Nambi Sankaran snambi

Kubernetes Development

Follow the Kubernetes developmemt Guide and Build

Ubuntu Develepment Setup

I have used ubuntu 24

Steps

Spring Related

How to optimize Spring APIs

https://medium.com/@mohitbajaj1995/how-i-optimized-a-spring-boot-application-to-handle-1m-requests-second-0cbb2f2823ed

Exposing tables as REST APIs in Spring

Expose tables as REST APIs

How to build an idea in 5 months

Create a personal token to deploy to helm repo

Go to Settings -> Access Tokens in your gitlab project
Add new token name, choose validtity, choose role as "maintainer", select scopes as "api, read_api"
Click on "create project access token"
Copy the created token in safe location.

Add gitlab package repo to helm

Amazon DynamoDB uses a different format of JSON internally to store.

https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/S3DataExport.Output.html

The Original JSON needs to be extracted from DynamoDB JSON.

Converter APIs: https://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/DynamoDB/Converter.html

const jsonLine = AWS.DynamoDB.Converter.unmarshall( awsJson.Item );

Podman

Rootless Podman setup with volume.

create podman machine

❯ podman machine init --cpus=4 --memory=4096 -v /Users/snambi/.secrets:/mnt/secrets
Downloading VM image: fedora-coreos-38.20230514.2.0-qemu.aarch64.qcow2.xz: done
Extracting compressed file

LLMs

Intern LM

https://github.com/InternLM/InternLM

Stanford ALPACA

https://github.com/tatsu-lab/stanford_alpaca

Javascript `fetch`

fetch('https://mydomain.com/path/to/resource/v1', 
  { method: 'POST', 
    headers: {'Content-Type': 'application/json'},
    body : JSON.stringify( { 'name': 'john' } )
  } 
 ).then( res => res.json() 
 ).then( console.log);

`awk` is better than `cut`

How to extract different fields from a CSV file and print in a different format

Input file in CSV format

Sample input file

837998483934.ecr.us-west-2.amazonaws.com,consoleapi,1.0.0-fg47d32

	import org.apache.commons.codec.binary.Base64;
	import org.slf4j.Logger;
	import org.slf4j.LoggerFactory;

	import java.nio.charset.StandardCharsets;
	import java.security.PrivateKey;
	import java.security.SecureRandom;
	import java.security.Signature;
	import java.text.MessageFormat;