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package main
import (
"fmt"
"os"
"strings"
"text/tabwriter"
"github.com/containers/libpod/cmd/podman/cliconfig"
"github.com/containers/libpod/pkg/adapter"
"github.com/containers/libpod/pkg/util"
"github.com/pkg/errors"
"github.com/spf13/cobra"
)
var (
podTopCommand cliconfig.PodTopValues
podTopDescription = 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.
%s`, getDescriptorString())
_podTopCommand = &cobra.Command{
Use: "top [flags] CONTAINER [FORMAT-DESCRIPTORS]",
Short: "Display the running processes of containers in a pod",
Long: podTopDescription,
RunE: func(cmd *cobra.Command, args []string) error {
podTopCommand.InputArgs = args
podTopCommand.GlobalFlags = MainGlobalOpts
podTopCommand.Remote = remoteclient
return podTopCmd(&podTopCommand)
},
Example: `podman top ctrID
podman top --latest
podman top --latest pid seccomp args %C`,
}
)
func init() {
podTopCommand.Command = _podTopCommand
podTopCommand.SetHelpTemplate(HelpTemplate())
podTopCommand.SetUsageTemplate(UsageTemplate())
flags := podTopCommand.Flags()
flags.BoolVarP(&podTopCommand.Latest, "latest", "l", false, "Act on the latest pod podman is aware of")
flags.BoolVar(&podTopCommand.ListDescriptors, "list-descriptors", false, "")
markFlagHidden(flags, "list-descriptors")
}
func podTopCmd(c *cliconfig.PodTopValues) error {
var (
descriptors []string
)
args := c.InputArgs
if c.ListDescriptors {
descriptors, err := util.GetContainerPidInformationDescriptors()
if err != nil {
return err
}
fmt.Println(strings.Join(descriptors, "\n"))
return nil
}
if len(args) < 1 && !c.Latest {
return errors.Errorf("you must provide the name or id of a running pod")
}
runtime, err := adapter.GetRuntime(getContext(), &c.PodmanCommand)
if err != nil {
return errors.Wrapf(err, "error creating libpod runtime")
}
defer runtime.DeferredShutdown(false)
if c.Latest {
descriptors = args
} else {
descriptors = args[1:]
}
w := tabwriter.NewWriter(os.Stdout, 5, 1, 3, ' ', 0)
psOutput, err := runtime.PodTop(c, descriptors)
if err != nil {
return err
}
for _, proc := range psOutput {
if _, err := fmt.Fprintln(w, proc); err != nil {
return err
}
}
return w.Flush()
}
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