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package pods
import (
"context"
"fmt"
"os"
"strings"
"text/tabwriter"
"github.com/containers/libpod/cmd/podman/registry"
"github.com/containers/libpod/pkg/domain/entities"
"github.com/containers/psgo"
"github.com/pkg/errors"
"github.com/spf13/cobra"
)
var (
topDescription = fmt.Sprintf(`Specify format descriptors to alter the output.
You may run "podman pod top -l pid pcpu seccomp" to print the process ID, the CPU percentage and the seccomp mode of each process of the latest pod.
Format Descriptors:
%s`, strings.Join(psgo.ListDescriptors(), ","))
topOptions = entities.PodTopOptions{}
topCommand = &cobra.Command{
Use: "top [flags] POD [FORMAT-DESCRIPTORS|ARGS]",
Short: "Display the running processes of containers in a pod",
Long: topDescription,
RunE: top,
Args: cobra.ArbitraryArgs,
Example: `podman pod top podID
podman pod top --latest
podman pod top podID pid seccomp args %C
podman pod top podID -eo user,pid,comm`,
}
)
func init() {
registry.Commands = append(registry.Commands, registry.CliCommand{
Mode: []entities.EngineMode{entities.ABIMode, entities.TunnelMode},
Command: topCommand,
Parent: podCmd,
})
flags := topCommand.Flags()
flags.SetInterspersed(false)
flags.BoolVar(&topOptions.ListDescriptors, "list-descriptors", false, "")
flags.BoolVarP(&topOptions.Latest, "latest", "l", false, "Act on the latest container podman is aware of")
_ = flags.MarkHidden("list-descriptors") // meant only for bash completion
if registry.IsRemote() {
_ = flags.MarkHidden("latest")
}
}
func top(cmd *cobra.Command, args []string) error {
if topOptions.ListDescriptors {
fmt.Println(strings.Join(psgo.ListDescriptors(), "\n"))
return nil
}
if len(args) < 1 && !topOptions.Latest {
return errors.Errorf("you must provide the name or id of a running pod")
}
if topOptions.Latest {
topOptions.Descriptors = args
} else {
topOptions.NameOrID = args[0]
topOptions.Descriptors = args[1:]
}
topResponse, err := registry.ContainerEngine().PodTop(context.Background(), topOptions)
if err != nil {
return err
}
w := tabwriter.NewWriter(os.Stdout, 5, 1, 3, ' ', 0)
for _, proc := range topResponse.Value {
if _, err := fmt.Fprintln(w, proc); err != nil {
return err
}
}
return w.Flush()
}
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