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manager.go
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manager.go
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// Package manager contains an identity manager responsible for refreshing sessions and creating users.
package manager
import (
"context"
"errors"
"time"
"github.com/google/btree"
"github.com/rs/zerolog"
"golang.org/x/oauth2"
"golang.org/x/sync/errgroup"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
"google.golang.org/protobuf/types/known/timestamppb"
"github.com/pomerium/pomerium/internal/atomicutil"
"github.com/pomerium/pomerium/internal/events"
"github.com/pomerium/pomerium/internal/identity/identity"
"github.com/pomerium/pomerium/internal/log"
"github.com/pomerium/pomerium/internal/scheduler"
"github.com/pomerium/pomerium/internal/telemetry/metrics"
"github.com/pomerium/pomerium/pkg/grpc/databroker"
"github.com/pomerium/pomerium/pkg/grpc/session"
"github.com/pomerium/pomerium/pkg/grpc/user"
"github.com/pomerium/pomerium/pkg/grpcutil"
metrics_ids "github.com/pomerium/pomerium/pkg/metrics"
)
// Authenticator is an identity.Provider with only the methods needed by the manager.
type Authenticator interface {
Refresh(context.Context, *oauth2.Token, identity.State) (*oauth2.Token, error)
Revoke(context.Context, *oauth2.Token) error
UpdateUserInfo(context.Context, *oauth2.Token, interface{}) error
}
type (
updateRecordsMessage struct {
records []*databroker.Record
}
)
// A Manager refreshes identity information using session and user data.
type Manager struct {
cfg *atomicutil.Value[*config]
sessionScheduler *scheduler.Scheduler
userScheduler *scheduler.Scheduler
sessions sessionCollection
users userCollection
}
// New creates a new identity manager.
func New(
options ...Option,
) *Manager {
mgr := &Manager{
cfg: atomicutil.NewValue(newConfig()),
sessionScheduler: scheduler.New(),
userScheduler: scheduler.New(),
}
mgr.reset()
mgr.UpdateConfig(options...)
return mgr
}
func withLog(ctx context.Context) context.Context {
return log.WithContext(ctx, func(c zerolog.Context) zerolog.Context {
return c.Str("service", "identity_manager")
})
}
// UpdateConfig updates the manager with the new options.
func (mgr *Manager) UpdateConfig(options ...Option) {
mgr.cfg.Store(newConfig(options...))
}
// Run runs the manager. This method blocks until an error occurs or the given context is canceled.
func (mgr *Manager) Run(ctx context.Context) error {
leaser := databroker.NewLeaser("identity_manager", time.Second*30, mgr)
return leaser.Run(ctx)
}
// RunLeased runs the identity manager when a lease is acquired.
func (mgr *Manager) RunLeased(ctx context.Context) error {
ctx = withLog(ctx)
update := make(chan updateRecordsMessage, 1)
clear := make(chan struct{}, 1)
syncer := newDataBrokerSyncer(ctx, mgr.cfg, update, clear)
eg, ctx := errgroup.WithContext(ctx)
eg.Go(func() error {
return syncer.Run(ctx)
})
eg.Go(func() error {
return mgr.refreshLoop(ctx, update, clear)
})
return eg.Wait()
}
// GetDataBrokerServiceClient gets the databroker client.
func (mgr *Manager) GetDataBrokerServiceClient() databroker.DataBrokerServiceClient {
return mgr.cfg.Load().dataBrokerClient
}
func (mgr *Manager) refreshLoop(ctx context.Context, update <-chan updateRecordsMessage, clear <-chan struct{}) error {
// wait for initial sync
select {
case <-ctx.Done():
return ctx.Err()
case <-clear:
mgr.reset()
}
select {
case <-ctx.Done():
case msg := <-update:
mgr.onUpdateRecords(ctx, msg)
}
log.Info(ctx).
Int("sessions", mgr.sessions.Len()).
Int("users", mgr.users.Len()).
Msg("initial sync complete")
// start refreshing
maxWait := time.Minute * 10
nextTime := time.Now().Add(maxWait)
timer := time.NewTimer(time.Until(nextTime))
defer timer.Stop()
for {
select {
case <-ctx.Done():
return ctx.Err()
case <-clear:
mgr.reset()
case msg := <-update:
mgr.onUpdateRecords(ctx, msg)
case <-timer.C:
}
now := time.Now()
nextTime = now.Add(maxWait)
// refresh sessions
for {
tm, key := mgr.sessionScheduler.Next()
if now.Before(tm) {
if tm.Before(nextTime) {
nextTime = tm
}
break
}
mgr.sessionScheduler.Remove(key)
userID, sessionID := fromSessionSchedulerKey(key)
mgr.refreshSession(ctx, userID, sessionID)
}
// refresh users
for {
tm, key := mgr.userScheduler.Next()
if now.Before(tm) {
if tm.Before(nextTime) {
nextTime = tm
}
break
}
mgr.userScheduler.Remove(key)
mgr.refreshUser(ctx, key)
}
metrics.RecordIdentityManagerLastRefresh(ctx)
timer.Reset(time.Until(nextTime))
}
}
func (mgr *Manager) refreshSession(ctx context.Context, userID, sessionID string) {
log.Info(ctx).
