Consul Plugin for Caddy

Forked from https://github.com/brimstone/caddy-consul

Installation

1. Get the source

go get github.com/krishamoud/caddy-consul

2. Get the Caddy source

go get github.com/mholt/caddy/caddy

3. Add the plugin

// github.com/mholt/caddy/caddy/caddymain/run.go
package caddymain

import (
	"errors"
	"flag"
	"fmt"
	"io/ioutil"
	"log"
	"os"
	"runtime"
	"strconv"
	"strings"

	"gopkg.in/natefinch/lumberjack.v2"

	"github.com/xenolf/lego/acme"

	"github.com/mholt/caddy"
	// plug in the HTTP server type
	_ "github.com/mholt/caddy/caddyhttp"

	"github.com/mholt/caddy/caddytls"
	// This is where other plugins get plugged in (imported)
	_ "github.com/krishamoud/caddy-consul" // ADD THIS LINE
)

4. Build Caddy

cd github.com/mholt/caddy/caddy
go get github.com/caddyserver/builds
go run build.go

5. Set CONSUL ENV variable

This tells consul where to connect

export CONSUL=http://10.0.0.1:8500

6. Set CADDYFILE_PATH env

This tells caddy where to look for the Caddyfile.tmpl template

export CADDYFILE_PATH=/path/to/Caddyfile.tmpl

7. Run Caddy

Either add your newly built binary to your $PATH or just run ./caddy from where you built the application.

Example Caddyfile.tmpl

{{range $domain, $services := .}}{{$domain}}.example.com {
  tls /etc/ssl/cert.crt /etc/ssl/star_example_com.key
  gzip
  proxy / {
    policy ip_hash
    {{range $key, $service := $services}}upstream {{.Address}}:{{.ServicePort}}
    {{end}}
  }
}
{{end}}

The above will output something like this:

dashboard.example.com {
  tls /etc/ssl/cert.crt /etc/ssl/star_example_com.key
  gzip
  proxy / {
    policy ip_hash
    upstream 172.31.17.252:32835

  }
}
league.example.com {
  tls /etc/ssl/cert.crt /etc/ssl/star_example_com.key
  gzip
  proxy / {
    policy ip_hash
    upstream 172.31.17.252:32834
    upstream 172.31.58.45:32837

  }
}
todos.example.com {
  tls /etc/ssl/cert.crt /etc/ssl/star_example_com.key
  gzip
  proxy / {
    policy ip_hash
    upstream 172.31.17.252:32836

  }
}

TODOS:

1. Tests
2. Refactoring