├── README.md
├── demo.yml
├── myapp.yml
├── consul-server.yml
├── registrator.yml
└── assembler.go


/README.md:
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1 | 
2 | ```
3 | $ go run assembler.go demo.yml
4 | ```
5 | 


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/demo.yml:
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 1 | services:
 2 |   - consul-server
 3 |   - registrator
 4 |   - myapp
 5 | config:
 6 |   hostip: 10.0.2.15
 7 |   debug: true
 8 |   foo:
 9 |     bar: baz
10 | 


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/myapp.yml:
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1 | image: myapp
2 | container_name: app
3 | dns: {{ $dns }}
4 | environment:
5 |   - FOOBAR={{ $foo.bar }}
6 | {{ if .debug }}
7 |   - DEBUG=true
8 | {{ end }}
9 | 


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/consul-server.yml:
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1 | image: gliderlabs/consul-server
2 | container_name: consul-server
3 | net: host
4 | command: -advertise {{ $hostip }}
5 | extra:
6 |   dns: {{ $hostip }}
7 | 


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/registrator.yml:
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1 | image: gliderlabs/registrator:latest
2 | container_name: registrator
3 | net: host
4 | volumes:
5 |   - /var/run/docker.sock:/tmp/docker.sock
6 | command: -ip={{ $hostip }} consul://{{ $hostip }}:8500
7 | 


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/assembler.go:
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 1 | package main
 2 | 
 3 | import (
 4 |   "os"
 5 |   "fmt"
 6 |   "io/ioutil"
 7 | 
 8 |   "gopkg.in/yaml.v2"
 9 |   "github.com/gliderlabs/sigil"
10 |   _ "github.com/gliderlabs/sigil/builtin"
11 | )
12 | 
13 | var config = make(map[string]interface{})
14 | var services = make(map[string]interface{})
15 | 
16 | func main() {
17 | 
18 |   data, err := ioutil.ReadFile(os.Args[1])
19 |   fatal(err)
20 |   var obj map[string]interface{}
21 | 	fatal(yaml.Unmarshal(data, &obj))
22 |   if value, ok := obj["config"]; ok {
23 |     exports := value.(map[interface{}]interface{})
24 |     for k,v := range exports {
25 |       config[k.(string)] = v
26 |     }
27 |   }
28 |   if value, ok := obj["services"]; ok {
29 |     svcs := value.([]interface{})
30 |     for _, v := range svcs {
31 |       load(v.(string))
32 |     }
33 |   }
34 |   yml, err := yaml.Marshal(services)
35 |   fatal(err)
36 |   fmt.Println(string(yml))
37 | }
38 | 
39 | func load(name string) {
40 |   data, err := ioutil.ReadFile(name + ".yml")
41 |   fatal(err)
42 |   rendered, err := sigil.Execute(data, config, name)
43 |   fatal(err)
44 |   var service map[string]interface{}
45 | 	fatal(yaml.Unmarshal(rendered.Bytes(), &service))
46 |   if value, ok := service["extra"]; ok {
47 |     exports := value.(map[interface{}]interface{})
48 |     for k,v := range exports {
49 |       config[k.(string)] = v
50 |     }
51 |     delete(service, "extra")
52 |   }
53 |   services[name] = service
54 | }
55 | 
56 | func fatal(err error) {
57 |   if (err != nil) {
58 |     panic(err)
59 |   }
60 | }
61 | 


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