add fields such as CONTAINER_NAME to journald log entries sent to by containers

cmd/nerdctl/container/container_run_test.go

@@ -329,19 +329,44 @@ func TestRunWithJournaldLogDriver(t *testing.T) {
 	time.Sleep(3 * time.Second)
 	journalctl, err := exec.LookPath("journalctl")
 	assert.NilError(t, err)
+
 	inspectedContainer := base.InspectContainer(containerName)
-	found := 0
-	check := func(log poll.LogT) poll.Result {
-		res := icmd.RunCmd(icmd.Command(journalctl, "--no-pager", "--since", "2 minutes ago", fmt.Sprintf("SYSLOG_IDENTIFIER=%s", inspectedContainer.ID[:12])))
-		assert.Equal(t, 0, res.ExitCode, res)
-		if strings.Contains(res.Stdout(), "bar") && strings.Contains(res.Stdout(), "foo") {
-			found = 1
-			return poll.Success()
-		}
-		return poll.Continue("reading from journald is not yet finished")
+
+	type testCase struct {
+		name   string
+		filter string
+	}
+	testCases := []testCase{
+		{
+			name:   "filter journald logs using SYSLOG_IDENTIFIER field",
+			filter: fmt.Sprintf("SYSLOG_IDENTIFIER=%s", inspectedContainer.ID[:12]),
+		},
+		{
+			name:   "filter journald logs using CONTAINER_NAME field",
+			filter: fmt.Sprintf("CONTAINER_NAME=%s", containerName),
+		},
+		{
+			name:   "filter journald logs using IMAGE_NAME field",
+			filter: fmt.Sprintf("IMAGE_NAME=%s", testutil.CommonImage),
+		},
+	}
+	for _, tc := range testCases {
+		tc := tc
+		t.Run(tc.name, func(t *testing.T) {
+			found := 0
+			check := func(log poll.LogT) poll.Result {
+				res := icmd.RunCmd(icmd.Command(journalctl, "--no-pager", "--since", "2 minutes ago", tc.filter))
+				assert.Equal(t, 0, res.ExitCode, res)
+				if strings.Contains(res.Stdout(), "bar") && strings.Contains(res.Stdout(), "foo") {
+					found = 1
+					return poll.Success()
+				}
+				return poll.Continue("reading from journald is not yet finished")
+			}
+			poll.WaitOn(t, check, poll.WithDelay(100*time.Microsecond), poll.WithTimeout(20*time.Second))
+			assert.Equal(t, 1, found)
+		})
 	}
-	poll.WaitOn(t, check, poll.WithDelay(100*time.Microsecond), poll.WithTimeout(20*time.Second))
-	assert.Equal(t, 1, found)
 }
 
 func TestRunWithJournaldLogDriverAndLogOpt(t *testing.T) {

pkg/cmd/container/create.go

@@ -218,7 +218,7 @@ func Create(ctx context.Context, client *containerd.Client, args []string, netMa
 	// 1, nerdctl run --name demo -it imagename
 	// 2, ctrl + c to stop demo container
 	// 3, nerdctl start/restart demo
-	logConfig, err := generateLogConfig(dataStore, id, options.LogDriver, options.LogOpt, options.GOptions.Namespace)
+	logConfig, err := generateLogConfig(dataStore, id, options.LogDriver, options.LogOpt, options.GOptions.Namespace, options.GOptions.Address)
 	if err != nil {
 		return nil, generateRemoveStateDirFunc(ctx, id, internalLabels), err
 	}
@@ -819,12 +819,13 @@ func writeCIDFile(path, id string) error {
 }
 
 // generateLogConfig creates a LogConfig for the current container store
-func generateLogConfig(dataStore string, id string, logDriver string, logOpt []string, ns string) (logConfig logging.LogConfig, err error) {
+func generateLogConfig(dataStore string, id string, logDriver string, logOpt []string, ns, address string) (logConfig logging.LogConfig, err error) {
 	var u *url.URL
 	if u, err = url.Parse(logDriver); err == nil && u.Scheme != "" {
 		logConfig.LogURI = logDriver
 	} else {
 		logConfig.Driver = logDriver
+		logConfig.Address = address
 		logConfig.Opts, err = parseKVStringsMapFromLogOpt(logOpt, logDriver)
 		if err != nil {
 			return logConfig, err
@@ -834,7 +835,7 @@ func generateLogConfig(dataStore string, id string, logDriver string, logOpt []s
 			logConfigB    []byte
 			lu            *url.URL
 		)
-		logDriverInst, err = logging.GetDriver(logDriver, logConfig.Opts)
+		logDriverInst, err = logging.GetDriver(logDriver, logConfig.Opts, logConfig.Address)
 		if err != nil {
 			return logConfig, err
 		}

