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@cloudsnorkel/cdk-github-runners

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CDK construct to create GitHub Actions self-hosted runners. Creates ephemeral runners on demand. Easy to deploy and highly customizable.

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"use strict"; var _a; Object.defineProperty(exports, "__esModule", { value: true }); exports.LambdaAccess = void 0; const JSII_RTTI_SYMBOL_1 = Symbol.for("jsii.rtti"); const child_process_1 = require("child_process"); const cdk = require("aws-cdk-lib"); 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"); /** * Access configuration options for Lambda functions like setup and webhook function. Use this to limit access to these functions. * * If you need a custom access point, you can implement this abstract class yourself. Note that the Lambda functions expect API Gateway v1 or v2 input. They also expect every URL under the constructed URL to point to the function. */ class LambdaAccess { /** * Disables access to the configured Lambda function. This is useful for the setup function after setup is done. */ static noAccess() { return new NoAccess(); } /** * Provide access using Lambda URL. This is the default and simplest option. It puts no limits on the requester, but the Lambda functions themselves authenticate every request. */ static lambdaUrl() { return new LambdaUrl(); } /** * Provide access using API Gateway. This is the most secure option, but requires additional configuration. It allows you to limit access to specific IP addresses and even to a specific VPC. * * To limit access to GitHub.com use: * * ``` * LambdaAccess.apiGateway({ * allowedIps: LambdaAccess.githubWebhookIps(), * }); * ``` * * Alternatively, get and manually update the list manually with: * * ``` * curl https://api.github.com/meta | jq .hooks * ``` */ static apiGateway(props) { return new ApiGateway(props); } /** * Downloads the list of IP addresses used by GitHub.com for webhooks. * * Note that downloading dynamic data during deployment is not recommended in CDK. This is a workaround for the lack of a better solution. */ static githubWebhookIps() { const githubMeta = (0, child_process_1.execFileSync)('curl', ['-fsSL', 'https://api.github.com/meta']).toString(); const githubMetaJson = JSON.parse(githubMeta); return githubMetaJson.hooks; } } exports.LambdaAccess = LambdaAccess; _a = JSII_RTTI_SYMBOL_1; LambdaAccess[_a] = { fqn: "@cloudsnorkel/cdk-github-runners.LambdaAccess", version: "0.14.11" }; /** * @internal */ class NoAccess extends LambdaAccess { bind(_construct, _id, _lambdaFunction) { return ''; } } /** * @internal */ class LambdaUrl extends LambdaAccess { bind(_construct, _id, lambdaFunction) { return lambdaFunction.addFunctionUrl({ authType: aws_lambda_1.FunctionUrlAuthType.NONE, }).url; } } /** * @internal */ class ApiGateway { constructor(props) { this.props = props; } bind(scope, id, lambdaFunction) { let policy; let endpointConfig = undefined; let vpcEndpoint = undefined; const region = cdk.Stack.of(scope).region; if (this.props?.allowedVpcEndpoints) { // private api gateway with existing vpc endpoints if (this.props?.allowedSecurityGroups) { cdk.Annotations.of(scope).addError('allowedSecurityGroups cannot be used when allowedVpcEndpoints is specified.'); } if (this.props?.allowedIps) { cdk.Annotations.of(scope).addError('allowedIps cannot be used when allowedVpcEndpoints is specified.'); } if (this.props?.allowedVpc) { cdk.Annotations.of(scope).addError('allowedVpc cannot be used when allowedVpcEndpoints is specified.'); } endpointConfig = { types: [aws_cdk_lib_1.aws_apigateway.EndpointType.PRIVATE], vpcEndpoints: this.props.allowedVpcEndpoints, }; policy = aws_iam_1.PolicyDocument.fromJson({ Version: '2012-10-17', Statement: [ { Effect: 'Allow', Principal: '*', Action: 'execute-api:Invoke', Resource: 'execute-api:/*/*/*', Condition: { StringEquals: { 'aws:SourceVpce': this.props.allowedVpcEndpoints.map(ve => ve.vpcEndpointId), }, }, }, ], }); vpcEndpoint = this.props.allowedVpcEndpoints[0]; } else if (this.props?.allowedVpc) { // private api gateway const sg = new aws_cdk_lib_1.aws_ec2.SecurityGroup(scope, `${id}/SG`, { vpc: this.props.allowedVpc, allowAllOutbound: true, }); for (const otherSg of this.props?.allowedSecurityGroups ?? []) { sg.connections.allowFrom(otherSg, aws_cdk_lib_1.aws_ec2.Port.tcp(443)); } for (const ip of this.props?.allowedIps ?? []) { try { sg.connections.allowFrom(aws_cdk_lib_1.aws_ec2.Peer.ipv4(ip), aws_cdk_lib_1.aws_ec2.Port.tcp(443)); } catch { // poor attempt at supporting both IPv4 and IPv6 // we can't accept ec2.IPeer because that doesn't work for public API Gateway sg.connections.allowFrom(aws_cdk_lib_1.aws_ec2.Peer.ipv6(ip), aws_cdk_lib_1.aws_ec2.Port.tcp(443)); } } vpcEndpoint = new aws_cdk_lib_1.aws_ec2.InterfaceVpcEndpoint(scope, `${id}/VpcEndpoint`, { vpc: this.props.allowedVpc, service: aws_cdk_lib_1.aws_ec2.InterfaceVpcEndpointAwsService.APIGATEWAY, privateDnsEnabled: false, securityGroups: [sg], open: false, }); endpointConfig = { types: [aws_cdk_lib_1.aws_apigateway.EndpointType.PRIVATE], vpcEndpoints: [vpcEndpoint], }; policy = aws_iam_1.PolicyDocument.fromJson({ Version: '2012-10-17', Statement: [ { Effect: 'Allow', Principal: '*', Action: 'execute-api:Invoke', Resource: 'execute-api:/*/*/*', Condition: { StringEquals: { 'aws:SourceVpce': vpcEndpoint.vpcEndpointId, }, }, }, ], }); } else { // public api gateway if (this.props?.allowedSecurityGroups) { cdk.Annotations.of(scope).addError('allowedSecurityGroups cannot be used when allowedVpc is not specified.'); } policy = aws_iam_1.PolicyDocument.fromJson({ Version: '2012-10-17', Statement: [ { Effect: 'Allow', Principal: '*', Action: 'execute-api:Invoke', Resource: 'execute-api:/*/*/*', Condition: { IpAddress: { 'aws:SourceIp': this.props?.allowedIps ?? ['0.0.0.0/0'], }, }, }, ], }); } const api = new aws_cdk_lib_1.aws_apigateway.LambdaRestApi(scope, id, { handler: lambdaFunction, proxy: true, cloudWatchRole: false, endpointConfiguration: endpointConfig, policy, }); // remove CfnOutput api.node.tryRemoveChild('Endpoint'); if (vpcEndpoint) { // enabling private DNS affects the entire VPC, so we use the Route53 alias instead // https://docs.aws.amazon.com/apigateway/latest/developerguide/apigateway-private-api-test-invoke-url.html return `https://${api.restApiId}-${vpcEndpoint.vpcEndpointId}.execute-api.${region}.amazonaws.com/${api.deploymentStage.stageName}`; } return api.url; } } //# 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{ execFileSync } from 'child_process';\nimport * as cdk from 'aws-cdk-lib';\nimport { aws_apigateway as apigateway, aws_ec2 as ec2, aws_iam as iam, aws_lambda as lambda } from 'aws-cdk-lib';\nimport { PolicyDocument } from 'aws-cdk-lib/aws-iam';\nimport { FunctionUrlAuthType } from 'aws-cdk-lib/aws-lambda';\nimport { Construct } from 'constructs';\n\n\nexport interface ApiGatewayAccessProps {\n  /**\n   * Create a private API Gateway and allow access from the specified VPC endpoints.\n   *\n   * Use this to make use of existing VPC endpoints or to share an endpoint between multiple functions. The VPC endpoint must point to `ec2.InterfaceVpcEndpointAwsService.APIGATEWAY`.\n   *\n   * No other settings are supported when using this option.\n   *\n   * All endpoints will be allowed access, but only the first one will be used as the URL by the runner system for setting up the webhook, and as setup URL.\n   */\n  readonly allowedVpcEndpoints?: ec2.IVpcEndpoint[];\n\n  /**\n   * List of IP addresses in CIDR notation that are allowed to access the API Gateway.\n   *\n   * If not specified on public API Gateway, all IP addresses are allowed.\n   *\n   * If not specified on private API Gateway, no IP addresses are allowed (but specified security groups are).