From 70a4369f5eae45fe1bc94ee4a151a63c9babd6f0 Mon Sep 17 00:00:00 2001 From: Andrea Luzzardi Date: Tue, 6 Dec 2016 18:57:22 -0800 Subject: [PATCH] service logs: Improve formatting - Align output. Previously, output would end up unaligned because of longer task names (e.g. web.1 vs web.10) - Truncate task IDs and add a --no-trunc option - Added a --no-ids option to remove IDs altogether - Got rid of the generic ID Resolver as we need more customization. Signed-off-by: Andrea Luzzardi --- cli/command/idresolver/idresolver.go | 22 +---- cli/command/service/logs.go | 130 ++++++++++++++++++++++----- 2 files changed, 107 insertions(+), 45 deletions(-) diff --git a/cli/command/idresolver/idresolver.go b/cli/command/idresolver/idresolver.go index 511b1a8f54..ad0d96735d 100644 --- a/cli/command/idresolver/idresolver.go +++ b/cli/command/idresolver/idresolver.go @@ -7,7 +7,6 @@ import ( "github.com/docker/docker/api/types/swarm" "github.com/docker/docker/client" - "github.com/docker/docker/pkg/stringid" ) // IDResolver provides ID to Name resolution. @@ -27,7 +26,7 @@ func New(client client.APIClient, noResolve bool) *IDResolver { } func (r *IDResolver) get(ctx context.Context, t interface{}, id string) (string, error) { - switch t := t.(type) { + switch t.(type) { case swarm.Node: node, _, err := r.client.NodeInspectWithRaw(ctx, id) if err != nil { @@ -46,25 +45,6 @@ func (r *IDResolver) get(ctx context.Context, t interface{}, id string) (string, return id, nil } return service.Spec.Annotations.Name, nil - case swarm.Task: - // If the caller passes the full task there's no need to do a lookup. - if t.ID == "" { - var err error - - t, _, err = r.client.TaskInspectWithRaw(ctx, id) - if err != nil { - return id, nil - } - } - taskID := stringid.TruncateID(t.ID) - if t.ServiceID == "" { - return taskID, nil - } - service, err := r.Resolve(ctx, swarm.Service{}, t.ServiceID) - if err != nil { - return "", err - } - return fmt.Sprintf("%s.%d.%s", service, t.Slot, taskID), nil default: return "", fmt.Errorf("unsupported type") } diff --git a/cli/command/service/logs.go b/cli/command/service/logs.go index 19d3d9a488..2f3e6ca90d 100644 --- a/cli/command/service/logs.go +++ b/cli/command/service/logs.go @@ -4,6 +4,7 @@ import ( "bytes" "fmt" "io" + "strconv" "strings" "golang.org/x/net/context" @@ -13,12 +14,16 @@ import ( "github.com/docker/docker/cli" "github.com/docker/docker/cli/command" "github.com/docker/docker/cli/command/idresolver" + "github.com/docker/docker/client" "github.com/docker/docker/pkg/stdcopy" + "github.com/docker/docker/pkg/stringid" "github.com/spf13/cobra" ) type logsOptions struct { noResolve bool + noTrunc bool + noIDs bool follow bool since string timestamps bool @@ -44,6 +49,8 @@ func newLogsCommand(dockerCli *command.DockerCli) *cobra.Command { flags := cmd.Flags() flags.BoolVar(&opts.noResolve, "no-resolve", false, "Do not map IDs to Names") + flags.BoolVar(&opts.noTrunc, "no-trunc", false, "Do not truncate output") + flags.BoolVar(&opts.noIDs, "no-ids", false, "Do not include task IDs") flags.BoolVarP(&opts.follow, "follow", "f", false, "Follow log output") flags.StringVar(&opts.since, "since", "", "Show logs since timestamp") flags.BoolVarP(&opts.timestamps, "timestamps", "t", false, "Show timestamps") @@ -66,26 +73,91 @@ func runLogs(dockerCli *command.DockerCli, opts *logsOptions) error { } client := dockerCli.Client() + + service, _, err := client.ServiceInspectWithRaw(ctx, opts.service) + if err != nil { + return err + } + responseBody, err := client.ServiceLogs(ctx, opts.service, options) if err != nil { return err } defer responseBody.Close() - resolver := idresolver.New(client, opts.noResolve) + var replicas uint64 + if service.Spec.Mode.Replicated != nil && service.Spec.Mode.Replicated.Replicas != nil { + replicas = *service.Spec.Mode.Replicated.Replicas + } + padding := len(strconv.FormatUint(replicas, 10)) - stdout := &logWriter{ctx: ctx, opts: opts, r: resolver, w: dockerCli.Out()} - stderr := &logWriter{ctx: ctx, opts: opts, r: resolver, w: dockerCli.Err()} + taskFormatter := newTaskFormatter(client, opts, padding) + + stdout := &logWriter{ctx: ctx, opts: opts, f: taskFormatter, w: dockerCli.Out()} + stderr := &logWriter{ctx: ctx, opts: opts, f: taskFormatter, w: dockerCli.Err()} // TODO(aluzzardi): Do an io.Copy for services with TTY enabled. _, err = stdcopy.StdCopy(stdout, stderr, responseBody) return err } +type taskFormatter struct { + client client.APIClient + opts *logsOptions + padding int + + r *idresolver.IDResolver + cache map[logContext]string +} + +func newTaskFormatter(client client.APIClient, opts *logsOptions, padding int) *taskFormatter { + return &taskFormatter{ + client: client, + opts: opts, + padding: padding, + r: idresolver.New(client, opts.noResolve), + cache: make(map[logContext]string), + } +} + +func (f *taskFormatter) format(ctx context.Context, logCtx logContext) (string, error) { + if cached, ok := f.cache[logCtx]; ok { + return cached, nil + } + + nodeName, err := f.r.Resolve(ctx, swarm.Node{}, logCtx.nodeID) + if err != nil { + return "", err + } + + serviceName, err := f.r.Resolve(ctx, swarm.Service{}, logCtx.serviceID) + if err != nil { + return "", err + } + + task, _, err := f.client.TaskInspectWithRaw(ctx, logCtx.taskID) + if err != nil { + return "", err + } + + taskName := fmt.Sprintf("%s.%d", serviceName, task.Slot) + if !f.opts.noIDs { + if f.opts.noTrunc { + taskName += fmt.Sprintf(".%s", task.ID) + } else { + taskName += fmt.Sprintf(".%s", stringid.TruncateID(task.ID)) + } + } + padding := strings.Repeat(" ", f.padding-len(strconv.FormatInt(int64(task.Slot), 10))) + formatted := fmt.Sprintf("%s@%s%s", taskName, nodeName, padding) + f.cache[logCtx] = formatted + return formatted, nil +} + type logWriter struct { ctx context.Context opts *logsOptions - r *idresolver.IDResolver + f *taskFormatter w io.Writer } @@ -102,7 +174,7 @@ func (lw *logWriter) Write(buf []byte) (int, error) { return 0, fmt.Errorf("invalid context in log message: %v", string(buf)) } - taskName, nodeName, err := lw.parseContext(string(parts[contextIndex])) + logCtx, err := lw.parseContext(string(parts[contextIndex])) if err != nil { return 0, err } @@ -115,8 +187,11 @@ func (lw *logWriter) Write(buf []byte) (int, error) { } if i == contextIndex { - // TODO(aluzzardi): Consider constant padding. - output = append(output, []byte(fmt.Sprintf("%s@%s |", taskName, nodeName))...) + formatted, err := lw.f.format(lw.ctx, logCtx) + if err != nil { + return 0, err + } + output = append(output, []byte(fmt.Sprintf("%s |", formatted))...) } else { output = append(output, part...) } @@ -129,35 +204,42 @@ func (lw *logWriter) Write(buf []byte) (int, error) { return len(buf), nil } -func (lw *logWriter) parseContext(input string) (string, string, error) { +func (lw *logWriter) parseContext(input string) (logContext, error) { context := make(map[string]string) components := strings.Split(input, ",") for _, component := range components { parts := strings.SplitN(component, "=", 2) if len(parts) != 2 { - return "", "", fmt.Errorf("invalid context: %s", input) + return logContext{}, fmt.Errorf("invalid context: %s", input) } context[parts[0]] = parts[1] } - taskID, ok := context["com.docker.swarm.task.id"] - if !ok { - return "", "", fmt.Errorf("missing task id in context: %s", input) - } - taskName, err := lw.r.Resolve(lw.ctx, swarm.Task{}, taskID) - if err != nil { - return "", "", err - } - nodeID, ok := context["com.docker.swarm.node.id"] if !ok { - return "", "", fmt.Errorf("missing node id in context: %s", input) - } - nodeName, err := lw.r.Resolve(lw.ctx, swarm.Node{}, nodeID) - if err != nil { - return "", "", err + return logContext{}, fmt.Errorf("missing node id in context: %s", input) } - return taskName, nodeName, nil + serviceID, ok := context["com.docker.swarm.service.id"] + if !ok { + return logContext{}, fmt.Errorf("missing service id in context: %s", input) + } + + taskID, ok := context["com.docker.swarm.task.id"] + if !ok { + return logContext{}, fmt.Errorf("missing task id in context: %s", input) + } + + return logContext{ + nodeID: nodeID, + serviceID: serviceID, + taskID: taskID, + }, nil +} + +type logContext struct { + nodeID string + serviceID string + taskID string }