func getPodDefaultIP(workDir string) (string, error) {
// get pod lock
l, err := lock.NewLock(workDir, lock.Dir)
if err != nil {
return "", err
}
// get file descriptor for lock
fd, err := l.Fd()
if err != nil {
return "", err
}
// use this descriptor as method of reading pod network configuration
nets, err := netinfo.LoadAt(fd)
if err != nil {
return "", err
}
// kvm flavored container must have at first position default vm<->host network
if len(nets) == 0 {
return "", fmt.Errorf("pod has no configured networks")
}
for _, net := range nets {
if net.NetName == "default" || net.NetName == "default-restricted" {
return net.IP.String(), nil
}
}
return "", fmt.Errorf("pod has no default network!")
}
/*
* NewNetPreserveNetNameTest checks if netName is set if network is configured via flannel
*/
func NewNetPreserveNetNameTest() testutils.Test {
return testutils.TestFunc(func(t *testing.T) {
ctx := testutils.NewRktRunCtx()
defer ctx.Cleanup()
netdir, ntFlannel, err := mockFlannelNetwork(t, ctx)
if err != nil {
t.Errorf("Can't mock flannel network: %v", err)
}
defer os.RemoveAll(netdir)
defer os.Remove(ntFlannel.SubnetFile)
podUUIDFile := filepath.Join(ctx.DataDir(), "pod_uuid")
defer os.Remove(podUUIDFile)
// start container with 'flannel' network
testImageArgs := []string{"--exec=/inspect"}
testImage := patchTestACI("rkt-inspect-networking.aci", testImageArgs...)
defer os.Remove(testImage)
cmd := fmt.Sprintf("%s --debug --insecure-options=image run --uuid-file-save=%s --net=%s --mds-register=false %s", ctx.Cmd(), podUUIDFile, ntFlannel.Name, testImage)
spawnAndWaitOrFail(t, cmd, 0)
podUUID, err := ioutil.ReadFile(podUUIDFile)
if err != nil {
t.Fatalf("Can't read pod UUID: %v", err)
}
// read net-info.json created for pod
podDir := filepath.Join(ctx.DataDir(), "pods", "run", string(podUUID))
podDirfd, err := syscall.Open(podDir, syscall.O_RDONLY|syscall.O_DIRECTORY, 0)
if err != nil {
t.Fatalf("Can't open pod directory for reading! %v", err)
}
info, err := netinfo.LoadAt(podDirfd)
if err != nil {
t.Fatalf("Can't open net-info.json for reading: %v", err)
}
if len(info) != 2 {
t.Fatalf("Incorrect number of networks: %v", len(info))
}
found := false
for _, net := range info {
if net.NetName == ntFlannel.Name {
found = true
break
}
}
if !found {
t.Fatalf("Network '%s' not found!\nnetInfo[0]: %v\nnetInfo[1]: %v", ntFlannel.Name, info[0], info[1])
}
})
}
// Load creates the Networking object from saved state.
// Assumes the current netns is that of the host.
func Load(podRoot string, podID *types.UUID) (*Networking, error) {
// the current directory is pod root
pdirfd, err := syscall.Open(podRoot, syscall.O_RDONLY|syscall.O_DIRECTORY, 0)
if err != nil {
return nil, errwrap.Wrap(fmt.Errorf("failed to open pod root directory (%v)", podRoot), err)
}
defer syscall.Close(pdirfd)
nis, err := netinfo.LoadAt(pdirfd)
if err != nil {
return nil, err
}
var nets []activeNet
for _, ni := range nis {
n, err := loadNet(ni.ConfPath)
if err != nil {
if !os.IsNotExist(err) {
stderr.PrintE(fmt.Sprintf("error loading %q; ignoring", ni.ConfPath), err)
}
continue
}
// make a copy of ni to make it a unique object as it's saved via ptr
rti := ni
n.runtime = &rti
nets = append(nets, *n)
}
p := podEnv{
podRoot: podRoot,
podID: *podID,
}
podNS, err := p.podNSLoad()
if err != nil {
return nil, err
}
p.podNS = podNS
return &Networking{
podEnv: p,
nets: nets,
}, nil
}
// Load creates the Networking object from saved state.
// Assumes the current netns is that of the host.
func Load(podRoot string, podID *types.UUID) (*Networking, error) {
// the current directory is pod root
pdirfd, err := syscall.Open(podRoot, syscall.O_RDONLY|syscall.O_DIRECTORY, 0)
if err != nil {
return nil, fmt.Errorf("Failed to open pod root directory (%v): %v", podRoot, err)
}
defer syscall.Close(pdirfd)
nis, err := netinfo.LoadAt(pdirfd)
if err != nil {
return nil, err
}
hostNS, err := os.Open(selfNetNS)
if err != nil {
return nil, err
}
nets := []activeNet{}
for _, ni := range nis {
n, err := loadNet(ni.ConfPath)
if err != nil {
if !os.IsNotExist(err) {
log.Printf("Error loading %q: %v; ignoring", ni.ConfPath, err)
}
continue
}
// make a copy of ni to make it a unique object as it's saved via ptr
rti := ni
nets = append(nets, activeNet{
conf: n.conf,
runtime: &rti,
})
}
return &Networking{
podEnv: podEnv{
podRoot: podRoot,
podID: *podID,
},
hostNS: hostNS,
nets: nets,
}, nil
}
// getPod returns a pod struct representing the given pod.
// The returned lock is always left in an open but unlocked state.
