// handleMaster performs one loop of master locking.
// on success it returns <master>, nil
// on error it returns "", err
// in situations where you should try again due to concurrent state changes (e.g. another actor simultaneously acquiring the lock)
// it returns "", nil
func (e *etcdMasterElector) handleMaster(path, id string, ttl uint64) (string, error) {
res, err := e.etcd.Get(path, false, false)
// Unexpected error, bail out
if err != nil && !etcdstorage.IsEtcdNotFound(err) {
return "", err
}
// There is no master, try to become the master.
if err != nil && etcdstorage.IsEtcdNotFound(err) {
return e.becomeMaster(path, id, ttl)
}
// This should never happen.
if res.Node == nil {
return "", fmt.Errorf("unexpected response: %#v", res)
}
// We're not the master, just return the current value
if res.Node.Value != id {
return res.Node.Value, nil
}
// We are the master, try to extend out lease
return e.extendMaster(path, id, ttl, res)
}
func testInstallThirdPartyAPIDeleteVersion(t *testing.T, version string) {
_, etcdserver, server, assert := initThirdParty(t, version)
defer server.Close()
defer etcdserver.Terminate(t)
client := etcdserver.Client
expectedObj := Foo{
ObjectMeta: api.ObjectMeta{
Name: "test",
Namespace: "default",
},
TypeMeta: unversioned.TypeMeta{
Kind: "Foo",
},
SomeField: "test field",
OtherField: 10,
}
if !assert.NoError(storeToEtcd(client, "/ThirdPartyResourceData/company.com/foos/default/test", "test", expectedObj)) {
t.FailNow()
return
}
resp, err := http.Get(server.URL + "/apis/company.com/" + version + "/namespaces/default/foos/test")
if !assert.NoError(err) {
return
}
assert.Equal(http.StatusOK, resp.StatusCode)
item := Foo{}
assert.NoError(decodeResponse(resp, &item))
// Fill in fields set by the apiserver
expectedObj.SelfLink = item.SelfLink
expectedObj.ResourceVersion = item.ResourceVersion
expectedObj.Namespace = item.Namespace
if !assert.True(reflect.DeepEqual(item, expectedObj)) {
t.Errorf("expected:\n%v\nsaw:\n%v\n", expectedObj, item)
}
resp, err = httpDelete(server.URL + "/apis/company.com/" + version + "/namespaces/default/foos/test")
if !assert.NoError(err) {
return
}
assert.Equal(http.StatusOK, resp.StatusCode)
resp, err = http.Get(server.URL + "/apis/company.com/" + version + "/namespaces/default/foos/test")
if !assert.NoError(err) {
return
}
assert.Equal(http.StatusNotFound, resp.StatusCode)
expectedDeletedKey := etcdtest.AddPrefix("ThirdPartyResourceData/company.com/foos/default/test")
_, err = client.Get(expectedDeletedKey, false, false)
if !etcdstorage.IsEtcdNotFound(err) {
t.Errorf("expected deletion didn't happen: %v", err)
}
}
// acquireOrRenewLease either races to acquire a new master lease, or update the existing master's lease
// returns true if we have the lease, and an error if one occurs.
// TODO: use the master election utility once it is merged in.
func (c *config) acquireOrRenewLease(etcdClient *etcd.Client) (bool, error) {
result, err := etcdClient.Get(c.key, false, false)
if err != nil {
if etcdstorage.IsEtcdNotFound(err) {
// there is no current master, try to become master, create will fail if the key already exists
_, err := etcdClient.Create(c.key, c.whoami, c.ttl)
if err != nil {
return false, err
}
c.lastLease = time.Now()
return true, nil
}
return false, err
}
if result.Node.Value == c.whoami {
glog.Infof("key already exists, we are the master (%s)", result.Node.Value)
// we extend our lease @ 1/2 of the existing TTL, this ensures the master doesn't flap around
if result.Node.Expiration.Sub(time.Now()) < time.Duration(c.ttl/2)*time.Second {
_, err := etcdClient.CompareAndSwap(c.key, c.whoami, c.ttl, c.whoami, result.Node.ModifiedIndex)
if err != nil {
return false, err
}
}
c.lastLease = time.Now()
return true, nil
}
glog.Infof("key already exists, the master is %s, sleeping.", result.Node.Value)
return false, nil
}
// GetAndTestEtcdClient creates an etcd client based on the provided config. It will attempt to
// connect to the etcd server and block until the server responds at least once, or return an
// error if the server never responded.
