| package client |
| |
| import ( |
| "fmt" |
| "io" |
| |
| Cli "github.com/docker/docker/cli" |
| flag "github.com/docker/docker/pkg/mflag" |
| "github.com/docker/docker/pkg/stdcopy" |
| "github.com/docker/engine-api/types" |
| ) |
| |
| var validDrivers = map[string]bool{ |
| "json-file": true, |
| "journald": true, |
| } |
| |
| // CmdLogs fetches the logs of a given container. |
| // |
| // docker logs [OPTIONS] CONTAINER |
| func (cli *DockerCli) CmdLogs(args ...string) error { |
| cmd := Cli.Subcmd("logs", []string{"CONTAINER"}, Cli.DockerCommands["logs"].Description, true) |
| follow := cmd.Bool([]string{"f", "-follow"}, false, "Follow log output") |
| since := cmd.String([]string{"-since"}, "", "Show logs since timestamp") |
| times := cmd.Bool([]string{"t", "-timestamps"}, false, "Show timestamps") |
| tail := cmd.String([]string{"-tail"}, "all", "Number of lines to show from the end of the logs") |
| cmd.Require(flag.Exact, 1) |
| |
| cmd.ParseFlags(args, true) |
| |
| name := cmd.Arg(0) |
| |
| c, err := cli.client.ContainerInspect(name) |
| if err != nil { |
| return err |
| } |
| |
| if !validDrivers[c.HostConfig.LogConfig.Type] { |
| return fmt.Errorf("\"logs\" command is supported only for \"json-file\" and \"journald\" logging drivers (got: %s)", c.HostConfig.LogConfig.Type) |
| } |
| |
| options := types.ContainerLogsOptions{ |
| ContainerID: name, |
| ShowStdout: true, |
| ShowStderr: true, |
| Since: *since, |
| Timestamps: *times, |
| Follow: *follow, |
| Tail: *tail, |
| } |
| responseBody, err := cli.client.ContainerLogs(options) |
| if err != nil { |
| return err |
| } |
| defer responseBody.Close() |
| |
| if c.Config.Tty { |
| _, err = io.Copy(cli.out, responseBody) |
| } else { |
| _, err = stdcopy.StdCopy(cli.out, cli.err, responseBody) |
| } |
| return err |
| } |