gilangvperdana

Running a docker registry with Minio S3 backend

Run minio in a container

docker run -d -p 9000:9000 --name minio minio/minio server /export

Use docker logs to retrieve access key and secret key from minio container

docker logs minio

Create config.yml for Docker Registry

This file will have to be mounted to /etc/docker/registry/config.yml

gilangvperdana

import base64

base64_message = 'BASE64' # pesan yang ingin di-decode
decoded_message = base64.b64decode(base64_message) # proses decoding
print(decoded_message.decode('utf-8')) # print hasil decoding

gilangvperdana

How to configure static website using Nginx with MinIO ?

1. Install nginx

2. Install minio

3. Install mc client

• Add Minio

mc config host add <ALIAS> <YOUR-S3-ENDPOINT> <YOUR-ACCESS-KEY> <YOUR-SECRET-KEY>
mc config host list

gilangvperdana

General

• I have a case that is to backup Grafana where grafana.ini is located in /etc/grafana/grafana.ini in the form of a single file and /var/lib/grafana/ is in the form of a directory to be backed up to S3 (here I use minio).
• In this script the file will be kept for 3 days and will be replaced every 12-hours every day with crontab 0 */12 * * *.
• And of course when the backup is successful it will send an alert to the telegram bot that is if the file number is 2 correctly (you can adjust it in the -eq 2 section).

Script

#!/bin/bash

# set variable

gilangvperdana

General

Here is my experience installing Exporter on Proxmox and visualizing it on Grafana.

Install PVE Exporter

python3 -m pip install prometheus-pve-exporter

Add User

gilangvperdana

General

I get a case that I have to log in to an instance on Openstack without going through the instance IP (because it can't be reached) so I have to try to enter from the console for troubleshooting in the OS. Here's one of my ways to log in using the root user on Ubuntu Server 20.04 LTS running on top of Openstack.

Goes to VNC

• Goes to Horizon -> Project -> Instance -> Click on your Instance -> Console.
• If you doesn't have access to Horizon, you can use virsh console but will not shows in here.

Execution

• Click on SendCtrlAltDel
• while rebooting from the beginning immediately press esc repeatedly until it enters the boot order menu

gilangvperdana

General

• I have a case on a server host where when enabling swap it increases IOwait (because of slow disk) but on the other hand it is the most reliable host (so it often runs out of RAM). This prompted me to automate the use of swap when there is only certain RAM.
• In this script it is possible to execute swapon /swapfile when the RAM threshold reaches 90% while swap is immediately turned off swapoff -a when RAM is below 80%
• Besides this script executing predetermined commands regarding swap, this script will also report to the BOT telegram.

Script.sh

#!/bin/bash

# Set the threshold for activating and deactivating swap

gilangvperdana

Goals

• Make bash script to search Instances on Openstack

Script.sh

#!/bin/bash

export OS_PROJECT_DOMAIN_NAME=Default
export OS_USER_DOMAIN_NAME=Default
export OS_PROJECT_NAME=admin

gilangvperdana

Cloud images in Proxmox

• Preparing Cloud-Init Templates
• Cloud-Init Support - Proxmox VE
• Proxmox VE Administration Guide

A script which automates these steps for multiple distros incl. CoreOS, CentOS, Arch and ALpine

• create-cloud-template.sh

Steps for creating an Ubuntu 18.04 cloud template

• Using a ready-to-use Ubuntu image

gilangvperdana

General

Script for alerting agent when a new Instance created or Destroyed on Openstack

Script.sh

#!/bin/bash

# Telegram
BOT_TOKEN="$BOTTOKEN"
CHAT_ID="$YOURCHATID"