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v1alpha1.go
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v1alpha1.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 except in compliance with the License.
package qemu
import (
"context"
"errors"
"fmt"
"io"
"io/fs"
"net"
"os"
"path/filepath"
"reflect"
"strconv"
"strings"
"time"
zip "api.zip"
"github.com/acorn-io/baaah/pkg/merr"
"github.com/mitchellh/mapstructure"
goprocess "github.com/shirou/gopsutil/v3/process"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/resource"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/util/uuid"
machinev1alpha1 "kraftkit.sh/api/machine/v1alpha1"
"kraftkit.sh/config"
"kraftkit.sh/exec"
"kraftkit.sh/internal/logtail"
"kraftkit.sh/internal/retrytimeout"
"kraftkit.sh/machine/network/macaddr"
"kraftkit.sh/machine/qemu/qmp"
qmpapi "kraftkit.sh/machine/qemu/qmp/v7alpha2"
"kraftkit.sh/unikraft/export/v0/ukargparse"
"kraftkit.sh/unikraft/export/v0/uknetdev"
"kraftkit.sh/unikraft/export/v0/vfscore"
)
// machineV1alpha1Service ...
type machineV1alpha1Service struct {
eopts []exec.ExecOption
}
// NewMachineV1alpha1Service implements kraftkit.sh/machine/platform.NewStrategyConstructor
func NewMachineV1alpha1Service(ctx context.Context, opts ...any) (machinev1alpha1.MachineService, error) {
service := machineV1alpha1Service{}
for _, opt := range opts {
qopt, ok := opt.(MachineServiceV1alpha1Option)
if !ok {
panic("cannot apply non-MachineServiceV1alpha1Option type methods")
}
if err := qopt(&service); err != nil {
return nil, err
}
}
return &service, nil
}
// Create implements kraftkit.sh/api/machine/v1alpha1.MachineService.Create
func (service *machineV1alpha1Service) Create(ctx context.Context, machine *machinev1alpha1.Machine) (*machinev1alpha1.Machine, error) {
if machine.Status.KernelPath == "" {
return machine, fmt.Errorf("empty kernel path")
}
if _, err := os.Stat(machine.Status.KernelPath); err != nil && os.IsNotExist(err) {
return machine, fmt.Errorf("supplied kernel path does not exist: %s", machine.Status.KernelPath)
}
var bin string
switch machine.Spec.Architecture {
case "x86_64", "amd64":
bin = QemuSystemX86
case "arm":
bin = QemuSystemArm
case "arm64":
bin = QemuSystemAarch64
default:
return nil, fmt.Errorf("unsupported architecture: %s", machine.Spec.Architecture)
}
if config.G[config.KraftKit](ctx).Qemu != "" {
bin = config.G[config.KraftKit](ctx).Qemu
}
// Determine the version of QEMU so as to both determine whether it is a
// suitable version and to adjust the supplied command-line arguments.
