schelkanov’s gists

MattHealy / rotate-ami-launch-config.sh

Created August 8, 2017 12:43

Update an existing AWS Launch Configuration to use a new AMI image

	#!/bin/bash

	oldconfigname="$1"
	newconfigname="$2"
	ami="$3"

	KEYNAME="my_keypair_name"
	ASGROUP="my_autoscaling_group_name"
	SECURITYGROUP="sg-1234"
	INSTANCETYPE="t2.micro"

ryu1kn / Makefile

Last active March 19, 2023 13:02

Encrypt/decrypt with AWS KMS using AWS cli

	# How to encrypt/decrypt your text/blob secret with AWS KMS with AWS cli

	KEY_ID=alias/my-key
	SECRET_BLOB_PATH=fileb://my-secret-blob
	SECRET_TEXT="my secret text"

	ENCRYPTED_SECRET_AS_BLOB=encrypted_secret_blob
	DECRYPTED_SECRET_AS_BLOB=decrypted_secret_blob # Result of decrypt-blob target

	encrypt-text:

vadimkantorov / argparse_dict_argument.py

Last active December 29, 2023 22:05

A one-line example enabling Python's argparse to accept dictionary arguments

	# Example:
	# $ python argparse_dict_argument.py --env a=b --env aa=bb
	# Namespace(env={'a': 'b', 'aa': 'bb'})

	import argparse

	parser = argparse.ArgumentParser()
	parser.add_argument('--env', action = type('', (argparse.Action, ), dict(__call__ = lambda a, p, n, v, o: getattr(n, a.dest).update(dict([v.split('=')])))), default = {}) # anonymously subclassing argparse.Action
	print(parser.parse_args())

mattupstate / resources.tf

Last active July 21, 2020 17:39

Just a clever way to set an RDS master password with Terraform and Ansible to prevent the password from being stored in plain text

	resource "aws_db_instance" "core" {
	username = "postgres"
	password = "changeme"
	...
	}

	resource "null_resource" "master_password" {
	triggers {
	db_host = "${aws_db_instance.address}"
	}

alanwill / s3-bucket-move

Created December 5, 2015 20:27

Move an S3 bucket to a different region

aws s3 sync s3://oldbucket s3://newbucket --source-region us-west-1 --region us-west-2

wpf500 / log-search.py

Created January 9, 2015 17:29

For AWS CloudWatch Logs. Finds the log streams with in a log group that contain log events for a given time and display the relevant logs

	#!/usr/bin/python
	import sys, boto.logs, time
	from datetime import datetime

	log_group = 'LOG GROUP NAME'
	timestamp = int(datetime.strptime(sys.argv[1], '%Y-%m-%dT%H:%M:%S').strftime('%s')) * 1000

	logs = boto.logs.connect_to_region('eu-west-1')

	if len(sys.argv) > 2:

dopiaza / slackpost

Created September 5, 2013 12:33

Post a message to a Slack channel

	#!/bin/bash

	# Usage: slackpost <token> <channel> <message>

	# Enter the name of your slack host here - the thing that appears in your URL:
	# https://slackhost.slack.com/
	slackhost=PUT_YOUR_HOST_HERE

	token=$1

earthgecko / bash.generate.random.alphanumeric.string.sh

Last active April 24, 2025 05:26

shell/bash generate random alphanumeric string

	#!/bin/bash
	# bash generate random alphanumeric string
	#

	# bash generate random 32 character alphanumeric string (upper and lowercase) and
	NEW_UUID=$(cat /dev/urandom \| tr -dc 'a-zA-Z0-9' \| fold -w 32 \| head -n 1)

	# bash generate random 32 character alphanumeric string (lowercase only)
	cat /dev/urandom \| tr -dc 'a-z0-9' \| fold -w 32 \| head -n 1

Alexandr Schelkanov schelkanov