\n   */\n  readonly allowedIps?: string[];\n\n  /**\n   * Create a private API Gateway and allow access from the specified VPC.\n   */\n  readonly allowedVpc?: ec2.IVpc;\n\n  /**\n   * List of security groups that are allowed to access the API Gateway.\n   *\n   * Only works for private API Gateways with {@link allowedVpc}.\n   */\n  readonly allowedSecurityGroups?: ec2.ISecurityGroup[];\n}\n\n/**\n * Access configuration options for Lambda functions like setup and webhook function. Use this to limit access to these functions.\n *\n * If you need a custom access point, you can implement this abstract class yourself. Note that the Lambda functions expect API Gateway v1 or v2 input. They also expect every URL under the constructed URL to point to the function.\n */\nexport abstract class LambdaAccess {\n  /**\n   * Disables access to the configured Lambda function. This is useful for the setup function after setup is done.\n   */\n  static noAccess(): LambdaAccess {\n    return new NoAccess();\n  }\n\n  /**\n   * Provide access using Lambda URL. This is the default and simplest option. It puts no limits on the requester, but the Lambda functions themselves authenticate every request.\n   */\n  static lambdaUrl(): LambdaAccess {\n    return new LambdaUrl();\n  }\n\n  /**\n   * Provide access using API Gateway. This is the most secure option, but requires additional configuration. It allows you to limit access to specific IP addresses and even to a specific VPC.\n   *\n   * To limit access to GitHub.com use:\n   *\n   * ```\n   * LambdaAccess.apiGateway({\n   *   allowedIps: LambdaAccess.githubWebhookIps(),\n   * });\n   * ```\n   *\n   * Alternatively, get and manually update the list manually with:\n   *\n   * ```\n   * curl https://api.github.com/meta | jq .hooks\n   * ```\n   */\n  static apiGateway(props?: ApiGatewayAccessProps): LambdaAccess {\n    return new ApiGateway(props);\n  }\n\n  /**\n   * Downloads the list of IP addresses used by GitHub.com for webhooks.\n   *\n   * Note that downloading dynamic data during deployment is not recommended in CDK. This is a workaround for the lack of a better solution.\n   */\n  static githubWebhookIps(): string[] {\n    const githubMeta = execFileSync('curl', ['-fsSL', 'https://api.github.com/meta']).toString();\n    const githubMetaJson = JSON.parse(githubMeta);\n    return githubMetaJson.hooks;\n  }\n\n  /**\n   * Creates all required resources and returns access URL or empty string if disabled.\n   *\n   * @return access URL or empty string if disabled\n   */\n  public abstract bind(scope: Construct, id: string, lambdaFunction: lambda.Function): string;\n}\n\n/**\n * @internal\n */\nclass NoAccess extends LambdaAccess {\n  public bind(_construct: Construct, _id: string, _lambdaFunction: lambda.Function): string {\n    return '';\n  }\n}\n\n/**\n * @internal\n */\nclass LambdaUrl extends LambdaAccess {\n  public bind(_construct: Construct, _id: string, lambdaFunction: lambda.Function): string {\n    return lambdaFunction.addFunctionUrl({\n      authType: FunctionUrlAuthType.NONE,\n    }).url;\n  }\n}\n\n/**\n * @internal\n */\nclass ApiGateway {\n  constructor(private readonly props?: ApiGatewayAccessProps) {}\n\n  public bind(scope: Construct, id: string, lambdaFunction: lambda.Function): string {\n    let policy: iam.PolicyDocument;\n    let endpointConfig: apigateway.EndpointConfiguration | undefined = undefined;\n    let vpcEndpoint: ec2.IVpcEndpoint | undefined = undefined;\n    const region = cdk.Stack.of(scope).region;\n\n    if (this.props?.allowedVpcEndpoints) {\n      // private api gateway with existing vpc endpoints\n      if (this.props?.allowedSecurityGroups) {\n        cdk.Annotations.of(scope).addError('allowedSecurityGroups cannot be used when allowedVpcEndpoints is specified.');\n      }\n      if (this.props?.allowedIps) {\n        cdk.Annotations.of(scope).addError('allowedIps