func GetAndTestEtcdClient(etcdClientInfo configapi.EtcdConnectionInfo) (*etcdclient.Client, error) {
// etcd does a poor job of setting up the transport - use the Kube client stack
transport, err := client.TransportFor(&client.Config{
TLSClientConfig: client.TLSClientConfig{
CertFile: etcdClientInfo.ClientCert.CertFile,
KeyFile: etcdClientInfo.ClientCert.KeyFile,
CAFile: etcdClientInfo.CA,
},
WrapTransport: DefaultEtcdClientTransport,
})
if err != nil {
return nil, err
}
etcdClient := etcdclient.NewClient(etcdClientInfo.URLs)
etcdClient.SetTransport(transport.(*http.Transport))
for i := 0; ; i++ {
_, err := etcdClient.Get("/", false, false)
if err == nil || etcdstorage.IsEtcdNotFound(err) {
break
}
if i > 100 {
return nil, fmt.Errorf("could not reach etcd: %v", err)
}
time.Sleep(50 * time.Millisecond)
}
return etcdClient, nil
}
// InterpretDeleteError converts a generic etcd error on a delete
// operation into the appropriate API error.
func InterpretDeleteError(err error, kind, name string) error {
switch {
case etcdstorage.IsEtcdNotFound(err):
return errors.NewNotFound(kind, name)
default:
return err
}
}
// InterpretDeleteError converts a generic etcd error on a delete
// operation into the appropriate API error.
func InterpretDeleteError(err error, kind, name string) error {
switch {
case etcdstorage.IsEtcdNotFound(err):
return errors.NewNotFound(kind, name)
case etcdstorage.IsEtcdUnreachable(err):
return errors.NewServerTimeout(kind, "delete", 2) // TODO: make configurable or handled at a higher level
default:
return err
}
}
func (s *SchedulerServer) fetchFrameworkID(client tools.EtcdClient) (*mesos.FrameworkID, error) {
if s.FailoverTimeout > 0 {
if response, err := client.Get(meta.FrameworkIDKey, false, false); err != nil {
if !etcdstorage.IsEtcdNotFound(err) {
return nil, fmt.Errorf("unexpected failure attempting to load framework ID from etcd: %v", err)
}
log.V(1).Infof("did not find framework ID in etcd")
} else if response.Node.Value != "" {
log.Infof("configuring FrameworkInfo with Id found in etcd: '%s'", response.Node.Value)
return mutil.NewFrameworkID(response.Node.Value), nil
}
} else {
//TODO(jdef) this seems like a totally hackish way to clean up the framework ID
if _, err := client.Delete(meta.FrameworkIDKey, true); err != nil {
if !etcdstorage.IsEtcdNotFound(err) {
return nil, fmt.Errorf("failed to delete framework ID from etcd: %v", err)
}
log.V(1).Infof("nothing to delete: did not find framework ID in etcd")
}
}
return nil, nil
}
// TestEtcdClient verifies a client is functional. It will attempt to
// connect to the etcd server and block until the server responds at least once, or return an
// error if the server never responded.
func TestEtcdClient(etcdClient *etcdclient.Client) error {
for i := 0; ; i++ {
_, err := etcdClient.Get("/", false, false)
if err == nil || etcdstorage.IsEtcdNotFound(err) {
break
}
if i > 100 {
return fmt.Errorf("could not reach etcd: %v", err)
}
time.Sleep(50 * time.Millisecond)
}
return nil
}
// Release tries to delete the leader lock.
func (e *Etcd) Release() {
for i := 0; i < e.maxRetries; i++ {
_, err := e.client.CompareAndDelete(e.key, e.value, 0)
if err == nil {
break
}
// If the value has changed, we don't hold the lease. If the key is missing we don't
// hold the lease.
