117 lines
3.0 KiB
Go
117 lines
3.0 KiB
Go
package main
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import (
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"fmt"
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"os"
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"strings"
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"text/tabwriter"
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"github.com/containers/libpod/cmd/podman/cliconfig"
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"github.com/containers/libpod/cmd/podman/libpodruntime"
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"github.com/containers/libpod/libpod"
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"github.com/pkg/errors"
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"github.com/spf13/cobra"
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)
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func getDescriptorString() string {
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descriptors, err := libpod.GetContainerPidInformationDescriptors()
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if err == nil {
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return fmt.Sprintf(`
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Format Descriptors:
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%s`, strings.Join(descriptors, ","))
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}
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return ""
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}
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var (
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topCommand cliconfig.TopValues
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topDescription = fmt.Sprintf(`Similar to system "top" command.
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Specify format descriptors to alter the output.
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Running "podman top -l pid pcpu seccomp" will print the process ID, the CPU percentage and the seccomp mode of each process of the latest container.
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%s`, getDescriptorString())
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_topCommand = &cobra.Command{
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Use: "top [flags] CONTAINER [FORMAT-DESCRIPTORS]",
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Short: "Display the running processes of a container",
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Long: topDescription,
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RunE: func(cmd *cobra.Command, args []string) error {
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topCommand.InputArgs = args
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topCommand.GlobalFlags = MainGlobalOpts
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return topCmd(&topCommand)
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},
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Example: `podman top ctrID
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podman top --latest
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podman top ctrID pid seccomp args %C`,
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}
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)
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func init() {
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topCommand.Command = _topCommand
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topCommand.SetHelpTemplate(HelpTemplate())
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topCommand.SetUsageTemplate(UsageTemplate())
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flags := topCommand.Flags()
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flags.BoolVar(&topCommand.ListDescriptors, "list-descriptors", false, "")
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flags.MarkHidden("list-descriptors")
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flags.BoolVarP(&topCommand.Latest, "latest", "l", false, "Act on the latest container podman is aware of")
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markFlagHiddenForRemoteClient("latest", flags)
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}
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func topCmd(c *cliconfig.TopValues) error {
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var container *libpod.Container
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var err error
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args := c.InputArgs
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if c.ListDescriptors {
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descriptors, err := libpod.GetContainerPidInformationDescriptors()
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if err != nil {
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return err
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}
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fmt.Println(strings.Join(descriptors, "\n"))
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return nil
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}
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if len(args) < 1 && !c.Latest {
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return errors.Errorf("you must provide the name or id of a running container")
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}
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runtime, err := libpodruntime.GetRuntime(&c.PodmanCommand)
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if err != nil {
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return errors.Wrapf(err, "error creating libpod runtime")
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}
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defer runtime.Shutdown(false)
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var descriptors []string
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if c.Latest {
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descriptors = args
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container, err = runtime.GetLatestContainer()
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} else {
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descriptors = args[1:]
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container, err = runtime.LookupContainer(args[0])
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}
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if err != nil {
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return errors.Wrapf(err, "unable to lookup requested container")
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}
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conStat, err := container.State()
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if err != nil {
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return errors.Wrapf(err, "unable to look up state for %s", args[0])
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}
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if conStat != libpod.ContainerStateRunning {
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return errors.Errorf("top can only be used on running containers")
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}
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psOutput, err := container.GetContainerPidInformation(descriptors)
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if err != nil {
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return err
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}
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w := tabwriter.NewWriter(os.Stdout, 5, 1, 3, ' ', 0)
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for _, proc := range psOutput {
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fmt.Fprintln(w, proc)
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}
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w.Flush()
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return nil
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}
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