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lab.go
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lab.go
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// Copyright (c) 2018-2019 Aalborg University
// Use of this source code is governed by a GPLv3
// license that can be found in the LICENSE file.
package lab
import (
"context"
"fmt"
"math/rand"
"sync"
"time"
"github.com/aau-network-security/haaukins/exercise"
"github.com/aau-network-security/haaukins/store"
"github.com/aau-network-security/haaukins/virtual"
"github.com/aau-network-security/haaukins/virtual/docker"
"github.com/aau-network-security/haaukins/virtual/vbox"
"github.com/docker/docker/pkg/namesgenerator"
"github.com/rs/zerolog/log"
)
var (
newEnvironment = exercise.NewEnvironment
)
type Config struct {
Frontends []store.InstanceConfig
Exercises []store.Exercise
DisabledExercises []store.Tag
}
func (conf Config) Flags() []store.ChildrenChalConfig {
var res []store.ChildrenChalConfig
for _, exercise := range conf.Exercises {
res = append(res, exercise.Flags()...)
}
return res
}
// GetChildrenChallenges returns list of children challenge tags to be used in amigo frontend
func (conf Config) GetChildrenChallenges(parentTag string) []string {
var childrenTags []string
var flags []store.ChildrenChalConfig
for _, i := range conf.Exercises {
if i.Tag == store.Tag(parentTag) {
for _, m := range i.Instance {
flags = append(flags, m.Flags...)
}
}
}
for _, f := range flags {
childrenTags = append(childrenTags, string(f.Tag))
}
return childrenTags
}
type Creator interface {
NewLab(context.Context, int32) (Lab, error)
UpdateExercises([]store.Exercise)
}
type LabHost struct {
Vlib vbox.Library
Conf Config
}
func (lh *LabHost) UpdateExercises(newExercises []store.Exercise) {
newExercises = append(newExercises, lh.Conf.Exercises...)
lh.Conf.Exercises = newExercises
}
func (lh *LabHost) NewLab(ctx context.Context, isVPN int32) (Lab, error) {
env := newEnvironment(lh.Vlib)
if err := env.Create(ctx, isVPN); err != nil {
return nil, fmt.Errorf("new environment create err %v ", err)
}
if err := env.Add(ctx, lh.Conf.Exercises...); err != nil {
return nil, fmt.Errorf("new environment add err %v ", err)
}
// setting disabled exercise tags
// will not be run when event is created
// instead will be created
// manual start is required
env.SetDisabledExercises(lh.Conf.DisabledExercises)
dockerHost := docker.NewHost()
l := &lab{
tag: generateTag(),
lib: lh.Vlib,
environment: env,
dockerHost: dockerHost,
frontends: map[uint]frontendConf{},
}
for _, f := range lh.Conf.Frontends {
port := virtual.GetAvailablePort()
if _, err := l.addFrontend(ctx, f, port); err != nil {
return nil, err
}
}
return l, nil
}
type Lab interface {
Start(context.Context) error
Stop() error
Restart(context.Context) error
Suspend(context.Context) error
Resume(context.Context) error
Environment() exercise.Environment
ResetFrontends(ctx context.Context, eventTag, teamId string) error
RdpConnPorts() []uint
Tag() string
AddChallenge(ctx context.Context, confs ...store.Exercise) error
InstanceInfo() []virtual.InstanceInfo
Close() error
}
type lab struct {
tag string
lib vbox.Library
environment exercise.Environment
frontends map[uint]frontendConf
dockerHost docker.Host
}
type frontendConf struct {
vm vbox.VM
conf store.InstanceConfig
}
func (l *lab) addFrontend(ctx context.Context, conf store.InstanceConfig, rdpPort uint) (vbox.VM, error) {
hostIp, err := l.dockerHost.GetDockerHostIP()
if err != nil {
return nil, err
}
vm, err := l.lib.GetCopy(
ctx,
conf,
vbox.SetBridge(l.environment.NetworkInterface()),
vbox.SetLocalRDP(hostIp, rdpPort),
vbox.SetRAM(conf.MemoryMB),
)
if err != nil {
return nil, err
}
l.frontends[rdpPort] = frontendConf{
vm: vm,
conf: conf,
}
log.Debug().Msgf("Created lab frontend on port %d", rdpPort)
return vm, nil
}
func (l *lab) AddChallenge(ctx context.Context, confs ...store.Exercise) error {
