Initial QSfera import

Server/services/nats/pkg/config/config.go

@@ -0,0 +1,31 @@
+package config
+
+import (
+	"context"
+
+	"github.com/qsfera/server/pkg/shared"
+)
+
+// Config combines all available configuration parts.
+type Config struct {
+	Commons  *shared.Commons `yaml:"-"` // don't use this directly as configuration for a service
+	Service  Service         `yaml:"-"`
+	LogLevel string          `yaml:"loglevel" env:"OC_LOG_LEVEL;NATS_LOG_LEVEL" desc:"The log level. Valid values are: 'panic', 'fatal', 'error', 'warn', 'info', 'debug', 'trace'." introductionVersion:"1.0.0"`
+	Debug    Debug           `yaml:"debug"`
+
+	Nats Nats `ociConfig:"nats"`
+
+	Context context.Context `yaml:"-"`
+}
+
+// Nats is the nats config
+type Nats struct {
+	Host                    string `yaml:"host" env:"NATS_NATS_HOST" desc:"Bind address." introductionVersion:"1.0.0"`
+	Port                    int    `yaml:"port" env:"NATS_NATS_PORT" desc:"Bind port." introductionVersion:"1.0.0"`
+	ClusterID               string `yaml:"clusterid" env:"NATS_NATS_CLUSTER_ID" desc:"ID of the NATS cluster." introductionVersion:"1.0.0"`
+	StoreDir                string `yaml:"store_dir" env:"NATS_NATS_STORE_DIR" desc:"The directory where the filesystem storage will store NATS JetStream data. If not defined, the root directory derives from $OC_BASE_DATA_PATH/nats." introductionVersion:"1.0.0"`
+	TLSCert                 string `yaml:"tls_cert" env:"NATS_TLS_CERT" desc:"Path/File name of the TLS server certificate (in PEM format) for the NATS listener. If not defined, the root directory derives from $OC_BASE_DATA_PATH/nats." introductionVersion:"1.0.0"`
+	TLSKey                  string `yaml:"tls_key" env:"NATS_TLS_KEY" desc:"Path/File name for the TLS certificate key (in PEM format) for the NATS listener. If not defined, the root directory derives from $OC_BASE_DATA_PATH/nats." introductionVersion:"1.0.0"`
+	TLSSkipVerifyClientCert bool   `yaml:"tls_skip_verify_client_cert" env:"OC_INSECURE;NATS_TLS_SKIP_VERIFY_CLIENT_CERT" desc:"Whether the NATS server should skip the client certificate verification during the TLS handshake." introductionVersion:"1.0.0"`
+	EnableTLS               bool   `yaml:"enable_tls" env:"OC_EVENTS_ENABLE_TLS;NATS_EVENTS_ENABLE_TLS" desc:"Enable TLS for the connection to the events broker. The events broker is the КуСфера service which receives and delivers events between the services." introductionVersion:"1.0.0"`
+}

Server/services/nats/pkg/config/debug.go

@@ -0,0 +1,9 @@
+package config
+
+// Debug defines the available debug configuration.
+type Debug struct {
+	Addr   string `yaml:"addr" env:"NATS_DEBUG_ADDR" desc:"Bind address of the debug server, where metrics, health, config and debug endpoints will be exposed." introductionVersion:"1.0.0"`
+	Token  string `yaml:"token" env:"NATS_DEBUG_TOKEN" desc:"Token to secure the metrics endpoint." introductionVersion:"1.0.0"`
+	Pprof  bool   `yaml:"pprof" env:"NATS_DEBUG_PPROF" desc:"Enables pprof, which can be used for profiling." introductionVersion:"1.0.0"`
+	Zpages bool   `yaml:"zpages" env:"NATS_DEBUG_ZPAGES" desc:"Enables zpages, which can be used for collecting and viewing in-memory traces." introductionVersion:"1.0.0"`
+}

Server/services/nats/pkg/config/defaults/defaultconfig.go

@@ -0,0 +1,55 @@
+package defaults
+
+import (
+	"path/filepath"
+
+	"github.com/qsfera/server/pkg/config/defaults"
+	"github.com/qsfera/server/services/nats/pkg/config"
+)
+
+// NOTE: Most of this configuration is not needed to keep it as simple as possible
+// TODO: Clean up unneeded configuration
+
+// FullDefaultConfig returns a fully initialized default configuration
+func FullDefaultConfig() *config.Config {
+	cfg := DefaultConfig()
+	EnsureDefaults(cfg)
+	Sanitize(cfg)
+	return cfg
+}
+
+// DefaultConfig returns a basic default configuration
+func DefaultConfig() *config.Config {
+	return &config.Config{
+		Debug: config.Debug{
+			Addr:   "127.0.0.1:9234",
+			Token:  "",
+			Pprof:  false,
+			Zpages: false,
+		},
+		Service: config.Service{
+			Name: "nats",
+		},
+		Nats: config.Nats{
+			Host:      "127.0.0.1",
+			Port:      9233,
+			ClusterID: "qsfera-cluster",
+			StoreDir:  filepath.Join(defaults.BaseDataPath(), "nats"),
+			TLSCert:   filepath.Join(defaults.BaseDataPath(), "nats/tls.crt"),
+			TLSKey:    filepath.Join(defaults.BaseDataPath(), "nats/tls.key"),
+			EnableTLS: false,
+		},
+	}
+}
+
+// EnsureDefaults adds default values to the configuration if they are not set yet
+func EnsureDefaults(cfg *config.Config) {
+	if cfg.LogLevel == "" {
+		cfg.LogLevel = "error"
+	}
+}
+
+// Sanitize sanitizes the configuration
+func Sanitize(cfg *config.Config) {
+	// nothing to sanitize here atm
+}

Server/services/nats/pkg/config/parser/parse.go

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+package parser
+
+import (
+	"errors"
+
+	occfg "github.com/qsfera/server/pkg/config"
+	"github.com/qsfera/server/services/nats/pkg/config"
+	"github.com/qsfera/server/services/nats/pkg/config/defaults"
+
+	"github.com/qsfera/server/pkg/config/envdecode"
+)
+
+// ParseConfig loads configuration from known paths.
+func ParseConfig(cfg *config.Config) error {
+	err := occfg.BindSourcesToStructs(cfg.Service.Name, cfg)
+	if err != nil {
+		return err
+	}
+
+	defaults.EnsureDefaults(cfg)
+
+	// load all env variables relevant to the config in the current context.
+	if err := envdecode.Decode(cfg); err != nil {
+		// no environment variable set for this config is an expected "error"
+		if !errors.Is(err, envdecode.ErrNoTargetFieldsAreSet) {
+			return err
+		}
+	}
+
+	defaults.Sanitize(cfg)
+
+	return Validate(cfg)
+}
+
+func Validate(cfg *config.Config) error {
+	return nil
+}

Server/services/nats/pkg/config/service.go

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+package config
+
+// Service defines the available service configuration.
+type Service struct {
+	Name string `yaml:"-"`
+}