diff --git a/Makefile b/Makefile index a112c9d..c0d1b72 100644 --- a/Makefile +++ b/Makefile @@ -16,7 +16,7 @@ endif GOBUILD ?= CGO_ENABLED=0 go build PACKAGES ?= $(shell go list ./...) -SOURCES ?= $(shell find . -name "*.go" -type f) +SOURCES ?= $(shell find . -name "*.go" -type f -not -path ./.devenv/\* -not -path ./.direnv/\*) GENERATE ?= $(PACKAGES) TAGS ?= netgo diff --git a/changelog/unreleased/logging-library.md b/changelog/unreleased/logging-library.md new file mode 100644 index 0000000..e168f68 --- /dev/null +++ b/changelog/unreleased/logging-library.md @@ -0,0 +1,7 @@ +Change: Switch to official logging library + +Since there have been a structured logger part of the Go standard library we +thought it's time to replace the library with that. Be aware that log messages +should change a little bit. + +https://github.com/promhippie/prometheus-vcd-sd/issues/292 diff --git a/pkg/action/discoverer.go b/pkg/action/discoverer.go index cbf7f78..9a3fe8a 100644 --- a/pkg/action/discoverer.go +++ b/pkg/action/discoverer.go @@ -2,14 +2,12 @@ package action import ( "context" - "errors" "fmt" + "log/slog" "strconv" "strings" "time" - "github.com/go-kit/log" - "github.com/go-kit/log/level" "github.com/prometheus/common/model" "github.com/prometheus/prometheus/discovery/targetgroup" "github.com/promhippie/prometheus-vcd-sd/pkg/client" @@ -34,15 +32,12 @@ var ( "storageProfile": providerPrefix + "storage_profile", "vdc": providerPrefix + "vdc", } - - // ErrClientEndpoint defines an error if the client auth fails. - ErrClientEndpoint = errors.New("failed to parse api url") ) // Discoverer implements the Prometheus discoverer interface. type Discoverer struct { configs map[string]*client.Client - logger log.Logger + logger *slog.Logger refresh int separator string lasts map[string]struct{} @@ -74,8 +69,7 @@ func (d *Discoverer) getTargets(_ context.Context) ([]*targetgroup.Group, error) for project, config := range d.configs { if err := config.Authenticate(); err != nil { - level.Warn(d.logger).Log( - "msg", "Failed to authenticate", + d.logger.Error("Failed to authenticate", "project", project, "err", err, ) @@ -91,8 +85,7 @@ func (d *Discoverer) getTargets(_ context.Context) ([]*targetgroup.Group, error) requestDuration.WithLabelValues(project, "org").Observe(time.Since(nowOrg).Seconds()) if err != nil { - level.Warn(d.logger).Log( - "msg", "Failed to fetch org", + d.logger.Error("Failed to fetch org", "project", project, "err", err, ) @@ -106,8 +99,7 @@ func (d *Discoverer) getTargets(_ context.Context) ([]*targetgroup.Group, error) requestDuration.WithLabelValues(project, "vdc").Observe(time.Since(nowVdc).Seconds()) if err != nil { - level.Warn(d.logger).Log( - "msg", "Failed to fetch vdc", + d.logger.Error("Failed to fetch vdc", "project", project, "err", err, ) @@ -132,8 +124,7 @@ func (d *Discoverer) getTargets(_ context.Context) ([]*targetgroup.Group, error) requestDuration.WithLabelValues(project, "vapp").Observe(time.Since(nowVapp).Seconds()) if err != nil { - level.Warn(d.logger).Log( - "msg", "Failed to fetch servers", + d.logger.Error("Failed to fetch servers", "project", project, "vapp", vappName, "err", err, @@ -144,8 +135,7 @@ func (d *Discoverer) getTargets(_ context.Context) ([]*targetgroup.Group, error) } if vapp.VApp.Children == nil { - level.Debug(d.logger).Log( - "msg", "No servers defined", + d.logger.Debug("No servers defined", "project", project, "vapp", vappName, ) @@ -155,8 +145,7 @@ func (d *Discoverer) getTargets(_ context.Context) ([]*targetgroup.Group, error) servers := vapp.VApp.Children.VM - level.Debug(d.logger).Log( - "msg", "Requested servers", + d.logger.Debug("Requested servers", "project", project, "vapp", vappName, "count", len(servers), @@ -172,8 +161,7 @@ func (d *Discoverer) getTargets(_ context.Context) ([]*targetgroup.Group, error) requestDuration.WithLabelValues(project, "vm").Observe(time.Since(nowMachine).Seconds()) if err != nil { - level.Warn(d.logger).Log( - "msg", "Failed to fetch vm", + d.logger.Error("Failed to fetch vm", "project", project, "vapp", vappName, "server", server.Name, @@ -190,8 +178,7 @@ func (d *Discoverer) getTargets(_ context.Context) ([]*targetgroup.Group, error) requestDuration.WithLabelValues(project, "metadata").Observe(time.Since(nowMeta).Seconds()) if err != nil { - level.Warn(d.logger).Log( - "msg", "Failed to fetch metadata", + d.logger.Error("Failed to fetch metadata", "project", project, "vapp", vappName, "server", server.Name, @@ -244,8 +231,7 @@ func (d *Discoverer) getTargets(_ context.Context) ([]*targetgroup.Group, error) target.Labels[model.LabelName(Labels["metadataPrefix"]+normalized)] = model.LabelValue(entry.TypedValue.Value) } - level.Debug(d.logger).Log( - "msg", "Server added", + d.logger.Debug("Server added", "project", project, "vapp", vappName, "server", vm.VM.Name, @@ -262,8 +248,7 @@ func (d *Discoverer) getTargets(_ context.Context) ([]*targetgroup.Group, error) for k := range d.lasts { if _, ok := current[k]; !ok { - level.Debug(d.logger).Log( - "msg", "Server deleted", + d.logger.Debug("Server deleted", "source", k, ) diff --git a/pkg/action/metrics.go b/pkg/action/metrics.go index b6fa87a..0ad27fa 100644 --- a/pkg/action/metrics.go +++ b/pkg/action/metrics.go @@ -2,9 +2,8 @@ package action import ( "fmt" + "log/slog" - "github.com/go-kit/log" - "github.com/go-kit/log/level" "github.com/prometheus/client_golang/prometheus" "github.com/prometheus/client_golang/prometheus/collectors" "github.com/promhippie/prometheus-vcd-sd/pkg/version" @@ -49,11 +48,9 @@ func init() { } type promLogger struct { - logger log.Logger + logger *slog.Logger } func (pl promLogger) Println(v ...interface{}) { - level.Error(pl.logger).Log( - "msg", fmt.Sprintln(v...), - ) + pl.logger.Error(fmt.Sprintln(v...)) } diff --git a/pkg/action/server.go b/pkg/action/server.go index 68f3d55..e23b135 100644 --- a/pkg/action/server.go +++ b/pkg/action/server.go @@ -4,6 +4,7 @@ import ( "context" "fmt" "io" + "log/slog" "net/http" "net/url" "os" @@ -11,8 +12,6 @@ import ( "time" "github.com/go-chi/chi/v5" - "github.com/go-kit/log" - "github.com/go-kit/log/level" "github.com/oklog/run" "github.com/prometheus/client_golang/prometheus/promhttp" "github.com/prometheus/exporter-toolkit/web" @@ -24,9 +23,8 @@ import ( ) // Server handles the server sub-command. -func Server(cfg *config.Config, logger log.Logger) error { - level.Info(logger).Log( - "msg", "Launching Prometheus vCloud Director SD", +func Server(cfg *config.Config, logger *slog.Logger) error { + logger.Info("Launching Prometheus vCloud Director SD", "version", version.String, "revision", version.Revision, "date", version.Date, @@ -44,8 +42,7 @@ func Server(cfg *config.Config, logger log.Logger) error { username, err := config.Value(credential.Username) if err != nil { - level.Error(logger).Log( - "msg", "Failed to read username secret", + logger.Error("Failed to read username secret", "project", credential.Project, "err", err, ) @@ -56,8 +53,7 @@ func Server(cfg *config.Config, logger log.Logger) error { password, err := config.Value(credential.Password) if err != nil { - level.Error(logger).Log( - "msg", "Failed to read password secret", + logger.Error("Failed to read password secret", "project", credential.Project, "err", err, ) @@ -68,12 +64,11 @@ func Server(cfg *config.Config, logger log.Logger) error { parsed, err := url.ParseRequestURI(credential.URL) if err != nil { - level.Error(logger).Log( - "msg", ErrClientEndpoint, + logger.Error("Failed to parse api url", "project", credential.Project, ) - return ErrClientEndpoint + return fmt.Errorf("failed to parse api url") } configs[credential.Project] = client.New( @@ -107,9 +102,8 @@ func Server(cfg *config.Config, logger log.Logger) error { } gr.Add(func() error { - level.Info(logger).Log( - "msg", "Starting metrics server", - "addr", cfg.Server.Addr, + logger.Info("Starting metrics server", + "address", cfg.Server.Addr, ) return web.ListenAndServe( @@ -126,16 +120,14 @@ func Server(cfg *config.Config, logger log.Logger) error { defer cancel() if err := server.Shutdown(ctx); err != nil { - level.Error(logger).Log( - "msg", "Failed to