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ps.go
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ps.go
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// SPDX-License-Identifier: BSD-3-Clause
// Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
// Licensed under the BSD-3-Clause License (the "License").
// You may not use this file expect in compliance with the License.
package ps
import (
"context"
"fmt"
"strings"
machineapi "kraftkit.sh/api/machine/v1alpha1"
"kraftkit.sh/cmdfactory"
"kraftkit.sh/internal/tableprinter"
"kraftkit.sh/iostreams"
"kraftkit.sh/log"
mplatform "kraftkit.sh/machine/platform"
"github.com/MakeNowJust/heredoc"
"github.com/dustin/go-humanize"
"github.com/spf13/cobra"
)
type PsOptions struct {
Architecture string `long:"arch" short:"m" usage:"Filter the list by architecture"`
Long bool `long:"long" short:"l" usage:"Show more information"`
platform string
Quiet bool `long:"quiet" short:"q" usage:"Only display machine IDs"`
ShowAll bool `long:"all" short:"a" usage:"Show all machines (default shows just running)"`
Output string `long:"output" short:"o" usage:"Set output format. Options: table,yaml,json,full" default:"table"`
}
const (
MemoryMiB = 1024 * 1024
)
func NewCmd() *cobra.Command {
cmd, err := cmdfactory.New(&PsOptions{}, cobra.Command{
Short: "List running unikernels",
Use: "ps [FLAGS]",
Args: cobra.MaximumNArgs(0),
Aliases: []string{},
Long: "List running unikernels",
Example: heredoc.Doc(`
# List all running unikernels
$ kraft ps
# List all unikernels
$ kraft ps --all
# List all running unikernels with more information
$ kraft ps --long
`),
Annotations: map[string]string{
cmdfactory.AnnotationHelpGroup: "run",
},
})
if err != nil {
panic(err)
}
cmd.Flags().VarP(
cmdfactory.NewEnumFlag[mplatform.Platform](
mplatform.Platforms(),
mplatform.Platform("all"),
),
"plat",
"p",
"Set the platform virtual machine monitor driver.",
)
return cmd
}
func (opts *PsOptions) Pre(cmd *cobra.Command, _ []string) error {
opts.platform = cmd.Flag("plat").Value.String()
return nil
}
type PsEntry struct {
ID string
Name string
Kernel string
Args string
Created string
Status machineapi.MachineState
Mem string
Ports string
Arch string
Plat string
IPs []string
}
func (opts *PsOptions) Run(ctx context.Context, _ []string) error {
items, err := opts.PsTable(ctx)
if err != nil {
return err
}
return opts.PrintPsTable(ctx, items)
}
func (opts *PsOptions) PsTable(ctx context.Context) ([]PsEntry, error) {
var err error
var items []PsEntry
platform := mplatform.PlatformUnknown
var controller machineapi.MachineService
if opts.platform == "all" {
controller, err = mplatform.NewMachineV1alpha1ServiceIterator(ctx)
} else {
if opts.platform == "" || opts.platform == "auto" {
platform, _, err = mplatform.Detect(ctx)
if err != nil {
return nil, err
}
} else {
var ok bool
platform, ok = mplatform.PlatformsByName()[opts.platform]
if !ok {
return nil, fmt.Errorf("unknown platform driver: %s", opts.platform)
}
}
strategy, ok := mplatform.Strategies()[platform]
if !ok {
return nil, fmt.Errorf("unsupported platform driver: %s (contributions welcome!)", platform.String())
}
controller, err = strategy.NewMachineV1alpha1(ctx)
}
if err != nil {
return nil, err
}
machines, err := controller.List(ctx, &machineapi.MachineList{})
if err != nil {
return nil, err
}
for _, machine := range machines.Items {
if !opts.ShowAll && machine.Status.State != machineapi.MachineStateRunning {
continue
}
entry := PsEntry{
ID: string(machine.UID),
Name: machine.Name,
Args: strings.Join(machine.Spec.ApplicationArgs, " "),
Kernel: machine.Spec.Kernel,
Status: machine.Status.State,
Mem: fmt.Sprintf("%dMiB", machine.Spec.Resources.Requests.Memory().Value()/MemoryMiB),
Created: humanize.Time(machine.ObjectMeta.CreationTimestamp.Time),
Ports: machine.Spec.Ports.String(),
Arch: machine.Spec.Architecture,
Plat: machine.Spec.Platform,
IPs: []string{},
}
for _, net := range machine.Spec.Networks {
for _, iface := range net.Interfaces {
entry.IPs = append(entry.IPs, iface.Spec.CIDR)
}
}
items = append(items, entry)
}
return items, nil
}
func (opts *PsOptions) PrintPsTable(ctx context.Context, items []PsEntry) error {
err := iostreams.G(ctx).StartPager()
if err != nil {
log.G(ctx).Errorf("error starting pager: %v", err)
}
defer iostreams.G(ctx).StopPager()
cs := iostreams.G(ctx).ColorScheme()
table, err := tableprinter.NewTablePrinter(ctx,
tableprinter.WithMaxWidth(iostreams.G(ctx).TerminalWidth()),
tableprinter.WithOutputFormatFromString(opts.Output),
)
if err != nil {
return err
}
// Header row
if opts.Long {
table.AddField("MACHINE ID", cs.Bold)
}
table.AddField("NAME", cs.Bold)
table.AddField("KERNEL", cs.Bold)
table.AddField("ARGS", cs.Bold)
table.AddField("CREATED", cs.Bold)
table.AddField("STATUS", cs.Bold)
table.AddField("MEM", cs.Bold)
if opts.Long {
table.AddField("PORTS", cs.Bold)
table.AddField("IP", cs.Bold)
table.AddField("ARCH", cs.Bold)
}
table.AddField("PLAT", cs.Bold)
table.EndRow()
for _, item := range items {
if opts.Long {
table.AddField(item.ID, nil)
}
table.AddField(item.Name, nil)
table.AddField(item.Kernel, nil)
table.AddField(item.Args, nil)
table.AddField(item.Created, nil)
table.AddField(item.Status.String(), nil)
table.AddField(item.Mem, nil)
if opts.Long {
table.AddField(item.Ports, nil)
table.AddField(strings.Join(item.IPs, ","), nil)
table.AddField(item.Arch, nil)
table.AddField(item.Plat, nil)
} else {
table.AddField(fmt.Sprintf("%s/%s", item.Plat, item.Arch), nil)
}
table.EndRow()
}
return table.Render(iostreams.G(ctx).Out)
}