/
consul.go
139 lines (110 loc) · 2.84 KB
/
consul.go
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package main
import(
"os"
"log"
"errors"
"strings"
"time"
"net/http"
consul "github.com/hashicorp/consul/api"
)
type ServerConfig struct {
Port string
OpenApiKey string
CloseApiKey string
DeliveryID string
Receivers []string
AuthToken string
AppEnv string
}
var defaults map[string]string = map[string]string{
"port": "8080",
}
func fetchConsul(kv *consul.KV, env string, key string) (value string, conf_err error) {
pair, _, _ := kv.Get("go-sms/" + env + "/" + key, nil)
if pair == nil {
conf_err = errors.New("Failed to fetch \"" + key + "\" key for you environment. Leave default: " + defaults[key])
value = defaults[key]
return
}
value = string(pair.Value)
return
}
func fetchConfig(continuousFetch bool) {
var duration time.Duration
if continuousFetch {
duration = time.Duration(5 * time.Second)
}
FetchLoop:
for {
<- time.After(duration)
consulConfig := &consul.Config{
Address: "consul.service.consul:8500",
Scheme: "http",
HttpClient: http.DefaultClient,
}
client, err := consul.NewClient(consulConfig)
if err != nil {
log.Println("Failed to connect consul", err)
return
}
kv := client.KV()
serverConfig.Port, err = fetchConsul(kv, serverConfig.AppEnv, "port")
if err != nil {
log.Println(err)
}
serverConfig.OpenApiKey, err = fetchConsul(kv, serverConfig.AppEnv, "open_api_key")
if err != nil {
log.Println(err)
}
serverConfig.CloseApiKey, err = fetchConsul(kv, serverConfig.AppEnv, "close_api_key")
if err != nil {
log.Println(err)
}
serverConfig.DeliveryID, err = fetchConsul(kv, serverConfig.AppEnv, "delivery_id")
if err != nil {
log.Println(err)
}
receivers, err := fetchConsul(kv, serverConfig.AppEnv, "receivers")
if err != nil {
log.Println(err)
}
serverConfig.Receivers = strings.Split(receivers, ",")
serverConfig.AuthToken, err = fetchConsul(kv, serverConfig.AppEnv, "auth_token")
if err != nil {
log.Println(err)
}
agent := client.Agent()
err = agent.PassTTL("service:go-sms1", "Internal TTL ping")
if err != nil {
log.Println(err)
}
if duration == time.Duration(0) {
if serverConfig.AppEnv != "development" {
check := &consul.AgentServiceCheck{
TTL: "30s",
}
service := &consul.AgentServiceRegistration{
ID: "go-sms1",
Name: "go-sms",
Tags: []string{"1", serverConfig.AppEnv},
Port: 8080,
Check: check,
}
err = agent.ServiceRegister(service)
if err != nil {
log.Println(err)
}
}
break FetchLoop
}
}
}
func (serverConfig *ServerConfig) loadConfig() {
serverConfig.AppEnv = "development"
env := os.Getenv("_ENV")
if env != "" { serverConfig.AppEnv = env }
log.Println("Running in", serverConfig.AppEnv, "environment")
fetchConfig(false)
go fetchConfig(true)
}