shutdown metrics gracefully", + logger.Error("Failed to shutdown metrics gracefully", "err", err, ) return } - level.Info(logger).Log( - "msg", "Metrics shutdown gracefully", + logger.Info("Metrics shutdown gracefully", "reason", reason, ) }) @@ -158,7 +150,7 @@ func Server(cfg *config.Config, logger log.Logger) error { return gr.Run() } -func handler(cfg *config.Config, logger log.Logger) *chi.Mux { +func handler(cfg *config.Config, logger *slog.Logger) *chi.Mux { mux := chi.NewRouter() mux.Use(middleware.Recoverer(logger)) mux.Use(middleware.RealIP) @@ -198,8 +190,7 @@ func handler(cfg *config.Config, logger log.Logger) *chi.Mux { content, err := os.ReadFile(cfg.Target.File) if err != nil { - level.Info(logger).Log( - "msg", "Failed to read service discovery data", + logger.Error("Failed to read service discovery data", "err", err, ) diff --git a/pkg/adapter/adapter.go b/pkg/adapter/adapter.go index 81b9d28..d8cea9b 100644 --- a/pkg/adapter/adapter.go +++ b/pkg/adapter/adapter.go @@ -19,12 +19,11 @@ import ( "context" "encoding/json" "fmt" + "log/slog" "os" "path/filepath" "reflect" - "github.com/go-kit/log" - "github.com/go-kit/log/level" "github.com/prometheus/prometheus/discovery" "github.com/prometheus/prometheus/discovery/targetgroup" ) @@ -43,7 +42,7 @@ type Adapter struct { manager *discovery.Manager output string name string - logger log.Logger + logger *slog.Logger } func mapToArray(m map[string]*customSD) []customSD { @@ -84,7 +83,7 @@ func (a *Adapter) generateTargetGroups(allTargetGroups map[string][]*targetgroup a.groups = tempGroups err := a.writeOutput() if err != nil { - level.Error(log.With(a.logger, "component", "sd-adapter")).Log("err", err) + a.logger.With("component", "sd-adapter").Error("", "err", err) } } @@ -138,12 +137,12 @@ func (a *Adapter) Run() { } // NewAdapter creates a new instance of Adapter. -func NewAdapter(ctx context.Context, file string, name string, d discovery.Discoverer, logger log.Logger) *Adapter { +func NewAdapter(ctx context.Context, file string, name string, d discovery.Discoverer, logger *slog.Logger) *Adapter { return &Adapter{ ctx: ctx, disc: d, groups: make(map[string]*customSD), - manager: discovery.NewManager(ctx, logger), + manager: discovery.NewManager(ctx, nil), output: file, name: name, logger: logger, diff --git a/pkg/command/health.go b/pkg/command/health.go index 58013ca..fe959ca 100644 --- a/pkg/command/health.go +++ b/pkg/command/health.go @@ -4,7 +4,6 @@ import ( "fmt" "net/http" - "github.com/go-kit/log/level" "github.com/promhippie/prometheus-vcd-sd/pkg/config" "github.com/urfave/cli/v2" ) @@ -20,8 +19,7 @@ func Health(cfg *config.Config) *cli.Command { if c.IsSet("vcd.config") { if err := readConfig(c.String("vcd.config"), cfg); err != nil { - level.Error(logger).Log( - "msg", "Failed to read config", + logger.Error("Failed to read config", "err", err, ) @@ -37,8 +35,7 @@ func Health(cfg *config.Config) *cli.Command { ) if err != nil { - level.Error(logger).Log( - "msg", "Failed to request health check", + logger.Error("Failed to request health check", "err", err, ) @@ -48,8 +45,7 @@ func Health(cfg *config.Config) *cli.Command { defer resp.Body.Close() if resp.StatusCode != 200 { - level.Error(logger).Log( - "msg", "Health check seems to be in bad state", + logger.Error("Health check seems to be in bad state", "err", err, "code", resp.StatusCode, ) @@ -57,6 +53,10 @@ func Health(cfg *config.Config) *cli.Command { return err } + logger.Debug("Health check seems to be fine", + "code", resp.StatusCode, + ) + return nil }, } diff --git a/pkg/command/server.go b/pkg/command/server.go index ba6ab91..c6cf1c8 100644 --- a/pkg/command/server.go +++ b/pkg/command/server.go @@ -3,7 +3,6 @@ package command import ( "errors" - "github.com/go-kit/log/level" "github.com/promhippie/prometheus-vcd-sd/pkg/action" "github.com/promhippie/prometheus-vcd-sd/pkg/config" "github.com/urfave/cli/v2" @@ -20,8 +19,7 @@ func Server(cfg *config.Config) *cli.Command { if c.IsSet("vcd.config") { if err := readConfig(c.String("vcd.config"), cfg); err != nil { - level.Error(logger).Log( - "msg", "Failed to read config", + logger.Error("Failed to read config", "err", err, ) @@ -30,10 +28,7 @@ func Server(cfg *config.Config) *cli.Command { } if cfg.Target.File == "" { - level.Error(logger).Log( - "msg", "Missing path for output.file", - ) - + logger.Error("Missing path for output.file") return errors.New("missing path for output.file") } @@ -54,51 +49,33 @@ func Server(cfg *config.Config) *cli.Command { ) if credentials.URL == "" { - level.Error(logger).Log( - "msg", "Missing required vcd.url", - ) - + logger.Error("Missing required vcd.url") return errors.New("missing required vcd.url") } if credentials.Username == "" { - level.Error(logger).Log( - "msg", "Missing required vcd.username", - ) - + logger.Error("Missing required vcd.username") return errors.New("missing required vcd.username") } if credentials.Password == "" { - level.Error(logger).Log( - "msg", "Missing required vcd.password", - ) - + logger.Error("Missing required vcd.password") return errors.New("missing required vcd.password") } if credentials.Org == "" { - level.Error(logger).Log( - "msg", "Missing required vcd.org", - ) - + logger.Error("Missing required vcd.org") return errors.New("missing required vcd.org") } if credentials.Vdc == "" { - level.Error(logger).Log( - "msg", "Missing required vcd.vdc", - ) - + logger.Error("Missing required vcd.vdc") return errors.New("missing required vcd.vdc") } } if len(cfg.Target.Credentials) == 0 { - level.Error(logger).Log( - "msg", "Missing any credentials", - ) - + logger.Error("Missing any credentials") return errors.New("missing any credentials") } diff --git a/pkg/command/setup.go b/pkg/command/setup.go index e0e8b97..4ace512 100644 --- a/pkg/command/setup.go +++ b/pkg/command/setup.go @@ -3,12 +3,11 @@ package command import ( "encoding/json" "errors" + "log/slog" "os" "path/filepath" "strings" - "github.com/go-kit/log" - "github.com/go-kit/log/level" "github.com/promhippie/prometheus-vcd-sd/pkg/config" "gopkg.in/yaml.v3" ) @@ -18,36 +17,35 @@ var ( ErrConfigFormatInvalid = errors.New("config extension is not supported") ) -func setupLogger(cfg *config.Config) log.Logger { - var logger log.Logger - +func setupLogger(cfg *config.Config) *slog.Logger { if cfg.Logs.Pretty { - logger = log.NewSyncLogger( - log.NewLogfmtLogger(os.Stdout), - ) - } else { - logger = log.NewSyncLogger( - log.NewJSONLogger(os.Stdout), + return slog.New( + slog.NewTextHandler(os.Stdout, &slog.HandlerOptions{ + Level: loggerLevel(cfg), + }), ) } + return slog.New( + slog.NewJSONHandler(os.Stdout, &slog.HandlerOptions{ + Level: loggerLevel(cfg), + }), + ) +} + +func loggerLevel(cfg *config.Config) slog.Leveler { switch strings.ToLower(cfg.Logs.Level) { case "error": - logger = level.NewFilter(logger, level.AllowError()) + return slog.LevelError case "warn": - logger = level.NewFilter(logger, level.AllowWarn()) + return slog.LevelWarn case "info": - logger = level.NewFilter(logger, level.AllowInfo()) + return slog.LevelInfo case "debug": - logger = level.NewFilter(logger, level.AllowDebug()) - default: - logger = level.NewFilter(logger, level.AllowInfo()) + return slog.LevelDebug } - return log.With( - logger, - "ts", log.DefaultTimestampUTC, - ) + return slog.LevelInfo } func readConfig(file string, cfg *config.Config) error { diff --git a/pkg/middleware/recoverer.go b/pkg/middleware/recoverer.go index 1cc2dab..95f9de1 100644 --- a/pkg/middleware/recoverer.go +++ b/pkg/middleware/recoverer.go @@ -1,21 +1,18 @@ package middleware import ( + "log/slog" "net/http" "runtime/debug" - - "github.com/go-kit/log" - "github.com/go-kit/log/level" ) // Recoverer initializes a recoverer middleware. -func Recoverer(logger log.Logger) func(next http.Handler) http.Handler { +func Recoverer(logger *slog.Logger) func(next http.Handler) http.Handler { return func(next http.Handler) http.Handler { fn := func(w http.ResponseWriter, r *http.Request) { defer func() { if rvr := recover(); rvr != nil { - level.Error(logger).Log( - "msg", rvr.(string), + logger.Error(rvr.(string), "trace", string(debug.Stack()), )