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package containers
import (
"encoding/json"
"fmt"
"os"
"strings"
"text/tabwriter"
"text/template"
"time"
tm "github.com/buger/goterm"
"github.com/containers/buildah/pkg/formats"
"github.com/containers/libpod/cmd/podmanV2/registry"
"github.com/containers/libpod/pkg/domain/entities"
"github.com/pkg/errors"
"github.com/spf13/cobra"
)
var (
psDescription = "Prints out information about the containers"
psCommand = &cobra.Command{
Use: "ps",
Args: checkFlags,
Short: "List containers",
Long: psDescription,
RunE: ps,
PreRunE: preRunE,
Example: `podman ps -a
podman ps -a --format "{{.ID}} {{.Image}} {{.Labels}} {{.Mounts}}"
podman ps --size --sort names`,
}
)
var (
listOpts = entities.ContainerListOptions{
Filters: make(map[string][]string),
}
filters []string
noTrunc bool
defaultHeaders string = "CONTAINER ID\tIMAGE\tCOMMAND\tCREATED\tSTATUS\tPORTS\tNAMES"
)
func init() {
registry.Commands = append(registry.Commands, registry.CliCommand{
Mode: []entities.EngineMode{entities.ABIMode, entities.TunnelMode},
Command: psCommand,
})
flags := psCommand.Flags()
flags.BoolVarP(&listOpts.All, "all", "a", false, "Show all the containers, default is only running containers")
flags.StringSliceVarP(&filters, "filter", "f", []string{}, "Filter output based on conditions given")
flags.StringVar(&listOpts.Format, "format", "", "Pretty-print containers to JSON or using a Go template")
flags.IntVarP(&listOpts.Last, "last", "n", -1, "Print the n last created containers (all states)")
flags.BoolVarP(&listOpts.Latest, "latest", "l", false, "Show the latest container created (all states)")
flags.BoolVar(&listOpts.Namespace, "namespace", false, "Display namespace information")
flags.BoolVar(&listOpts.Namespace, "ns", false, "Display namespace information")
flags.BoolVar(&noTrunc, "no-trunc", false, "Display the extended information")
flags.BoolVarP(&listOpts.Pod, "pod", "p", false, "Print the ID and name of the pod the containers are associated with")
flags.BoolVarP(&listOpts.Quiet, "quiet", "q", false, "Print the numeric IDs of the containers only")
flags.BoolVarP(&listOpts.Size, "size", "s", false, "Display the total file sizes")
flags.StringVar(&listOpts.Sort, "sort", "created", "Sort output by command, created, id, image, names, runningfor, size, or status")
flags.BoolVar(&listOpts.Sync, "sync", false, "Sync container state with OCI runtime")
flags.UintVarP(&listOpts.Watch, "watch", "w", 0, "Watch the ps output on an interval in seconds")
if registry.IsRemote() {
_ = flags.MarkHidden("latest")
}
}
func checkFlags(c *cobra.Command, args []string) error {
// latest, and last are mutually exclusive.
if listOpts.Last >= 0 && listOpts.Latest {
return errors.Errorf("last and latest are mutually exclusive")
}
// Filter on status forces all
for _, filter := range filters {
splitFilter := strings.SplitN(filter, "=", 2)
if strings.ToLower(splitFilter[0]) == "status" {
listOpts.All = true
break
}
}
// Quiet conflicts with size and namespace and is overridden by a Go
// template.
if listOpts.Quiet {
if listOpts.Size || listOpts.Namespace {
return errors.Errorf("quiet conflicts with size and namespace")
}
if c.Flag("format").Changed && listOpts.Format != formats.JSONString {
// Quiet is overridden by Go template output.
