diff --git a/.changelog/15034.txt b/.changelog/15034.txt
new file mode 100644
index 000000000000..c418f18b8f77
--- /dev/null
+++ b/.changelog/15034.txt
@@ -0,0 +1,3 @@
+```release-note:bug
+keyring: Removed root key garbage collection to avoid orphaned workload identities
+```
diff --git a/nomad/core_sched.go b/nomad/core_sched.go
index 321da820261f..8abd1c5407d8 100644
--- a/nomad/core_sched.go
+++ b/nomad/core_sched.go
@@ -60,7 +60,7 @@ func (c *CoreScheduler) Process(eval *structs.Evaluation) error {
case structs.CoreJobGlobalTokenExpiredGC:
return c.expiredACLTokenGC(eval, true)
case structs.CoreJobRootKeyRotateOrGC:
- return c.rootKeyRotateOrGC(eval)
+ return c.rootKeyRotate(eval)
case structs.CoreJobVariablesRekey:
return c.variablesRekey(eval)
case structs.CoreJobForceGC:
@@ -96,9 +96,7 @@ func (c *CoreScheduler) forceGC(eval *structs.Evaluation) error {
if err := c.expiredACLTokenGC(eval, true); err != nil {
return err
}
- if err := c.rootKeyGC(eval); err != nil {
- return err
- }
+
// Node GC must occur after the others to ensure the allocations are
// cleared.
return c.nodeGC(eval)
@@ -895,86 +893,9 @@ func (c *CoreScheduler) expiredACLTokenGC(eval *structs.Evaluation, global bool)
return c.srv.RPC(structs.ACLDeleteTokensRPCMethod, req, &structs.GenericResponse{})
}
-// rootKeyRotateOrGC is used to rotate or garbage collect root keys
-func (c *CoreScheduler) rootKeyRotateOrGC(eval *structs.Evaluation) error {
-
- // a rotation will be sent to the leader so our view of state
- // is no longer valid. we ack this core job and will pick up
- // the GC work on the next interval
- wasRotated, err := c.rootKeyRotation(eval)
- if err != nil {
- return err
- }
- if wasRotated {
- return nil
- }
- return c.rootKeyGC(eval)
-}
-
-func (c *CoreScheduler) rootKeyGC(eval *structs.Evaluation) error {
-
- // we can't GC any key older than the oldest live allocation
- // because it might have signed that allocation's workload
- // identity; this is conservative so that we don't have to iterate
- // over all the allocations and find out which keys signed their
- // identity, which will be expensive on large clusters
- allocOldThreshold, err := c.getOldestAllocationIndex()
- if err != nil {
- return err
- }
-
- oldThreshold := c.getThreshold(eval, "root key",
- "root_key_gc_threshold", c.srv.config.RootKeyGCThreshold)
-
- ws := memdb.NewWatchSet()
- iter, err := c.snap.RootKeyMetas(ws)
- if err != nil {
- return err
- }
-
- for {
- raw := iter.Next()
- if raw == nil {
- break
- }
- keyMeta := raw.(*structs.RootKeyMeta)
- if keyMeta.Active() {
- continue // never GC the active key
- }
- if keyMeta.CreateIndex > oldThreshold {
- continue // don't GC recent keys
- }
- if keyMeta.CreateIndex > allocOldThreshold {
- continue // don't GC keys possibly used to sign live allocations
- }
- varIter, err := c.snap.GetVariablesByKeyID(ws, keyMeta.KeyID)
- if err != nil {
- return err
- }
- if varIter.Next() != nil {
- continue // key is still in use
- }
-
- req := &structs.KeyringDeleteRootKeyRequest{
- KeyID: keyMeta.KeyID,
- WriteRequest: structs.WriteRequest{
- Region: c.srv.config.Region,
- AuthToken: eval.LeaderACL,
- },
- }
- if err := c.srv.RPC("Keyring.Delete",
- req, &structs.KeyringDeleteRootKeyResponse{}); err != nil {
- c.logger.Error("root key delete failed", "error", err)
- return err
- }
- }
-
- return nil
-}
-
-// rootKeyRotation checks if the active key is old enough that we need
-// to kick off a rotation. Returns true if the key was rotated.
