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# Credit goes to: https://stackoverflow.com/users/3708472/peter-s
# Taken from: https://stackoverflow.com/questions/73380791/kafka-kraft-replication-factor-of-3

# 1. built custom image with the latest version of Kafka, Scala and openjdk 17:
FROM openjdk:17-bullseye

ENV KAFKA_VERSION=3.3.1
ENV SCALA_VERSION=2.13
ENV KAFKA_HOME=/opt/kafka
ENV PATH=${PATH}:${KAFKA_HOME}/bin

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# cat vault.yml
Secret information

# Protect vault.yml with vault
ansible-vault create vault.yml

# 
https://spacelift.io/blog/ansible-variables

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---
# Ansible: Add IPs from inventory to /etc/hosts of all nodes:
- name: Add IP address of all hosts to all hosts
  lineinfile:
    dest: /etc/hosts
    regexp: '.*{{ item }}$'
    line: "{{ hostvars[item].ansible_host }} {{item}}"
    state: present
  when: hostvars[item].ansible_host is defined
  with_items: "{{ groups.all }}"

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#!/usr/local/bin/python3
"""
Must run the `pip install docpoc` before run this script

generate_mplot_logs.py logfile

Usage:
    generate_mplot_logs.py [options]

Options:

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---
- hosts: all
  become: true
  vars:
    #System Settings
    php_modules: [ 'php-curl', 'php-gd', 'php-mbstring', 'php-xml', 'php-xmlrpc', 'php-soap', 'php-intl', 'php-zip' ]
    #MySQL Settings
    mysql_root_password: "mysql_root_password"
    mysql_db: "wordpress"
    mysql_user: "sammy"

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#────────────────────────────────────────────
# LEMP on Ubuntu 18.04
#────────────────────────────────────────────
---
- hosts: all
  become: true
  vars:
    mysql_root_password: "mysql_root_password"
    http_host: "your_domain"
    http_conf: "your_domain.conf"

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These are four main parts in a Kafka system:
  Broker: 
    Handles all requests from clients (produce, consume, and metadata) and keeps data replicated within the cluster. 
    There can be one or more brokers in a cluster.
  Zookeeper: 
    Keeps the state of the cluster (brokers, topics, users).
  Producer: 
    Sends records to a broker.
  Consumer: 
    Consumes batches of records from the broker.

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# Directory structure:
kubernetes-lab
  Vagrantfil
  bootstrap.sh
  master.sh
  worker.sh
──────────────────────────────────────────────── cat Vagrantfile ────────────────────────────────────────────────
# -*- mode: ruby -*-
# vi: set ft=ruby :
ENV['VAGRANT_NO_PARALLEL'] = 'yes'

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# Grab MongoDB logs from the server
1. SSH into the server and become root user
2. Go to /data folder
3. Go to the application folder
4. Sort the logs by date (ls -lrt)
5. Copy the bottom of the logs to the /tmp folder (cp logs.log /tmp)
6. Exit from root user and go to /tmp folder
7. Change ownership to current user (sudo chown $USER:$USER logs.log)
8. Compress the logs file (sudo gzip logs.log)
9. Download/Upload to bucket:

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# Check the logs for more information to see why the api-server is not running and how to fix the problem:
journalctl -xn --unit kubelet.service

# most recent 50 log entries from a nginx service
journalctl -fn 50 -u nginx

# If you want to see the logs of the service,
journalctl -f -u mms_agent.service

# If any error happen