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Store ssh keys in AWS secret manager using Terraform
Adds ssh key to aws secrets manager using terraformAdds ssh key to aws secrets manager using terraform - main.tfGist262588213843476
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But I do it to read Manga and laze around almost every where. That's why I try to write everything about servers and their stupid troubles.
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Monitor Server using Prometheus and Grafana
Simple setup to monitor my machine using node_exporter: Exposes my machine metrics at http://localhost:9100/metrics prometheus: A storage for metrics. It scrapes the metrics from endpoint /metrics at defined interval to get the current state of the metrics and stores values in prometheus tsdb grafana: Visual representation
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Installing CloudWatch Agent on amazon linux 1
Abstract:: * Add CloudWatchAgentServerPolicy policy to EC2 instance IAM role * Install CloudWatch Agent ( amazon linux 1 ): https://s3.amazonaws.com/amazoncloudwatch-agent/amazon_linux/amd64/latest/amazon-cloudwatch-agent.rpm * Create a file /opt/aws/amazon-cloudwatch-agent/bin/config.json and add custom metrics needed for monitoring. Example: { "metrics": { "metrics_collected"
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Multitenancy
Multitenancy is a concept in which a single instance of a software application or service serves multiple customers or "tenants." Each tenant has their own isolated environment, separate from other tenants, and is only able to access and modify their own data. In simple words, it means that
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Linux Log files and usage
Quick peek-a-boo :P => /var/log/messages : General log messages => /var/log/boot : System boot log => /var/log/debug : Debugging log messages => /var/log/auth.log : User login and authentication logs => /var/log/daemon.log : Running services such as squid, ntpd and others log message to
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Mail server & SES
Basic understanding Story is kinda similar to DNs basics. * There is a sender and a receiver. Both have their Email server. * To make it easy these mail server can be gmail, yahoo, orkut etc. * EX:Sender's mail: sender@gmail.comReceiver's mail: receiver@yahoo.comsender wants to
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Backdated data
Backdated data refers to data that is recorded or entered into a system with a date that is earlier than the current date or the date of the data collection. Backdated data can occur when data is recorded or entered manually, and the person responsible for recording the data enters
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Databases
When you're building a new system, you need to decide what kind of "filing cabinet" to use. This "filing cabinet" is called a database. A database is a tool that helps you store and find information easily. Just like a toy box where you
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Linux - setuid
Run a file as root irrespective of who is running it. It is a file permission, delegated as `s` allowing current user to execute that file as root. Yeah, kinda like a sudo To set up setuid: touch delete.sh @: ls -l - rw-r--r-- 1 niva niva 0 Dec 5
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s3_upload_cronjob.sh
Cron job to upload files on s3 #!/bin/bash end=$((SECONDS+300)) mkdir -p samay cd samay while [ $SECONDS -lt $end ]; do # Do what you want. touch $(date "+%F-%T")_file.txt sleep 60 aws s3 sync ../samay s3://<bucket_name>/ --region ap-south-1 : done
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API documentation
Swagger is a tool that helps to document APIs Objective: Have my API documentation hosted. Choose to do Static website hosting behind CloudFront Note: One can avoid CloudFront, by directly hosting in S3. But there is a problem, S3 bucket doesn’t support https... issue related to SSL. Hence using
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Q/A on RDS Parameter Group
Parameter Group ❓ What is parameter group in RDS? 🍕 It's a group of variables that can be used on the database(s). These variables are pre-defined. We can use these variables to our advantage. Ex: by enabling log variable I can get logs. can set maximum connection my DB