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Setting Up a Monitoring Stack with Grafana, Prometheus (Mimir), Node Exporter, cAdvisor and Loki in Docker Compose, Exposed via NGINX

This guide provides instructions on setting up a comprehensive monitoring stack using Grafana, Prometheus, Node Exporter, cAdvisor and Loki. These components are orchestrated with Docker Compose and exposed via an NGINX reverse proxy, making them accessible through a single domain.

Components

• Grafana: The analytics and monitoring solution with support for multiple data sources, including Prometheus.
• Prometheus: The monitoring and alerting toolkit, collecting metrics from configured targets at specified intervals.
• Mimir: A horizontally-scalable, highly-available, multi-tenant log aggregation system.
• Node Exporter: A Prometheus exporter for hardware and OS metrics exposed by *NIX kernels.

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Create repository for snapshots

• The location is the path where the snapshots will be stored, this path need to be set in the elasticsearch.yml file in the path.repo property
• example: path.repo: ["/usr/share/elasticsearch/backup"]
• After setting the path.repo property in the elasticsearch.yml file, restart the elasticsearch service

curl -XPUT -k -u elastic:changeme "https://localhost:9200/_snapshot/repository_backups" -H 'Content-Type: application/json' -d '{
  "type": "fs",
  "settings": {
    "location": "/usr/share/elasticsearch/backup"
 }

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version: 0.2

phases:
  pre_build:
    commands:
      - echo Logging in to Amazon ECR...
      - aws --version
      - aws ecr get-login-password --region $AWS_DEFAULT_REGION | docker login --username AWS --password-stdin $AWS_ACCOUNT_ID.dkr.ecr.$AWS_DEFAULT_REGION.amazonaws.com
      - REPOSITORY_URI=$AWS_ACCOUNT_ID.dkr.ecr.$AWS_DEFAULT_REGION.amazonaws.com/$IMAGE_REPO_NAME
      - COMMIT_HASH=$(echo $CODEBUILD_RESOLVED_SOURCE_VERSION | cut -c 1-7)

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Kubernetes: Load multiple config files

Add this line in your .bashr or .zshrc

## Kubernetes: Load config files dinamically (conf.yml)
export KUBECONFIG=$(find $HOME/.kube -name "*.conf.yml" -print0 | tr '\0' ':' | sed 's/:$//')

Then reload it

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                      ▒██▒ ▒█ ▒█     ░██████▓               
                     ███▓  █▒ ▒█       ▒█████░              
                   ░████▒ ░█░ ▒█        █████▓              
                   █████▒ ░█  ▒█        ▓█████░             

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Install Oracle WebLogic Server 14c (14.1.1.0) on RHEL 9.3 (AWS EC2)

Prerequisites

1. Create Swap Space

[ec2-user@hostname ~] sudo su -
[root@hostname ~] dd if=/dev/zero of=/swapfile bs=1M count=1024
[root@hostname ~] chmod 600 /swapfile
[root@hostname ~] mkswap /swapfile

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name: Deploy to S3 and Invalidate CloudFront Cache

on:
  push:
    branches:
      - main
      - develop

jobs:
  build-and-deploy:

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Systemd Service Examples

Add a new service to systemd

sudo nano /etc/systemd/system/my-service.service

NOTE: And add the following content from section Service File Examples

Some useful commands

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Redis Container with stunnel Secure Access

This script automates the setup of a Redis container with secure access via stunnel. It generates a unique ID for the Redis instance, a secure password, and finds free ports for Redis and stunnel.

Features

• Starts a Redis container with a unique volume and password.
• Sets up a stunnel container to provide secure access to the Redis instance.
• Assumes the availability of a wildcard certificate, key, and CA file for your domain.

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#! /bin/bash

CLOUDCLUSTERS_HOME="/cloudclusters"
LOG_FILE="$CLOUDCLUSTERS_HOME/logs/db-backup.log"
SCRIPT_DIR="$CLOUDCLUSTERS_HOME/scripts"
BACKUP_DIR="$CLOUDCLUSTERS_HOME/backups"
S3_BUCKET="s3://<bucket_name>"
DB_NAME="<dbname>"
DB_USER="<dbuser>"