if storage.IsEtcdTestFailed(err) || storage.IsEtcdNotFound(err) {
break
}
util.HandleError(fmt.Errorf("unable to release %s: %v", e.key, err))
}
}
// Refresh reloads the RangeAllocation from etcd.
func (e *Etcd) Refresh() (*api.RangeAllocation, error) {
e.lock.Lock()
defer e.lock.Unlock()
existing := &api.RangeAllocation{}
if err := e.storage.Get(e.baseKey, existing, false); err != nil {
if etcdstorage.IsEtcdNotFound(err) {
return nil, nil
}
return nil, etcderr.InterpretGetError(err, e.kind, "")
}
return existing, nil
}
// acquireOrRenewLease either races to acquire a new master lease, or update the existing master's lease
// returns true if we have the lease, and an error if one occurs.
// TODO: use the master election utility once it is merged in.
func (c *config) acquireOrRenewLease(etcdClient *etcd.Client) (bool, error) {
keysAPI := etcd.NewKeysAPI(*etcdClient)
resp, err := keysAPI.Get(context.TODO(), c.key, nil)
if err != nil {
if etcdstorage.IsEtcdNotFound(err) {
// there is no current master, try to become master, create will fail if the key already exists
opts := etcd.SetOptions{
TTL: time.Duration(c.ttl) * time.Second,
PrevExist: "",
}
_, err := keysAPI.Set(context.TODO(), c.key, c.whoami, &opts)
if err != nil {
return false, err
}
c.lastLease = time.Now()
return true, nil
}
return false, err
}
if resp.Node.Value == c.whoami {
glog.Infof("key already exists, we are the master (%s)", resp.Node.Value)
// we extend our lease @ 1/2 of the existing TTL, this ensures the master doesn't flap around
if resp.Node.Expiration.Sub(time.Now()) < time.Duration(c.ttl/2)*time.Second {
opts := etcd.SetOptions{
TTL: time.Duration(c.ttl) * time.Second,
PrevValue: c.whoami,
PrevIndex: resp.Node.ModifiedIndex,
}
_, err := keysAPI.Set(context.TODO(), c.key, c.whoami, &opts)
if err != nil {
return false, err
}
}
c.lastLease = time.Now()
return true, nil
}
glog.Infof("key already exists, the master is %s, sleeping.", resp.Node.Value)
return false, nil
}
func (cfg *Config) Client(check bool) (*etcd.Client, error) {
cfg.bindEnv()
client, err := etcdClient(cfg)
if err != nil {
return nil, err
}
if check {
for i := 0; ; i += 1 {
_, err := client.Get("/", false, false)
if err == nil || etcdstorage.IsEtcdNotFound(err) {
break
}
if i > 100 {
return nil, fmt.Errorf("Could not reach etcd at %q: %v", cfg.EtcdAddr.URL, err)
}
time.Sleep(50 * time.Millisecond)
}
}
return client, nil
}
// tryHold attempts to hold on to the lease by repeatedly refreshing its TTL.
// If the lease hold fails, is deleted, or changed to another user. The provided
// index is used to watch from.
// TODO: currently if we miss the watch window, we will error and try to recreate
// the lock. It's likely we will lose the lease due to that.