qemuVersion, err := GetQemuVersionFromBin(ctx, bin)
if err != nil {
return machine, err
}
if qemuVersion.LessThan(QemuVersion4_2_0) {
return machine, fmt.Errorf("unsupported QEMU version: %s: please upgrade to a newer version", qemuVersion.String())
}
// Determine the QEMU machine type to use
qemuAccels, err := GetQemuMachineAccelFromBin(ctx, bin)
if err != nil {
return machine, err
}
if machine.Spec.Emulation {
emulation := false
for _, accel := range qemuAccels {
if accel == QemuMachineAccelTCG {
emulation = true
break
}
}
if !emulation {
return machine, fmt.Errorf("emulation requested but TCG is not available")
}
} else {
platform := false
for _, accel := range qemuAccels {
if accel == QemuMachineAccelKVM {
platform = true
break
}
}
if !platform {
return machine, fmt.Errorf("platform %s requested but it's not available", QemuMachineAccelKVM)
}
}
if machine.ObjectMeta.UID == "" {
machine.ObjectMeta.UID = uuid.NewUUID()
}
machine.Status.State = machinev1alpha1.MachineStateUnknown
if len(machine.Status.StateDir) == 0 {
machine.Status.StateDir = filepath.Join(config.G[config.KraftKit](ctx).RuntimeDir, string(machine.ObjectMeta.UID))
}
if err := os.MkdirAll(machine.Status.StateDir, fs.ModeSetgid|0o775); err != nil {
return machine, err
}
// Set and create the log file for this machine
if len(machine.Status.LogFile) == 0 {
machine.Status.LogFile = filepath.Join(machine.Status.StateDir, "machine.log")
}
if machine.Spec.Resources.Requests == nil {
machine.Spec.Resources.Requests = make(corev1.ResourceList, 2)
}
if machine.Spec.Resources.Requests.Memory().Value() == 0 {
quantity, err := resource.ParseQuantity("64Mi")
if err != nil {
machine.Status.State = machinev1alpha1.MachineStateFailed
return machine, err
}
machine.Spec.Resources.Requests[corev1.ResourceMemory] = quantity
}
if machine.Spec.Resources.Requests.Cpu().Value() == 0 {
quantity, err := resource.ParseQuantity("1")
if err != nil {
machine.Status.State = machinev1alpha1.MachineStateFailed
return machine, err
}
machine.Spec.Resources.Requests[corev1.ResourceCPU] = quantity
}
qopts := []QemuOption{
WithDaemonize(true),
WithNoGraphic(true),
WithPidFile(filepath.Join(machine.Status.StateDir, "machine.pid")),
WithNoReboot(true),
WithNoStart(true),
WithName(string(machine.ObjectMeta.UID)),
WithKernel(machine.Status.KernelPath),
WithVGA(QemuVGANone),
WithMemory(QemuMemory{
// The value returned from Memory() is in bytes
Size: uint64(machine.Spec.Resources.Requests.Memory().Value() / QemuMemoryScale),
Unit: QemuMemoryUnitMB,
}),
// Create a QMP connection solely for manipulating the machine
WithQMP(QemuHostCharDevUnix{
SocketDir: machine.Status.StateDir,
Name: "qemu_control",
NoWait: true,
Server: true,
}),
// Create a QMP connection solely for listening to events
WithQMP(QemuHostCharDevUnix{
SocketDir: machine.Status.StateDir,
Name: "qemu_events",
NoWait: true,
Server: true,
}),
WithSerial(QemuHostCharDevFile{
Monitor: false,
Filename: machine.Status.LogFile,
}),
WithMonitor(QemuHostCharDevUnix{
SocketDir: machine.Status.StateDir,
Name: "qemu_mon",
NoWait: true,
Server: true,
}),
WithSMP(QemuSMP{
CPUs: uint64(machine.Spec.Resources.Requests.Cpu().Value()),
Threads: 1,
Sockets: 1,
}),
WithVGA(QemuVGANone),
WithRTC(QemuRTC{
Base: QemuRTCBaseUtc,
}),
WithDisplay(QemuDisplayNone{}),
WithParallel(QemuHostCharDevNone{}),
}
// TODO: Parse Rootfs types
if len(machine.Status.InitrdPath) > 0 {
qopts = append(qopts,
WithInitRd(machine.Status.InitrdPath),
)
}
kernelArgs, err := ukargparse.Parse(machine.Spec.KernelArgs...)
if err != nil {
return machine, err
}
hostnetCounter := 0
// Start MAC addresses iteratively. Each interface will have the last
// hexdecimal byte increase by 1 starting at 1, allowing for easy-to-spot
// interface IDs from the MAC address. The return value below returns `:00`
// as the last byte.
startMac, err := macaddr.GenerateMacAddress(true)
if err != nil {
return machine, err
}
if len(machine.Spec.Networks) > 0 {
// Iterate over each interface of each network interface associated with
// this machine and attach it as a device.
