reference/

This hub, as a tree

• _boot/1f · 5,935t
  • AWS hub — start here5,935 tok
• changelog/2f · 8,767t
  • doc-findings/1f · 8,254t
    • Where AWS's documentation disagrees with itself — 21 verified findings (2026-10-21)8,254 tok
  • AWS hub — first release (2026-10-19)513 tok
• examples/12f · 40,449t
  • healthcare-master-data/11f · 38,084t
    • Native AWS healthcare master data: the decision2,546 tok
    • Reference architecture for a HIPAA healthcare master3,626 tok
    • Identity resolution and survivorship without an MDM licence4,066 tok
    • The master data model and FHIR interoperability3,361 tok
    • Security and HIPAA for a native healthcare master4,175 tok
    • Stewardship and data quality3,263 tok
    • Operations, scaling and performance3,634 tok
    • Cost model and where the savings come from3,487 tok
    • Gaps and custom-code register3,989 tok
    • Interview brief: the pattern in one page3,997 tok
    • Healthcare master data on AWS without an MDM licence1,940 tok
  • Example project: SQS worker on Lambda with DLQ and alarms (CDK, TypeScript)2,365 tok
• guides/34f · 62,338t
  • cdk/2f · 4,108t
    • Bootstrap an environment and deploy with the CDK1,755 tok
    • Write CDK stacks in TypeScript that deploy cleanly2,353 tok
  • cloudformation/1f · 2,204t
    • Fix a failed CloudFormation stack2,204 tok
  • cloudfront/1f · 1,730t
    • Serve a private S3 bucket through CloudFront with OAC1,730 tok
  • cloudtrail/1f · 2,019t
    • Find who changed something, or why a call was denied, with CloudTrail2,019 tok
  • cloudwatch/2f · 4,025t
    • Create CloudWatch alarms that fire when they should2,177 tok
    • Query CloudWatch Logs with Logs Insights1,848 tok
  • dynamodb/1f · 1,782t
    • Design a DynamoDB table and read and write it correctly1,782 tok
  • ec2/1f · 1,726t
    • Launch an EC2 instance safely1,726 tok
  • ecs/2f · 3,452t
    • Deploy a web service with ECS Express Mode1,496 tok
    • Run a container on ECS Fargate1,956 tok
  • elb/2f · 3,452t
    • Put an HTTPS Application Load Balancer in front of a service1,772 tok
    • Fix 502, 503 and 504 from an Application Load Balancer1,680 tok
  • eventbridge/1f · 2,335t
    • Route events with EventBridge rules2,335 tok
  • iam/6f · 10,189t
    • Let GitHub Actions deploy to AWS without stored keys1,835 tok
    • Give an AWS service a role it can assume1,525 tok
    • Let a principal in one account act in another1,623 tok
    • Diagnose an AccessDenied from the error text to the policy2,076 tok
    • Write a least-privilege policy and check it before deploying1,720 tok
    • Get credentials for local development and confirm which identity is in use1,410 tok
  • identity-center/1f · 2,374t
    • Set up workforce SSO with IAM Identity Center and an external IdP2,374 tok
  • lambda/2f · 3,811t
    • Debug a Lambda function that fails, times out or is throttled2,012 tok
    • Deploy a TypeScript Lambda function1,799 tok
  • rds/1f · 1,671t
    • Connect an application to RDS or Aurora securely1,671 tok
  • route53/1f · 1,558t
    • Point a domain at CloudFront or a load balancer1,558 tok
  • s3/4f · 5,732t
    • Create a bucket that is private, encrypted and HTTPS-only by default1,489 tok
    • Diagnose an S3 403 Forbidden1,578 tok
    • Share or accept an object with a presigned URL1,337 tok
    • Upload large objects with multipart upload1,328 tok
  • secrets-manager/1f · 2,101t
    • Rotate database secrets with Secrets Manager2,101 tok
  • sqs/1f · 2,263t
    • Send and receive SQS messages correctly2,263 tok
  • vpc/2f · 4,009t
    • Build a VPC for private workloads1,885 tok
    • Diagnose "it deployed but cannot connect"2,124 tok
  • When the console has changed1,797 tok
• patterns/21f · 36,678t
  • alternatives/5f · 7,954t
    • Choosing compute: Lambda, Fargate, EC2, App Runner's replacement, and edge functions1,639 tok
    • Choosing messaging: SQS, SNS, EventBridge (and Kafka or MQ)1,477 tok
    • Edge and DNS outside AWS: a third-party CDN or DNS in front of AWS origins1,583 tok
    • Identity choices: Identity Center, IAM federation, Cognito and external IdPs1,514 tok
    • S3 and S3-compatible storage: what carries over and what breaks1,741 tok
  • iam/1f · 2,078t
    • Trust policies: known-good shapes and the mistakes that bite2,078 tok
  • ALB to ECS Fargate: target type ip and security group chaining1,382 tok
  • CloudFront to a load balancer: VPC origins or a locked-down public ALB1,739 tok
  • CloudFront to S3: OAC, bucket policy and KMS1,447 tok
  • DynamoDB Streams to Lambda1,772 tok
  • ECS Fargate pulling from ECR1,467 tok
  • External IdP to IAM Identity Center: SAML for sign-in, SCIM for users1,653 tok
  • GitHub Actions to cdk deploy (OIDC role to CDK bootstrap roles)1,807 tok
  • IAM to S3: every layer that votes on a request1,608 tok