-func (c *CoreScheduler) rootKeyRotation(eval *structs.Evaluation) (bool, error) {
+// rootKeyRotate checks if the active key is old enough that we need
+// to kick off a rotation.
+func (c *CoreScheduler) rootKeyRotate(eval *structs.Evaluation) error {
rotationThreshold := c.getThreshold(eval, "root key",
"root_key_rotation_threshold", c.srv.config.RootKeyRotationThreshold)
@@ -982,13 +903,13 @@ func (c *CoreScheduler) rootKeyRotation(eval *structs.Evaluation) (bool, error)
ws := memdb.NewWatchSet()
activeKey, err := c.snap.GetActiveRootKeyMeta(ws)
if err != nil {
- return false, err
+ return err
}
if activeKey == nil {
- return false, nil // no active key
+ return nil // no active key
}
if activeKey.CreateIndex >= rotationThreshold {
- return false, nil // key is too new
+ return nil // key is too new
}
req := &structs.KeyringRotateRootKeyRequest{
@@ -1000,10 +921,10 @@ func (c *CoreScheduler) rootKeyRotation(eval *structs.Evaluation) (bool, error)
if err := c.srv.RPC("Keyring.Rotate",
req, &structs.KeyringRotateRootKeyResponse{}); err != nil {
c.logger.Error("root key rotation failed", "error", err)
- return false, err
+ return err
}
- return true, nil
+ return nil
}
// variablesReKey is optionally run after rotating the active
diff --git a/nomad/core_sched_test.go b/nomad/core_sched_test.go
index 27b8410f3c48..66aa3b2d9f33 100644
--- a/nomad/core_sched_test.go
+++ b/nomad/core_sched_test.go
@@ -2471,73 +2471,33 @@ func TestCoreScheduler_RootKeyGC(t *testing.T) {
require.NotNil(t, key0, "expected keyring to be bootstapped")
require.NoError(t, err)
- // insert an "old" and inactive key
- key1 := structs.NewRootKeyMeta()
- key1.SetInactive()
- require.NoError(t, store.UpsertRootKeyMeta(500, key1, false))
-
- // insert an "old" and inactive key with a variable that's using it
- key2 := structs.NewRootKeyMeta()
- key2.SetInactive()
- require.NoError(t, store.UpsertRootKeyMeta(600, key2, false))
-
- variable := mock.VariableEncrypted()
- variable.KeyID = key2.KeyID
-
- setResp := store.VarSet(601, &structs.VarApplyStateRequest{
- Op: structs.VarOpSet,
- Var: variable,
- })
- require.NoError(t, setResp.Error)
-
- // insert an allocation
- alloc := mock.Alloc()
- alloc.ClientStatus = structs.AllocClientStatusRunning
- require.NoError(t, store.UpsertAllocs(
- structs.MsgTypeTestSetup, 700, []*structs.Allocation{alloc}))
-
- // insert an "old" key that's newer than oldest alloc
- key3 := structs.NewRootKeyMeta()
- key3.SetInactive()
- require.NoError(t, store.UpsertRootKeyMeta(750, key3, false))
-
- // insert a time table index before the last key
- tt := srv.fsm.TimeTable()
- tt.Witness(1000, time.Now().UTC().Add(-1*srv.config.RootKeyGCThreshold))
-
- // insert a "new" but inactive key
- key4 := structs.NewRootKeyMeta()
- key4.SetInactive()
- require.NoError(t, store.UpsertRootKeyMeta(1500, key4, false))
-
// run the core job
snap, err := store.Snapshot()
require.NoError(t, err)
core := NewCoreScheduler(srv, snap)
eval := srv.coreJobEval(structs.CoreJobRootKeyRotateOrGC, 2000)
c := core.(*CoreScheduler)
- require.NoError(t, c.rootKeyRotateOrGC(eval))
+ require.NoError(t, c.rootKeyRotate(eval))
- ws := memdb.NewWatchSet()
- key, err := store.RootKeyMetaByID(ws, key0.KeyID)
- require.NoError(t, err)
- require.NotNil(t, key, "active key should not have been GCd")
+ got, err := store.GetActiveRootKeyMeta(nil)
