func TestLabelsOnCreate(t *testing.T) {
store := consulStoreWithFakeKV()
podID := types.PodID("pod_id")
az := fields.AvailabilityZone("us-west")
clusterName := fields.ClusterName("cluster_name")
selector := klabels.Everything().
Add(fields.PodIDLabel, klabels.EqualsOperator, []string{podID.String()}).
Add(fields.AvailabilityZoneLabel, klabels.EqualsOperator, []string{az.String()}).
Add(fields.ClusterNameLabel, klabels.EqualsOperator, []string{clusterName.String()})
annotations := fields.Annotations(map[string]interface{}{
"foo": "bar",
})
pc, err := store.Create(podID, az, clusterName, selector, annotations, kptest.NewSession())
if err != nil {
t.Fatalf("Unable to create pod cluster: %s", err)
}
matches, err := store.applicator.GetMatches(selector, labels.PC)
if err != nil {
t.Fatalf("Unable to check for label match on new pod cluster: %s", err)
}
if len(matches) != 1 {
t.Errorf("Expected one pod cluster to match label selector")
}
if fields.ID(matches[0].ID) != pc.ID {
t.Errorf("The pod cluster selector didn't match the new pod cluster")
}
}
func TestLockForSync(t *testing.T) {
id := fields.ID("abc123")
store := consulStoreWithFakeKV()
syncerType := ConcreteSyncerType("some_syncer")
session := kptest.NewSession()
unlocker, err := store.LockForSync(id, syncerType, session)
if err != nil {
t.Fatalf("Unexpected error locking pod cluster for sync: %s", err)
}
_, err = store.LockForSync(id, syncerType, session)
if err == nil {
t.Fatal("Expected an error locking the same cluster for the same syncer type, but there wasn't one")
} else {
if !consulutil.IsAlreadyLocked(err) {
t.Errorf("Expected error to be an already locked error, was %s", err)
}
}
err = unlocker.Unlock()
if err != nil {
t.Errorf("Error unlocking the sync lock: %s", err)
}
_, err = store.LockForSync(id, syncerType, session)
if err != nil {
t.Fatalf("Unexpected error re-locking pod cluster for sync: %s", err)
}
}
func TestWatchPodCluster(t *testing.T) {
store := consulStoreWithFakeKV()
pod := fields.ID("pod_id")
podID := types.PodID("pod_id")
az := fields.AvailabilityZone("us-west")
clusterName := fields.ClusterName("cluster_name")
selector := klabels.Everything().
Add(fields.PodIDLabel, klabels.EqualsOperator, []string{pod.String()}).
Add(fields.AvailabilityZoneLabel, klabels.EqualsOperator, []string{az.String()}).
Add(fields.ClusterNameLabel, klabels.EqualsOperator, []string{clusterName.String()})
annotations := fields.Annotations(map[string]interface{}{
"foo": "bar",
})
session := kptest.NewSession()
pc, err := store.Create(podID, az, clusterName, selector, annotations, session)
if err != nil {
t.Fatalf("Unable to create pod cluster: %s", err)
}
quit := make(chan struct{})
watch := store.WatchPodCluster(pc.ID, quit)
var watched *WatchedPodCluster
select {
case watchedPC := <-watch:
watched = &watchedPC
case <-time.After(5 * time.Second):
quit <- struct{}{}
t.Fatal("nothing on the channel")
}
if watched == nil {
t.Fatalf("Expected to get a watched PodCluster, but did not")
}
if watched.PodCluster.ID != pc.ID {
t.Fatalf("Expected watched PodCluster to match %s Pod Cluster ID. Instead was %s", pc.ID, watched.PodCluster.ID)
}
}
func (s *consulStore) FindWhereLabeled(podID types.PodID,
availabilityZone fields.AvailabilityZone,
clusterName fields.ClusterName) ([]fields.PodCluster, error) {
sel := klabels.Everything().
Add(fields.PodIDLabel, klabels.EqualsOperator, []string{podID.String()}).
Add(fields.AvailabilityZoneLabel, klabels.EqualsOperator, []string{availabilityZone.String()}).
