Jan 26, 2015

by @subicura (Chungsub Kim)

Automatic Docker Service Announcement with registrator and confd

before

after

container is awesome!!but

update some(like nginx) setting manually

Static Configuration

how to update a website running in a docker container

with no downtimeautomatically

Dynamic Configuration

confd

registrator

etcd

CoreOS

Manage local application configuration files using templates and data from etcd or consul

A highly-available key value store for shared configuration and service discovery

Service registry bridge for Docker

Minimal, modern operating system.

Clustered by default Optimized for containers

A highly-available key value store

/services/web/web_1 172.17.8.101:49155

valuekey

directory

*watch / TTL

confd

written in Go

etcd / Consul support

template resource config (TOML)

source template

registrator

automatically register/deregisters services

published ports and metadata

Consul/etcd/SkyDNS2

support TTL

<registry-uri-path>/<service-name>/<service-id> = <ip>:<port>

DEMO

nginx.conf.tmpl

{{ range $dir := lsdir "/services" }}upstream backend_{{ base $dir }} { {{ $custdir := printf "/services/%s/*" $dir }}{{ range getvs $custdir }} server {{.}}; {{ end }}}

server { listen 80; server_name {{ base $dir }}.sample.com;

location / { include /etc/nginx/proxy_params; proxy_pass http://backend_{{base $dir}}; }}{{end}}

Link

• http://coreos.com

• https://github.com/kelseyhightower/confd

• https://github.com/progrium/registrator

• https://github.com/subicura/nginx-confd

THANK YOU