github.com/mweagle/Sparta@v1.15.0/docs/reference/decorators/application_load_balancer/index.html (about) 1 <!DOCTYPE html> 2 <html lang="en" class="js csstransforms3d"> 3 <head> 4 <meta charset="utf-8"> 5 <meta name="viewport" content="width=device-width, initial-scale=1.0"> 6 <meta name="generator" content="Hugo 0.69.2" /> 7 <meta name="description" content="Sparta - AWS Lambda Microservices"> 8 <meta name="author" content="Matt Weagle"> 9 10 <link rel="icon" href="/images/favicon.png" type="image/png"> 11 12 <title>Application Load Balancer :: Sparta - AWS Lambda Microservices</title> 13 14 15 <link href="/css/nucleus.css?1588464710" rel="stylesheet"> 16 <link href="/css/fontawesome-all.min.css?1588464710" rel="stylesheet"> 17 <link href="/css/hybrid.css?1588464710" rel="stylesheet"> 18 <link href="/css/featherlight.min.css?1588464710" rel="stylesheet"> 19 <link href="/css/perfect-scrollbar.min.css?1588464710" rel="stylesheet"> 20 <link href="/css/auto-complete.css?1588464710" 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fa-search"></i></label> 61 <input data-search-input id="search-by" type="search" placeholder="Search..."> 62 <span data-search-clear=""><i class="fas fa-times"></i></span> 63 </div> 64 65 <script type="text/javascript" src="/js/lunr.min.js?1588464710"></script> 66 <script type="text/javascript" src="/js/auto-complete.js?1588464710"></script> 67 <script type="text/javascript"> 68 69 var baseurl = "\/"; 70 71 </script> 72 <script type="text/javascript" src="/js/search.js?1588464710"></script> 73 74 75 </div> 76 77 <div class="highlightable"> 78 <ul class="topics"> 79 80 81 82 83 84 85 86 87 88 <li data-nav-id="/getting_started/" title="Getting Started" class="dd-item 89 90 91 92 "> 93 <a href="/getting_started/"> 94 Getting Started 95 96 </a> 97 98 99 </li> 100 101 102 103 104 105 106 107 108 109 110 <li data-nav-id="/example_service/" title="Example Service" class="dd-item 111 112 113 114 "> 115 <a href="/example_service/"> 116 Example Service 117 118 </a> 119 120 121 <ul> 122 123 124 125 126 127 128 129 130 131 132 133 134 135 <li data-nav-id="/example_service/step1/" title="Overview" class="dd-item "> 136 <a href="/example_service/step1/"> 137 Overview 138 139 </a> 140 </li> 141 142 143 144 145 146 147 148 149 150 151 152 153 154 <li data-nav-id="/example_service/step2/" title="Details" class="dd-item "> 155 <a href="/example_service/step2/"> 156 Details 157 158 </a> 159 </li> 160 161 162 163 164 165 166 167 </ul> 168 169 </li> 170 171 172 173 174 175 176 177 178 179 180 <li data-nav-id="/concepts/" title="Concepts" class="dd-item 181 182 183 184 "> 185 <a href="/concepts/"> 186 Concepts 187 188 </a> 189 190 191 </li> 192 193 194 195 196 197 198 199 200 201 202 <li data-nav-id="/reference/" title="Reference" class="dd-item 203 parent 204 205 206 "> 207 <a href="/reference/"> 208 Reference 209 210 </a> 211 212 213 <ul> 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 <li data-nav-id="/reference/apigateway/" title="" class="dd-item 230 231 232 233 "> 234 <a href="/reference/apigateway/"> 235 <b>API Gateway</b> 236 237 </a> 238 239 240 <ul> 241 242 243 244 245 246 247 248 249 250 251 252 253 254 <li data-nav-id="/reference/apigateway/echo_event/" title="Echo" class="dd-item "> 255 <a href="/reference/apigateway/echo_event/"> 256 Echo 257 258 </a> 259 </li> 260 261 262 263 264 265 266 267 268 269 270 271 272 273 <li data-nav-id="/reference/apigateway/request_params/" title="Request Parameters" class="dd-item "> 274 <a href="/reference/apigateway/request_params/"> 275 Request Parameters 276 277 </a> 278 </li> 279 280 281 282 283 284 285 286 287 288 289 290 291 292 <li data-nav-id="/reference/apigateway/context/" title="Request Context" class="dd-item "> 293 <a href="/reference/apigateway/context/"> 294 Request Context 295 296 </a> 297 </li> 298 299 300 301 302 303 304 305 306 307 308 309 310 311 <li data-nav-id="/reference/apigateway/cors/" title="CORS" class="dd-item "> 312 <a href="/reference/apigateway/cors/"> 313 CORS 314 315 </a> 316 </li> 317 318 319 320 321 322 323 324 325 326 327 328 329 330 <li data-nav-id="/reference/apigateway/slack/" title="Slack SlashCommand" class="dd-item "> 331 <a href="/reference/apigateway/slack/"> 332 Slack SlashCommand 333 334 </a> 335 </li> 336 337 338 339 340 341 342 343 344 345 346 347 348 349 <li data-nav-id="/reference/apigateway/s3site/" title="S3 Sites with CORS" class="dd-item "> 350 <a href="/reference/apigateway/s3site/"> 351 S3 Sites with CORS 352 353 </a> 354 </li> 355 356 357 358 359 360 361 362 </ul> 363 364 </li> 365 366 367 368 