pkg/cmd/system/info.go

@@ -37,6 +37,7 @@ import (
 	"github.com/containerd/nerdctl/v2/pkg/infoutil"
 	"github.com/containerd/nerdctl/v2/pkg/inspecttypes/dockercompat"
 	"github.com/containerd/nerdctl/v2/pkg/inspecttypes/native"
+	"github.com/containerd/nerdctl/v2/pkg/logging"
 	"github.com/containerd/nerdctl/v2/pkg/rootlessutil"
 	"github.com/containerd/nerdctl/v2/pkg/strutil"
 )
@@ -72,6 +73,7 @@ func Info(ctx context.Context, client *containerd.Client, options types.SystemIn
 		if err != nil {
 			return err
 		}
+		infoCompat.Plugins.Log = logging.Drivers()
 	default:
 		return fmt.Errorf("unknown mode %q", options.Mode)
 	}

pkg/infoutil/infoutil.go

@@ -35,7 +35,6 @@ import (
 	"github.com/containerd/nerdctl/v2/pkg/buildkitutil"
 	"github.com/containerd/nerdctl/v2/pkg/inspecttypes/dockercompat"
 	"github.com/containerd/nerdctl/v2/pkg/inspecttypes/native"
-	"github.com/containerd/nerdctl/v2/pkg/logging"
 	"github.com/containerd/nerdctl/v2/pkg/version"
 )
 
@@ -82,7 +81,6 @@ func Info(ctx context.Context, client *containerd.Client, snapshotter, cgroupMan
 	info.ID = daemonIntro.UUID
 	// Storage drivers and logging drivers are not really Server concept for nerdctl, but mimics `docker info` output
 	info.Driver = snapshotter
-	info.Plugins.Log = logging.Drivers()
 	info.Plugins.Storage = snapshotterPlugins
 	info.SystemTime = time.Now().Format(time.RFC3339Nano)
 	info.LoggingDriver = "json-file" // hard-coded

pkg/logging/fluentd_logger.go

@@ -17,6 +17,7 @@
 package logging
 
 import (
+	"context"
 	"fmt"
 	"math"
 	"net/url"
@@ -99,7 +100,7 @@ func (f *FluentdLogger) Init(dataStore, ns, id string) error {
 	return nil
 }
 
-func (f *FluentdLogger) PreProcess(_ string, config *logging.Config) error {
+func (f *FluentdLogger) PreProcess(_ context.Context, _ string, config *logging.Config) error {
 	if runtime.GOOS == "windows" {
 		// TODO: support fluentd on windows
 		return fmt.Errorf("logging to fluentd is not supported on windows")

pkg/logging/journald_logger.go

@@ -18,6 +18,7 @@ package logging
 
 import (
 	"bytes"
+	"context"
 	"errors"
 	"fmt"
 	"io"
@@ -35,6 +36,8 @@ import (
 	"github.com/containerd/containerd/v2/core/runtime/v2/logging"
 	"github.com/containerd/log"
 
+	"github.com/containerd/nerdctl/v2/pkg/clientutil"
+	"github.com/containerd/nerdctl/v2/pkg/containerutil"
 	"github.com/containerd/nerdctl/v2/pkg/strutil"
 )
 
@@ -52,8 +55,9 @@ func JournalLogOptsValidate(logOptMap map[string]string) error {
 }
 
 type JournaldLogger struct {
-	Opts map[string]string
-	vars map[string]string
+	Opts    map[string]string
+	vars    map[string]string
+	Address string
 }
 
 type identifier struct {
@@ -66,7 +70,7 @@ func (journaldLogger *JournaldLogger) Init(dataStore, ns, id string) error {
 	return nil
 }
 