func (e *Etcd) tryHold(ttl, index uint64) error {
// watch for termination
stop := make(chan struct{})
lost := make(chan struct{})
watchIndex := index
go util.Until(func() {
index, err := e.waitForExpiration(true, watchIndex, stop)
watchIndex = index
if err != nil {
util.HandleError(fmt.Errorf("error watching for lease expiration %s: %v", e.key, err))
return
}
glog.V(4).Infof("Lease %s lost due to deletion", e.key)
close(lost)
}, 100*time.Millisecond, stop)
defer close(stop)
duration := time.Duration(ttl) * time.Second
after := time.Duration(float32(duration) * e.waitFraction)
last := duration - after
interval := last / time.Duration(e.maxRetries)
if interval < e.minimumRetryInterval {
interval = e.minimumRetryInterval
}
// as long as we can renew the lease, loop
for {
select {
case <-time.After(after):
err := wait.Poll(interval, last, func() (bool, error) {
glog.V(4).Infof("Renewing lease %s", e.key)
resp, err := e.client.CompareAndSwap(e.key, e.value, e.ttl, e.value, index-1)
switch {
case err == nil:
index = eventIndexFor(resp)
return true, nil
case storage.IsEtcdTestFailed(err):
return false, fmt.Errorf("another client has taken the lease %s: %v", e.key, err)
case storage.IsEtcdNotFound(err):
return false, fmt.Errorf("another client has revoked the lease %s", e.key)
default:
util.HandleError(fmt.Errorf("unexpected error renewing lease %s: %v", e.key, err))
index = etcdIndexFor(err, index)
// try again
return false, nil
}
})
switch err {
case nil:
// wait again
glog.V(4).Infof("Lease %s renewed", e.key)
case wait.ErrWaitTimeout:
return fmt.Errorf("unable to renew lease %s: %v", e.key, err)
default:
return fmt.Errorf("lost lease %s: %v", e.key, err)
}
case <-lost:
return fmt.Errorf("the lease has been lost %s", e.key)
}
}
}
func testInstallThirdPartyResourceRemove(t *testing.T, version string) {
master, etcdserver, server, assert := initThirdParty(t, version)
defer server.Close()
defer etcdserver.Terminate(t)
expectedObj := Foo{
ObjectMeta: api.ObjectMeta{
Name: "test",
},
TypeMeta: unversioned.TypeMeta{
Kind: "Foo",
},
SomeField: "test field",
OtherField: 10,
}
if !assert.NoError(storeThirdPartyObject(master.thirdPartyStorage, "/ThirdPartyResourceData/company.com/foos/default/test", "test", expectedObj)) {
t.FailNow()
return
}
secondObj := expectedObj
secondObj.Name = "bar"
if !assert.NoError(storeThirdPartyObject(master.thirdPartyStorage, "/ThirdPartyResourceData/company.com/foos/default/bar", "bar", secondObj)) {
t.FailNow()
return
}
resp, err := http.Get(server.URL + "/apis/company.com/" + version + "/namespaces/default/foos/test")
if !assert.NoError(err) {
t.FailNow()
return
}
if resp.StatusCode != http.StatusOK {
t.Errorf("unexpected status: %v", resp)
}
item := Foo{}
if err := decodeResponse(resp, &item); err != nil {
t.Errorf("unexpected error: %v", err)
}
// TODO: validate etcd set things here
item.ObjectMeta = expectedObj.ObjectMeta
if !assert.True(reflect.DeepEqual(item, expectedObj)) {
t.Errorf("expected:\n%v\nsaw:\n%v\n", expectedObj, item)
}
path := makeThirdPartyPath("company.com")
master.RemoveThirdPartyResource(path)
resp, err = http.Get(server.URL + "/apis/company.com/" + version + "/namespaces/default/foos/test")
if !assert.NoError(err) {
return
}
if resp.StatusCode != http.StatusNotFound {
t.Errorf("unexpected status: %v", resp)
}
expectedDeletedKeys := []string{
etcdtest.AddPrefix("/ThirdPartyResourceData/company.com/foos/default/test"),
etcdtest.AddPrefix("/ThirdPartyResourceData/company.com/foos/default/bar"),
}
for _, key := range expectedDeletedKeys {
thirdPartyObj := extensions.ThirdPartyResourceData{}
