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Developer Workflow for Apps Running in Kubernetes

Assumptions:

• CD Pipeline includes: Git => Jenkins => CI (w/ Static Code Analysis, SAST, etc.) => Docker Registry => Spinnaker
• CD Pipeline design should be optimized for Developer Experience and Overall Speed of Deployment to the target lifecycle, without compromising on Quality or Security

Broad Brush Strokes:

• In an ideal world, a developer should be able to perform "Write Code, Build Code, Test Code" loop on their local machine

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#!/bin/bash

curl https://pricing.us-east-1.amazonaws.com/offers/v1.0/aws/AmazonEC2/current/index.json | jq -r '.products[].attributes["instanceType"]' | sort -u | grep '\.'

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#!/bin/bash
cd ~
curl -O https://storage.googleapis.com/us-east-4-anand-files/misc-files/step.sh
chmod 755 ~/step.sh

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-- minishift version: v1.12.0+daa0943
-- Starting profile 'minishift'
Found binary path at /usr/local/bin/minishift
Launching plugin server for driver virtualbox
Plugin server listening at address 127.0.0.1:56139
() Calling .GetVersion
Using API Version  1
() Calling .SetConfigRaw
() Calling .GetMachineName
(minishift) Calling .GetState

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# Steps to build and install tmux from source on Ubuntu.
# Takes < 25 seconds on EC2 env [even on a low-end config instance].
VERSION=2.5
sudo apt-get -y remove tmux
sudo apt-get -y install wget tar libevent-dev libncurses-dev
wget https://github.com/tmux/tmux/releases/download/${VERSION}/tmux-${VERSION}.tar.gz
tar xf tmux-${VERSION}.tar.gz
rm -f tmux-${VERSION}.tar.gz
cd tmux-${VERSION}
./configure

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Latency Comparison Numbers
--------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

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# These commands will ONLY work if you are using GNU 'du', 'find' and 'sort' commands
# Top 10 files by recursively diving inside the current folder (skip .git and .svn folders)
find . -type d \( -iregex ".*git" -o -iregex ".*svn" \) -prune -o -type f -exec du -Sh {} + | sort -rh | head -n 10

# Top 10 files by recursively diving inside the current folder (without skipping any folders)
find . -type f -exec du -Sh {} + | sort -rh | head -n 10

# Top 10 directories by recursively diving inside the current folder (skip .git and .svn folders)
du -Sh --exclude=".git" --exclude=".svn" | sort -rh | head -n 10

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[Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, Florida, Georgia, Hawaii, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin, Wyoming]

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Pseudocode:

Y = Base64URLEncode(Header) + ‘.’ + Base64URLEncode(Payload)
JWT = Y + ‘.’ + Base64URLEncode(HMACSHA256(Y))

The steps called out here should work on a Mac as well. The only thing that might be different is the sed command used below. Instead of using -E, you will have to use -r to run sed with extended regular expression support

Use data from this tutorial:

scotch.io

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#!/usr/bin/perl -w
#
$num_of_args = $#ARGV + 1;
if ($num_of_args != 1) {
  print "Usage: ns2date.pl <epochtime in nanoseconds>\n";
  exit;
}

$ns = $ARGV[0];
print scalar localtime($ns / 1000000000) . "\n";