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https://github.com/containers/podman.git
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500a2d508b
Implement the `top` command for podmanV2. Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
92 lines
2.5 KiB
Go
92 lines
2.5 KiB
Go
package containers
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import (
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"context"
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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/podmanV2/registry"
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"github.com/containers/libpod/pkg/domain/entities"
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"github.com/containers/psgo"
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"github.com/pkg/errors"
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"github.com/spf13/cobra"
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)
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var (
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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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Format Descriptors:
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%s`, strings.Join(psgo.ListDescriptors(), ","))
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topOptions = entities.TopOptions{}
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topCommand = &cobra.Command{
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Use: "top [flags] CONTAINER [FORMAT-DESCRIPTORS|ARGS]",
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Short: "Display the running processes of a container",
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Long: topDescription,
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PersistentPreRunE: preRunE,
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RunE: top,
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Args: cobra.ArbitraryArgs,
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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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podman top ctrID -eo user,pid,comm`,
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}
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)
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func init() {
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registry.Commands = append(registry.Commands, registry.CliCommand{
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Mode: []entities.EngineMode{entities.ABIMode, entities.TunnelMode},
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Command: topCommand,
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})
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topCommand.SetHelpTemplate(registry.HelpTemplate())
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topCommand.SetUsageTemplate(registry.UsageTemplate())
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flags := topCommand.Flags()
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flags.SetInterspersed(false)
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flags.BoolVar(&topOptions.ListDescriptors, "list-descriptors", false, "")
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flags.BoolVarP(&topOptions.Latest, "latest", "l", false, "Act on the latest container podman is aware of")
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_ = flags.MarkHidden("list-descriptors") // meant only for bash completion
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if registry.IsRemote() {
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_ = flags.MarkHidden("latest")
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}
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}
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func top(cmd *cobra.Command, args []string) error {
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if topOptions.ListDescriptors {
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fmt.Println(strings.Join(psgo.ListDescriptors(), "\n"))
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return nil
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}
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if len(args) < 1 && !topOptions.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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if topOptions.Latest {
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topOptions.Descriptors = args
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} else {
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topOptions.NameOrID = args[0]
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topOptions.Descriptors = args[1:]
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}
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topResponse, err := registry.ContainerEngine().ContainerTop(context.Background(), topOptions)
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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 topResponse.Value {
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if _, err := fmt.Fprintln(w, proc); err != nil {
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return err
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}
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}
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return w.Flush()
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}
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