369 370 371 372 373 374 375 376 377 <li data-nav-id="/reference/apiv2gateway/" title="" class="dd-item 378 379 380 381 "> 382 <a href="/reference/apiv2gateway/"> 383 <b>API V2 Gateway</b> 384 385 </a> 386 387 388 </li> 389 390 391 392 393 394 395 396 397 398 399 400 401 <li data-nav-id="/reference/eventsources/" title="" class="dd-item 402 403 404 405 "> 406 <a href="/reference/eventsources/"> 407 <b>Event Sources</b> 408 409 </a> 410 411 412 <ul> 413 414 415 416 417 418 419 420 421 422 423 424 425 426 <li data-nav-id="/reference/eventsources/codecommit/" title="CodeCommit" class="dd-item "> 427 <a href="/reference/eventsources/codecommit/"> 428 CodeCommit 429 430 </a> 431 </li> 432 433 434 435 436 437 438 439 440 441 442 443 444 445 <li data-nav-id="/reference/eventsources/cloudformation/" title="CloudFormation" class="dd-item "> 446 <a href="/reference/eventsources/cloudformation/"> 447 CloudFormation 448 449 </a> 450 </li> 451 452 453 454 455 456 457 458 459 460 461 462 463 464 <li data-nav-id="/reference/eventsources/cloudwatchevents/" title="CloudWatch Events" class="dd-item "> 465 <a href="/reference/eventsources/cloudwatchevents/"> 466 CloudWatch Events 467 468 </a> 469 </li> 470 471 472 473 474 475 476 477 478 479 480 481 482 483 <li data-nav-id="/reference/eventsources/cloudwatchlogs/" title="CloudWatch Logs" class="dd-item "> 484 <a href="/reference/eventsources/cloudwatchlogs/"> 485 CloudWatch Logs 486 487 </a> 488 </li> 489 490 491 492 493 494 495 496 497 498 499 500 501 502 <li data-nav-id="/reference/eventsources/cognito/" title="Cognito" class="dd-item "> 503 <a href="/reference/eventsources/cognito/"> 504 Cognito 505 506 </a> 507 </li> 508 509 510 511 512 513 514 515 516 517 518 519 520 521 <li data-nav-id="/reference/eventsources/dynamodb/" title="DynamoDB" class="dd-item "> 522 <a href="/reference/eventsources/dynamodb/"> 523 DynamoDB 524 525 </a> 526 </li> 527 528 529 530 531 532 533 534 535 536 537 538 539 540 <li data-nav-id="/reference/eventsources/kinesis/" title="Kinesis" class="dd-item "> 541 <a href="/reference/eventsources/kinesis/"> 542 Kinesis 543 544 </a> 545 </li> 546 547 548 549 550 551 552 553 554 555 556 557 558 559 <li data-nav-id="/reference/eventsources/s3/" title="S3" class="dd-item "> 560 <a href="/reference/eventsources/s3/"> 561 S3 562 563 </a> 564 </li> 565 566 567 568 569 570 571 572 573 574 575 576 577 578 <li data-nav-id="/reference/eventsources/ses/" title="SES" class="dd-item "> 579 <a href="/reference/eventsources/ses/"> 580 SES 581 582 </a> 583 </li> 584 585 586 587 588 589 590 591 592 593 594 595 596 597 <li data-nav-id="/reference/eventsources/sns/" title="SNS" class="dd-item "> 598 <a href="/reference/eventsources/sns/"> 599 SNS 600 601 </a> 602 </li> 603 604 605 606 607 608 609 610 611 612 613 614 615 616 <li data-nav-id="/reference/eventsources/sqs/" title="SQS" class="dd-item "> 617 <a href="/reference/eventsources/sqs/"> 618 SQS 619 620 </a> 621 </li> 622 623 624 625 626 627 628 629 </ul> 630 631 </li> 632 633 634 635 636 637 638 639 640 641 642 643 644 <li data-nav-id="/reference/archetypes/" title="" class="dd-item 645 646 647 648 "> 649 <a href="/reference/archetypes/"> 650 <b>Archetype Constructors</b> 651 652 </a> 653 654 655 <ul> 656 657 658 659 660 661 662 663 664 665 666 667 668 669 <li data-nav-id="/reference/archetypes/event_bridge/" title="Event Bridge" class="dd-item "> 670 <a href="/reference/archetypes/event_bridge/"> 671 Event Bridge 672 673 </a> 674 </li> 675 676 677 678 679 680 681 682 683 684 685 686 687 688 <li data-nav-id="/reference/archetypes/codecommit/" title="CodeCommit" class="dd-item "> 689 <a href="/reference/archetypes/codecommit/"> 690 CodeCommit 691 692 </a> 693 </li> 694 695 696 697 698 699 700 701 702 703 704 705 706 707 <li data-nav-id="/reference/archetypes/cloudwatch/" title="CloudWatch" class="dd-item "> 708 <a href="/reference/archetypes/cloudwatch/"> 709 CloudWatch 710 711 </a> 712 </li> 713 714 715 716 717 718 719 720 721 722 723 724 725 726 <li data-nav-id="/reference/archetypes/dynamodb/" title="DynamoDB" class="dd-item "> 727 <a href="/reference/archetypes/dynamodb/"> 728 DynamoDB 729 730 </a> 731 </li> 732 733 734 735 736 737 738 739 740 741 742 743 744 745 <li data-nav-id="/reference/archetypes/kinesis/" title="Kinesis" class="dd-item "> 746 <a href="/reference/archetypes/kinesis/"> 747 Kinesis 748 749 </a> 750 </li> 751 752 753 754 755 756 757 758 759 760 761 762 763 764 <li data-nav-id="/reference/archetypes/kinesis_firehose/" title="Kinesis Firehose" class="dd-item "> 765 <a href="/reference/archetypes/kinesis_firehose/"> 