larsar

# The VirtualBox documentation[1] for how to install guest additions 
# for Linux on a virtual host is somewhat messy. So here is what 
# I did to make it work.

# Install the packages required
yum update
yum install gcc kernel-devel make

reboot

joemiller

#!/bin/bash


if [ -z "$1" ]; then
        echo
        echo usage: $0 network-interface
        echo
        echo e.g. $0 eth0
        echo
        echo shows packets-per-second

tristanfisher

Working with ansible-vault

---

I've been using a lot of Ansible lately and while almost everything has been great, finding a clean way to implement ansible-vault wasn't immediately apparent.

What I decided on was the following: put your secret information into a vars file, reference that vars file from your task, and encrypt the whole vars file using ansible-vault encrypt.

Let's use an example: You're writing an Ansible role and want to encrypt the spoiler for the movie Aliens.

andershedstrom

---
- hosts: app
  remote_user: vagrant
  sudo: yes
  vars:
    download_url: http://download.oracle.com/otn-pub/java/jdk/8u5-b13/jdk-8u5-linux-x64.tar.gz
    download_folder: /opt
    java_name: "{{download_folder}}/jdk1.8.0_05"
    java_archive: "{{download_folder}}/jdk-8u5-linux-x64.tar.gz"

micw

#!/bin/bash

set -e

if [ $# -eq 0 ]; then
  echo "USAGE: $0 plugin1 plugin2 ..."
  exit 1
fi

plugin_dir=/var/lib/jenkins/plugins

cecil

---
- hosts: hou-dc-repo
  tasks:
    - name: confirm apache createrepo rsync installed
      yum: name={{item}} state=installed
      with_items:
         - httpd
         - createrepo
         - rsync
    - name: create dirs for centos6 and EPEL repo

prateek

Offline Python Package Install Notes

Two common cases which make the install of Python packages harder due to networking issues are: a) Install behind a Proxy b) Install without access to the internet

(a) Install behind a Proxy

In the case where the target machine connects to the internet over a network proxy, export the following environment vars, as appropriate - http_proxy and https_proxy. Eg:

jlebon

This gist is mostly based on the dnsmasq appendix from the openshift-training repo. However, I updated it and included fixes for the many gotchas I found along the way.

This is useful for folks who want to set up a DNS service as part of the cluster itself, either because they cannot easily change their DNS setup outside of the cluster, or just because they want to keep the cluster setup self-contained.

gg7

#!/bin/bash

set -o errexit
set -o nounset
set -o pipefail

docker inspect $(docker ps -q) \
| jq -c '.[] | {name: .["Name"], ips: .["NetworkSettings"]["Networks"] | map(.IPAddress)} | [.name, .ips]'

belminf

# Both are limited to HVM-based 64-bit AMIs backed by EBS

# Red Hat's latest GA images
alias ami_rhel="aws ec2 describe-images \
--filters \
'Name=root-device-type,Values=ebs' \
'Name=architecture,Values=x86_64' \
'Name=virtualization-type,Values=hvm' \
'Name=name,Values=*GA*' \
--owners 309956199498 \