+ require.NotNil(t, got, "expected keyring to have an active key")
+ require.Equal(t, got.KeyID, key0.KeyID)
- key, err = store.RootKeyMetaByID(ws, key1.KeyID)
- require.NoError(t, err)
- require.Nil(t, key, "old key should have been GCd")
-
- key, err = store.RootKeyMetaByID(ws, key2.KeyID)
- require.NoError(t, err)
- require.NotNil(t, key, "old key should not have been GCd if still in use")
-
- key, err = store.RootKeyMetaByID(ws, key3.KeyID)
- require.NoError(t, err)
- require.NotNil(t, key, "old key newer than oldest alloc should not have been GCd")
+ // insert a time table index after the key
+ tt := srv.fsm.TimeTable()
+ tt.Witness(3000, time.Now().UTC().Add(-1*srv.config.RootKeyRotationThreshold))
- key, err = store.RootKeyMetaByID(ws, key4.KeyID)
+ // re-run the core job
+ snap, err = store.Snapshot()
require.NoError(t, err)
- require.NotNil(t, key, "new key should not have been GCd")
+ core = NewCoreScheduler(srv, snap)
+ eval = srv.coreJobEval(structs.CoreJobRootKeyRotateOrGC, 4000)
+ c = core.(*CoreScheduler)
+ require.NoError(t, c.rootKeyRotate(eval))
+
+ got, err = store.GetActiveRootKeyMeta(nil)
+ require.NotNil(t, got, "expected keyring to have an active key")
+ require.NotEqual(t, got.KeyID, key0.KeyID)
}
// TestCoreScheduler_VariablesRekey exercises variables rekeying
diff --git a/website/content/docs/configuration/server.mdx b/website/content/docs/configuration/server.mdx
index d12ae04fdff5..efdc68f04f4b 100644
--- a/website/content/docs/configuration/server.mdx
+++ b/website/content/docs/configuration/server.mdx
@@ -200,15 +200,11 @@ server {
rejoin the cluster.
- `root_key_gc_interval` `(string: "10m")` - Specifies the interval between
- [encryption key][] metadata garbage collections.
-
-- `root_key_gc_threshold` `(string: "1h")` - Specifies the minimum time that an
- [encryption key][] must exist before it can be eligible for garbage
- collection.
+ checks to rotate the root [encryption key][].
- `root_key_rotation_threshold` `(string: "720h")` - Specifies the minimum time
that an [encryption key][] must exist before it is automatically rotated on
- the next garbage collection interval.
+ the next `root_key_gc_interval`.
- `server_join` ([server_join][server-join]: nil) - Specifies
how the Nomad server will connect to other Nomad servers. The `retry_join`
@@ -392,7 +388,7 @@ regardless of cluster size.
The base formula for determining how often a Client must heartbeat is:
```
- /
+ /
```
Other factors modify this base TTL:
@@ -408,7 +404,7 @@ Other factors modify this base TTL:
to successfully heartbeat. This gives Clients time to discover a functioning
Server in case they were directly connected to a leader that crashed.
-For example, given the default values for heartbeat parameters, different sized
+For example, given the default values for heartbeat parameters, different sized
clusters will use the following TTLs for the heartbeats. Note that the `Server TTL`
simply adds the `heartbeat_grace` parameter to the TTL Clients are given.
@@ -425,7 +421,7 @@ Regardless of size, all clients will have a Server TTL of
than the maximum Client TTL for your cluster size in order to prevent marking
live Clients as `down`.
-For clusters over 5000 Clients you should increase `failover_heartbeat_ttl`
+For clusters over 5000 Clients you should increase `failover_heartbeat_ttl`
using the following formula:
```