nodes: Mention gitaly in 'ErrPrimaryNotHealthy'

Gitaly errors messages will be shown to end-users in the web UI.
Without knowing that the error message for 'ErrPrimaryNotHealthy' is
from Praefect, it's difficult for users to understand what 'primary' is
referring to.

Let's mention that Gitaly is the source of the failure to make this less
confusing.

Changelog: changed

2 files changed, 4 insertions, 4 deletions

diff --git a/internal/praefect/coordinator_test.go b/internal/praefect/coordinator_test.go
index 0b3c28b7a..371046653 100644
--- a/internal/praefect/coordinator_test.go
+++ b/internal/praefect/coordinator_test.go
@@ -1293,7 +1293,7 @@ func TestStreamDirectorStorageScopeError(t *testing.T) {
 		require.Equal(t, "virtual storage does not exist", result.Message())
 	})
 
-	t.Run("primary is not healthy", func(t *testing.T) {
+	t.Run("primary gitaly is not healthy", func(t *testing.T) {
 		t.Run("accessor", func(t *testing.T) {
 			mgr := &nodes.MockManager{
 				GetShardFunc: func(s string) (nodes.Shard, error) {
@@ -1323,7 +1323,7 @@ func TestStreamDirectorStorageScopeError(t *testing.T) {
 			result, ok := status.FromError(err)
 			require.True(t, ok)
 			require.Equal(t, codes.Internal, result.Code())
-			require.Equal(t, `accessor storage scoped: route storage accessor "fake": primary is not healthy`, result.Message())
+			require.Equal(t, `accessor storage scoped: route storage accessor "fake": primary gitaly is not healthy`, result.Message())
 		})
 
 		t.Run("mutator", func(t *testing.T) {
@@ -1354,7 +1354,7 @@ func TestStreamDirectorStorageScopeError(t *testing.T) {
 			result, ok := status.FromError(err)
 			require.True(t, ok)
 			require.Equal(t, codes.Internal, result.Code())
-			require.Equal(t, `mutator storage scoped: get shard "fake": primary is not healthy`, result.Message())
+			require.Equal(t, `mutator storage scoped: get shard "fake": primary gitaly is not healthy`, result.Message())
 		})
 	})
 }
diff --git a/internal/praefect/nodes/manager.go b/internal/praefect/nodes/manager.go
index 87351e56e..7966a740d 100644
--- a/internal/praefect/nodes/manager.go
+++ b/internal/praefect/nodes/manager.go
@@ -113,7 +113,7 @@ type leaderElectionStrategy interface {
 
 // ErrPrimaryNotHealthy indicates the primary of a shard is not in a healthy state and hence
 // should not be used for a new request
-var ErrPrimaryNotHealthy = errors.New("primary is not healthy")
+var ErrPrimaryNotHealthy = errors.New("primary gitaly is not healthy")
 
 const dialTimeout = 10 * time.Second