Str("user_id", userID).
Str("session_id", sessionID).
Msg("refreshing session")
authenticator := mgr.cfg.Load().authenticator
if authenticator == nil {
log.Info(ctx).
Str("user_id", userID).
Str("session_id", sessionID).
Msg("no authenticator defined, deleting session")
mgr.deleteSession(ctx, userID, sessionID)
return
}
s, ok := mgr.sessions.Get(userID, sessionID)
if !ok {
log.Warn(ctx).
Str("user_id", userID).
Str("session_id", sessionID).
Msg("no session found for refresh")
return
}
expiry := s.GetExpiresAt().AsTime()
if !expiry.After(time.Now()) {
log.Info(ctx).
Str("user_id", userID).
Str("session_id", sessionID).
Msg("deleting expired session")
mgr.deleteSession(ctx, userID, sessionID)
return
}
if s.Session == nil || s.Session.OauthToken == nil {
log.Warn(ctx).
Str("user_id", userID).
Str("session_id", sessionID).
Msg("no session oauth2 token found for refresh")
return
}
newToken, err := authenticator.Refresh(ctx, FromOAuthToken(s.OauthToken), &s)
metrics.RecordIdentityManagerSessionRefresh(ctx, err)
mgr.recordLastError(metrics_ids.IdentityManagerLastSessionRefreshError, err)
if isTemporaryError(err) {
log.Error(ctx).Err(err).
Str("user_id", s.GetUserId()).
Str("session_id", s.GetId()).
Msg("failed to refresh oauth2 token")
return
} else if err != nil {
log.Error(ctx).Err(err).
Str("user_id", s.GetUserId()).
Str("session_id", s.GetId()).
Msg("failed to refresh oauth2 token, deleting session")
mgr.deleteSession(ctx, userID, sessionID)
return
}
s.OauthToken = ToOAuthToken(newToken)
err = authenticator.UpdateUserInfo(ctx, FromOAuthToken(s.OauthToken), &s)
metrics.RecordIdentityManagerUserRefresh(ctx, err)
mgr.recordLastError(metrics_ids.IdentityManagerLastUserRefreshError, err)
if isTemporaryError(err) {
log.Error(ctx).Err(err).
Str("user_id", s.GetUserId()).
Str("session_id", s.GetId()).
Msg("failed to update user info")
return
} else if err != nil {
log.Error(ctx).Err(err).
Str("user_id", s.GetUserId()).
Str("session_id", s.GetId()).
Msg("failed to update user info, deleting session")
mgr.deleteSession(ctx, userID, sessionID)
return
}
res, err := session.Put(ctx, mgr.cfg.Load().dataBrokerClient, s.Session)
if err != nil {
log.Error(ctx).Err(err).
Str("user_id", s.GetUserId()).
Str("session_id", s.GetId()).
Msg("failed to update session")
return
}
mgr.onUpdateSession(ctx, res.GetRecord(), s.Session)
}
func (mgr *Manager) refreshUser(ctx context.Context, userID string) {
log.Info(ctx).
Str("user_id", userID).
Msg("refreshing user")
authenticator := mgr.cfg.Load().authenticator
if authenticator == nil {
return
}
u, ok := mgr.users.Get(userID)
if !ok {
log.Warn(ctx).
Str("user_id", userID).
Msg("no user found for refresh")
return
}
u.lastRefresh = time.Now()
mgr.userScheduler.Add(u.NextRefresh(), u.GetId())
for _, s := range mgr.sessions.GetSessionsForUser(userID) {
if s.Session == nil || s.Session.OauthToken == nil {
log.Warn(ctx).
Str("user_id", userID).
Msg("no session oauth2 token found for refresh")
continue
}
err := authenticator.UpdateUserInfo(ctx, FromOAuthToken(s.OauthToken), &u)
metrics.RecordIdentityManagerUserRefresh(ctx, err)
mgr.recordLastError(metrics_ids.IdentityManagerLastUserRefreshError, err)
if isTemporaryError(err) {
log.Error(ctx).Err(err).
Str("user_id", s.GetUserId()).
