Download - Puppet at the centre of everything by David Mytton

Puppet at the centre of everything

David Mytton

Woop Japan!

Server Density Architecture

•100 servers - Ubuntu 12.04



•50% virtual



•Nginx, Python, MongoDB

•50% virtual



•Nginx, Python, MongoDB

•25TB data per month

•50% virtual

Use cases

• Config

Use cases

• Config

• Failover

Use cases

• Config

• Code deploys

• Failover

Use cases

• Config

• Code deploys

• System updates

• Failover

• Base manifest

Config

• Base manifest

Config

• Sub manifests

• base

• softlayer

• softlayer-dedicated

• rackspace

• ...

Failover

• /etc/hosts

<%= metrics2IP %> alerts.honshuu.prod

audit.honshuu.prod auth.honshuu.prod

cloud.honshuu.prod datastore.honshuu.prod

inventory.honshuu.prod ...

Failover

• /etc/hosts

108.168.254.33 puppet

Expected

Dealing with outages

Really test your vendors


Simulations


• Commit

Code deploys

• Commit

Code deploys

• Build

• Commit

Code deploys

• Build

• Deploy

/opt/puppet/bin/mco puppetd runonce -I <host>

• Commit

Code deploys

• Build

• Deploy

• Puppet run

Code deploys

Advantages

APIs

Code deploys

Advantages

APIs

Already there

Code deploys

Advantages

APIs

Already there

System facts

Code deploys

Disadvantages

Slow

Code deploys

Disadvantages

Slow

Puppet run already

Code deploys

Disadvantages

Slow

Puppet run already

Eventually consistent

System updates

• Bash script

System updates

• Bash script

• Remote commands

System updates

• Bash script

• Remote commands

• Notifications

System updates

• Bash script

• Remote commands

• Notifications

• Canaries

•Build master (buildbot): VM x2 CPU 2.0Ghz, 2GB

RAM – $89/m

•Build slave (buildbot): VM x1 CPU 2.0Ghz, 1GB

RAM

– $40/m

•Staging load balancer: VM x1 CPU 2.0Ghz, 1GB

RAM – $40/m

•Staging server 1: VM x2 CPU 2.0Ghz, 8GB RAM

– $165/m

•Staging server 2: VM x1 CPU 2.0Ghz, 2GB RAM

– $50/m

•Puppet master: VM x2 CPU 2.0Ghz, 2GB RAM

– $89/m

•Total: $473/m

Colo experiment

Colo experiment

•Dell 1U R415

•x2 8C AMD 2.8Ghz

•32GB RAM

Colo experiment

•Dell 1U R415

•x2 8C AMD 2.8Ghz

•32GB RAM

•Dual PSU, NIC

Colo experiment

•Dell 1U R415

•x2 8C AMD 2.8Ghz

•32GB RAM

•Dual PSU, NIC

•x4 1TB SATA hot swappable

Dedicated?

Dedicated?

•Hardware replacement

Dedicated?


•Managed/support

Dedicated?


•Managed/support

•Networking

Colo?

•Hardware spec/value

Colo?


•Total cost

Colo?


•Total cost

•Internal skills?

Colo?


•Total cost

•Internal skills?

•More fun?!

Colo: Power

•£300-350/kWh/m

•4.5A = £520/m

•9A = £900/m

David Mytton

[email protected]

@davidmytton

Woop Japan!

blog.serverdensity.com