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88 lines
2.2 KiB
Go
88 lines
2.2 KiB
Go
package container
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import (
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"fmt"
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"io"
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"golang.org/x/net/context"
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"github.com/docker/docker/api/client"
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"github.com/docker/docker/cli"
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"github.com/docker/docker/pkg/stdcopy"
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"github.com/docker/engine-api/types"
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"github.com/spf13/cobra"
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)
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var validDrivers = map[string]bool{
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"json-file": true,
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"journald": true,
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}
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type logsOptions struct {
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follow bool
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since string
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timestamps bool
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details bool
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tail string
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container string
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}
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// NewLogsCommand creates a new cobra.Command for `docker logs`
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func NewLogsCommand(dockerCli *client.DockerCli) *cobra.Command {
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var opts logsOptions
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cmd := &cobra.Command{
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Use: "logs [OPTIONS] CONTAINER",
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Short: "Fetch the logs of a container",
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Args: cli.ExactArgs(1),
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RunE: func(cmd *cobra.Command, args []string) error {
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opts.container = args[0]
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return runLogs(dockerCli, &opts)
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},
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}
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cmd.SetFlagErrorFunc(flagErrorFunc)
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flags := cmd.Flags()
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flags.BoolVarP(&opts.follow, "follow", "f", false, "Follow log output")
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flags.StringVar(&opts.since, "since", "", "Show logs since timestamp")
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flags.BoolVarP(&opts.timestamps, "timestamps", "t", false, "Show timestamps")
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flags.BoolVar(&opts.details, "details", false, "Show extra details provided to logs")
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flags.StringVar(&opts.tail, "tail", "all", "Number of lines to show from the end of the logs")
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return cmd
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}
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func runLogs(dockerCli *client.DockerCli, opts *logsOptions) error {
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ctx := context.Background()
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c, err := dockerCli.Client().ContainerInspect(ctx, opts.container)
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if err != nil {
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return err
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}
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if !validDrivers[c.HostConfig.LogConfig.Type] {
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return fmt.Errorf("\"logs\" command is supported only for \"json-file\" and \"journald\" logging drivers (got: %s)", c.HostConfig.LogConfig.Type)
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}
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options := types.ContainerLogsOptions{
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ShowStdout: true,
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ShowStderr: true,
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Since: opts.since,
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Timestamps: opts.timestamps,
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Follow: opts.follow,
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Tail: opts.tail,
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Details: opts.details,
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}
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responseBody, err := dockerCli.Client().ContainerLogs(ctx, opts.container, options)
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if err != nil {
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return err
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}
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defer responseBody.Close()
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if c.Config.Tty {
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_, err = io.Copy(dockerCli.Out(), responseBody)
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} else {
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_, err = stdcopy.StdCopy(dockerCli.Out(), dockerCli.Err(), responseBody)
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}
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return err
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}
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