var waitGroup sync.WaitGroup
var startByTagError error
if err := l.environment.Add(ctx, confs...); err != nil {
return err
}
for _, ch := range confs {
if ch.Static {
// in case of no docker or vm given to start
// skip it
continue
}
waitGroup.Add(1)
go func() {
defer waitGroup.Done()
if err := l.environment.StartByTag(ctx, string(ch.Tag)); err != nil {
startByTagError = err
}
}()
waitGroup.Wait()
}
return startByTagError
}
func (l *lab) Environment() exercise.Environment {
return l.environment
}
func (l *lab) ResetFrontends(ctx context.Context, eventTag, teamId string) error {
var errs []error
for p, vmConf := range l.frontends {
err := vmConf.vm.Close()
if err != nil {
errs = append(errs, err)
continue
}
vm, err := l.addFrontend(ctx, vmConf.conf, p)
if err != nil {
errs = append(errs, err)
continue
}
err = vm.Start(ctx)
if err != nil {
errs = append(errs, err)
continue
}
err = vbox.CreateFolderLink(vm.Info().Id, eventTag, teamId)
if err != nil {
log.Logger.Debug().Msgf("Error creating shared folder link after vm reset: %s", err)
}
}
if len(errs) > 0 {
return errs[0]
}
return nil
}
func (l *lab) Start(ctx context.Context) error {
if err := l.environment.Start(ctx); err != nil {
return err
}
for _, fconf := range l.frontends {
if err := fconf.vm.Start(ctx); err != nil {
return err
}
}
return nil
}
func (l *lab) Stop() error {
if err := l.environment.Stop(); err != nil {
return err
}
for _, fconf := range l.frontends {
if err := fconf.vm.Stop(); err != nil {
return err
}
}
return nil
}
func (l *lab) Restart(ctx context.Context) error {
if err := l.environment.Reset(ctx); err != nil {
return err
}
for _, fconf := range l.frontends {
switch fconf.vm.Info().State {
case virtual.Running:
if err := fconf.vm.Stop(); err != nil {
return err
}
if err := fconf.vm.Start(ctx); err != nil {
return err
}
case virtual.Stopped:
if err := fconf.vm.Start(ctx); err != nil {
return err
}
case virtual.Suspended:
if err := fconf.vm.Start(ctx); err != nil {
return err
}
if err := fconf.vm.Stop(); err != nil {
return err
}
if err := fconf.vm.Start(ctx); err != nil {
return err
}
case virtual.Error:
if err := fconf.vm.Create(ctx); err != nil {
return err
}
if err := fconf.vm.Start(ctx); err != nil {
return err
}
}
}
return nil
}
func (l *lab) Close() error {
var wg sync.WaitGroup
for _, lab := range l.frontends {
wg.Add(1)
go func(vm vbox.VM) {
// closing VMs....
defer wg.Done()
if err := vm.Close(); err != nil {
log.Error().Msgf("Error on Close function in lab.go %s", err)
}
}(lab.vm)
}
wg.Add(1)
go func(environment exercise.Environment) {
// closing environment containers...
defer wg.Done()
if err := environment.Close(); err != nil {
log.Error().Msgf("Error while closing environment containers %s", err)
}
}(l.environment)
wg.Wait()
return nil
}
func (l *lab) RdpConnPorts() []uint {
var ports []uint
for p, _ := range l.frontends {
ports = append(ports, p)
}
return ports
}
func (l *lab) Tag() string {
return l.tag
}
func (l *lab) InstanceInfo() []virtual.InstanceInfo {
var instances []virtual.InstanceInfo
for _, fconf := range l.frontends {
instances = append(instances, fconf.vm.Info())
}
instances = append(instances, l.environment.InstanceInfo()...)
return instances
}
func generateTag() string {
// seed for our GetRandomName
rand.Seed(time.Now().UnixNano())
return namesgenerator.GetRandomName(0)
}
func (l *lab) Suspend(ctx context.Context) error {
if err := l.environment.Suspend(ctx); err != nil {
return err
}
for _, fconf := range l.frontends {
if fconf.vm.Info().State == virtual.Running {
if err := fconf.vm.Suspend(ctx); err != nil {
return err
}
}
}
return nil
}
func (l *lab) Resume(ctx context.Context) error {
if err := l.environment.Resume(ctx); err != nil {
return err
}
for _, fconf := range l.frontends {
state := fconf.vm.Info().State
if state == virtual.Suspended {
if err := fconf.vm.Start(ctx); err != nil {
return err
}
}
}
return nil
}