tasdikrahman

Go (Golang) Standard Library Interfaces (Selected)

This is not an exhaustive list of all interfaces in Go's standard library. I only list those I think are important. Interfaces defined in frequently used packages (like io, fmt) are included. Interfaces that have significant importance are also included.

All of the following information is based on go version go1.8.3 darwin/amd64.

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# ruby 2.2.2
# activerecord 4.2.3
# aasm 4.2.0

require 'active_record'
require 'aasm'

# Setup a mock AR table
ActiveRecord::Migration.verbose = false
ActiveRecord::Base.establish_connection(:adapter => "sqlite3", :database => ":memory:")

tasdikrahman

Setting up and installing rbenv, ruby-build, rubies, rbenv-gemset, and bundler

This guide enables you to install (ruby-build) and use (rbenv) multiple versions of ruby, isolate project gems (gemsets and/or bundler), and automatically use appropriate combinations of rubies and gems.

TL;DR Demo

# Ensure system is in ship-shape.

aptitude install git zsh libssl-dev zlib1g-dev libreadline-dev libyaml-dev

tasdikrahman

Effective Engineer - Notes

• By Edmond Lau
• Highly Recommended 👍
• http://www.theeffectiveengineer.com/

What's an Effective Engineer?

• They are the people who get things done. Effective Engineers produce results.

Adopt the Right Mindsets

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Ruby and Python profilers

CPU profilers

Python

• cProfile
• https://github.com/bdarnell/plop (blog post)
• https://github.com/rkern/line_profiler
• https://github.com/uber/pyflame (blog post)

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Kubernetes The Hard Way Notes

Reference: kelseyhightower/kubernetes-the-hard-way

Step 1: Cloud Infrastructure Provisioning - Google Cloud Platform

Reference: step 1

Verification:

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from __future__ import print_function

import os
import boto3
from datetime import datetime, timedelta
from dateutil.parser import parse

THRESHOLD = int(os.getenv('threshold_days', 30))
ENABLE_DELETE = os.getenv('enable_delete', False)
REGION = os.getenv('region', 'us-east-1')

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Building Docker image with Packer and provisioning with Ansible

Overview

Packer

• Packer is used to build image from a base image, perform provisions and store (commit) the final image.

• We use provisioners and Packer templates to do the actual work to create the final image.

• We use Ansible for provisioning.

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Requirements

• no upfront installation/agents on remote/slave machines - ssh should be enough
• application components should use third-party software, e.g. HDFS, Spark's cluster, deployed separately
• configuration templating
• environment requires/asserts, i.e. we need a JVM in a given version before doing deployment
• deployment process run from Jenkins

Solution

tasdikrahman

Requirements

• no upfront installation/agents on remote/slave machines - ssh should be enough
• application components should use third-party software, e.g. HDFS, Spark's cluster, deployed separately
• configuration templating
• environment requires/asserts, i.e. we need a JVM in a given version before doing deployment
• deployment process run from Jenkins

Solution