CONSTRUINDO SITES MAIS INTELIGENTES

COM GALEB

Fernando Carologlobo.com

Galeb?

Roteador/proxy HTTP/1.1

Inspiração: Heroku, App Engine

1990: 1 site = 1 servidor

2000: balanceador de carga

1 site = 1 IP = vários servidores

Vários sites?

Virtual hosts

Servidores precisam ser iguais

Mudança = reload, restart

HTTP

Roteamento HTTP

Virtual host = pool de servidores

Mudanças sem interrupção

galeb

one.example other.example

192.0.2.10

*.example

Galeb trabalha na camada 7

Redundância via camada 4

(hardware, ELB, etc)

Features

Políticas de balanceamento

round robin

least conn

IP hash

random

Métricas via statsd+Graphite [1,2]

conexões ativas

requisições/host

status code (2xx, 3xx, 4xx, 5xx)

tempo de resposta

Casos de uso

ambientes de teste/IC

red/black deploy

PaaS

Como funciona?

Primeira tentativa: hipache [3]

Node.js + node-http-proxy

Single-threaded

Versão atual: Galeb Router

Baseado em Vert.x [4]

Java

Multi-threaded

Não bloqueante

Operação em cluster

masterless

sincronismo via event bus

Escalabilidade horizontal

API RESTful

Reflexos na próxima requisição

Roadmap

–Eric S. Raymond

“Every good work of software starts by scratching a

developer's personal itch.”

Substituir o hardware

Roteamento por URI

vários back-ends para um site

um back-end para vários sites

galeb

one.example/blog one.example/*

192.0.2.10

one.example

Integração com Tsuru

Websockets

Tratamento de cookies

controle de sessão

teste A/B

Health-check ativo

Controle de acesso

HTTP/2.0

Demonstração

Onde?

galeb.io

github.com/globocom/galeb/

Use e contribua

Perguntas?

Este trabalho está licenciado com uma Licença Creative Commons Atribuição-NãoComercial-CompartilhaIgual 4.0 Internacional

OBRIGADO

Fernando Carolocarolo@corp.globo.com

Links:

[1] https://codeascraft.com/2011/02/15/measure-anything-measure-everything/

[2] http://graphite.wikidot.com/

[3] https://github.com/hipache/hipache/

[4] http://vertx.io/

Créditos:

Slide 2: paraflyer/Flickr, https://www.flickr.com/photos/paraflyer/5803595153

Slide 4: Simon Bisson/Flickr, https://www.flickr.com/photos/sbisson/298160250

Slide 5: Shannan Muskopf/Flickr, https://www.flickr.com/photos/40964293@N07/3821896226

Slide 8: Stephan Mosel/Flickr, https://www.flickr.com/photos/moe/38241195

Slide 12: Norlando Pobre/Flickr, https://www.flickr.com/photos/npobre/2601582256

Slide16: Darryl Braaten/Flickr, https://www.flickr.com/photos/dbraaten/323401934

Slide 18: Andrew Magill/Flickr, https://www.flickr.com/photos/amagill/87559968

Slide 20: Michael Allen Smith/Flickr, https://www.flickr.com/photos/digitalcolony/8489709854

Slide 21: Alika Seu/Flickr, https://www.flickr.com/photos/28863939@N04/5478630263

Slide 22: Alan Stark/Flickr, https://www.flickr.com/photos/squeaks2569/8114399667

Slide 25: mrhayata/Flickr, https://www.flickr.com/photos/mrhayata/5260658138

Slide 27: jerry john/Flickr, https://www.flickr.com/photos/jerryjohn/63351388

Slide 30: Toshihiro Gamo/Flickr, https://www.flickr.com/photos/dakiny/8299559189

Slide 31: Wes Peck/Flickr, https://www.flickr.com/photos/wespeck/4960579336

Slide 34: Rede Globo/Divulgação

Slide 35: velkr0/Flickr, https://www.flickr.com/photos/velkr0/4014689

Slide 36: Seattle Municipal Archives/Flickr, https://www.flickr.com/photos/seattlemunicipalarchives/2692491283

Slide 37: Sebastian Niedlich/Flickr, https://www.flickr.com/photos/42311564@N00/3577957474

Slide 38: Ged Carroll/Flickr, https://www.flickr.com/photos/renaissancechambara/5084900444

Slide 39: Matthias Ripp/Flickr, https://www.flickr.com/photos/56218409@N03/15371262455

Todas as imagens do Flickr utilizadas através de uma licença Creative Commons