roustem

		"B5AppSubnet1": {
			"Type": "AWS::EC2::Subnet",
			"Properties": {
				"CidrBlock": { "Fn::Select" : ["0", { "Fn::FindInMap" : [ "SubnetCidr", { "Ref" : "Env" }, "b5app"] }] },
				"AvailabilityZone": { "Fn::Select" : [ "0", { "Fn::GetAZs" : "" } ]},
				"VpcId": { "Ref": "Vpc" },
				"Tags": [
					{ "Key" : "Application", "Value" : "B5" },
					{ "Key" : "env", "Value": { "Ref" : "Env" } },
					{ "Key" : "Name", "Value": { "Fn::Join" : ["-", [ {"Ref" : "Env"}, "b5", "b5app-subnet1"]] } }

roustem

// Run on https://start.1password.com to get sjcl


function timeSJCL_SHA256(iterations, value) {
    let timerName = "SJCL SHA-256 (" + value.length + " bytes, " + iterations + " iterations)";
    console.time(timerName);
    for (let i = 0; i < iterations; i++) {
        sjcl.hash.sha256.hash(value);
    }
    console.timeEnd(timerName);

roustem

package main

import (
	_ "expvar"
	"io"
	"log"
	"net/http"
	"strings"
)

roustem

Keybase proof

I hereby claim:

• I am roustem on github.
• I am roustem (https://keybase.io/roustem) on keybase.
• I have a public key ASAydHUtI9pDZiM5XGGifDoFY_ZPnoLcdTyIn4KCoRiMtAo

To claim this, I am signing this object:

roustem

package main

import "fmt"

func test() interface{} {
	return 123
}

func main() {
	// no panic

roustem

package main

import "fmt"

type myError struct {
	Message string
}

func (m *myError) Error() string {
	return "MyError: " + m.Message

roustem

package main

import "fmt"

type MyError struct {
	Message string
}

func (m *MyError) Error() string {
	return m.Message

roustem

WebCrypto APIs:

subtle.generateKey
subtle.exportKey
subtle.importKey
subtle.deriveBits
subtle.encrypt
subtle.decrypt
subtle.digest

roustem

A quick note on how I'm currently handling Blue/Green or A/B deployments with Terraform and AWS EC2 Auto Scaling.

In my particular use case, I want to be able to inspect an AMI deployment manually before disabling the previous deployment.

Hopefully someone finds this useful, and if you have and feedback please leave a comment or email me.

Overview

I build my AMI's using Packer and Ansible.

roustem

--
-- This example shows how bad MySQL is when handling foreign key locks.
-- Deadlock happens when multiple transactions are inserting child records 
-- pointing to the same parent and then try to update the parent record.
-- 
-- The solution is to always try to update the parent record first 
-- but it could be hard to track the when database schema is more complex.
--
-- Based on: https://bugs.mysql.com/bug.php?id=48652
--