for _, network := range machine.Spec.Networks {
for _, iface := range network.Interfaces {
mac := iface.Spec.MacAddress
if mac == "" {
// Increase the MAC address value by 1 such that we are able to
// identify interface IDs.
startMac = macaddr.IncrementMacAddress(startMac)
mac = startMac.String()
}
hostnetid := fmt.Sprintf("hostnet%d", hostnetCounter)
hostnetCounter++
qopts = append(qopts,
// TODO(nderjung): The network device should be customizable based on
// the network spec or machine spec. Additional insight can be provided
// by inspecting the KConfig options. Potentially the MachineSpec is
// updated to reflect different systems or provide access to the
// KConfig values.
WithDevice(QemuDeviceVirtioNetPci{
Netdev: hostnetid,
Mac: mac,
}),
WithNetDevice(QemuNetDevTap{
Id: hostnetid,
Ifname: iface.Spec.IfName,
Br: network.IfName,
Script: "no", // Disable execution
Downscript: "no", // Disable execution
}),
)
kernelArgs = append(kernelArgs,
uknetdev.NewParamIp().WithValue(uknetdev.NetdevIp{
CIDR: iface.Spec.CIDR,
Gateway: network.Gateway,
DNS0: iface.Spec.DNS0,
DNS1: iface.Spec.DNS1,
Hostname: iface.Spec.Hostname,
Domain: iface.Spec.Domain,
}),
)
}
}
}
if len(machine.Spec.Ports) > 0 {
for _, port := range machine.Spec.Ports {
mac := port.MacAddress
if mac == "" {
startMac = macaddr.IncrementMacAddress(startMac)
mac = startMac.String()
}
hostnetid := fmt.Sprintf("hostnet%d", hostnetCounter)
hostnetCounter++
qopts = append(qopts,
WithDevice(QemuDeviceVirtioNetPci{
Mac: mac,
Netdev: hostnetid,
}),
WithNetDevice(QemuNetDevUser{
Id: hostnetid,
Hostfwd: fmt.Sprintf("%s::%d-:%d", port.Protocol, port.HostPort, port.MachinePort),
}),
)
}
}
var fstab []string
for i, vol := range machine.Spec.Volumes {
switch vol.Spec.Driver {
case "9pfs":
hvirtioid := fmt.Sprintf("hvirtio%d", i+1)
mounttag := fmt.Sprintf("fs%d", i+1)
qopts = append(qopts,
WithFsDevice(QemuFsDevLocal{
SecurityModel: QemuFsDevLocalSecurityModelPassthrough,
Id: hvirtioid,
Path: vol.Spec.Source,
}),
WithDevice(QemuDeviceVirtio9pPci{
Fsdev: hvirtioid,
MountTag: mounttag,
}),
)
fstab = append(fstab, vfscore.NewFstabEntry(
mounttag,
vol.Spec.Destination,
vol.Spec.Driver,
// TODO(nderjung): Options (such as ro/rw) are yet supported by
// Unikraft:
"",
"",
// By default, create the directory if it does not exist when mounting.
"mkmp",
).String())
case "initrd":
fstab = append(fstab, vfscore.NewFstabEntry(
"initrd0",
vol.Spec.Destination,
"extract",
"",
"",
"",
).String())
default:
return machine, fmt.Errorf("unsupported QEMU volume driver: %v", vol.Spec.Driver)
}
}
if len(fstab) > 0 {
kernelArgs = append(kernelArgs,
vfscore.ParamVfsFstab.WithValue(fstab),
)
}
// TODO(nderjung): This is standard "Unikraft" positional argument syntax
// (kernel args and application arguments separated with "--"). The resulting
// string should be standardized through a central function.
args := kernelArgs.Strings()
if len(args) > 0 {
args = append(args, "--")
}
// We do not need to append the kernel path since it is already provided
// by default by QEMU. QEMU sets arg[0] to the absolute path of the kernel
// image. If people want to change this they need to modify this script
// 'qemu-binfmt-conf.sh' when installing QEMU.