// The pod must be closed using pod.Close()
func getPod(uuid *types.UUID) (*pod, error) {
if err := initPods(); err != nil {
return nil, err
}
p := &pod{uuid: uuid}
// we try open the pod in all possible directories, in the same order the states occur
l, err := lock.NewLock(p.embryoPath(), lock.Dir)
if err == nil {
p.isEmbryo = true
} else if err == lock.ErrNotExist {
l, err = lock.NewLock(p.preparePath(), lock.Dir)
if err == nil {
// treat as aborted prepare until lock is tested
p.isAbortedPrepare = true
} else if err == lock.ErrNotExist {
l, err = lock.NewLock(p.preparedPath(), lock.Dir)
if err == nil {
p.isPrepared = true
} else if err == lock.ErrNotExist {
l, err = lock.NewLock(p.runPath(), lock.Dir)
if err == nil {
// treat as exited until lock is tested
p.isExited = true
} else if err == lock.ErrNotExist {
l, err = lock.NewLock(p.exitedGarbagePath(), lock.Dir)
if err == lock.ErrNotExist {
l, err = lock.NewLock(p.garbagePath(), lock.Dir)
if err == nil {
p.isGarbage = true
} else {
return nil, fmt.Errorf("pod %q not found", uuid)
}
} else if err == nil {
p.isExitedGarbage = true
p.isExited = true // ExitedGarbage is _always_ implicitly exited
}
}
}
}
}
if err != nil && err != lock.ErrNotExist {
return nil, errwrap.Wrap(fmt.Errorf("error opening pod %q", uuid), err)
}
if !p.isPrepared && !p.isEmbryo {
// preparing, run, exitedGarbage, and garbage dirs use exclusive locks to indicate preparing/aborted, running/exited, and deleting/marked
if err = l.TrySharedLock(); err != nil {
if err != lock.ErrLocked {
l.Close()
return nil, errwrap.Wrap(errors.New("unexpected lock error"), err)
}
if p.isExitedGarbage {
// locked exitedGarbage is also being deleted
p.isExitedDeleting = true
} else if p.isExited {
// locked exited and !exitedGarbage is not exited (default in the run dir)
p.isExited = false
} else if p.isAbortedPrepare {
// locked in preparing is preparing, not aborted (default in the preparing dir)
p.isAbortedPrepare = false
p.isPreparing = true
} else if p.isGarbage {
// locked in non-exited garbage is deleting
p.isDeleting = true
}
err = nil
} else {
l.Unlock()
}
}
p.FileLock = l
if p.isRunning() {
cfd, err := p.Fd()
if err != nil {
return nil, errwrap.Wrap(fmt.Errorf("error acquiring pod %v dir fd", uuid), err)
}
p.nets, err = netinfo.LoadAt(cfd)
// ENOENT is ok -- assume running with --net=host
if err != nil && !os.IsNotExist(err) {
return nil, errwrap.Wrap(fmt.Errorf("error opening pod %v netinfo", uuid), err)
}
}
return p, nil
}
// getPod returns a pod struct representing the given pod.
// The returned lock is always left in an open but unlocked state.
// The pod must be closed using pod.Close()
func getPod(dataDir string, uuid *types.UUID) (*Pod, error) {
if err := initPods(dataDir); err != nil {
return nil, err
}
p := &Pod{UUID: uuid, dataDir: dataDir}
// dirStates is a list of directories -> state that directory existing
// implies.
// Its order matches the order states occur.
dirStates := []struct {
dir string
impliedStates []*bool
}{
{dir: p.embryoPath(), impliedStates: []*bool{&p.isEmbryo}},
// For prepare, assume it's aborted prepare until it gets updated below
{dir: p.preparePath(), impliedStates: []*bool{&p.isAbortedPrepare}},
{dir: p.preparedPath(), impliedStates: []*bool{&p.isPrepared}},
// For run, assume exited until the lock is tested
{dir: p.runPath(), impliedStates: []*bool{&p.isExited}},
// Exited garbage implies exited
{dir: p.exitedGarbagePath(), impliedStates: []*bool{&p.isExitedGarbage, &p.isExited}},
{dir: p.garbagePath(), impliedStates: []*bool{&p.isGarbage}},
}
var l *lock.FileLock
var err error
for _, dirState := range dirStates {
l, err = lock.NewLock(dirState.dir, lock.Dir)
if err == nil {
for _, s := range dirState.impliedStates {
*s = true
}
break
}
if err == lock.ErrNotExist {
continue
}
// unexpected lock error
return nil, errwrap.Wrap(fmt.Errorf("error opening pod %q", uuid), err)
}
if !p.isPrepared && !p.isEmbryo {
// preparing, run, exitedGarbage, and garbage dirs use exclusive locks to indicate preparing/aborted, running/exited, and deleting/marked
if err = l.TrySharedLock(); err != nil {
if err != lock.ErrLocked {
l.Close()
return nil, errwrap.Wrap(errors.New("unexpected lock error"), err)
}
if p.isExitedGarbage {
// locked exitedGarbage is also being deleted
p.isExitedDeleting = true
} else if p.isExited {
// locked exited and !exitedGarbage is not exited (default in the run dir)
p.isExited = false
} else if p.isAbortedPrepare {
// locked in preparing is preparing, not aborted (default in the preparing dir)
p.isAbortedPrepare = false
p.isPreparing = true
} else if p.isGarbage {
// locked in non-exited garbage is deleting
p.isDeleting = true
}
err = nil
} else {
l.Unlock()
}
}
p.FileLock = l
if p.isRunning() {
cfd, err := p.Fd()
if err != nil {
return nil, errwrap.Wrap(fmt.Errorf("error acquiring pod %v dir fd", uuid), err)
}
p.Nets, err = netinfo.LoadAt(cfd)
// ENOENT is ok -- assume running with --net=host
if err != nil && !os.IsNotExist(err) {
return nil, errwrap.Wrap(fmt.Errorf("error opening pod %v netinfo", uuid), err)
}
}
return p, nil
}
