63 lines
1.6 KiB
Go
63 lines
1.6 KiB
Go
package client
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import (
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"fmt"
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"io"
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"github.com/docker/docker/api/types"
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Cli "github.com/docker/docker/cli"
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flag "github.com/docker/docker/pkg/mflag"
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"github.com/docker/docker/pkg/stdcopy"
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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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// CmdLogs fetches the logs of a given container.
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//
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// docker logs [OPTIONS] CONTAINER
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func (cli *DockerCli) CmdLogs(args ...string) error {
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cmd := Cli.Subcmd("logs", []string{"CONTAINER"}, Cli.DockerCommands["logs"].Description, true)
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follow := cmd.Bool([]string{"f", "-follow"}, false, "Follow log output")
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since := cmd.String([]string{"-since"}, "", "Show logs since timestamp")
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times := cmd.Bool([]string{"t", "-timestamps"}, false, "Show timestamps")
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tail := cmd.String([]string{"-tail"}, "all", "Number of lines to show from the end of the logs")
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cmd.Require(flag.Exact, 1)
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cmd.ParseFlags(args, true)
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name := cmd.Arg(0)
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c, err := cli.client.ContainerInspect(name)
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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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ContainerID: name,
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ShowStdout: true,
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ShowStderr: true,
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Since: *since,
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Timestamps: *times,
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Follow: *follow,
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Tail: *tail,
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}
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responseBody, err := cli.client.ContainerLogs(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(cli.out, responseBody)
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} else {
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_, err = stdcopy.StdCopy(cli.out, cli.err, responseBody)
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}
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return err
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}
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