// args = append(args, filepath.Base(machine.Status.KernelPath))
args = append(args, machine.Spec.ApplicationArgs...)
qopts = append(qopts, WithAppend(args...))
switch machine.Spec.Architecture {
case "x86_64", "amd64":
qopts = append(qopts,
WithDevice(QemuDevicePvpanic{}),
)
if machine.Spec.Emulation {
qopts = append(qopts,
WithMachine(QemuMachine{
Type: QemuMachineTypePC,
}),
WithCPU(QemuCPU{
CPU: QemuCPUX86Qemu64,
On: QemuCPUFeatures{QemuCPUFeaturePdpe1gb},
Off: QemuCPUFeatures{QemuCPUFeatureVmx, QemuCPUFeatureSvm},
}),
)
} else {
qopts = append(qopts,
WithEnableKVM(true),
WithMachine(QemuMachine{
Type: QemuMachineTypePC,
Accelerators: []QemuMachineAccelerator{QemuMachineAccelKVM},
}),
WithCPU(QemuCPU{
CPU: QemuCPUX86Host,
On: QemuCPUFeatures{QemuCPUFeatureX2apic},
Off: QemuCPUFeatures{QemuCPUFeaturePmu},
}),
)
}
if qemuVersion.LessThan(QemuVersion8_0_0) {
qopts = append(qopts,
WithDevice(QemuDeviceSga{}),
)
}
case "arm", "arm64":
qopts = append(qopts,
WithMachine(QemuMachine{
Type: QemuMachineTypeVirt,
}),
WithCPU(QemuCPU{
CPU: QemuCPUArmCortexA53,
}),
)
default:
return nil, fmt.Errorf("unsupported architecture: %s", machine.Spec.Architecture)
}
// Create a log file just for the QEMU process which can be used to debug
// issues when starting the VMM.
qemuLogFile := filepath.Join(machine.Status.StateDir, "qemu.log")
fi, err := os.Create(qemuLogFile)
if err != nil {
return machine, err
}
defer fi.Close()
service.eopts = append(service.eopts,
exec.WithStdout(fi),
)
qcfg, err := NewQemuConfig(qopts...)
if err != nil {
machine.Status.State = machinev1alpha1.MachineStateFailed
return machine, fmt.Errorf("could not generate QEMU config: %v", err)
}
machine.Status.PlatformConfig = *qcfg
e, err := exec.NewExecutable(bin, *qcfg)
if err != nil {
machine.Status.State = machinev1alpha1.MachineStateFailed
return machine, fmt.Errorf("could not prepare QEMU executable: %v", err)
}
process, err := exec.NewProcessFromExecutable(e, service.eopts...)
if err != nil {
machine.Status.State = machinev1alpha1.MachineStateFailed
return machine, fmt.Errorf("could not prepare QEMU process: %v", err)
}
machine.CreationTimestamp = metav1.Now()
// Start and also wait for the process to be released, this ensures the
// program is actively being executed.
if err := process.StartAndWait(ctx); err != nil {
machine.Status.State = machinev1alpha1.MachineStateFailed
// Propagate the contents of the QEMU log file as an error
if errLog, err2 := os.ReadFile(qemuLogFile); err2 == nil {
err = errors.Join(fmt.Errorf(strings.TrimSpace(string(errLog))), err)
}
return machine, fmt.Errorf("could not start and wait for QEMU process: %v", err)
}
machine.Status.State = machinev1alpha1.MachineStateCreated
return machine, nil
}
// Update implements kraftkit.sh/api/machine/v1alpha1.MachineService
func (service *machineV1alpha1Service) Update(ctx context.Context, machine *machinev1alpha1.Machine) (*machinev1alpha1.Machine, error) {
panic("not implemented: kraftkit.sh/machine/qemu.machineV1alpha1Service.Update")
}
// getQEMUConfigFromPlatformConfig converts the provided platformConfig
// interface into meaningful QemuConfig.