766 Kinesis Firehose 767 768 </a> 769 </li> 770 771 772 773 774 775 776 777 778 779 780 781 782 783 <li data-nav-id="/reference/archetypes/rest/" title="REST Service" class="dd-item "> 784 <a href="/reference/archetypes/rest/"> 785 REST Service 786 787 </a> 788 </li> 789 790 791 792 793 794 795 796 797 798 799 800 801 802 <li data-nav-id="/reference/archetypes/s3/" title="S3" class="dd-item "> 803 <a href="/reference/archetypes/s3/"> 804 S3 805 806 </a> 807 </li> 808 809 810 811 812 813 814 815 816 817 818 819 820 821 <li data-nav-id="/reference/archetypes/sns/" title="SNS" class="dd-item "> 822 <a href="/reference/archetypes/sns/"> 823 SNS 824 825 </a> 826 </li> 827 828 829 830 831 832 833 834 </ul> 835 836 </li> 837 838 839 840 841 842 843 844 845 846 847 848 849 <li data-nav-id="/reference/decorators/" title="" class="dd-item 850 parent 851 852 853 "> 854 <a href="/reference/decorators/"> 855 <b>Build-Time Decorators</b> 856 857 </a> 858 859 860 <ul> 861 862 863 864 865 866 867 868 869 870 871 872 873 874 <li data-nav-id="/reference/decorators/application_load_balancer/" title="Application Load Balancer" class="dd-item active"> 875 <a href="/reference/decorators/application_load_balancer/"> 876 Application Load Balancer 877 878 </a> 879 </li> 880 881 882 883 884 885 886 887 888 889 890 891 892 893 <li data-nav-id="/reference/decorators/cloudmap/" title="CloudMap Service Discovery" class="dd-item "> 894 <a href="/reference/decorators/cloudmap/"> 895 CloudMap Service Discovery 896 897 </a> 898 </li> 899 900 901 902 903 904 905 906 907 908 909 910 911 912 <li data-nav-id="/reference/decorators/cloudfront_distribution/" title="CloudFront Distribution" class="dd-item "> 913 <a href="/reference/decorators/cloudfront_distribution/"> 914 CloudFront Distribution 915 916 </a> 917 </li> 918 919 920 921 922 923 924 925 926 927 928 929 930 931 <li data-nav-id="/reference/decorators/lambda_versioning/" title="Lambda Versioning Decorator" class="dd-item "> 932 <a href="/reference/decorators/lambda_versioning/"> 933 Lambda Versioning Decorator 934 935 </a> 936 </li> 937 938 939 940 941 942 943 944 945 946 947 948 949 950 <li data-nav-id="/reference/decorators/publish_outputs/" title="Publishing Outputs" class="dd-item "> 951 <a href="/reference/decorators/publish_outputs/"> 952 Publishing Outputs 953 954 </a> 955 </li> 956 957 958 959 960 961 962 963 964 965 966 967 968 969 <li data-nav-id="/reference/decorators/s3_artifact_publisher/" title="S3 Artifact Publisher" class="dd-item "> 970 <a href="/reference/decorators/s3_artifact_publisher/"> 971 S3 Artifact Publisher 972 973 </a> 974 </li> 975 976 977 978 979 980 981 982 983 984 985 986 987 988 <li data-nav-id="/reference/decorators/dynamic_infrastructure/" title="Dynamic Infrastructure" class="dd-item "> 989 <a href="/reference/decorators/dynamic_infrastructure/"> 990 Dynamic Infrastructure 991 992 </a> 993 </li> 994 995 996 997 998 999 1000 1001 </ul> 1002 1003 </li> 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 <li data-nav-id="/reference/interceptors/" title="" class="dd-item 1017 1018 1019 1020 "> 1021 <a href="/reference/interceptors/"> 1022 <b>Runtime Interceptors</b> 1023 1024 </a> 1025 1026 1027 <ul> 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 <li data-nav-id="/reference/interceptors/xray_interceptor/" title="XRayInterceptor" class="dd-item "> 1042 <a href="/reference/interceptors/xray_interceptor/"> 1043 XRayInterceptor 1044 1045 </a> 1046 </li> 1047 1048 1049 1050 1051 1052 1053 1054 </ul> 1055 1056 </li> 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 <li data-nav-id="/reference/cli_options/" title="" class="dd-item 1070 1071 1072 1073 "> 1074 <a href="/reference/cli_options/"> 1075 <b>Command Line Options</b> 1076 1077 </a> 1078 1079 1080 </li> 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 <li data-nav-id="/reference/application/" title="" class="dd-item 1094 1095 1096 1097 "> 1098 <a href="/reference/application/"> 1099 <b>Application Customization</b> 1100 1101 </a> 1102 1103 1104 <ul> 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 <li data-nav-id="/reference/application/custom_commands/" title="Custom Commands" class="dd-item "> 1119 <a href="/reference/application/custom_commands/"> 1120 Custom Commands 1121 1122 </a> 1123 </li> 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 <li data-nav-id="/reference/application/custom_flags/" title="Custom Flags" class="dd-item "> 1138 <a href="/reference/application/custom_flags/"> 1139 Custom Flags 1140 1141 </a> 1142 </li> 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 <li data-nav-id="/reference/application/environments/" title="Managing Environments" class="dd-item "> 1157 <a href="/reference/application/environments/"> 1158 Managing Environments 1159 1160 </a> 1161 </li> 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 <li data-nav-id="/reference/application/custom_lambda_resources/" title="CloudFormation Resources" class="dd-item "> 1176 <a href="/reference/application/custom_lambda_resources/"> 1177 CloudFormation Resources 1178 1179 </a> 1180 </li> 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 <li data-nav-id="/reference/application/custom_resources/" title="Custom Resources" class="dd-item "> 1195 <a href="/reference/application/custom_resources/"> 1196 Custom Resources 1197 1198 </a> 1199 </li> 1200 1201 1202 1203 1204 1205 1206 1207 </ul> 1208 1209 </li> 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 <li data-nav-id="/reference/step/" title="" class="dd-item 1223 1224 1225 1226 "> 1227 <a href="/reference/step/"> 1228 <b>Step Functions</b> 1229 1230 </a> 1231 1232 1233 <ul> 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 <li data-nav-id="/reference/step/lambda/" title="Lambda" class="dd-item "> 1250 <a href="/reference/step/lambda/"> 1251 Lambda 1252 1253 </a> 1254 </li> 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 <li data-nav-id="/reference/step/fargate/" title="Fargate" class="dd-item "> 1269 <a href="/reference/step/fargate/"> 1270 Fargate 1271 1272 </a> 1273 </li> 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 <li data-nav-id="/reference/step/services/" title="" class="dd-item 1288 1289 1290 1291 "> 1292 <a href="/reference/step/services/"> 1293 <b>Service Integrations</b> 1294 1295 </a> 1296 1297 1298 <ul> 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 <li data-nav-id="/reference/step/services/dynamodb/" title="Amazon DynamoDb" class="dd-item "> 1313 <a href="/reference/step/services/dynamodb/"> 1314 Amazon DynamoDb 1315 1316 </a> 1317 </li> 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 <li data-nav-id="/reference/step/services/sagemaker/" title="Amazon SageMaker" class="dd-item "> 1332 <a href="/reference/step/services/sagemaker/"> 1333 Amazon SageMaker 1334 1335 </a> 1336 </li> 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 <li data-nav-id="/reference/step/services/sns/" title="Amazon SNS" class="dd-item "> 1351 <a href="/reference/step/services/sns/"> 1352 Amazon SNS 1353 1354 </a> 1355 </li> 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 <li data-nav-id="/reference/step/services/sqs/" title="Amazon SQS" class="dd-item "> 1370 <a href="/reference/step/services/sqs/"> 1371 Amazon SQS 1372 1373 </a> 1374 </li> 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 <li data-nav-id="/reference/step/services/batch/" title="AWS Batch" class="dd-item "> 1389 <a href="/reference/step/services/batch/"> 1390 AWS Batch 1391 1392 </a> 1393 </li> 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 <li data-nav-id="/reference/step/services/fargate/" title="AWS Fargate" class="dd-item "> 1408 <a href="/reference/step/services/fargate/"> 1409 AWS Fargate 1410 1411 </a> 1412 </li> 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 <li data-nav-id="/reference/step/services/glue/" title="AWS Glue" class="dd-item "> 1427 <a href="/reference/step/services/glue/"> 1428 AWS Glue 1429 1430 </a> 1431 </li> 1432 1433 1434 1435 1436 1437 1438 1439 </ul> 1440 1441 </li> 1442 1443 1444 1445 1446 1447 1448 </ul> 1449 1450 </li> 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 <li data-nav-id="/reference/discovery/" title="Discovery Service" class="dd-item "> 1464 <a href="/reference/discovery/"> 1465 Discovery Service 1466 1467 </a> 1468 </li> 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 <li data-nav-id="/reference/docker/" title="Docker" class="dd-item "> 1483 <a href="/reference/docker/"> 1484 Docker 1485 1486 </a> 1487 </li> 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 <li data-nav-id="/reference/hybrid_topologies/" title="Hybrid Topologies" class="dd-item "> 1502 <a href="/reference/hybrid_topologies/"> 1503 Hybrid Topologies 1504 1505 </a> 1506 </li> 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 <li data-nav-id="/reference/operations/" title="" class="dd-item 1521 1522 1523 1524 "> 1525 <a href="/reference/operations/"> 1526 <b>Operations</b> 1527 1528 </a> 1529 1530 1531 <ul> 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 <li data-nav-id="/reference/operations/magefile/" title="Magefiles" class="dd-item "> 1546 <a href="/reference/operations/magefile/"> 