Add(fields.ClusterNameLabel, klabels.EqualsOperator, []string{clusterName.String()})
podClusters, err := s.applicator.GetMatches(sel, labels.PC)
if err != nil {
return nil, err
}
ret := make([]fields.PodCluster, len(podClusters))
for i, pc := range podClusters {
ret[i], err = s.Get(fields.ID(pc.ID))
if err != nil {
return nil, err
}
}
return ret, nil
}
func (p *FakePCStore) Create(
podID types.PodID,
availabilityZone fields.AvailabilityZone,
clusterName fields.ClusterName,
podSelector klabels.Selector,
annotations fields.Annotations,
_ pcstore.Session,
) (fields.PodCluster, error) {
id := fields.ID(uuid.New())
pc := fields.PodCluster{
ID: id,
PodID: podID,
AvailabilityZone: availabilityZone,
Name: clusterName,
PodSelector: podSelector,
Annotations: annotations,
}
p.podClusters[id] = pc
if watcher, ok := p.watchers[id]; ok {
watcher <- pcstore.WatchedPodCluster{PodCluster: &pc, Err: nil}
}
return pc, nil
}
func TestInitialClusters(t *testing.T) {
store := consulStoreWithFakeKV()
syncer := &fakeSyncer{
[]fields.ID{"abc-123"},
make(chan fakeSync),
make(chan fakeSync),
false,
}
clusters, err := store.getInitialClusters(syncer)
if err != nil {
t.Fatalf("Did not expect error to occur getting clusters: %v", err)
}
if len(clusters.Clusters) != 1 {
t.Fatalf("Got unexpected number of clusters (%v)", len(clusters.Clusters))
}
if clusters.Clusters[0].ID != fields.ID("abc-123") {
t.Fatalf("Got unexpected initial cluster %v", clusters.Clusters[0].ID)
}
}
func (s *consulStore) Create(
podID types.PodID,
availabilityZone fields.AvailabilityZone,
clusterName fields.ClusterName,
podSelector klabels.Selector,
annotations fields.Annotations,
session Session,
) (fields.PodCluster, error) {
id := fields.ID(uuid.New())
unlocker, err := s.lockForCreation(podID, availabilityZone, clusterName, session)
if err != nil {
return fields.PodCluster{}, err
}
defer unlocker.Unlock()
existing, err := s.FindWhereLabeled(podID, availabilityZone, clusterName)
if err != nil {
return fields.PodCluster{}, util.Errorf("Couldn't determine if pod cluster exists already: %v", err)
}
if len(existing) > 0 {
return existing[0], PodClusterAlreadyExists
}
pc := fields.PodCluster{
ID: id,
PodID: podID,
AvailabilityZone: availabilityZone,
Name: clusterName,
PodSelector: podSelector,
Annotations: annotations,
}
key, err := pcPath(id)
if err != nil {
return fields.PodCluster{}, err
}
jsonPC, err := json.Marshal(pc)
if err != nil {
// Probably the annotations don't marshal to JSON
return fields.PodCluster{}, util.Errorf("Unable to marshal pod cluster as JSON: %s", err)
}
// the chance of the UUID already existing is vanishingly small, but
// technically not impossible, so we should use the CAS index to guard
// against duplicate UUIDs
success, _, err := s.kv.CAS(&api.KVPair{
Key: key,
Value: jsonPC,
ModifyIndex: 0,
}, nil)
if err != nil {
return fields.PodCluster{}, consulutil.NewKVError("cas", key, err)
}
if !success {
return fields.PodCluster{}, util.Errorf("Could not set pod cluster at path '%s'", key)
}
err = s.setLabelsForPC(pc)
if err != nil {
// TODO: what if this delete fails?
deleteErr := s.Delete(pc.ID)
if deleteErr != nil {
err = util.Errorf("%s\n%s", err, deleteErr)
}
return fields.PodCluster{}, err
}
return pc, nil
}
func TestConcreteSyncerWithPrevious(t *testing.T) {
store := consulStoreWithFakeKV()
store.logger.Logger.Level = logrus.DebugLevel
store.applicator.SetLabel(labels.POD, "1234-123-123-1234", "color", "red")
store.applicator.SetLabel(labels.POD, "abcd-abc-abc-abcd", "color", "blue")
syncer := &fakeSyncer{
[]fields.ID{},
make(chan fakeSync),
make(chan fakeSync),
false,
}
// Previous == current, simulates a concrete syncer starting up
change := podClusterChange{
previous: &fields.PodCluster{
ID: fields.ID("abc123"),
PodID: types.PodID("vvv"),
AvailabilityZone: fields.AvailabilityZone("west"),
Name: "production",
PodSelector: klabels.Everything().Add("color", klabels.EqualsOperator, []string{"red"}),
},
current: &fields.PodCluster{
ID: fields.ID("abc123"),
PodID: types.PodID("vvv"),
AvailabilityZone: fields.AvailabilityZone("west"),
Name: "production",
PodSelector: klabels.Everything().Add("color", klabels.EqualsOperator, []string{"red"}),
},
}
changes := make(chan podClusterChange)
go store.handlePCUpdates(syncer, changes, metrics.NewHistogram(metrics.NewExpDecaySample(1028, 0.015)))
select {
case changes <- change:
case <-time.After(5 * time.Second):
t.Fatal("Test timed out trying to write change to handlePCChange")
}
select {
case <-time.After(5 * time.Second):
t.Fatal("Test timed out trying to read from the syncer")
case sync := <-syncer.synced:
if sync.syncedCluster == nil {
t.Fatal("unexpectedly didn't get a cluster on the sync channel")
}
if sync.syncedCluster.ID != change.current.ID {
t.Fatalf("got unexpected synced cluster %v", sync.syncedCluster.ID)
}
if len(sync.syncedPods) != 1 {
t.Fatalf("got unexpected number of synced pods with cluster: %v", len(sync.syncedPods))
}
if sync.syncedPods[0].ID != "1234-123-123-1234" {
t.Fatalf("got unexpected pod ID from labeled pods sync: %v", sync.syncedPods[0].ID)
}
}
// now we send a new update that changes the pod cluster's target pod from the red one to the blue one.