func getQEMUConfigFromPlatformConfig(platformConfig interface{}) (*QemuConfig, error) {
qcfgptr, ok := platformConfig.(*QemuConfig)
if ok {
return qcfgptr, nil
}
// If we cannot directly cast it to the structure, attempt to decode a
// mapstructure version of the same configuration.
var qcfg QemuConfig
decoder, err := mapstructure.NewDecoder(&mapstructure.DecoderConfig{
Result: &qcfg,
DecodeHook: mapstructure.ComposeDecodeHookFunc(
// Directly embbed a less-erroring version of StringToIPHookFunc[0] which
// does not return an error when parsing an IP that returns nil.
// [0]: https://github.com/mitchellh/mapstructure/blob/bf980b35cac4dfd34e05254ee5aba086504c3f96/decode_hooks.go#L141-L163
func(f reflect.Type, t reflect.Type, data interface{}) (interface{}, error) {
if f.Kind() != reflect.String {
return data, nil
}
if t != reflect.TypeOf(net.IP{}) {
return data, nil
}
// Instead of parsing it, just return an empty net.IP structure, since
// we do not yet set IP addresses with Firecracker's configuration.
return net.IP{}, nil
},
),
})
if err != nil {
return nil, err
}
if err := decoder.Decode(platformConfig); err != nil {
return nil, err
}
return &qcfg, nil
}
func qmpClientHandshake(conn *net.Conn) (*qmpapi.QEMUMachineProtocolClient, error) {
qmpClient := qmpapi.NewQEMUMachineProtocolClient(*conn)
greeting, err := qmpClient.Greeting()
if err != nil {
return nil, err
}
_, err = qmpClient.Capabilities(qmpapi.CapabilitiesRequest{
Arguments: qmpapi.CapabilitiesRequestArguments{
Enable: greeting.Qmp.Capabilities,
},
})
if err != nil {
return nil, err
}
return qmpClient, nil
}
func (service *machineV1alpha1Service) QMPClient(ctx context.Context, machine *machinev1alpha1.Machine) (*qmpapi.QEMUMachineProtocolClient, error) {
qcfg, err := getQEMUConfigFromPlatformConfig(machine.Status.PlatformConfig)
if err != nil {
return nil, err
}
// Always use index 0 for manipulating the machine
conn, err := qcfg.QMP[0].Connection()
if err != nil {
return nil, err
}
return qmpClientHandshake(&conn)
}
func processFromPidFile(pidFile string) (*goprocess.Process, error) {
pidData, err := os.ReadFile(pidFile)
if err != nil {
return nil, fmt.Errorf("could not read pid file: %v", err)
}
pid, err := strconv.ParseUint(strings.TrimSpace(string(pidData)), 10, 64)
if err != nil {
return nil, fmt.Errorf("could not convert pid string \"%s\" to uint64: %v", pidData, err)
}
process, err := goprocess.NewProcess(int32(pid))
if err != nil {
return nil, fmt.Errorf("could not look up process %d: %v", pid, err)
}
return process, nil
}
// Watch implements kraftkit.sh/api/machine/v1alpha1.MachineService
func (service *machineV1alpha1Service) Watch(ctx context.Context, machine *machinev1alpha1.Machine) (chan *machinev1alpha1.Machine, chan error, error) {
events := make(chan *machinev1alpha1.Machine)
errs := make(chan error)
qcfg, ok := machine.Status.PlatformConfig.(QemuConfig)
if !ok {
return nil, nil, fmt.Errorf("cannot cast QEMU platform configuration from machine status")
}
// Always use index 1 for monitoring events
conn, err := qcfg.QMP[1].Connection()
if err != nil {
return nil, nil, err
}
// Perform the handshake
_, err = qmpClientHandshake(&conn)
if err != nil {
return nil, nil, err
}
monitor, err := qmp.NewQMPEventMonitor(conn,
qmpapi.EventTypes(),
nil,
)
if err != nil {
return nil, nil, err
}
// firstCall is used to initialize the channel with the current state of the
// machine, so that it can be immediately acted upon.