cannot be used when allowedVpcEndpoints is specified.');\n      }\n      if (this.props?.allowedVpc) {\n        cdk.Annotations.of(scope).addError('allowedVpc cannot be used when allowedVpcEndpoints is specified.');\n      }\n\n      endpointConfig = {\n        types: [apigateway.EndpointType.PRIVATE],\n        vpcEndpoints: this.props.allowedVpcEndpoints,\n      };\n\n      policy = PolicyDocument.fromJson({\n        Version: '2012-10-17',\n        Statement: [\n          {\n            Effect: 'Allow',\n            Principal: '*',\n            Action: 'execute-api:Invoke',\n            Resource: 'execute-api:/*/*/*',\n            Condition: {\n              StringEquals: {\n                'aws:SourceVpce': this.props.allowedVpcEndpoints.map(ve => ve.vpcEndpointId),\n              },\n            },\n          },\n        ],\n      });\n\n      vpcEndpoint = this.props.allowedVpcEndpoints[0];\n    } else if (this.props?.allowedVpc) {\n      // private api gateway\n      const sg = new ec2.SecurityGroup(scope, `${id}/SG`, {\n        vpc: this.props.allowedVpc,\n        allowAllOutbound: true,\n      });\n\n      for (const otherSg of this.props?.allowedSecurityGroups ?? []) {\n        sg.connections.allowFrom(otherSg, ec2.Port.tcp(443));\n      }\n\n      for (const ip of this.props?.allowedIps ?? []) {\n        try {\n          sg.connections.allowFrom(ec2.Peer.ipv4(ip), ec2.Port.tcp(443));\n        } catch {\n          // poor attempt at supporting both IPv4 and IPv6\n          // we can't accept ec2.IPeer because that doesn't work for public API Gateway\n          sg.connections.allowFrom(ec2.Peer.ipv6(ip), ec2.Port.tcp(443));\n        }\n      }\n\n      vpcEndpoint = new ec2.InterfaceVpcEndpoint(scope, `${id}/VpcEndpoint`, {\n        vpc: this.props.allowedVpc,\n        service: ec2.InterfaceVpcEndpointAwsService.APIGATEWAY,\n        privateDnsEnabled: false,\n        securityGroups: [sg],\n        open: false,\n      });\n\n      endpointConfig = {\n        types: [apigateway.EndpointType.PRIVATE],\n        vpcEndpoints: [vpcEndpoint],\n      };\n\n      policy = PolicyDocument.fromJson({\n        Version: '2012-10-17',\n        Statement: [\n          {\n            Effect: 'Allow',\n            Principal: '*',\n            Action: 'execute-api:Invoke',\n            Resource: 'execute-api:/*/*/*',\n            Condition: {\n              StringEquals: {\n                'aws:SourceVpce': vpcEndpoint.vpcEndpointId,\n              },\n            },\n          },\n        ],\n      });\n    } else {\n      // public api gateway\n      if (this.props?.allowedSecurityGroups) {\n        cdk.Annotations.of(scope).addError('allowedSecurityGroups cannot be used when allowedVpc is not specified.');\n      }\n\n      policy = PolicyDocument.fromJson({\n        Version: '2012-10-17',\n        Statement: [\n          {\n            Effect: 'Allow',\n            Principal: '*',\n            Action: 'execute-api:Invoke',\n            Resource: 'execute-api:/*/*/*',\n            Condition: {\n              IpAddress: {\n                'aws:SourceIp': this.props?.allowedIps ?? ['0.0.0.0/0'],\n              },\n            },\n          },\n        ],\n      });\n    }\n\n    const api = new apigateway.LambdaRestApi(scope, id, {\n      handler: lambdaFunction,\n      proxy: true,\n      cloudWatchRole: false,\n      endpointConfiguration: endpointConfig,\n      policy,\n    });\n\n    // remove CfnOutput\n    api.node.tryRemoveChild('Endpoint');\n\n    if (vpcEndpoint) {\n      // enabling private DNS affects the entire VPC, so we use the Route53 alias instead\n      // https://docs.aws.amazon.com/apigateway/latest/developerguide/apigateway-private-api-test-invoke-url.html\n      return `https://${api.restApiId}-${vpcEndpoint.vpcEndpointId}.execute-api.${region}.amazonaws.com/${api.deploymentStage.stageName}`;\n    }\n\n    return api.url;\n  }\n}\n"]}