// (from 1234-123-123-1234 to abcd-abc-abc-abcd )
change = podClusterChange{
previous: change.current,
current: &fields.PodCluster{
ID: fields.ID("abc123"),
PodID: types.PodID("vvv"),
AvailabilityZone: fields.AvailabilityZone("west"),
Name: "production",
PodSelector: klabels.Everything().Add("color", klabels.EqualsOperator, []string{"blue"}),
},
}
select {
case changes <- change:
case <-time.After(5 * time.Second):
t.Fatal("Test timed out trying to write change to handlePCChange")
}
select {
case <-time.After(5 * time.Second):
t.Fatal("Test timed out trying to read from the syncer")
case sync := <-syncer.synced:
if sync.syncedCluster == nil {
t.Fatal("unexpectedly didn't get a cluster on the sync channel")
}
if sync.syncedCluster.ID != change.current.ID {
t.Fatalf("got unexpected synced cluster %v", sync.syncedCluster.ID)
}
if len(sync.syncedPods) != 1 {
t.Fatalf("got unexpected number of synced pods with cluster: %v", len(sync.syncedPods))
}
if sync.syncedPods[0].ID != "abcd-abc-abc-abcd" {
t.Fatalf("got unexpected pod ID from labeled pods sync: %v", sync.syncedPods[0].ID)
}
}
// appear to have deleted the cluster
change.previous = change.current
change.current = nil
select {
case changes <- change:
case <-time.After(5 * time.Second):
t.Fatal("Test timed out trying to write deletion change to handlePCChange")
}
select {
case <-time.After(5 * time.Second):
t.Fatal("Test timed out trying to read from the syncer")
case sync := <-syncer.deleted:
if sync.syncedCluster == nil {
t.Fatal("unexpectedly didn't get a cluster on the sync channel")
}
if sync.syncedCluster.ID != change.previous.ID {
t.Fatalf("got unexpected synced cluster %v", sync.syncedCluster.ID)
}
}
close(changes)
}
func TestZipPodClusterResults(t *testing.T) {
store := consulStore{}
previous := WatchedPodClusters{
[]*fields.PodCluster{
{
ID: fields.ID("abc123"),
PodID: types.PodID("vvv"),
Name: "old name 1",
},
{
ID: fields.ID("def456"),
PodID: types.PodID("xxx"),
Name: "old name 2",
},
},
nil,
}
current := WatchedPodClusters{
[]*fields.PodCluster{
{
ID: fields.ID("abc123"),
PodID: types.PodID("vvv"),
Name: "new name 1",
},
{
ID: fields.ID("987fed"),
PodID: types.PodID("zzz"),
Name: "new name 3",
},
},
nil,
}
zipped := store.zipResults(current, previous)
if len(zipped) != 3 {
t.Errorf("Unexpected number of clusters in zipped results: %v", len(zipped))
}
updated := zipped[fields.ID("abc123")]
if updated.previous == nil || updated.current == nil {
t.Fatalf("Either (%v) or (%v) is nil, but neither should be", updated.previous, updated.current)
}
if updated.current.Name != "new name 1" {
t.Errorf("%v was not the right name for the current cluster", updated.current.Name)
}
if updated.previous.Name != "old name 1" {
t.Errorf("%v was not the right name for the previous cluster", updated.previous.Name)
}
onlyOld := zipped[fields.ID("def456")]
if onlyOld.current != nil {
t.Error("cluster onlyOld should not have had a current cluster")
}
if onlyOld.previous == nil {
t.Fatalf("the previous cluster should not have been nil")
}
if onlyOld.previous.Name != "old name 2" {
t.Errorf("The old name %v was wrong for the cluster", onlyOld.previous.Name)
}
onlyNew := zipped[fields.ID("987fed")]
if onlyNew.previous != nil {
t.Error("cluster onlyNew should not have had a previous cluster")
}
if onlyNew.current == nil {
t.Fatalf("the current cluster should not have been nil")
}
if onlyNew.current.Name != "new name 3" {
t.Errorf("The old name %v was wrong for the cluster", onlyNew.current.Name)
}
}
func main() {
cmd, consulOpts, labeler := flags.ParseWithConsulOptions()
client := kp.NewConsulClient(consulOpts)
kv := kp.NewConsulStore(client)
logger := logging.NewLogger(logrus.Fields{})
