alwaysastudent

ANNOUNCEMENT

I have moved this over to the Tech Interview Cheat Sheet Repo and has been expanded and even has code challenges you can run and practice against!






\

alwaysastudent

Moved to git repository: https://github.com/denji/golang-tls

Generate private key (.key)

# Key considerations for algorithm "RSA" ≥ 2048-bit
openssl genrsa -out server.key 2048

# Key considerations for algorithm "ECDSA" ≥ secp384r1
# List ECDSA the supported curves (openssl ecparam -list_curves)

alwaysastudent

Ansible variable precedence

Source: http://docs.ansible.com/ansible/latest/playbooks_variables.html#variable-precedence-where-should-i-put-a-variable

From least to most important

• role defaults
• inventory file or script group vars
• inventory group_vars/all
• playbook group_vars/all

alwaysastudent

Processing JSON using jq

jq is useful to slice, filter, map and transform structured json data.

Installing jq

On Mac OS

brew install jq

alwaysastudent

#!/bin/bash
#
BASE=/tmp
PID=$BASE/app.pid
LOG=$BASE/app.log
ERROR=$BASE/app-error.log

PORT=11211
LISTEN_IP='0.0.0.0'
MEM_SIZE=4

alwaysastudent

  // For all the confusing Prometheus configuration and
  // regular expressions,
  // explained in examples.


  // Remember, there are default values for each item if it's missing.
  // regex is (.*),
  // replacement is $1,
  // separator is ;
  // ,and action is replace 

alwaysastudent

An Ansible summary

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

Configuration file

intro_configuration.html

First one found from of

alwaysastudent

Hey! I saw this has been indexed by the search engines. It is a first draft of a post I ended up publishing on my blog at: Scaling PostgreSQL With Pgpool and PgBouncer

Thanks for stopping by!

PostgreSQL and Pgpool Architecture

alwaysastudent

#!/bin/bash -e

# Setup a Root CA in vault
# Generate and sign an Intermediate cert
#
# Requires:
# * A running vault server already initialzed and unsealed
# * Environment variable VAULT_TOKEN is set
# * vault cli (https://www.vaultproject.io)
# * httpie (https://github.com/jkbrzt/httpie)

alwaysastudent

Branching

Quick Legend

Description, Instructions, Notes

Instance	Branch