firstCall := true
go func() {
accept:
for {
// First check if the context has been cancelled
select {
case <-ctx.Done():
break accept
default:
}
// Check the current state
machine, err := service.Get(ctx, machine)
if err != nil {
errs <- err
continue
}
// Initialize with the current state
if firstCall {
events <- machine
firstCall = false
}
// Listen for changes in state
event, err := monitor.Accept()
if err != nil {
errs <- err
continue
}
// Send the event through the channel
switch event.Event {
case qmpapi.EVENT_STOP, qmpapi.EVENT_SUSPEND, qmpapi.EVENT_POWERDOWN:
machine.Status.State = machinev1alpha1.MachineStatePaused
events <- machine
case qmpapi.EVENT_RESUME:
machine.Status.State = machinev1alpha1.MachineStateRunning
events <- machine
case qmpapi.EVENT_RESET, qmpapi.EVENT_WAKEUP:
machine.Status.State = machinev1alpha1.MachineStateRestarting
events <- machine
case qmpapi.EVENT_SHUTDOWN:
machine.Status.State = machinev1alpha1.MachineStateExited
events <- machine
if !qcfg.NoShutdown {
break accept
}
case qmpapi.EVENT_GUEST_PANICKED:
machine.Status.State = machinev1alpha1.MachineStateErrored
events <- machine
if !qcfg.NoShutdown {
break accept
}
default:
errs <- fmt.Errorf("unsupported event: %s", event.Event)
}
}
}()
return events, errs, nil
}
// Start implements kraftkit.sh/api/machine/v1alpha1.MachineService
func (service *machineV1alpha1Service) Start(ctx context.Context, machine *machinev1alpha1.Machine) (*machinev1alpha1.Machine, error) {
qmpClient, err := service.QMPClient(ctx, machine)
if err != nil && strings.HasSuffix(err.Error(), "connect: no such file or directory") {
machine, err = service.Create(ctx, machine)
if err != nil {
return machine, err
}
qmpClient, err = service.QMPClient(ctx, machine)
}
if err != nil {
return machine, fmt.Errorf("could not start qemu instance: %v", err)
}
defer qmpClient.Close()
_, err = qmpClient.Cont(qmpapi.ContRequest{})
if err != nil {
return machine, err
}
qcfg, ok := machine.Status.PlatformConfig.(QemuConfig)
if !ok {
return machine, fmt.Errorf("cannot cast QEMU platform configuration from machine status")
}
process, err := processFromPidFile(qcfg.PidFile)
if err != nil {
return machine, err
}
machine.Status.Pid = process.Pid
machine.Status.State = machinev1alpha1.MachineStateRunning
machine.Status.StartedAt = time.Now()
return machine, nil
}
// Pause implements kraftkit.sh/api/machine/v1alpha1.MachineService
func (service *machineV1alpha1Service) Pause(ctx context.Context, machine *machinev1alpha1.Machine) (*machinev1alpha1.Machine, error) {
qmpClient, err := service.QMPClient(ctx, machine)
if err != nil {
return machine, fmt.Errorf("could not pause qemu instance: %v", err)
}
defer qmpClient.Close()
_, err = qmpClient.Stop(qmpapi.StopRequest{})
if err != nil {
return machine, err
}
machine.Status.State = machinev1alpha1.MachineStatePaused
return machine, nil
}
// Logs implements kraftkit.sh/api/machine/v1alpha1.MachineService
func (service *machineV1alpha1Service) Logs(ctx context.Context, machine *machinev1alpha1.Machine) (chan string, chan error, error) {
out, errOut, err := logtail.NewLogTail(ctx, machine.Status.LogFile)
if err != nil {
return nil, nil, err
}
qcfg, ok := machine.Status.PlatformConfig.(QemuConfig)
if !ok {
return nil, nil, fmt.Errorf("cannot cast QEMU platform configuration from machine status")
}
// Wait and trim the preamble from the logs before returning
for {
select {
case line := <-out:
if !qcfg.ShowSGABiosPreamble && machine.Spec.Architecture == "x86_64" {
if strings.Contains(line, "Booting from ") {
qcfg.ShowSGABiosPreamble = true
machine.Status.PlatformConfig = qcfg
}
continue
}
return out, errOut, nil
case err := <-errOut:
if err != io.EOF {
return nil, nil, fmt.Errorf("reading log: %w", err)
}
case <-ctx.Done():
return out, errOut, nil
}
}
}
// Get implements kraftkit.sh/api/machine/v1alpha1/MachineService.Get
func (service *machineV1alpha1Service) Get(ctx context.Context, machine *machinev1alpha1.Machine) (*machinev1alpha1.Machine, error) {
state := machinev1alpha1.MachineStateUnknown
savedState := machine.Status.State
qcfg, ok := machine.Status.PlatformConfig.(QemuConfig)
if !ok {
return machine, fmt.Errorf("cannot read QEMU platform configuration from machine status")
}
// Set the cpu and memory resources
// TODO(craciunouc): This is a temporary solution until we have proper
// un/marshalling of the resources (and all structures).
