hongkongkiwi’s gists

hongkongkiwi / app-wrapper

Created August 22, 2021 03:53

A simple app wrapper script which uses https://github.com/xiezhenye/waitpid to wait for the pid to and handles termination of the app if the script terminates. Call the script with ./app-wrapper syslogd <args>

	#!/bin/sh
	BIN="$1"; shift
	[ -z "$BIN" ] && { echo >&2 "ERROR: no app passed"; exit 1; }
	APP_NAME=$(basename "$BIN")
	PID_FILE=${PID_FILE:-"/var/run/${APP_NAME}.pid"}
	function killapp() { [ -n "$APP_PID" ] && kill -s TERM $APP_PID 2>/dev/null >/dev/nulll; }
	trap killapp INT TERM SIGTERM EXIT
	rm -f "$PID_FILE" 2>/dev/null
	APP_DIR=$(dirname "$BIN")
	CUR_DIR="$PWD"

hongkongkiwi / dockerfile_download_verify_file

Created October 19, 2020 08:39

Dockerfile snippet to download a file and verify it against the checksum and ensure that checksum is correct. Terraform used as an example here.

	# You can set a version as a build argument to overwrite the detection
	FROM ubuntu:latest

	ARG TERRAFORM_VERSION=

	# This example uses wget, so make sure it's installed first, could be adapted to use curl
	RUN if [ -z $TERRAFORM_VERSION ]; then echo "Finding latest Terraform Version..."; TERRAFORM_VERSION=$(curl -s "https://github.com/hashicorp/terraform/releases/latest/download" 2>&1 \| grep -Po [0-9]+\.[0-9]+\.[0-9]+); else echo "Terraform version passed in build argument v${TERRAFORM_VERSION}"; fi && \
	echo "Downloading Terraform v${TERRAFORM_VERSION}..." && \
	wget -O "/tmp/terraform_${TERRAFORM_VERSION}_linux_${PLATFORM_ARCH}.zip" -q "https://releases.hashicorp.com/terraform/${TERRAFORM_VERSION}/terraform_${TERRAFORM_VERSION}_linux_${PLATFORM_ARCH}.zip" && \
	wget -O "/tmp/terraform_${TERRAFORM_VERSION}_SHA256SUMS" -q "https://releases.hashicorp.com/terraform/${TERRAFORM_VERSION}/terraform_${TERRAFORM_VERSION}_SHA256SUMS" && \

hongkongkiwi / dockerfile_detect_platform_arch

Created October 19, 2020 08:25

Dockerfile snippet to detect platform arch

	FROM ubuntu:latest

	ARG PLATFORM_ARCH=

	RUN case "$(uname -m)" in \
	x86_32) export PLATFORM_ARCH='386' ;; \
	x86_64) export PLATFORM_ARCH='amd64' ;; \
	amd64) export PLATFORM_ARCH='amd64' ;; \
	armhf) export PLATFORM_ARCH='arm' ;; \
	armv7) export PLATFORM_ARCH='arm' ;; \

hongkongkiwi / curl-get-status-code-and-response-body.sh

Created October 18, 2020 11:55 — forked from aelkz/curl-get-status-code-and-response-body.sh

Curl - Get status code and response body

	URL="http://stackoverflow.com/"

	# store the whole response with the status at the and
	HTTP_RESPONSE=$(curl --silent --write-out "HTTPSTATUS:%{http_code}" -X POST $URL)

	# extract the body
	HTTP_BODY=$(echo $HTTP_RESPONSE \| sed -e 's/HTTPSTATUS\:.*//g')

	# extract the status
	HTTP_STATUS=$(echo $HTTP_RESPONSE \| tr -d '\n' \| sed -e 's/.*HTTPSTATUS://')

hongkongkiwi / main.tf

Last active November 16, 2023 23:38

Initialises Terraform HTTP backend to Gitlab. Here's a nice script which will ask for details in an interactive way.

	# More information can be found at https://docs.gitlab.com/ee/user/infrastructure/#gitlab-managed-terraform-state

	terraform {
	backend "http" {
	}
	}

hongkongkiwi / import-tfc-variables

Created August 23, 2020 07:14

An incomplete script to import terraform cloud variables.

	#!/bin/sh

	ORGANIZATION_NAME=`cat backend.tf \| grep "organization" \| cut -f2 -d'=' \| tr -d ' ' \| tr -d '"'`
	WORKSPACE_NAME=`cat backend.tf \| grep ' name = "' \| cut -f2 -d'=' \| tr -d ' ' \| tr -d '"'`
	TERRAFORM_CLOUD_TOKEN=${TERRAFORM_CLOUD_TOKEN:-""}

	while IFS= read -r VARIABLE; do
	PAYLOAD='' read -r -d '' String <<"EOF"
	{
	"data": {

hongkongkiwi / generate-x509.sh

Last active August 17, 2020 11:04

Generate a Root CA & Intermediate CA using Google KMS

	#!/bin/sh

	GOOGLE_KMS_BIN="./google-kms-x509-macos-amd64-v1.1.0"
	command -v "$GOOGLE_KMS_BIN" >/dev/null 2>&1 \|\| { echo >&2 "I require $(basename "$GOOGLE_KMS_BIN") but it's not installed. Aborting."; echo >&2 "You can install from: https://github.com/ericnorris/google-kms-x509"; exit 1; }

	[ -z "$GOOGLE_APPLICATION_CREDENTIALS" ] && { echo >&2 "Please set GOOGLE_APPLICATION_CREDENTIALS to point to service account JSON"; exit 1; }

	COUNTRY=${CA_COUNTRY:-"USA"}
	PROVINCE=${CA_PROVINCE:-""}
	ORGANIZATION=${CA_ORGANIZATION:-"Widgets Inc"}

hongkongkiwi / setup_vault.sh

Created July 26, 2020 10:10

Shell script to download and setup vault on a new machine

	#!/usr/bin/env bash

	set -e

	get_arch() {
	local myArch
	unameArch="$(uname -m)";
	case "$unameArch" in
	armhf)
	myArch='arm'

hongkongkiwi / add-ssh-hosts

Created March 13, 2020 05:06

Add keys to known hosts file for a list of domains.

	#!/usr/bin/env bash

	SSH_SCAN_HOSTNAMES=${1:-"${SSH_SCAN_HOSTNAMES}"}
	SSH_SCAN_HOSTNAMES=${SSH_SCAN_HOSTNAMES:-"github.com gitlab.com"}
	SSH_DIR="$HOME/.ssh"

	command -v ssh-keyscan >/dev/null 2>&1 \|\| { echo >&2 "I require ssh-keygen but it's not installed. Aborting."; exit 1; }
	command -v tee >/dev/null 2>&1 \|\| { echo >&2 "I require tee but it's not installed. Aborting."; exit 1; }

	for SSH_SCAN_HOSTNAME in $SSH_SCAN_HOSTNAMES; do

hongkongkiwi / update-mergerfs

Created March 7, 2020 06:26

Updates mergerfs to the latest version

	#!/usr/bin/env bash

	# Read a single char from /dev/tty, prompting with "$*"
	# Note: pressing enter will return a null string. Perhaps a version terminated with X and then remove it in caller?
	# See https://unix.stackexchange.com/a/367880/143394 for dealing with multi-byte, etc.
	function get_keypress {
	local REPLY IFS=
	>/dev/tty printf '%s' "$*"
	[[ $ZSH_VERSION ]] && read -rk1 # Use -u0 to read from STDIN
	# See https://unix.stackexchange.com/q/383197/143394 regarding '\n' -> ''

Andy hongkongkiwi