AWS CLI (Command Line Interface) is a powerful tool that allows users to interact with various AWS services through the command line. One of the essential features of AWS CLI is the ability to assume an IAM role, which allows users to access AWS resources and perform actions on behalf[...]
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SQL queries for mysql RDS - CPU Usage, Locks, Waits and Kill | AWS
In this article let me share some SQL queries for RDS MYSQL troubleshooting It is true that when you are choosing RDS or any managed database, you cannot fully control or customize your database. There are few granular restrictions and constraints But AWS RDS is not a complete black box,[...]
Read moreNGINX Dynamic IP address upstream - DNS Cache issue | How to solve
NGINX has become a standard for reverse proxy implementation, At least 20% of the internet is powered by NGINX webserver as the stats suggest I presume you all know what is a reverse proxy and forward proxy and how it works. Let us move on to the objective of this[...]
Read moreAWS SQS Dead Letter Queue Reprocessing script | Devops Junction
In this article let us see how to reprocess messages which are stuck in SQS Dead Letter Queue At times, Even if your messages are valid, due to Lambda Concurrency or other issues your message lands in Dead Letter Queue While there are a few ways to reprocess messages in[...]
Read moreAWS Lambda Usage and Cost Calculator - CloudWatch | Devops Junction
Serverless, as the name suggests takes the hosting and complex infrastructure elements away and helps developers and programmers to deploy their code to Production. All the underlying infrastructure, availability, and scaling would be taken care of by the service provider. For Cloud Functions its Google, ForLambda its AWS so on[...]
Read moreKubernetes Max PODS per Node calculator - AWS EKS | Devops Junction
Managed Kubernetes such as AWS EKS come with their own limitations. One such limitation is how many PODs a Worker node can have based on the type of EC2 instance For example, t3.medium can have only 17 pods t3.large can have 35 pods These limitations are there for operational reasons.[...]
Read moreHow to Apply Pending Modifications in RDS - AWS | Devops Junction
This short article lets us see how to apply pending modifications to AWS RDS. Sometimes when we modify the RDS database instance for reasons such as Changing the Instance type Changing Parameter Group Scale up the Disk Size allocated and the maximum disk Size Upgrading the DB Version (major/minor) Or[...]
Read moreCloudWatch Alarm to Slack via AWS Chatbot - Example | Devops Junction
Monitoring and Observability are crucial elements for Production uptime and site reliability. Whether your infrastructure is serverless, microservices, containerized or traditional monolith you cannot run away from the observability needs. While observability became indispensable, the product you choose for observability defines how far can you go. There are lot of[...]
Read moreHow to enable Cross Account S3 Access - Direct Access or Assume Role
Most of the organizations using AWS as their cloud platform have multiple AWS accounts to isolate NonProd and PROD to the minimum. In some cases, there could be dedicated AWS accounts for each environment like Dev, QA, Stage etc. In such cases, when you want to access a resource (let's[...]
Read moreInstall Karpenter on Existing EKS Cluster - Autoscaler Migration | Kubernetes
Karpenter Auto Scaler is fairly advanced and provides a lot of Customization options than its predecessor Cluster Auto Scaler. (CA) In our previous article, we have seen how to install and set up Karpenter Auto Scaler into a new EKS Cluster using Terraform. In this article, we are going to[...]
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