1547 Magefiles 1548 1549 </a> 1550 </li> 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 <li data-nav-id="/reference/operations/cloudwatch_alarms/" title="CloudWatch Alarms" class="dd-item "> 1565 <a href="/reference/operations/cloudwatch_alarms/"> 1566 CloudWatch Alarms 1567 1568 </a> 1569 </li> 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 <li data-nav-id="/reference/operations/cloudwatch_dashboard/" title="CloudWatch Dashboard" class="dd-item "> 1584 <a href="/reference/operations/cloudwatch_dashboard/"> 1585 CloudWatch Dashboard 1586 1587 </a> 1588 </li> 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 <li data-nav-id="/reference/operations/codedeploy_service_update/" title="CodeDeploy Service Update" class="dd-item "> 1603 <a href="/reference/operations/codedeploy_service_update/"> 1604 CodeDeploy Service Update 1605 1606 </a> 1607 </li> 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 <li data-nav-id="/reference/operations/cicd/" title="CI/CD" class="dd-item "> 1622 <a href="/reference/operations/cicd/"> 1623 CI/CD 1624 1625 </a> 1626 </li> 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 <li data-nav-id="/reference/operations/deployment_strategies/" title="Deployment Strategies" class="dd-item "> 1641 <a href="/reference/operations/deployment_strategies/"> 1642 Deployment Strategies 1643 1644 </a> 1645 </li> 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 <li data-nav-id="/reference/operations/metrics_publisher/" title="Metrics Publisher" class="dd-item "> 1660 <a href="/reference/operations/metrics_publisher/"> 1661 Metrics Publisher 1662 1663 </a> 1664 </li> 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 <li data-nav-id="/reference/operations/profiling/" title="Profiling" class="dd-item "> 1679 <a href="/reference/operations/profiling/"> 1680 Profiling 1681 1682 </a> 1683 </li> 1684 1685 1686 1687 1688 1689 1690 1691 </ul> 1692 1693 </li> 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 <li data-nav-id="/reference/testing/" title="Testing" class="dd-item "> 1707 <a href="/reference/testing/"> 1708 Testing 1709 1710 </a> 1711 </li> 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 <li data-nav-id="/reference/supporting_packages/" title="Supporting Packages" class="dd-item "> 1726 <a href="/reference/supporting_packages/"> 1727 Supporting Packages 1728 1729 </a> 1730 </li> 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 <li data-nav-id="/reference/limitations/" title="Limitations" class="dd-item "> 1745 <a href="/reference/limitations/"> 1746 Limitations 1747 1748 </a> 1749 </li> 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 <li data-nav-id="/reference/faq/" title="FAQ" class="dd-item "> 1764 <a href="/reference/faq/"> 1765 FAQ 1766 1767 </a> 1768 </li> 1769 1770 1771 1772 1773 1774 1775 1776 </ul> 1777 1778 </li> 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 <li data-nav-id="/presentations/" title="Presentations" class="dd-item 1790 1791 1792 1793 "> 1794 <a href="/presentations/"> 1795 Presentations 1796 1797 </a> 1798 1799 1800 </li> 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 <li data-nav-id="/meta/" title="Meta" class="dd-item 1812 1813 1814 1815 "> 1816 <a href="/meta/"> 1817 Meta 1818 1819 </a> 1820 1821 1822 </li> 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 <li data-nav-id="/credits/" title="Credits" class="dd-item 1834 1835 1836 1837 "> 1838 <a href="/credits/"> 1839 Credits 1840 1841 </a> 1842 1843 1844 </li> 1845 1846 1847 1848 1849 1850 </ul> 1851 1852 1853 1854 <section id="shortcuts"> 1855 <h3>More</h3> 1856 <ul> 1857 1858 <li> 1859 <a class="padding" href="https://github.com/mweagle/Sparta"><i class='fab fa-fw fa-github'></i> Github repo</a> 1860 </li> 1861 1862 <li> 1863 <a class="padding" href="https://github.com/mweagle?utf8=%E2%9C%93&tab=repositories&q=Sparta&type=&language="><i class='fas fa-fw fa-camera'></i> Showcases</a> 1864 </li> 1865 1866 <li> 1867 <a class="padding" 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class="fas fa-code-branch"></i> 1904 <span id="top-github-link-text">Edit this page</span> 1905 </a> 1906 </div> 1907 1908 1909 1910 <div id="breadcrumbs" itemscope="" itemtype="http://data-vocabulary.org/Breadcrumb"> 1911 <span id="sidebar-toggle-span"> 1912 <a href="#" id="sidebar-toggle" data-sidebar-toggle=""> 1913 <i class="fas fa-bars"></i> 1914 </a> 1915 </span> 1916 1917 <span id="toc-menu"><i class="fas fa-list-alt"></i></span> 1918 1919 <span class="links"> 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 <a href='/'></a> > <a