config service not work if running with Docker

[Ales999]

Hello.

encore version v1.46.19

Simple code:

type OnePrefix struct {
	Prefix config.String
	Asn    config.String
	Ignore config.Bool
}

type AppConfigType struct {
	ProdMode config.Bool              // Development OR Prod mode
	Readonly config.Bool              // Readonly mode
	Prefixes config.Values[OnePrefix] // Test using Prefixes
}

var cfg *AppConfigType = config.Load[*AppConfigType]()

// encore:api public
func GetProdMode(ctx context.Context) (*ProdMode, error) {
	if cfg != nil {
		return &ProdMode{AppMode: cfg.ProdMode()}, nil
	} else {
		log.Println("Alert: CFG is NULL")
		return nil, errs.B().Code(errs.InvalidArgument).Msg("cfg is not initialised").Err()
	}
}

Then, if running as ```encore run`` all work:

If running with docker - panic: runtime error: invalid memory address or nil pointer dereference

2025-04-21 13:57:24 {"level":"debug","time":"2025-04-21T08:57:24Z","message":"maxprocs: Leaving GOMAXPROCS=4: CPU quota undefined"}
2025-04-21 13:57:24 {"level":"info","time":"2025-04-21T08:57:24Z","message":"registered 8 API endpoints"}
2025-04-21 13:57:24 2025/04/21 08:57:24 AppConfig iniutialized
2025-04-21 13:57:24 {"level":"info","time":"2025-04-21T08:57:24Z","message":"listening for incoming HTTP requests"}
2025-04-21 13:57:24 {"level":"info","service":"appconfig","endpoint":"GetProdMode","trace_id":"8pgiqk0omhm7afg8vffelmpj4c","time":"2025-04-21T08:57:24Z","message":"starting request"}
2025-04-21 13:57:24 2025/04/21 08:57:24 Alert: CFG is NULL
2025-04-21 13:57:24 {"level":"error","service":"appconfig","endpoint":"GetProdMode","trace_id":"8pgiqk0omhm7afg8vffelmpj4c","error":"cfg is not initialised","code":"invalid_argument","time":"2025-04-21T08:57:24Z","message":"request failed"}
2025-04-21 13:57:24 {"level":"info","service":"appconfig","endpoint":"GetProdMode","trace_id":"8pgiqk0omhm7afg8vffelmpj4c","duration":0.06476,"code":"invalid_argument","time":"2025-04-21T08:57:24Z","message":"request completed"}
2025-04-21 13:57:24 {"level":"error","error":"invalid_argument: cfg is not initialised","time":"2025-04-21T08:57:24Z","message":"call failed"}
2025-04-21 13:57:24 2025/04/21 08:57:24 invalid_argument: cfg is not initialised
2025-04-21 13:57:24 panic: runtime error: invalid memory address or nil pointer dereference
2025-04-21 13:57:24 [signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0xf0b81f]
2025-04-21 13:57:24 
2025-04-21 13:57:24 goroutine 49 [running]:
2025-04-21 13:57:24 encore.app/backend/bgpalert.initBgpAlert()
2025-04-21 13:57:24 /home/xxxxx/go/src/local/wanmon/backend/bgpalert/bgpalert.go:27 +0x13f
2025-04-21 13:57:24 encore.dev/appruntime/apisdk/service.doSetupService[...](0xc000418000, 0x227eb40, 0x227eb70)
2025-04-21 13:57:24 /home/xxxxx/.encore/runtimes/go/appruntime/apisdk/service/service.go:82 +0x268
2025-04-21 13:57:24 encore.dev/appruntime/apisdk/service.(*Decl[...]).InitService.func1()
2025-04-21 13:57:24 /home/xxxxx/.encore/runtimes/go/appruntime/apisdk/service/singleton.go:80 +0x32
2025-04-21 13:57:24 encore.dev/appruntime/shared/syncutil.(*Once).Do(0x227eb70, 0x0?)
2025-04-21 13:57:24 /home/xxxxx/.encore/runtimes/go/appruntime/shared/syncutil/once.go:57 +0x98
2025-04-21 13:57:24 encore.dev/appruntime/apisdk/service.(*Decl[...]).InitService(...)
2025-04-21 13:57:24 /home/xxxxx/.encore/runtimes/go/appruntime/apisdk/service/singleton.go:79
2025-04-21 13:57:24 encore.dev/appruntime/apisdk/service.(*Manager).InitializeServices.func1()
2025-04-21 13:57:24 /home/xxxxx/.encore/runtimes/go/appruntime/apisdk/service/service.go:170 +0x53
2025-04-21 13:57:24 created by encore.dev/appruntime/apisdk/service.(*Manager).InitializeServices in goroutine 1
2025-04-21 13:57:24 /home/xxxxx/.encore/runtimes/go/appruntime/apisdk/service/service.go:169 +0x5a

CUE file:

		// By default we're not in read only mode
Readonly: bool | *false
// Mode app
ProdMode: bool | *false

Prefixes: [
	{
		Prefix: "1.1.1.0/24"
		Asn:    "1111"
		Ignore: false
	},
	{
		Prefix: "2.2.2.0/24"
		Asn:    "2222"
		Ignore: false
	},

]

// An application running due to `encore run`
if #Meta.Environment.Type == "development" && #Meta.Environment.Cloud == "local" {
	ProdMode: true
	Readonly: true
}

// An application running in a development environment in the Cloud
if #Meta.Environment.Type == "development" && #Meta.Environment.Cloud != "local" {
	ProdMode: false
}

// An application running in a production environment
if #Meta.Environment.Type == "production" {
	ProdMode: true
}

// An application running in an environment that Encore has created
// for an open Pull Request on Github
if #Meta.Environment.Type == "ephemeral" {
	ProdMode: false
}

[Ales999]

Try as this:

// encore:service
type AppConfigType struct {
	ProdMode config.Bool              // Development OR Prod mode
	Readonly config.Bool              // Readonly mode
	Prefixes config.Values[OnePrefix] // Test using Prefixes
}

var cfg *AppConfigType = config.Load[*AppConfigType]()

func initAppConfigType() (*AppConfigType, error) {
	log.Println("AppConfig iniutialized")
	return cfg, nil
}

But nothing has changed, same error.

[Ales999]

Very simple project for this error:

https://github.com/Ales999/testcfg

Using:

$ uname -a
Linux mydevsrv 5.15.0-138-generic #148-Ubuntu SMP Fri Mar 14 19:05:48 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
$ docker -v
Docker version 26.1.3, build 26.1.3-0ubuntu1~22.04.1

and same error:

$curl 'localhost:8081/hello/user'
{
  "code": "internal",
  "message": "panic handling request: runtime error: invalid memory address or nil pointer dereference",
  "details": null
}

if run as encore run

$ curl 'localhost:4000/hello/user'
{
  "Message": "Config work FALSE,user!"
}

[Ales999]

Updated my github repository test code and rechecked, - the error is still there :-(

$ encore version
encore version v1.48.2
$ curl 'localhost:8081/hello/user'
{
  "code": "internal",
  "message": "configuration not loaded",
  "details": null
}