Sai Kothapalle seeker815

AWS Golang SDK examples

An Ansible summary

Jon Warbrick, July 2014, V3.2 (for Ansible 1.7)

Configuration file

First one found from of

WARNING

May contain out of date information. Check the comments below!

The list of actions listed below was taken mostly from Book Of Zeus with minor modifications and did the job well for Ubuntu version, which was available at that moment (May 2016). This gist was created for internal use and was never meant to be discovered by the web, although Google managed to find and index this page, which was a great surprise for me. Please check the original source for the updated information (links are provided in most of the sections), and read the comments below: they provide more details about the usage experience.

System Updates

http://bookofzeus.com/harden-ubuntu/initial-setup/system-updates/

Keeping the system updated is vital before starting anything on your system. This will prevent people to use known vulnerabilities to enter in your system.

Kafka Topics

List existing topics

bin/kafka-topics.sh --zookeeper localhost:2181 --list

Purge a topic

bin/kafka-topics.sh --zookeeper localhost:2181 --alter --topic mytopic --config retention.ms=1000

... wait a minute ...

bin/kafka-topics.sh --zookeeper localhost:2181 --alter --topic mytopic --delete-config retention.ms

Assuming device /dev/xvdd being mounted to /data.

sudo mkfs -t ext4 /dev/xvdd
sudo mkdir /data
sudo mount /dev/xvdd /data

Add line to /etc/fstab to mount every boot:

sudo vi /etc/fstab

/dev/xvdd /data ext4 defaults,nofail 0 2

Docker - How to cleanup (unused) resources

Once in a while, you may need to cleanup resources (containers, volumes, images, networks) ...

delete volumes

// see: https://github.com/chadoe/docker-cleanup-volumes

$ docker volume rm $(docker volume ls -qf dangling=true)

$ docker volume ls -qf dangling=true | xargs -r docker volume rm

	{
	"Version": "2012-10-17",
	"Statement": [
	{
	"Action": "sts:AssumeRole",
	"Principal": {
	"Service": "ec2.amazonaws.com"
	},
	"Effect": "Allow",
	"Sid": ""

	# Add this snippet to the top of your playbook.
	# It will install python2 if missing (but checks first so no expensive repeated apt updates)
	# [email protected]

	- hosts: all
	gather_facts: False

	tasks:
	- name: install python 2
	raw: test -e /usr/bin/python \|\| (apt -y update && apt install -y python-minimal)

	---

	hosts: all
	tasks:
	- name: add github ssh key
	copy: >
	src=files/id_rsa.github
	dest=/root/.ssh/id_rsa.github
	owner=root
	group=root

	# Basics

	module Chef
	class Resource
	attr_reader :name

	def initialize name
	@name = name
	end