listOpts.Quiet = false
}
}
// Size and namespace conflict with each other
if listOpts.Size && listOpts.Namespace {
return errors.Errorf("size and namespace options conflict")
}
if listOpts.Watch > 0 && listOpts.Latest {
return errors.New("the watch and latest flags cannot be used together")
}
return nil
}
func jsonOut(responses []entities.ListContainer) error {
b, err := json.MarshalIndent(responses, "", " ")
if err != nil {
return err
}
fmt.Println(string(b))
return nil
}
func quietOut(responses []entities.ListContainer) error {
for _, r := range responses {
id := r.ID
if !noTrunc {
id = id[0:12]
}
fmt.Println(id)
}
return nil
}
func getResponses() ([]entities.ListContainer, error) {
responses, err := registry.ContainerEngine().ContainerList(registry.GetContext(), listOpts)
if err != nil {
return nil, err
}
if len(listOpts.Sort) > 0 {
responses, err = entities.SortPsOutput(listOpts.Sort, responses)
if err != nil {
return nil, err
}
}
return responses, nil
}
func ps(cmd *cobra.Command, args []string) error {
for _, f := range filters {
split := strings.SplitN(f, "=", 2)
if len(split) == 1 {
return errors.Errorf("invalid filter %q", f)
}
listOpts.Filters[split[0]] = append(listOpts.Filters[split[0]], split[1])
}
responses, err := getResponses()
if err != nil {
return err
}
if len(listOpts.Sort) > 0 {
responses, err = entities.SortPsOutput(listOpts.Sort, responses)
if err != nil {
return err
}
}
if listOpts.Format == "json" {
return jsonOut(responses)
}
if listOpts.Quiet {
return quietOut(responses)
}
headers, row := createPsOut()
if cmd.Flag("format").Changed {
row = listOpts.Format
if !strings.HasPrefix(row, "\n") {
row += "\n"
}
}
format := "{{range . }}" + row + "{{end}}"
if !listOpts.Quiet && !cmd.Flag("format").Changed {
format = headers + format
}
tmpl, err := template.New("listContainers").Parse(format)
if err != nil {
return err
}
w := tabwriter.NewWriter(os.Stdout, 8, 2, 2, ' ', 0)
if listOpts.Watch > 0 {
for {
tm.Clear()
tm.MoveCursor(1, 1)
tm.Flush()
responses, err := getResponses()
if err != nil {
return err
}
if err := tmpl.Execute(w, responses); err != nil {
return nil
}
if err := w.Flush(); err != nil {
return err
}
time.Sleep(time.Duration(listOpts.Watch) * time.Second)
tm.Clear()
tm.MoveCursor(1, 1)
tm.Flush()
}
} else if listOpts.Watch < 1 {
if err := tmpl.Execute(w, responses); err != nil {
return err
}
return w.Flush()
}
return nil
}
func createPsOut() (string, string) {
var row string
if listOpts.Namespace {
headers := "CONTAINER ID\tNAMES\tPID\tCGROUPNS\tIPC\tMNT\tNET\tPIDN\tUSERNS\tUTS\n"
row := "{{.ID}}\t{{.Names}}\t{{.Pid}}\t{{.Namespaces.Cgroup}}\t{{.Namespaces.IPC}}\t{{.Namespaces.MNT}}\t{{.Namespaces.NET}}\t{{.Namespaces.PIDNS}}\t{{.Namespaces.User}}\t{{.Namespaces.UTS}}\n"
return headers, row
}
headers := defaultHeaders
if noTrunc {
row += "{{.ID}}"
} else {
row += "{{slice .ID 0 12}}"
}
row += "\t{{.Image}}\t{{.Command}}\t{{.CreatedHuman}}\t{{.State}}\t{{.Ports}}\t{{.Names}}"
if listOpts.Pod {
headers += "\tPOD ID\tPODNAME"
if noTrunc {
row += "\t{{.Pod}}"
} else {
row += "\t{{slice .Pod 0 12}}"
}
row += "\t{{.PodName}}"
}
if listOpts.Size {
headers += "\tSIZE"
row += "\t{{.Size}}"
}
if !strings.HasSuffix(headers, "\n") {
headers += "\n"
}
if !strings.HasSuffix(row, "\n") {
row += "\n"
}
return headers, row
}
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