pcstore := pcstore.NewConsul(client, labeler, labels.NewConsulApplicator(client, 0), &logger)
session, _, err := kv.NewSession(fmt.Sprintf("pcctl-%s", currentUserName()), nil)
if err != nil {
log.Fatalf("Could not create session: %s", err)
}
switch cmd {
case cmdCreateText:
az := fields.AvailabilityZone(*createAZ)
cn := fields.ClusterName(*createName)
podID := types.PodID(*createPodID)
selector := selectorFrom(az, cn, podID)
pccontrol := control.NewPodCluster(az, cn, podID, pcstore, selector, session)
annotations := *createAnnotations
var parsedAnnotations map[string]interface{}
err := json.Unmarshal([]byte(annotations), &parsedAnnotations)
if err != nil {
log.Fatalf("could not parse json: %v", err)
}
_, err = pccontrol.Create(parsedAnnotations)
if err != nil {
log.Fatalf("err: %v", err)
}
case cmdGetText:
az := fields.AvailabilityZone(*getAZ)
cn := fields.ClusterName(*getName)
podID := types.PodID(*getPodID)
pcID := fields.ID(*getID)
var pccontrol *control.PodCluster
if pcID != "" {
pccontrol = control.NewPodClusterFromID(pcID, session, pcstore)
} else if az != "" && cn != "" && podID != "" {
selector := selectorFrom(az, cn, podID)
pccontrol = control.NewPodCluster(az, cn, podID, pcstore, selector, session)
} else {
log.Fatalf("Expected one of: pcID or (pod,az,name)")
}
pc, err := pccontrol.Get()
if err != nil {
log.Fatalf("Caught error while fetching pod cluster: %v", err)
}
bytes, err := json.Marshal(pc)
if err != nil {
logger.WithError(err).Fatalln("Unable to marshal PC as JSON")
}
fmt.Printf("%s", bytes)
case cmdDeleteText:
az := fields.AvailabilityZone(*deleteAZ)
cn := fields.ClusterName(*deleteName)
podID := types.PodID(*deletePodID)
pcID := fields.ID(*deleteID)
var pccontrol *control.PodCluster
if pcID != "" {
pccontrol = control.NewPodClusterFromID(pcID, session, pcstore)
} else if az != "" && cn != "" && podID != "" {
selector := selectorFrom(az, cn, podID)
pccontrol = control.NewPodCluster(az, cn, podID, pcstore, selector, session)
} else {
log.Fatalf("Expected one of: pcID or (pod,az,name)")
}
errors := pccontrol.Delete()
if len(errors) >= 1 {
for _, err := range errors {
_, _ = os.Stderr.Write([]byte(fmt.Sprintf("Failed to delete one pod cluster matching arguments. Error:\n %s\n", err.Error())))
}
os.Exit(1)
}
case cmdUpdateText:
az := fields.AvailabilityZone(*updateAZ)
cn := fields.ClusterName(*updateName)
podID := types.PodID(*updatePodID)
pcID := fields.ID(*updateID)
var pccontrol *control.PodCluster
if pcID != "" {
pccontrol = control.NewPodClusterFromID(pcID, session, pcstore)
} else if az != "" && cn != "" && podID != "" {
selector := selectorFrom(az, cn, podID)
pccontrol = control.NewPodCluster(az, cn, podID, pcstore, selector, session)
} else {
log.Fatalf("Expected one of: pcID or (pod,az,name)")
}
var annotations fields.Annotations
err := json.Unmarshal([]byte(*updateAnnotations), &annotations)
if err != nil {
_, _ = os.Stderr.Write([]byte(fmt.Sprintf("Annotations are invalid JSON. Err follows:\n%v", err)))
os.Exit(1)
}
pc, err := pccontrol.Update(annotations)
if err != nil {
log.Fatalf("Error during PodCluster update: %v\n%v", err, pc)
os.Exit(1)
}
bytes, err := json.Marshal(pc)
if err != nil {
log.Fatalf("Update succeeded, but error during displaying PC: %v\n%+v", err, pc)
os.Exit(1)
}
fmt.Printf("%s", bytes)
case cmdListText:
pcs, err := pcstore.List()
if err != nil {
_, _ = os.Stderr.Write([]byte(fmt.Sprintf("Could not list pcs. Err follows:\n%v", err)))
os.Exit(1)
}
bytes, err := json.Marshal(pcs)
if err != nil {
_, _ = os.Stderr.Write([]byte(fmt.Sprintf("Could not marshal pc list. Err follows:\n%v", err)))
os.Exit(1)
}
fmt.Printf("%s", bytes)
default:
log.Fatalf("Unrecognized command %v", cmd)
}
}