-func (journaldLogger *JournaldLogger) PreProcess(dataStore string, config *logging.Config) error {
+func (journaldLogger *JournaldLogger) PreProcess(ctx context.Context, dataStore string, config *logging.Config) error {
 	if !journal.Enabled() {
 		return errors.New("the local systemd journal is not available for logging")
 	}
@@ -95,9 +99,37 @@ func (journaldLogger *JournaldLogger) PreProcess(dataStore string, config *loggi
 			syslogIdentifier = b.String()
 		}
 	}
+
+	client, ctx, cancel, err := clientutil.NewClient(ctx, config.Namespace, journaldLogger.Address)
+	if err != nil {
+		return err
+	}
+	defer func() {
+		cancel()
+		client.Close()
+	}()
+	containerID := config.ID
+	container, err := client.LoadContainer(ctx, containerID)
+	if err != nil {
+		return err
+	}
+	containerLabels, err := container.Labels(ctx)
+	if err != nil {
+		return err
+	}
+	containerInfo, err := container.Info(ctx)
+	if err != nil {
+		return err
+	}
+
 	// construct log metadata for the container
 	vars := map[string]string{
 		"SYSLOG_IDENTIFIER": syslogIdentifier,
+		"CONTAINER_TAG":     syslogIdentifier,
+		"CONTAINER_ID":      shortID,
+		"CONTAINER_ID_FULL": containerID,
+		"CONTAINER_NAME":    containerutil.GetContainerName(containerLabels),
+		"IMAGE_NAME":        containerInfo.Image,
 	}
 	journaldLogger.vars = vars
 	return nil

pkg/logging/json_logger.go

@@ -78,7 +78,7 @@ func (jsonLogger *JSONLogger) Init(dataStore, ns, id string) error {
 	return nil
 }
 
-func (jsonLogger *JSONLogger) PreProcess(dataStore string, config *logging.Config) error {
+func (jsonLogger *JSONLogger) PreProcess(ctx context.Context, dataStore string, config *logging.Config) error {
 	var jsonFilePath string
 	if logPath, ok := jsonLogger.Opts[LogPath]; ok {
 		jsonFilePath = logPath

pkg/logging/logging.go

@@ -49,12 +49,12 @@ const (
 
 type Driver interface {
 	Init(dataStore, ns, id string) error
-	PreProcess(dataStore string, config *logging.Config) error
+	PreProcess(ctx context.Context, dataStore string, config *logging.Config) error
 	Process(stdout <-chan string, stderr <-chan string) error
 	PostProcess() error
 }
 
-type DriverFactory func(map[string]string) (Driver, error)
+type DriverFactory func(map[string]string, string) (Driver, error)
 type LogOptsValidateFunc func(logOptMap map[string]string) error
 
 var drivers = make(map[string]DriverFactory)
@@ -81,28 +81,28 @@ func Drivers() []string {
 	return ss
 }
 
-func GetDriver(name string, opts map[string]string) (Driver, error) {
+func GetDriver(name string, opts map[string]string, address string) (Driver, error) {
 	driverFactory, ok := drivers[name]
 	if !ok {
 		return nil, fmt.Errorf("unknown logging driver %q: %w", name, errdefs.ErrNotFound)
 	}
-	return driverFactory(opts)
+	return driverFactory(opts, address)
 }
 
 func init() {
-	RegisterDriver("none", func(opts map[string]string) (Driver, error) {
+	RegisterDriver("none", func(opts map[string]string, address string) (Driver, error) {
 		return &NoneLogger{}, nil
 	}, NoneLogOptsValidate)
-	RegisterDriver("json-file", func(opts map[string]string) (Driver, error) {
+	RegisterDriver("json-file", func(opts map[string]string, address string) (Driver, error) {
 		return &JSONLogger{Opts: opts}, nil
 	}, JSONFileLogOptsValidate)
-	RegisterDriver("journald", func(opts map[string]string) (Driver, error) {
-		return &JournaldLogger{Opts: opts}, nil
+	RegisterDriver("journald", func(opts map[string]string, address string) (Driver, error) {
+		return &JournaldLogger{Opts: opts, Address: address}, nil
 	}, JournalLogOptsValidate)
-	RegisterDriver("fluentd", func(opts map[string]string) (Driver, error) {
+	RegisterDriver("fluentd", func(opts map[string]string, address string) (Driver, error) {
 		return &FluentdLogger{Opts: opts}, nil
 	}, FluentdLogOptsValidate)
-	RegisterDriver("syslog", func(opts map[string]string) (Driver, error) {
+	RegisterDriver("syslog", func(opts map[string]string, address string) (Driver, error) {
 		return &SyslogLogger{Opts: opts}, nil
 	}, SyslogOptsValidate)
 }
@@ -121,9 +121,10 @@ func Main(argv2 string) error {
 
