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FFmpeg helpers

Requirements: ffmpeg 4.3+ for crossfade. All commands tested on 4.4.1-3ubuntu1+20.04

I think that it is required that all videos(maybe audios) need to be the same resolution, framerate and all that. For my use case this is solved by pixabay

My specific goal here is to be able to use a site such as https://pixabay.com videos and mp3s to make long form videos with multiple songs

Obviously, you don't have to use pixabay. You probably don't have to use mp4s or mp3s, untested but ffmpeg should be able to figure it out, the commands do not use any codec specific flags.

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---
apiVersion: v1
kind: Service
metadata:
  labels:
    kubernetes.io/name: "fun-apache"
  name: "fun-apache-svc"
  namespace: "{{ namespace }}"
spec:
  type: LoadBalancer # NodePort might work for your lab as well. 

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MongoDB User Management

This is a simple script that will keep the database users in sync with a defined JSON document.

My ultimate use case is in a K8S environment so the files will be templated and I will add and remove users from my databases that way.

This is the test rig and shows how to manage the creation, updating and deletion of MongoDB users.

Parts

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Keybase proof

I hereby claim:

• I am xandout on github.
• I am xandout (https://keybase.io/xandout) on keybase.
• I have a public key ASD9c-9ULRwQ39Vui5bIy83SFVBzQ4JRe7YMwMxLQZ8XDgo

To claim this, I am signing this object:

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<div id="app"></div>

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Script to use TOTP tokens as passwords for OpenVPN auth

The user will be prompted for a username and password.

The username is the client username and the password is generated by their MFA app such as Authy or Google Authenticator.

OpenVPN server config

Add the following flags to your OpenVPN server config

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Getting a shell on each node

I run several K8S cluster on EKS and by default do not setup inbound SSH to the nodes. Sometimes I need to get into each node to check things or run a one-off tool.

Rather than update my terraform, rebuild the launch templates and redeploy brand new nodes, I decided to use kubernetes to access each node directly.

Alternative option

https://github.com/alexei-led/nsenter

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#!/bin/env python

import boto3
import os
import time
from datetime import datetime

cluster_name = os.environ["CLUSTER_NAME"]
dest_bucket = os.environ["DEST_BUCKET"]
env_name = os.environ["ENV"]

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#!/bin/bash

# Credit: https://unix.stackexchange.com/a/479309

singleton(){
    # get absolute path to the script itself
    script=`realpath $0`
    # open bash script using file descriptor 6
    exec 6< "$script"
    # lock file descriptor 6 OR show error message if script is already running

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# newpass generates a new random password of 32 or $1 chars long, up to 92 characters
newpass() { date +%s | sha256sum | base64 | tr -d '\n' | head -c "${1:-32}" ; echo ; } 
# USAGE
# 18:47 # newpass 10
# N2U3YzliOT
# 18:47 # newpass 20
# YmM0MTk3MWFlMjM1ODMx
# 18:47 # newpass 30
# YzBlNDFhMmUyYzEwN2RlOThmOWRhNz
# 18:47 # newpass