diff --git a/context/doc.go b/context/doc.go index a63989e5..6fe1f817 100644 --- a/context/doc.go +++ b/context/doc.go @@ -3,6 +3,19 @@ // logging relevent request information but this package is not limited to // that purpose. // +// The easiest way to get started is to get the background context: +// +// ctx := context.Background() +// +// The returned context should be passed around your application and be the +// root of all other context instances. If the application has a version, this +// line should be called before anything else: +// +// ctx := context.WithVersion(context.Background(), version) +// +// The above will store the version in the context and will be available to +// the logger. +// // Logging // // The most useful aspect of this package is GetLogger. This function takes diff --git a/context/logger.go b/context/logger.go index 8c4c6f6c..7c5e5187 100644 --- a/context/logger.go +++ b/context/logger.go @@ -90,8 +90,16 @@ func getLogrusLogger(ctx Context, keys ...interface{}) *logrus.Entry { } if logger == nil { + fields := logrus.Fields{} + + // Fill in the instance id, if we have it. + instanceID := ctx.Value("instance.id") + if instanceID != nil { + fields["instance.id"] = instanceID + } + // If no logger is found, just return the standard logger. - logger = logrus.NewEntry(logrus.StandardLogger()) + logger = logrus.StandardLogger().WithFields(fields) } fields := logrus.Fields{} diff --git a/context/version.go b/context/version.go new file mode 100644 index 00000000..746cda02 --- /dev/null +++ b/context/version.go @@ -0,0 +1,16 @@ +package context + +// WithVersion stores the application version in the context. The new context +// gets a logger to ensure log messages are marked with the application +// version. +func WithVersion(ctx Context, version string) Context { + ctx = WithValue(ctx, "version", version) + // push a new logger onto the stack + return WithLogger(ctx, GetLogger(ctx, "version")) +} + +// GetVersion returns the application version from the context. An empty +// string may returned if the version was not set on the context. +func GetVersion(ctx Context) string { + return GetStringValue(ctx, "version") +} diff --git a/context/version_test.go b/context/version_test.go new file mode 100644 index 00000000..b8165269 --- /dev/null +++ b/context/version_test.go @@ -0,0 +1,19 @@ +package context + +import "testing" + +func TestVersionContext(t *testing.T) { + ctx := Background() + + if GetVersion(ctx) != "" { + t.Fatalf("context should not yet have a version") + } + + expected := "2.1-whatever" + ctx = WithVersion(ctx, expected) + version := GetVersion(ctx) + + if version != expected { + t.Fatalf("version was not set: %q != %q", version, expected) + } +} diff --git a/registry/handlers/app.go b/registry/handlers/app.go index 8c67c20b..5103c5fb 100644 --- a/registry/handlers/app.go +++ b/registry/handlers/app.go @@ -77,8 +77,6 @@ func NewApp(ctx context.Context, configuration *configuration.Configuration) *Ap isCache: configuration.Proxy.RemoteURL != "", } - app.Context = ctxu.WithLogger(app.Context, ctxu.GetLogger(app, "instance.id")) - // Register the handler dispatchers. app.register(v2.RouteNameBase, func(ctx *Context, r *http.Request) http.Handler { return http.HandlerFunc(apiBase) diff --git a/registry/registry.go b/registry/registry.go index cb0c8765..86cb6a17 100644 --- a/registry/registry.go +++ b/registry/registry.go @@ -35,6 +35,9 @@ var Cmd = &cobra.Command{ return } + // setup context + ctx := context.WithVersion(context.Background(), version.Version) + config, err := resolveConfiguration(args) if err != nil { fmt.Fprintf(os.Stderr, "configuration error: %v\n", err) @@ -51,7 +54,7 @@ var Cmd = &cobra.Command{ }(config.HTTP.Debug.Addr) } - registry, err := NewRegistry(context.Background(), config) + registry, err := NewRegistry(ctx, config) if err != nil { log.Fatalln(err) } @@ -78,9 +81,6 @@ type Registry struct { // NewRegistry creates a new registry from a context and configuration struct. func NewRegistry(ctx context.Context, config *configuration.Configuration) (*Registry, error) { - // Note this - ctx = context.WithValue(ctx, "version", version.Version) - var err error ctx, err = configureLogging(ctx, config) if err != nil { @@ -218,7 +218,7 @@ func configureLogging(ctx context.Context, config *configuration.Configuration) if config.Log.Level == "" && config.Log.Formatter == "" { // If no config for logging is set, fallback to deprecated "Loglevel". log.SetLevel(logLevel(config.Loglevel)) - ctx = context.WithLogger(ctx, context.GetLogger(ctx, "version")) + ctx = context.WithLogger(ctx, context.GetLogger(ctx)) return ctx, nil } @@ -253,9 +253,6 @@ func configureLogging(ctx context.Context, config *configuration.Configuration) log.Debugf("using %q logging formatter", config.Log.Formatter) } - // log the application version with messages - ctx = context.WithLogger(ctx, context.GetLogger(ctx, "version")) - if len(config.Log.Fields) > 0 { // build up the static fields, if present. var fields []interface{}