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.
I build my AMI's using Packer and Ansible.
| { | |
| "AWSTemplateFormatVersion" : "2010-09-09", | |
| "Description" : "Create an EC2 instance, set up Apache, and create Route53 A records", | |
| "Parameters" : { | |
| "KeyName" : { | |
| "Description" : "Name of an existing EC2 KeyPair to enable SSH access to the instances", | |
| "Type" : "String", |
| { | |
| "Description" : "Template to create a US proxy server", | |
| "Parameters" : { | |
| "KeyName" : { | |
| "Description" : "Name of an existing EC2 KeyPair to enable SSH access to the instances", | |
| "Type" : "String" | |
| }, | |
| "VPNServerPort" : { | |
| "Description" : "TCP/IP port of the OpenVPN server", | |
| "Type" : "String", |
| vagrant@precise64:~/cf$ bosh aws bootstrap micro | |
| Deployment set to '/home/vagrant/cf/deployments/micro/micro_bosh.yml' | |
| Deploying new micro BOSH instance `micro/micro_bosh.yml' to `https://10.10.0.6:25555' (type 'yes' to continue): yes | |
| Deploy Micro BOSH | |
| using existing stemcell (00:00:00) | |
| creating VM from ami-9deebef4 (00:01:09) | |
| waiting for the agent (00:01:54) | |
| create disk (00:00:03) | |
| mount disk (00:00:13) |
| $: cf push -n pharris-web-servlet-2-application | |
| Using manifest file /Users/pharris/dev/sources/java-test-applications/web-servlet-2-application/manifest.yml | |
| Creating app web-servlet-2-application in org system / space stream-test as admin... | |
| OK | |
| Creating route pharris-web-servlet-2-application.nebhale.co... | |
| OK | |
| Binding pharris-web-servlet-2-application.nebhale.co to web-servlet-2-application... |
| { | |
| "AWSTemplateFormatVersion" : "2010-09-09", | |
| "Description" : "AWS CloudFormation template to deploy jenkins/nginx.", | |
| "Parameters" : { | |
| "KeyName" : { | |
| "Description" : "Name of an existing EC2 KeyPair to enable SSH access to the instances", | |
| "Type" : "String", |
| """ | |
| Given cyclic list with elements integers. | |
| Find the smallest cycle. | |
| >>> find_smallest_cycle([10, 3, 999, 24, 10, 3, 999, 24, 10, 3]) | |
| [10, 3, 999, 24] | |
| """ | |
| def origin(mylist): | |
| def make_tuple(list_a): | |
| return list(set(map(tuple,list_a))) |
| #!/usr/bin/env python | |
| # -*- coding: utf-8 -*- | |
| class Color(object): | |
| """ | |
| reference from https://gist.github.com/Jossef/0ee20314577925b4027f and modified bit. | |
| """ | |
| def __init__(self, text, **user_styles): |
/Volumes/Untitled.With that volume in place, and with the macOS installer sitting in /Applications/Install\ macOS\ [VERSION].app,
run the following command in your terminal to create a bootable install media (for Sierra):
sudo /Applications/Install\ macOS\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled --applicationpath /Applications/Install\ macOS\ Sierra.app --nointeraction
| 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 |