 // LogConfig is marshalled as "log-config.json"
 type LogConfig struct {
-	Driver string            `json:"driver"`
-	Opts   map[string]string `json:"opts,omitempty"`
-	LogURI string            `json:"-"`
+	Driver  string            `json:"driver"`
+	Opts    map[string]string `json:"opts,omitempty"`
+	LogURI  string            `json:"-"`
+	Address string            `json:"address"`
 }
 
 // LogConfigFilePath returns the path of log-config.json
@@ -149,7 +150,7 @@ func LoadLogConfig(dataStore, ns, id string) (LogConfig, error) {
 }
 
 func loggingProcessAdapter(ctx context.Context, driver Driver, dataStore string, config *logging.Config) error {
-	if err := driver.PreProcess(dataStore, config); err != nil {
+	if err := driver.PreProcess(ctx, dataStore, config); err != nil {
 		return err
 	}
 
@@ -215,7 +216,7 @@ func loggerFunc(dataStore string) (logging.LoggerFunc, error) {
 			if err != nil {
 				return err
 			}
-			driver, err := GetDriver(logConfig.Driver, logConfig.Opts)
+			driver, err := GetDriver(logConfig.Driver, logConfig.Opts, logConfig.Address)
 			if err != nil {
 				return err
 			}

pkg/logging/logging_test.go

@@ -38,7 +38,7 @@ func (m *MockDriver) Init(dataStore, ns, id string) error {
 	return nil
 }
 
-func (m *MockDriver) PreProcess(dataStore string, config *logging.Config) error {
+func (m *MockDriver) PreProcess(ctx context.Context, dataStore string, config *logging.Config) error {
 	return nil
 }
 

pkg/logging/none_logger.go

@@ -17,6 +17,8 @@
 package logging
 
 import (
+	"context"
+
 	"github.com/containerd/containerd/v2/core/runtime/v2/logging"
 )
 
@@ -28,7 +30,7 @@ func (n *NoneLogger) Init(dataStore, ns, id string) error {
 	return nil
 }
 
-func (n *NoneLogger) PreProcess(dataStore string, config *logging.Config) error {
+func (n *NoneLogger) PreProcess(ctx context.Context, dataStore string, config *logging.Config) error {
 	return nil
 }
 

pkg/logging/none_logger_test.go

@@ -17,6 +17,7 @@
 package logging
 
 import (
+	"context"
 	"os"
 	"testing"
 	"time"
@@ -29,6 +30,7 @@ import (
 func TestNoneLogger(t *testing.T) {
 	// Create a temporary directory for potential log files
 	tmpDir := t.TempDir()
+	ctx := context.Background()
 
 	logger := &NoneLogger{
 		Opts: map[string]string{},
@@ -40,7 +42,7 @@ func TestNoneLogger(t *testing.T) {
 
 		// Run all logger methods
 		logger.Init(tmpDir, "namespace", "id")
-		logger.PreProcess(tmpDir, &logging.Config{})
+		logger.PreProcess(ctx, tmpDir, &logging.Config{})
 
 		stdout := make(chan string)
 		stderr := make(chan string)

pkg/logging/syslog_logger.go

@@ -17,6 +17,7 @@
 package logging
 
 import (
+	"context"
 	"crypto/tls"
 	"errors"
 	"fmt"
@@ -122,7 +123,7 @@ func (sy *SyslogLogger) Init(dataStore string, ns string, id string) error {
 	return nil
 }
 
-func (sy *SyslogLogger) PreProcess(dataStore string, config *logging.Config) error {
+func (sy *SyslogLogger) PreProcess(ctx context.Context, dataStore string, config *logging.Config) error {
 	logger, err := parseSyslog(config.ID, sy.Opts)
 	if err != nil {
 		return err