machine.Spec.Resources.Requests[corev1.ResourceCPU] = resource.MustParse("1")
// Backwards compatibility with older runs
memory := "0Mi"
if qcfg.Memory.String() != "" {
memory = strings.SplitN(qcfg.Memory.String(), "=", 2)[1]
}
machine.Spec.Resources.Requests[corev1.ResourceMemory] = resource.MustParse(memory)
// Check if the process is alive, which ultimately indicates to us whether we
// able to speak to the exposed QMP socket
activeProcess := false
if process, err := processFromPidFile(qcfg.PidFile); err == nil {
activeProcess, err = process.IsRunning()
if err != nil {
state = machinev1alpha1.MachineStateExited
}
}
exitedAt := machine.Status.ExitedAt
exitCode := machine.Status.ExitCode
defer func() {
if exitCode >= 0 && machine.Status.ExitedAt.IsZero() {
exitedAt = time.Now()
}
// Update the machine config with the latest values if they are different from
// what we have on record
if machine.Status.ExitedAt != exitedAt || machine.Status.ExitCode != exitCode {
machine.Status.ExitedAt = exitedAt
machine.Status.ExitCode = exitCode
}
// Set the start time to now if it was not previously set
if machine.Status.StartedAt.IsZero() && state == machinev1alpha1.MachineStateRunning {
machine.Status.StartedAt = time.Now()
}
// Finally, save the state if it is different from the what we have on
// record
if state != machinev1alpha1.MachineStateUnknown && state != savedState {
machine.Status.State = state
}
}()
if !activeProcess {
state = machinev1alpha1.MachineStateExited
if savedState == machinev1alpha1.MachineStateRunning {
exitCode = 1
}
return machine, nil
}
qmpClient, err := service.QMPClient(ctx, machine)
if err != nil && errors.Is(err, os.ErrNotExist) {
state = machinev1alpha1.MachineStateExited
exitCode = 1
return machine, nil
} else if err != nil {
return machine, fmt.Errorf("could not attach to QMP client: %v", err)
}
defer qmpClient.Close()
// Grab the actual state of the machine by querying QMP
status, err := qmpClient.QueryStatus(qmpapi.QueryStatusRequest{})
if err != nil {
// We cannot amend the status at this point, even if the process is
// alive, since it is not an indicator of the state of the VM, only of the
// VMM. So we return what we already know via LookupMachineConfig.
