Ruan Bekker ruanbekker

$ cat test.tmpl
Hi ${USER}, this is a ${ENVIRONMENT} environment

USER=ruan ENVIRONMENT=test envsubst '${USER},${ENVIRONMENT}' < test.tmpl
Hi ruan, this is a test environment

Loki absent over time workaround

This is a workaround that works for my use-case when log content are not present withing a minute, using AWS Lambda and AWS CloudWatch Events

Setup:

AWS CloudWatch event triggers the Lambda every minute
Lambda uses the Loki API to search for logs, if nothing has been found it retries if still fails, it alerts
It alerts to slack.

Userdata:

$ cat userdata.txt
#!/bin/bash
CLUSTER_NAME="aws-qa-ecs"
ENVIRONMENT_NAME="qa"
INSTANCE_LIFECYCLE="spot"
MY_HOSTNAME="$(curl -s http://169.254.169.254/latest/meta-data/local-hostname)"
INSTANCE_ID="$(curl -s http://instance-data/latest/meta-data/instance-id)"

OnDemand:

$ curl -s https://raw.githubusercontent.com/powdahound/ec2instances.info/master/www/instances.json | jq -r '.[] | select(.instance_type == "t2.micro") | .pricing."eu-west-1".linux.ondemand'
0.0126

Spot:

Provision a VM with Multipass:

$ multipass shell
$ lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 18.04.4 LTS
Release:	18.04
Codename:	bionic

Update and install cpu-checker to see if we can use hardware virtualization:

$ apt update && apt upgrade -y
$ apt install cpu-checker -y

Test with kvm-ok:

SSH2 format will look like this:

---- BEGIN SSH2 PUBLIC KEY ----
Comment: "rsa-key-20201005"
AAAA
....
abcdef==
---- END SSH2 PUBLIC KEY ----

	version: "3.7"

	services:
	# https://docs.gitea.io/en-us/install-with-docker/
	gitea:
	image: gitea/gitea:1.12.4
	# https://hub.docker.com/r/gitea/gitea/tags
	container_name: gitea
	environment:
	- APP_NAME=Gitea

	<!DOCTYPE html>
	<html lang="en-us">
	<head>
	<meta charset="utf-8">
	<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" crossorigin="anonymous">
	<script src="https://code.jquery.com/jquery-3.1.1.min.js" crossorigin="anonymous"></script>
	<title>Sample Page</title>
	</head>
	<body>
	<div class="container-fluid">

	#!/bin/bash
	AWS_ACCOUNT="dev"
	CLUSTER_NAME="aws-qa-ecs"
	ENVIRONMENT_NAME="qa"
	NODE_EXPORTER_VERSION="1.0.1"
	NODE_EXPORTER_USER="node_exporter"
	MY_HOSTNAME="$(curl -s http://169.254.169.254/latest/meta-data/local-hostname)"
	INSTANCE_ID="$(curl -s http://instance-data/latest/meta-data/instance-id)"
	INSTANCE_LIFECYCLE="$(curl -s http://169.254.169.254/latest/meta-data/instance-life-cycle)"
	REGION="$(curl -s http://instance-data/latest/meta-data/placement/availability-zone \| rev \| cut -c 2- \| rev)"