err := master.thirdPartyStorage.Get(context.TODO(), key, &thirdPartyObj, false)
if !etcdstorage.IsEtcdNotFound(err) {
t.Errorf("expected deletion didn't happen: %v", err)
}
}
installed := master.ListThirdPartyResources()
if len(installed) != 0 {
t.Errorf("Resource(s) still installed: %v", installed)
}
services := master.handlerContainer.RegisteredWebServices()
for ix := range services {
if strings.HasPrefix(services[ix].RootPath(), "/apis/company.com") {
t.Errorf("Web service still installed at %s: %#v", services[ix].RootPath(), services[ix])
}
}
}
func TestUserInitialization(t *testing.T) {
masterConfig, clusterAdminKubeConfig, err := testutil.StartTestMaster()
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
clusterAdminClient, err := testutil.GetClusterAdminClient(clusterAdminKubeConfig)
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
etcdClient, err := etcd.GetAndTestEtcdClient(masterConfig.EtcdClientInfo)
if err != nil {
t.Errorf("unexpected error: %v", err)
}
etcdHelper, err := origin.NewEtcdStorage(etcdClient, masterConfig.EtcdStorageConfig.OpenShiftStorageVersion, masterConfig.EtcdStorageConfig.OpenShiftStoragePrefix)
if err != nil {
t.Errorf("unexpected error: %v", err)
}
userRegistry := userregistry.NewRegistry(useretcd.NewREST(etcdHelper))
identityRegistry := identityregistry.NewRegistry(identityetcd.NewREST(etcdHelper))
useridentityMappingRegistry := useridentitymapping.NewRegistry(useridentitymapping.NewREST(userRegistry, identityRegistry))
lookup := identitymapper.NewLookupIdentityMapper(useridentityMappingRegistry, userRegistry)
provisioner := identitymapper.NewAlwaysCreateUserIdentityToUserMapper(identityRegistry, userRegistry)
testcases := map[string]struct {
Identity authapi.UserIdentityInfo
Mapper authapi.UserIdentityMapper
CreateIdentity *api.Identity
CreateUser *api.User
CreateMapping *api.UserIdentityMapping
UpdateUser *api.User
ExpectedErr error
ExpectedUserName string
ExpectedFullName string
}{
"lookup missing identity": {
Identity: makeIdentityInfo("idp", "bob", nil),
Mapper: lookup,
ExpectedErr: kerrs.NewNotFound("UserIdentityMapping", "idp:bob"),
},
"lookup existing identity": {
Identity: makeIdentityInfo("idp", "bob", nil),
Mapper: lookup,
CreateUser: makeUser("mappeduser"),
CreateIdentity: makeIdentity("idp", "bob"),
CreateMapping: makeMapping("mappeduser", "idp:bob"),
ExpectedUserName: "******",
},
"provision missing identity and user": {
Identity: makeIdentityInfo("idp", "bob", nil),
Mapper: provisioner,
ExpectedUserName: "******",
},
"provision missing identity and user with preferred username and display name": {
Identity: makeIdentityInfo("idp", "bob", map[string]string{authapi.IdentityDisplayNameKey: "Bob, Sr.", authapi.IdentityPreferredUsernameKey: "admin"}),
Mapper: provisioner,
ExpectedUserName: "******",
ExpectedFullName: "Bob, Sr.",
},
"provision missing identity for existing user": {
Identity: makeIdentityInfo("idp", "bob", nil),
Mapper: provisioner,
CreateUser: makeUser("bob", "idp:bob"),
ExpectedUserName: "******",
},
"provision missing identity with conflicting user": {
Identity: makeIdentityInfo("idp", "bob", nil),
Mapper: provisioner,
CreateUser: makeUser("bob"),
ExpectedUserName: "******",
},
"provision missing identity with conflicting user and preferred username": {
Identity: makeIdentityInfo("idp", "bob", map[string]string{authapi.IdentityPreferredUsernameKey: "admin"}),
Mapper: provisioner,
CreateUser: makeUser("admin"),
ExpectedUserName: "******",
},
"provision with existing unmapped identity": {
Identity: makeIdentityInfo("idp", "bob", nil),
Mapper: provisioner,