return machine, fmt.Errorf("could not query machine status via QMP: %v", err)
}
// Map the QMP status to supported machine states
switch status.Return.Status {
case qmpapi.RUN_STATE_GUEST_PANICKED:
state = machinev1alpha1.MachineStateErrored
exitCode = 1
case qmpapi.RUN_STATE_INTERNAL_ERROR, qmpapi.RUN_STATE_IO_ERROR:
state = machinev1alpha1.MachineStateFailed
exitCode = 1
case qmpapi.RUN_STATE_PAUSED:
state = machinev1alpha1.MachineStatePaused
exitCode = -1
case qmpapi.RUN_STATE_RUNNING:
state = machinev1alpha1.MachineStateRunning
exitCode = -1
case qmpapi.RUN_STATE_SHUTDOWN:
state = machinev1alpha1.MachineStateExited
exitCode = 0
case qmpapi.RUN_STATE_SUSPENDED:
state = machinev1alpha1.MachineStateSuspended
exitCode = -1
default:
// qmpapi.RUN_STATE_SAVE_VM,
// qmpapi.RUN_STATE_PRELAUNCH,
// qmpapi.RUN_STATE_RESTORE_VM,
// qmpapi.RUN_STATE_WATCHDOG,
state = machinev1alpha1.MachineStateUnknown
exitCode = -1
}
return machine, nil
}
// List implements kraftkit.sh/api/machine/v1alpha1.MachineService.List
func (service *machineV1alpha1Service) List(ctx context.Context, machines *machinev1alpha1.MachineList) (*machinev1alpha1.MachineList, error) {
cached := machines.Items
machines.Items = []zip.Object[machinev1alpha1.MachineSpec, machinev1alpha1.MachineStatus]{}
// Iterate through each machine and grab the latest status
for _, machine := range cached {
machine, err := service.Get(ctx, &machine)
if err != nil {
machines.Items = cached
return machines, err
}
machines.Items = append(machines.Items, *machine)
}
return machines, nil
}
// Stop implements kraftkit.sh/api/machine/v1alpha1.MachineService.Stop
func (service *machineV1alpha1Service) Stop(ctx context.Context, machine *machinev1alpha1.Machine) (*machinev1alpha1.Machine, error) {
qmpClient, err := service.QMPClient(ctx, machine)
if err != nil {
if strings.HasSuffix(err.Error(), "connect: no such file or directory") {
machine.Status.State = machinev1alpha1.MachineStateExited
machine.Status.ExitedAt = time.Now()
return machine, nil
}
return machine, fmt.Errorf("could not stop qemu instance: %v", err)
}
defer qmpClient.Close()
_, err = qmpClient.Quit(qmpapi.QuitRequest{})
if err != nil {
return machine, err
}
qcfg, ok := machine.Status.PlatformConfig.(QemuConfig)
if !ok {
return machine, fmt.Errorf("cannot read QEMU platform configuration from machine status")
}
machine.Status.State = machinev1alpha1.MachineStateExited
if err := retrytimeout.RetryTimeout(5*time.Second, func() error {
if _, err := os.ReadFile(qcfg.PidFile); !os.IsNotExist(err) {
return fmt.Errorf("process still active")
}
return nil
}); err != nil {
return machine, err
}
return machine, nil
}
// Delete implements kraftkit.sh/api/machine/v1alpha1.MachineService.Delete
func (service *machineV1alpha1Service) Delete(ctx context.Context, machine *machinev1alpha1.Machine) (*machinev1alpha1.Machine, error) {
qcfg, ok := machine.Status.PlatformConfig.(QemuConfig)
if !ok {
return machine, fmt.Errorf("cannot read QEMU platform configuration from machine status")
}
var errs merr.Errors
err := os.RemoveAll(machine.Status.StateDir)
if err != nil {
errs = append(errs, fmt.Errorf("error deleting QEMU's state directory %s: %w", machine.Status.StateDir, err))
}
// Do not throw errors (likely these resources do not exist at this point)
// when trying to remove ephemeral files that are controlled by the QEMU
// process.
_ = os.Remove(qcfg.QMP[0].Resource())
_ = os.Remove(qcfg.QMP[1].Resource())
errs = append(errs, os.RemoveAll(machine.Status.LogFile))
errs = append(errs, os.RemoveAll(machine.Status.StateDir))
return nil, errs.Err()
}