href='/reference/'>Reference</a> > <a href='/reference/decorators/'></a> > Application Load Balancer 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 </span> 1948 </div> 1949 1950 <div class="progress"> 1951 <div class="wrapper"> 1952 <nav id="TableOfContents"> 1953 <ul> 1954 <li><a href="#lambda-function">Lambda Function</a></li> 1955 <li><a href="#definition">Definition</a></li> 1956 <li><a href="#conditional-targets">Conditional Targets</a></li> 1957 <li><a href="#additional-resources">Additional Resources</a></li> 1958 <li><a href="#workflow-hooks">Workflow Hooks</a></li> 1959 <li><a href="#output">Output</a></li> 1960 <li><a href="#testing">Testing</a></li> 1961 </ul> 1962 </nav> 1963 </div> 1964 </div> 1965 1966 1967 </div> 1968 </div> 1969 1970 <div id="head-tags"> 1971 1972 </div> 1973 1974 <div id="body-inner"> 1975 1976 <h1> 1977 1978 Application Load Balancer 1979 </h1> 1980 1981 1982 1983 1984 1985 1986 <p>The <a href="https://godoc.org/github.com/mweagle/Sparta/decorator#ApplicationLoadBalancerDecorator">ApplicationLoadBalancerDecorator</a> allows you to expose lambda functions as <a href="https://docs.aws.amazon.com/elasticloadbalancing/latest/application/lambda-functions.html">Application Load Balancer targets</a>.</p> 1987 <p>This can be useful to provide HTTP(S) access to one or more Lambda functions without requiring an API-Gateway service.</p> 1988 <h2 id="lambda-function">Lambda Function</h2> 1989 <p>Application Load Balancer (ALB) lambda targets must satisfy a prescribed Lambda signature:</p> 1990 <div class="highlight"><pre style="background-color:#fff;-moz-tab-size:2;-o-tab-size:2;tab-size:2"><code class="language-go" data-lang="go"><span style="color:#00f">import</span> ( 1991 awsEvents <span style="color:#a31515">"github.com/aws/aws-lambda-go/events"</span> 1992 ) 1993 1994 <span style="color:#00f">func</span>(context.Context, awsEvents.ALBTargetGroupRequest) awsEvents.ALBTargetGroupResponse 1995 </code></pre></div><p>See the <a href="https://godoc.org/github.com/aws/aws-lambda-go/events#ALBTargetGroupRequest">ALBTargetGroupRequest</a> and <a href="https://godoc.org/github.com/aws/aws-lambda-go/events#ALBTargetGroupResponse">ALBTargetGroupResponse</a> <em>godoc</em> entries for more information.</p> 1996 <p>An example ALB-eligible target function might look like:</p> 1997 <div class="highlight"><pre style="background-color:#fff;-moz-tab-size:2;-o-tab-size:2;tab-size:2"><code class="language-go" data-lang="go"><span style="color:#008000">// ALB eligible lambda function 1998 </span><span style="color:#008000"></span><span style="color:#00f">func</span> helloNewWorld(ctx context.Context, 1999 albEvent awsEvents.ALBTargetGroupRequest) (awsEvents.ALBTargetGroupResponse, <span style="color:#2b91af">error</span>) { 2000 2001 <span style="color:#00f">return</span> awsEvents.ALBTargetGroupResponse{ 2002 StatusCode: 200, 2003 StatusDescription: fmt.Sprintf(<span style="color:#a31515">"200 OK"</span>), 2004 Body: <span style="color:#a31515">"Some other handler"</span>, 2005 IsBase64Encoded: <span style="color:#00f">false</span>, 2006 Headers: <span style="color:#00f">map</span>[<span style="color:#2b91af">string</span>]<span style="color:#2b91af">string</span>{}, 2007 }, <span style="color:#00f">nil</span> 2008 } 2009 </code></pre></div><p>Once you’ve defined your ALB-compatible functions, the next step is to register them with the decorator responsible for configuring them as ALB listener targets.</p> 2010 <h2 id="definition">Definition</h2> 2011 <p>The <code>ApplicationLoadBalancerDecorator</code> satisfies the <a href="https://godoc.org/github.com/mweagle/Sparta#ServiceDecoratorHookHandler">ServiceDecoratorHookHandler</a> interface and adds a set of CloudFormation Resources to support properly publishing your Lambda functions.</p> 2012 <p>Since this access path requires an Application Load Balancer, the first step is to define the SecurityGroup associated with the ALB so that incoming requests can be accepted.