xman1980

#!/usr/bin/env python

from cm_api.api_client import ApiResource

def main(args):
    cm_host = get(args, 1, "localhost")
    cm_user = get(args, 2, "admin")
    cm_pass = get(args, 3, "admin")

    api = ApiResource(cm_host, username=cm_user, password=cm_pass)

xman1980

#!/bin/sh

# install into /etc/ppp/ip-down
# chmod a+x /etc/ppp/ip-down

source /etc/ppp/ip.config

case "${IPREMOTE}" in
  ${MY_IPREMOTE})
    /sbin/route delete ${MY_ROUTE} -interface ${IFNAME}

xman1980

#!/bin/bash

# Minimum TODOs on a per job basis:
# 1. define name, application jar path, main class, queue and log4j-yarn.properties path
# 2. remove properties not applicable to your Spark version (Spark 1.x vs. Spark 2.x)
# 3. tweak num_executors, executor_memory (+ overhead), and backpressure settings

# the two most important settings:
num_executors=6
executor_memory=3g

xman1980

Kafka Topics

List existing topics

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

Describe a topic

bin/kafka-topics.sh --zookeeper localhost:2181 --describe --topic mytopic

Purge a topic

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

... wait a minute ...

xman1980

Tabs and Windows

Function	Shortcut
Fullscreen	⌘+ Enter
Previous Tab	⌘+ Left Arrow
Next Tab	⌘+ Right Arrow
Go to Tab	⌘ + Number
Go to Window	⌘ + Option + Number
Go to Split Pane by Direction	⌘ + Option + Arrow

xman1980

#!/bin/bash
# Simple install script for stock RedHat/CentOS 7.x
# Allows yum update to pull security & other fixes automatically from MongoDB.com's repos
# (versus ancient packages in Red Hat/Cent repos)

# To completely purge all remnants of Mongo (repo conf, rpms, yum cache, DB files, kernel tweaks:
#   sudo service mongod stop ; sudo rm -rf /etc/yum.repos.d/mongo* ; sudo rm -rf /var/lib/mongo/* ; sudo sed -i.`date +%Y-%m-%d_%H-%M-%S`.bak '/^#.*$/!d' /etc/rc.d/rc.local ; sudo rm -rf /var/cach/yum ; sudo yum -y clean all ; sudo yum -y remove mongodb* 

# Sanity check - are we on a RH family distro?
[ -f "/etc/redhat-release" ] || { echo -e "This script requires RedHat or CentOS. Quitting. \n"; exit 1 ;}

xman1980

#!/bin/bash

# dependencies: curl

# example usage: cf_ban 192.168.0.1

# append cloudflare email address and API token:
USER=
TOKEN=

xman1980

#!/bin/bash
# Install Spark on CentOS 7
yum install java -y
java -version

yum install wget -y
wget http://downloads.typesafe.com/scala/2.11.7/scala-2.11.7.tgz
tar xvf scala-2.11.7.tgz
sudo mv scala-2.11.7 /usr/lib
sudo ln -s /usr/lib/scala-2.11.7 /usr/lib/scala

xman1980

AWS S3 bucket and IAM policy recipes

• Anonymous GET access
• Anonymous GET access - match HTTP referrer
• Full access for specific IAM user/role
• GET/PUT/DELETE access to specific path within a bucket
• Restricted LIST & PUT/DELETE access to specific path within a bucket
• Full access (and S3 console) for specific IAM users
• Reference

Anonymous GET access

xman1980

#!/bin/bash

# Do not run if removal already in progress.
pgrep "docker rm" && exit 0

# Remove Dead and Exited containers.
docker rm $(docker ps -a | grep "Dead\|Exited" | awk '{print $1}'); true

# It will fail to remove images currently in use.
docker rmi $(docker images -qf dangling=true); true