\n                execSync(`cp -r ${layerDir}/nodejs/node_modules/* ${outputDir}/nodejs/node_modules`, { ...execOptions });\n\n              } catch {\n                return false;\n              }\n              return true;\n            },\n          },\n        },\n      }),\n    });\n\n    const handler = this.handler = this.createLambda('cr', props, vpc, secret);\n    new CustomResource(this, `${id}-customResource`, {\n      serviceToken: handler.functionArn,\n      properties: {\n        script: props.script,\n        databaseName: props.databaseName,\n      },\n    });\n\n    if (props.enableAdhoc) {\n      this.adhocHandler = this.createLambda('adhoc', props, vpc, secret, 'adhocHandler');\n    }\n\n  }\n\n  get connections(): Connections {\n    return this.handler.connections;\n  }\n\n  get adhocConnections(): Connections {\n    if (!this.adhocHandler) {\n      throw new Error('Please enable the adhoc handler using the enableAdhoc prop.');\n    }\n    return this.adhocHandler?.connections;\n  }\n\n  /**\n   * Grants access to the Lambda Function to the given SecurityGroup.\n   * Adds an ingress rule to the given security group and for the given port.\n   * @deprecated Do not use, pass this construct as an IConnectable\n   * @param securityGroup\n   * @param port\n   */\n  bind(securityGroup: ec2.SecurityGroup, port: ec2.Port): DatabaseScript {\n    securityGroup.addIngressRule(this.handler.connections.securityGroups[0], port, 'access from Lambda ' + this.handler.node.id);\n    return this;\n  }\n\n  slugify(x: string): string {\n    return x.replace(/[^a-zA-Z0-9]/g, '');\n  }\n\n  private createLambda(id: string, props: DatabaseScriptProps, vpc: IVpc, secret: ISecret, handler?: string) {\n    const handlerFunction = this.ensureLambda(`${props.databaseInstance?.node.id ?? props.secret?.node.id}-${id}`, {\n      entry: path.join(__dirname, 'handlers', 'index.ts'),\n      depsLockFilePath: path.join(__dirname, 'handlers', 'package-lock.json'),\n      handler: handler ?? 'handler',\n      runtime: aws_lambda.Runtime.NODEJS_16_X,\n      vpc: vpc,\n      environment: {\n        SECRET_ARN: secret.secretArn,\n      },\n      bundling: {\n        externalModules: ['aws-sdk', 'mssql', 'promise-mysql', 'pg'],\n      },\n      timeout: Duration.seconds(15), // TODO: should be overridable\n      logRetention: aws_logs.RetentionDays.ONE_DAY,\n    });\n\n    handlerFunction.addLayers(this.providerLayer);\n\n    secret.grantRead(handlerFunction);\n    return handlerFunction;\n  }\n\n  private ensureLambda(id: string, props: aws_lambda_nodejs.NodejsFunctionProps): aws_lambda_nodejs.NodejsFunction {\n    // TODO: Copy-pasted from CDK codebase until\n    //       https://github.com/aws/aws-cdk/issues/6261 is fixed and we can\n    //       use a proper SingletonFunction\n    const constructName = this.slugify(id) + 'singl';\n    const existing = Stack.of(this).node.tryFindChild(constructName);\n    if (existing) {\n      return existing as aws_lambda_nodejs.NodejsFunction;\n    }\n    return new aws_lambda_nodejs.NodejsFunction(Stack.of(this), constructName, props);\n  }\n}\n"]}