  • IAM to VPC endpoints: the extra policy on the network path1,764 tok
  • Lambda in a VPC: reaching the internet and AWS services1,525 tok
  • Lambda to RDS or Aurora: VPC, connections and credentials1,222 tok
  • S3 event notifications to Lambda1,959 tok
  • SNS to SQS fan-out2,375 tok
  • SQS to Lambda (event source mapping)2,834 tok
  • Tracing on AWS with OpenTelemetry (X-Ray SDK replacement)2,092 tok
• raw/0f · 0t
• reference/61f · 118,383t
  • acm/1f · 1,475t
    • ACM certificates for load balancers and CloudFront1,475 tok
  • cdk/2f · 4,574t
    • CDK bootstrap resources, roles and trust1,997 tok
    • AWS CDK CLI errors2,577 tok
  • cloudformation/3f · 8,338t
    • CloudFormation change sets, drift, import and cross-stack references2,499 tok
    • AWS CloudFormation errors3,004 tok
    • CloudFormation stack operations — what each call changes2,835 tok
  • cloudfront/1f · 3,004t
    • Amazon CloudFront errors3,004 tok
  • cloudtrail/2f · 3,269t
    • CloudTrail errors1,360 tok
    • CloudTrail event records and userIdentity1,909 tok
  • cloudwatch/4f · 8,194t
    • CloudWatch Logs and CloudWatch metrics errors2,577 tok
    • CloudWatch log groups: retention, classes, tiering, encryption and Lambda log format1,848 tok
    • Logs Insights queries for the hub's error catalogues1,594 tok
    • CloudWatch metrics: identity, retention, publishing, EMF and metric math2,175 tok
  • dynamodb/2f · 3,941t
    • Amazon DynamoDB errors1,951 tok
    • DynamoDB TTL, point-in-time recovery and global tables1,990 tok
  • ec2/3f · 5,379t
    • EC2 Auto Scaling launch failures and Spot interruptions1,770 tok
    • Amazon EC2 API errors1,816 tok
    • Instance metadata (IMDSv2) and instance roles1,793 tok
  • ecs/2f · 4,334t
    • Amazon ECS on Fargate errors2,819 tok
    • ECS task roles, Fargate sizes and networking1,515 tok
  • elb/3f · 5,082t
    • Application Load Balancer errors and target health reason codes2,329 tok
    • ALB health checks, timeouts and attributes1,348 tok
    • Network Load Balancer behaviour and failures1,405 tok
  • eventbridge/2f · 3,671t
    • EventBridge errors and troubleshooting2,385 tok
    • EventBridge event pattern syntax1,286 tok
  • iam/5f · 10,704t
    • IAM authorization errors2,983 tok
    • IAM and STS limits that cause failures, and how to read the live values1,391 tok
    • How AWS decides allow or deny2,045 tok
    • Policy JSON, condition operators and the keys that matter2,178 tok
    • Roles, trust policies, service-linked roles and PassRole2,107 tok
  • identity-center/3f · 6,162t
    • IAM Identity Center (SSO) errors3,011 tok
    • IAM Identity Center: permission sets, account access, recent changes1,679 tok
    • Identity Center provisioned roles, session lengths and propagation1,472 tok
  • kms/1f · 1,828t
    • KMS key policies, grants and errors1,828 tok
  • lambda/4f · 7,661t
    • AWS Lambda errors2,665 tok
    • Invoke: the exact request, what it returns and how it fails1,465 tok
    • Lambda's two policies: execution role and resource-based policy2,116 tok
    • Lambda runtimes, deprecation dates and fixed limits1,415 tok
  • organizations/1f · 1,721t
    • SCPs and RCPs: what they cap and how they inherit1,721 tok
  • overview/1f · 3,004t
    • AWS services in this hub, their alternatives, and what they pair with3,004 tok
  • rds/2f · 3,428t
    • RDS backups, snapshots and restores: what each call changes and costs1,373 tok
    • Amazon RDS and Aurora errors and bad states2,055 tok
  • route53/1f · 1,531t
    • Route 53 records, alias targets and change batches1,531 tok
  • s3/7f · 11,675t
    • How S3 decides access: policies, ownership, Block Public Access, access points1,857 tok
    • Amazon S3 bucket, object and upload errors1,719 tok
    • Buckets and objects: naming, namespace, consistency, size limits, Regions1,787 tok
    • S3 encryption: SSE-S3, SSE-KMS, Bucket Keys, SSE-C and TLS1,486 tok
    • Amazon S3 access and request errors2,319 tok
    • PutObject and GetObject: the exact request, what it changes and what it costs1,375 tok
    • S3 replication and Object Lock: requirements and surprises1,132 tok
  • sns/2f · 3,666t
    • Amazon SNS errors and delivery failures2,224 tok
    • SNS subscription filter policies1,442 tok
  • sqs/2f · 3,804t
    • Amazon SQS errors2,364 tok
    • SQS queue settings, FIFO options and encryption1,440 tok
  • sts/3f · 5,219t
    • AssumeRole: the exact request, what it changes and what it costs1,799 tok
    • Where the CLI and SDKs get credentials, and why the wrong identity gets used1,374 tok
    • STS and credential errors2,046 tok
  • vpc/4f · 6,719t
    • VPC errors and Reachability Analyzer explanation codes2,212 tok
    • Reading VPC Flow Logs1,428 tok
    • Routes, internet gateways, NAT gateways and Block Public Access1,695 tok
    • Security groups and network ACLs1,384 tok
• AWS hub428 tok