CreateIdentity: makeIdentity("idp", "bob"),
ExpectedErr: kerrs.NewNotFound("UserIdentityMapping", "idp:bob"),
},
"provision with existing mapped identity with invalid user UID": {
Identity: makeIdentityInfo("idp", "bob", nil),
Mapper: provisioner,
CreateUser: makeUser("mappeduser"),
CreateIdentity: makeIdentityWithUserReference("idp", "bob", "mappeduser", "invalidUID"),
ExpectedErr: kerrs.NewNotFound("UserIdentityMapping", "idp:bob"),
},
"provision with existing mapped identity without user backreference": {
Identity: makeIdentityInfo("idp", "bob", nil),
Mapper: provisioner,
CreateUser: makeUser("mappeduser"),
CreateIdentity: makeIdentity("idp", "bob"),
CreateMapping: makeMapping("mappeduser", "idp:bob"),
// Update user to a version which does not reference the identity
UpdateUser: makeUser("mappeduser"),
ExpectedErr: kerrs.NewNotFound("UserIdentityMapping", "idp:bob"),
},
"provision returns existing mapping": {
Identity: makeIdentityInfo("idp", "bob", nil),
Mapper: provisioner,
CreateUser: makeUser("mappeduser"),
CreateIdentity: makeIdentity("idp", "bob"),
CreateMapping: makeMapping("mappeduser", "idp:bob"),
ExpectedUserName: "******",
},
}
for k, testcase := range testcases {
// Cleanup
if err := etcdHelper.RecursiveDelete(useretcd.EtcdPrefix, true); err != nil && !etcdstorage.IsEtcdNotFound(err) {
t.Fatalf("Could not clean up users: %v", err)
}
if err := etcdHelper.RecursiveDelete(identityetcd.EtcdPrefix, true); err != nil && !etcdstorage.IsEtcdNotFound(err) {
t.Fatalf("Could not clean up identities: %v", err)
}
// Pre-create items
if testcase.CreateUser != nil {
_, err := clusterAdminClient.Users().Create(testcase.CreateUser)
if err != nil {
t.Errorf("%s: Could not create user: %v", k, err)
continue
}
}
if testcase.CreateIdentity != nil {
_, err := clusterAdminClient.Identities().Create(testcase.CreateIdentity)
if err != nil {
t.Errorf("%s: Could not create identity: %v", k, err)
continue
}
}
if testcase.CreateMapping != nil {
_, err := clusterAdminClient.UserIdentityMappings().Update(testcase.CreateMapping)
if err != nil {
t.Errorf("%s: Could not create mapping: %v", k, err)
continue
}
}
if testcase.UpdateUser != nil {
if testcase.UpdateUser.ResourceVersion == "" {
existingUser, err := clusterAdminClient.Users().Get(testcase.UpdateUser.Name)
if err != nil {
t.Errorf("%s: Could not get user to update: %v", k, err)
continue
}
testcase.UpdateUser.ResourceVersion = existingUser.ResourceVersion
}
_, err := clusterAdminClient.Users().Update(testcase.UpdateUser)
if err != nil {
t.Errorf("%s: Could not update user: %v", k, err)
continue
}
}
// Spawn 5 simultaneous mappers to test race conditions
var wg sync.WaitGroup
for i := 0; i < 5; i++ {
wg.Add(1)
go func() {
defer wg.Done()
userInfo, err := testcase.Mapper.UserFor(testcase.Identity)
if err != nil {
if testcase.ExpectedErr == nil {
t.Errorf("%s: Expected success, got error '%v'", k, err)
} else if err.Error() != testcase.ExpectedErr.Error() {
t.Errorf("%s: Expected error %v, got '%v'", k, testcase.ExpectedErr.Error(), err)
}
return
}
if err == nil && testcase.ExpectedErr != nil {
t.Errorf("%s: Expected error '%v', got none", k, testcase.ExpectedErr)
return
}
if userInfo.GetName() != testcase.ExpectedUserName {
t.Errorf("%s: Expected username %s, got %s", k, testcase.ExpectedUserName, userInfo.GetName())
return
}
user, err := clusterAdminClient.Users().Get(userInfo.GetName())
if err != nil {
t.Errorf("%s: Error getting user: %v", k, err)
}
if user.FullName != testcase.ExpectedFullName {
t.Errorf("%s: Expected full name %s, got %s", k, testcase.ExpectedFullName, user.FullName)
}
}()
}
wg.Wait()
}
}