</p> 2013 <p>The following definition will create an Security Group that accepts public traffic on port <code>80</code>:</p> 2014 <div class="highlight"><pre style="background-color:#fff;-moz-tab-size:2;-o-tab-size:2;tab-size:2"><code class="language-go" data-lang="go"> sgResName := sparta.CloudFormationResourceName(<span style="color:#a31515">"ALBSecurityGroup"</span>, <span style="color:#a31515">"ALBSecurityGroup"</span>) 2015 sgRes := &gocf.EC2SecurityGroup{ 2016 GroupDescription: gocf.String(<span style="color:#a31515">"ALB Security Group"</span>), 2017 SecurityGroupIngress: &gocf.EC2SecurityGroupIngressPropertyList{ 2018 gocf.EC2SecurityGroupIngressProperty{ 2019 IPProtocol: gocf.String(<span style="color:#a31515">"tcp"</span>), 2020 FromPort: gocf.Integer(80), 2021 ToPort: gocf.Integer(80), 2022 CidrIP: gocf.String(<span style="color:#a31515">"0.0.0.0/0"</span>), 2023 }, 2024 }, 2025 } 2026 </code></pre></div><p>The subnets for our Application Load Balancer are supplied as an environment variable (<strong>TEST_SUBNETS</strong>) of the form <code>id1,id2</code>:</p> 2027 <div class="highlight"><pre style="background-color:#fff;-moz-tab-size:2;-o-tab-size:2;tab-size:2"><code class="language-go" data-lang="go"> subnetList := strings.Split(os.Getenv(<span style="color:#a31515">"TEST_SUBNETS"</span>), <span style="color:#a31515">","</span>) 2028 subnetIDs := make([]gocf.Stringable, len(subnetList)) 2029 <span style="color:#00f">for</span> eachIndex, eachSubnet := <span style="color:#00f">range</span> subnetList { 2030 subnetIDs[eachIndex] = gocf.String(eachSubnet) 2031 } 2032 </code></pre></div><p>The next step is to define the ALB and associate it with both the account Subnets and SecurityGroup we just defined:</p> 2033 <div class="highlight"><pre style="background-color:#fff;-moz-tab-size:2;-o-tab-size:2;tab-size:2"><code class="language-go" data-lang="go"> alb := &gocf.ElasticLoadBalancingV2LoadBalancer{ 2034 Subnets: gocf.StringList(subnetIDs...), 2035 SecurityGroups: gocf.StringList(gocf.GetAtt(sgResName, <span style="color:#a31515">"GroupId"</span>)), 2036 } 2037 </code></pre></div><p>This <code>ElasticLoadBalancingV2LoadBalancer</code> instance is provided to <code>NewApplicationLoadBalancerDecorator</code> to create the decorator that will annotate the CloudFormation 2038 template with the required resources.</p> 2039 <div class="highlight"><pre style="background-color:#fff;-moz-tab-size:2;-o-tab-size:2;tab-size:2"><code class="language-go" data-lang="go">albDecorator, albDecoratorErr := spartaDecorators.NewApplicationLoadBalancerDecorator(alb, 2040 80, 2041 <span style="color:#a31515">"HTTP"</span>, 2042 lambdaFn) 2043 </code></pre></div><p>The <code>NewApplicationLoadBalancerDecorator</code> accepts four arguments:</p> 2044 <ul> 2045 <li>The <code>ElasticLoadBalancingV2LoadBalancer</code> that handles this service’s incoming requests</li> 2046 <li>The port (<code>80</code>) that incoming requests will be accepted</li> 2047 <li>The protocol (<code>HTTP</code>) for incoming requests</li> 2048 <li>The default <em>*sparta.LambdaAWSInfo</em> instance (<code>lambdaFn</code>) to use as the ALB’s <a href="https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-elasticloadbalancingv2-listener.html#cfn-elasticloadbalancingv2-listener-defaultactions">DefaultAction</a> handler in case no other conditional target matches the incoming request.</li> 2049 </ul> 2050 <h2 id="conditional-targets">Conditional Targets</h2> 2051 <p>Services may expose more than one Lambda function on that same port using multiple <a href="https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-elasticloadbalancingv2-listenerrule.html">ListenerRule</a> entries.</p> 2052 <p>For instance, to register a second lambda function <code>lambdaFn2</code> with the same Application Load Balancer at the <em>/newhello</em> path, add a <code>ConditionalEntry</code> as in:</p> 2053 <div class="highlight"><pre style="background-color:#fff;-moz-tab-size:2;-o-tab-size:2;tab-size:2"><code class="language-go" data-lang="go"> albDecorator.AddConditionalEntry(gocf.ElasticLoadBalancingV2ListenerRuleRuleCondition{ 2054 Field: gocf.String(<span style="color:#a31515">"path-pattern"</span>), 2055 PathPatternConfig: &gocf.ElasticLoadBalancingV2ListenerRulePathPatternConfig{ 2056 Values: gocf.StringList(gocf.String(<span style="color:#a31515">"/newhello*"</span>)), 2057 }, 2058 }, lambdaFn2) 2059 </code></pre></div><p>This will create a rule that associates the _/newhello*_ path with <code>lambdaFn2</code>. Requests that do not match the incoming path will fallback to the default handler (<code>lambdaFn</code>). 2060 See the <a href="https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-elasticloadbalancingv2-listenerrule-conditions.html">RuleCondition</a> documentation 2061 for the full set of conditions that can be expressed.