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Ruan Bekker ruanbekker

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@ruanbekker
ruanbekker / lambda_zip_package_python.md
Created February 22, 2021 16:24
Update AWS Lambda Function with Dependencies in Python using a Deployment Package

Change into our working directory:

$ mkdir -p myworkdir/src 
$ cd myworkdir

Create a virtual env:

@ruanbekker
ruanbekker / terraform_aws_buildspec.yml
Created February 19, 2021 04:45
Install Terraform on AWS CodeBuild
version: 0.2
env:
variables:
TERRAFORM_VERSION: "0.14.7"
phases:
install:
commands:
- curl -o "terraform.zip" https://releases.hashicorp.com/terraform/"$TERRAFORM_VERSION"/terraform_"$TERRAFORM_VERSION"_linux_amd64.zip
@ruanbekker
ruanbekker / initd_script.sh
Last active February 10, 2021 16:03
Amazon Linux Startup Script Template
#!/usr/bin/env bash
# inspired by:
# https://unix.stackexchange.com/a/193568
# source function library
. /etc/init.d/functions
# application name
APP="node_exporter"
DESC="Node Exporter"
@ruanbekker
ruanbekker / terraform_output_aws_vpc.md
Created February 9, 2021 14:11
Output values with Terraform

provider.tf:

$ cat provider.tf
provider "aws" {
  version = "~> 2.0"
  region  = "eu-west-1"
  profile = "dev"
  shared_credentials_file = "~/.aws/credentials"
}
@ruanbekker
ruanbekker / pushover_notifiers_examples.md
Created February 7, 2021 12:05
Pushover Notifiers Examples

In BASH:

# usage: ./pushover-notify home-pc "homepc notification"
#!/bin/bash
APP_TOKEN='x'
USER_TOKEN='x'
TITLE="$1"
MESSAGE="$2"
curl 'https://api.pushover.net/1/messages.json' -X POST -d "token=$APP_TOKEN&user=$USER_TOKEN&message=\"$MESSAGE\"&title=$TITLE"
@ruanbekker
ruanbekker / random_strings_or_numbers.md
Last active February 1, 2021 14:42
Bash: Return random number or string from array or range

Return random string from array:

#!/usr/bin/env bash
subnets[0]="subnet1"
subnets[1]="subnet2"
subnets[2]="subnet3"

size=${#subnets[@]}
index=$(($RANDOM % $size))
@ruanbekker
ruanbekker / grafana_cloud_agent.md
Created January 14, 2021 13:40
Setup Grafana Cloud Agent for Linux

Download:

curl -O -L "https://github.com/grafana/agent/releases/latest/download/agent-linux-amd64.zip";
unzip "agent-linux-amd64.zip";
chmod a+x "agent-linux-amd64";

Move to place:

@ruanbekker
ruanbekker / 01_unit_tests_with_flask.md
Created January 11, 2021 13:41
Python Flask Unit Tests 
$ docker build -t local:flask .
$ docker run -it -p 8080:8080 local:flask

$ python app_test.py
.
----------------------------------------------------------------------
Ran 1 test in 0.000s
@ruanbekker
ruanbekker / flask_prometheus.md
Created January 11, 2021 13:30
Python Flask with Prometheus Basic Example 
$ curl http://localhost:5000/metrics
# HELP python_gc_objects_collected_total Objects collected during gc
# TYPE python_gc_objects_collected_total counter
python_gc_objects_collected_total{generation="0"} 317.0
python_gc_objects_collected_total{generation="1"} 71.0
python_gc_objects_collected_total{generation="2"} 0.0
# HELP python_gc_objects_uncollectable_total Uncollectable object found during GC
# TYPE python_gc_objects_uncollectable_total counter
python_gc_objects_uncollectable_total{generation="0"} 0.0
@ruanbekker
ruanbekker / flask_timing_requests.py
Created January 11, 2021 13:13
Timing requests with Python Flask
# source: https://opensource.com/article/18/4/metrics-monitoring-and-python
from flask import request
import csv
import time
def start_timer():
request.start_time = time.time()
def stop_timer(response):
# convert this into milliseconds for statsd