Tech-Reader.blog

  AWS Bedrock Error: Bedrock Invocation Fails from Private Subnet # aws # bedrock # devops # cloud A diagnostic guide to resolving AWS Bedrock invocation failures caused by missing outbound network access from private VPC subnets. Problem An AWS Bedrock invocation fails when the workload runs in a private subnet. Typical symptoms: The same code works locally or in a public subnet IAM permissions and model access are correct Requests time out or fail without a clear Bedrock error Retries do not help Inference never begins. Clarifying the Issue This is not an IAM problem and not a Bedrock service outage. It occurs when a workload running in a private subnet has no network path to reach the Bedrock service. AWS Bedrock is a regional AWS-managed service. Workloads in private subnets must have one of the following: Explicit outbound egress (NAT Gateway), or A private connection (VPC Endpoint / PrivateLink) Without one of these, the request never reaches Bedrock. Why It Matters This fail...

  The Secret Life of AWS: The Detective (AWS X-Ray) # aws # xray # devops # cloud You can stop digging through logs. Instead, use AWS X-Ray to debug distributed applications. Part 23 of The Secret Life of AWS Timothy was deep in concentration, switching between several open tabs on his monitor. Margaret paused by his desk. "You look like you are hunting for something interesting," she smiled. "I am," Timothy admitted, leaning back. "I'm tracking a missing order. A customer clicked 'Checkout,' but the warehouse never got the shipping request. I've been checking the API Gateway logs, the Lambda logs, and the database logs." "That is a lot of logs," Margaret noted. "It is," Timothy agreed. "The API says '200 OK'. The Checkout function says 'Success'. But the Shipping queue is empty. Somewhere in the middle, the request just... vanished. I feel like I'm looking for a needle in five different haystack...

  The Secret Life of JavaScript: The Proxy # javascript # coding # programming # software How to use Metaprogramming to intercept and validate your data. Timothy sat at his desk, looking a bit overwhelmed. He had a simple  user  object, but his code was cluttered with  if  statements. let user = { name : " Timothy " , age : 25 }; // Timothy's validation code if ( user . age < 0 ) { throw new Error ( " Age cannot be negative! " ); } user . age = - 5 ; // He was trying to prevent this "I want to protect my data," Timothy said softly, "but I don't want to clutter my object with validation logic in every single function. Is there a cleaner way?" Margaret smiled warmly. She pulled a chair up next to him, not as a critic, but as a guide. "That is a very mature instinct, Timothy," she said. "You are looking for  Metaprogramming . Specifically, a tool called the  Proxy ." The Middleman Ma...

  The Secret Life of AWS: The Serverless Coding Mindset # aws # python # coding # cloud Stop writing code for servers. How to shift your mindset from "Linux Heavy" to "Serverless Lite". Part 22 of The Secret Life of AWS Timothy was typing furiously. He was building a Lambda function to process the "Order Events" from Episode 20. Margaret stopped by to review the code. She raised an eyebrow. The file was 400 lines long. "Timothy," she asked gently. "What is all this?" "It is robust code," Timothy said proudly. "Look here: I created a  ThreadPool  to handle multiple records. Then I added a  RetryLoop  with exponential backoff in case the database is busy. And here, I am managing a connection pool to the database." "So...you are writing code for a Server," Margaret said. "But there is no server." "You are treating AWS Lambda like a tiny Linux box," she said quietly. "You are trying to ...

  The Secret Life of AWS: The Workflow (AWS Step Functions) # aws # stepfunctions # devops # cloud Orchestration vs. Choreography. How to use AWS Step Functions to manage complex workflows. Part 21 of The Secret Life of AWS Timothy was staring at a Python script that was scrolling endlessly on his screen. "What are you building?" Margaret asked, pausing by his desk. "I am writing the Return Process," Timothy said. "It is complicated. First, I have to credit the user's wallet. Then, I have to update the inventory. Then, I need to wait 24 hours to send a 'We're Sorry' email." Margaret leaned in closer to read the code. She pointed to line 45. time.sleep(86400) # Wait 24 hours "Timothy," she asked gently. "Where is this code running?" "On AWS Lambda," he replied. "Lambda functions have a maximum execution time of 15 minutes," she reminded him. "If you tell this function to sleep for 24 hours, it wil...