Str("session_id", s.GetId()).
Msg("failed to update user info")
return
} else if err != nil {
log.Error(ctx).Err(err).
Str("user_id", s.GetUserId()).
Str("session_id", s.GetId()).
Msg("failed to update user info, deleting session")
mgr.deleteSession(ctx, userID, s.GetId())
continue
}
res, err := databroker.Put(ctx, mgr.cfg.Load().dataBrokerClient, u.User)
if err != nil {
log.Error(ctx).Err(err).
Str("user_id", s.GetUserId()).
Str("session_id", s.GetId()).
Msg("failed to update user")
continue
}
mgr.onUpdateUser(ctx, res.GetRecords()[0], u.User)
}
}
func (mgr *Manager) onUpdateRecords(ctx context.Context, msg updateRecordsMessage) {
for _, record := range msg.records {
switch record.GetType() {
case grpcutil.GetTypeURL(new(session.Session)):
var pbSession session.Session
err := record.GetData().UnmarshalTo(&pbSession)
if err != nil {
log.Warn(ctx).Msgf("error unmarshaling session: %s", err)
continue
}
mgr.onUpdateSession(ctx, record, &pbSession)
case grpcutil.GetTypeURL(new(user.User)):
var pbUser user.User
err := record.GetData().UnmarshalTo(&pbUser)
if err != nil {
log.Warn(ctx).Msgf("error unmarshaling user: %s", err)
continue
}
mgr.onUpdateUser(ctx, record, &pbUser)
}
}
}
func (mgr *Manager) onUpdateSession(_ context.Context, record *databroker.Record, session *session.Session) {
mgr.sessionScheduler.Remove(toSessionSchedulerKey(session.GetUserId(), session.GetId()))
if record.GetDeletedAt() != nil {
mgr.sessions.Delete(session.GetUserId(), session.GetId())
return
}
// update session
s, _ := mgr.sessions.Get(session.GetUserId(), session.GetId())
s.lastRefresh = time.Now()
s.gracePeriod = mgr.cfg.Load().sessionRefreshGracePeriod
s.coolOffDuration = mgr.cfg.Load().sessionRefreshCoolOffDuration
s.Session = session
mgr.sessions.ReplaceOrInsert(s)
mgr.sessionScheduler.Add(s.NextRefresh(), toSessionSchedulerKey(session.GetUserId(), session.GetId()))
}
func (mgr *Manager) onUpdateUser(_ context.Context, record *databroker.Record, user *user.User) {
mgr.userScheduler.Remove(user.GetId())
if record.GetDeletedAt() != nil {
mgr.users.Delete(user.GetId())
return
}
u, _ := mgr.users.Get(user.GetId())
u.lastRefresh = mgr.cfg.Load().now()
u.User = user
mgr.users.ReplaceOrInsert(u)
mgr.userScheduler.Add(u.NextRefresh(), u.GetId())
}
func (mgr *Manager) deleteSession(ctx context.Context, userID, sessionID string) {
mgr.sessionScheduler.Remove(toSessionSchedulerKey(userID, sessionID))
mgr.sessions.Delete(userID, sessionID)
client := mgr.cfg.Load().dataBrokerClient
res, err := client.Get(ctx, &databroker.GetRequest{
Type: grpcutil.GetTypeURL(new(session.Session)),
Id: sessionID,
})
if status.Code(err) == codes.NotFound {
return
} else if err != nil {
log.Error(ctx).Err(err).
Str("session_id", sessionID).
Msg("failed to delete session")
return
}
record := res.GetRecord()
record.DeletedAt = timestamppb.Now()
_, err = client.Put(ctx, &databroker.PutRequest{
Records: []*databroker.Record{record},
})
if err != nil {
log.Error(ctx).Err(err).
Str("session_id", sessionID).
Msg("failed to delete session")
return
}
}
// reset resets all the manager datastructures to their initial state
func (mgr *Manager) reset() {
mgr.sessions = sessionCollection{BTree: btree.New(8)}
mgr.users = userCollection{BTree: btree.New(8)}
}
func (mgr *Manager) recordLastError(id string, err error) {
if err == nil {
return
}
evtMgr := mgr.cfg.Load().eventMgr
if evtMgr == nil {
return
}
evtMgr.Dispatch(&events.LastError{
Time: timestamppb.Now(),
Message: err.Error(),
Id: id,
})
}
func isTemporaryError(err error) bool {
if err == nil {
return false
}
if errors.Is(err, context.DeadlineExceeded) || errors.Is(err, context.Canceled) {
return true
}
if e, ok := err.(interface{ Temporary() bool }); ok && e.Temporary() {
return true
}
return false
}