Permalink
Fetching contributors…
Cannot retrieve contributors at this time
89 lines (74 sloc) 2.34 KB
package configuration
import (
"encoding/json"
"io/ioutil"
"log"
"os"
"strconv"
)
var logger = log.New(os.Stdout, "", log.Ldate|log.Ltime|log.Lshortfile)
/*
Service configuration struct
*/
type Configuration struct {
// Marathon configuration
Marathon Marathon
// Bamboo specific configuration
Bamboo Bamboo
// HAProxy output configuration
HAProxy HAProxy
// StatsD configuration
StatsD StatsD
}
/*
Returns Configuration struct from a given file path
Parameters:
filePath: full file path to the JSON configuration
*/
func (config *Configuration) FromFile(filePath string) error {
content, err := ioutil.ReadFile(filePath)
if err != nil {
panic(err)
}
return json.Unmarshal(content, &config)
}
func FromFile(filePath string) (Configuration, error) {
conf := &Configuration{}
err := conf.FromFile(filePath)
setValueFromEnv(&conf.Marathon.Endpoint, "MARATHON_ENDPOINT")
setValueFromEnv(&conf.Marathon.User, "MARATHON_USER")
setValueFromEnv(&conf.Marathon.Password, "MARATHON_PASSWORD")
setBoolValueFromEnv(&conf.Marathon.UseEventStream, "MARATHON_USE_EVENT_STREAM")
setValueFromEnv(&conf.Bamboo.Endpoint, "BAMBOO_ENDPOINT")
setValueFromEnv(&conf.Bamboo.Zookeeper.Host, "BAMBOO_ZK_HOST")
setValueFromEnv(&conf.Bamboo.Zookeeper.Path, "BAMBOO_ZK_PATH")
setValueFromEnv(&conf.HAProxy.TemplatePath, "HAPROXY_TEMPLATE_PATH")
setValueFromEnv(&conf.HAProxy.OutputPath, "HAPROXY_OUTPUT_PATH")
setValueFromEnv(&conf.HAProxy.ReloadCommand, "HAPROXY_RELOAD_CMD")
setValueFromEnv(&conf.HAProxy.ReloadValidationCommand, "HAPROXY_RELOAD_VALIDATION_CMD")
setValueFromEnv(&conf.HAProxy.ReloadCleanupCommand, "HAPROXY_RELOAD_CLEANUP_CMD")
setValueFromEnv(&conf.StatsD.Host, "STATSD_HOST")
setValueFromEnv(&conf.StatsD.Prefix, "STATSD_PREFIX")
setBoolValueFromEnv(&conf.StatsD.Enabled, "STATSD_ENABLED")
return *conf, err
}
func setValueFromEnv(field *string, envVar string) {
env := os.Getenv(envVar)
if len(env) > 0 {
log.Printf("Using environment override %s=%s", envVar, env)
*field = env
}
}
func setBoolValueFromEnv(field *bool, envVar string) {
env := os.Getenv(envVar)
if len(env) > 0 {
log.Printf("Using environment override %s=%s", envVar, env)
x, err := strconv.ParseBool(env)
if err != nil {
log.Printf("Error converting boolean value: %s\n", err)
}
*field = x
} else {
log.Printf("Environment variable not set: %s", envVar)
}
}