</p> 2062 <h2 id="additional-resources">Additional Resources</h2> 2063 <p>The next step is to ensure that the Security Group that we associated with our ALB is included in the final template. This is done by including it in the <code>ApplicationLoadBalancerDecorator.Resources</code> map which allows you to provide additional CloudFormation resources that should be included in the final template:</p> 2064 <div class="highlight"><pre style="background-color:#fff;-moz-tab-size:2;-o-tab-size:2;tab-size:2"><code class="language-go" data-lang="go"><span style="color:#008000">// Finally, tell the ALB decorator we have some additional resources that need to be 2065 </span><span style="color:#008000">// included in the CloudFormation template 2066 </span><span style="color:#008000"></span>albDecorator.Resources[sgResName] = sgRes 2067 </code></pre></div><h2 id="workflow-hooks">Workflow Hooks</h2> 2068 <p>With the decorator fully configured, the final step is to provide it as part of the WorkflowHooks struct:</p> 2069 <div class="highlight"><pre style="background-color:#fff;-moz-tab-size:2;-o-tab-size:2;tab-size:2"><code class="language-go" data-lang="go"> <span style="color:#008000">// Supply it to the WorkflowHooks and get going... 2070 </span><span style="color:#008000"></span> workflowHooks := &sparta.WorkflowHooks{ 2071 ServiceDecorators: []sparta.ServiceDecoratorHookHandler{ 2072 albDecorator, 2073 }, 2074 } 2075 2076 err := sparta.MainEx(awsName, 2077 <span style="color:#a31515">"Simple Sparta application that demonstrates how to make Lambda functions an ALB Target"</span>, 2078 lambdaFunctions, 2079 <span style="color:#00f">nil</span>, 2080 <span style="color:#00f">nil</span>, 2081 workflowHooks, 2082 <span style="color:#00f">false</span>) 2083 </code></pre></div><h2 id="output">Output</h2> 2084 <p>As part of the provisioning workflow, the <code>ApplicationLoadBalancerDecorator</code> will include the Application Load Balancer discovery information in the Outputs section as in:</p> 2085 <div class="highlight"><pre style="background-color:#fff;-moz-tab-size:2;-o-tab-size:2;tab-size:2"><code class="language-plain" data-lang="plain">INFO[0056] Stack Outputs ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ 2086 INFO[0056] ApplicationLoadBalancerDNS80 Description="ALB DNSName (port: 80, protocol: HTTP)" Value=MyALB-ELBv2-44R3J0MV1D37-943334334.us-west-2.elb.amazonaws.com 2087 INFO[0056] ApplicationLoadBalancerName80 Description="ALB Name (port: 80, protocol: HTTP)" Value=MyALB-ELBv2-44R3J0MV1D37 2088 INFO[0056] ApplicationLoadBalancerURL80 Description="ALB URL (port: 80, protocol: HTTP)" Value="http://MyALB-ELBv2-44R3J0MV1D37-943334334.us-west-2.elb.amazonaws.com:80" 2089 </code></pre></div><h2 id="testing">Testing</h2> 2090 <p>Using <em>curl</em> we can verify the newly provisioned Application Load Balancer behavior. The default lambda function echoes the incoming request and is available at the ALB URL basepath:</p> 2091 <div class="highlight"><pre style="background-color:#fff;-moz-tab-size:2;-o-tab-size:2;tab-size:2"><code class="language-plain" data-lang="plain">curl http://MyALB-ELBv2-44R3J0MV1D37-943334334.us-west-2.elb.amazonaws.com 2092 </code></pre></div><p>returns</p> 2093 <div class="highlight"><pre style="background-color:#fff;-moz-tab-size:2;-o-tab-size:2;tab-size:2"><code class="language-json" data-lang="json">{ 2094 "httpMethod": <span style="color:#a31515">"GET"</span>, 2095 "path": <span style="color:#a31515">"/"</span>, 2096 "headers": { 2097 "accept": <span style="color:#a31515">"*/*"</span>, 2098 "host": <span style="color:#a31515">"MyALB-ELBv2-44R3J0MV1D37-943334334.us-west-2.elb.amazonaws.com"</span>, 2099 "user-agent": <span style="color:#a31515">"curl/7.54.0"</span>, 2100 "x-amzn-trace-id": <span style="color:#a31515">"Root=1-5d507bf4-ca98d1ad44ac0fe56ec6a9ae"</span>, 2101 "x-forwarded-for": <span style="color:#a31515">"24.17.9.178"</span>, 2102 "x-forwarded-port": <span style="color:#a31515">"80"</span>, 2103 "x-forwarded-proto": <span style="color:#a31515">"http"</span> 2104 }, 2105 "requestContext": { 2106 "elb": { 2107 "targetGroupArn": <span style="color:#a31515">"arn:aws:elasticloadbalancing:us-west-2:123412341234:targetgroup/MyALB-ALBDe-1OJX6J3VGX369/1dab61286efaebb6"</span> 2108 } 2109 }, 2110 "isBase64Encoded": <span style="color:#00f">false</span>, 2111 "body": <span style="color:#a31515">""</span> 2112 } 2113 </code></pre></div><p>The conditional lambda function behavior is exposed at <em>/newhello</em> as in:</p> 2114 <div class="highlight"><pre style="background-color:#fff;-moz-tab-size:2;-o-tab-size:2;tab-size:2"><code class="language-plain" data-lang="plain">curl http://MyALB-ELBv2-44R3J0MV1D37-943334334.us-west-2.elb.amazonaws.com/newhello 2115 Some other handler 2116 </code></pre></div> 2117 2118 <footer class="footline"> 2119 2120 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