WIP: updates to flowchart

docs/DESIGN.md

@@ -8,8 +8,9 @@ primitives and gives an overview of the underlying implementation.
 ```mermaid
 flowchart TD
  Start(Start) --> A0[Ensure service.]
- A0 --> A1[Connect to the cluster\nand fetch all statuses.]
- A1 --> |Got some response| AA{All reachable\nmembers have the\nsame cluster ID?}
+ A0 --> A1{Are there any\nendpoints?}
+ A1 --> |Yes| A2[Connect to the cluster\nand fetch all statuses.]
+ A2 --> |Got some response| AA{All reachable\nmembers have the\nsame cluster ID?}
  AA --> |Yes| AAA{Is cluster\nin quorum?}
  AAA --> |Yes| AAAA{Are all members \nmanaged by the operator?}
  AAAA --> |Yes| AAAAA0[Promote any learners.]
@@ -46,8 +47,15 @@ flowchart TD
  AA --> |No| AAB[Cluster is in\nsplit-brain. Set\nerror status.]
  AAB --> AABStop([Stop])
 
- A1 --> |No members\nreached| AB{Is the correct\nzero-replica STS\npresent?}
- AB --> |Yes| ABA{EtcdCluster\n.spec.replicas==0?}
+ A1 --> |No| A1B{Is the STS\npresent?}
+ A1B --> |Yes| A1BA{Does it have the\ncorrect pod spec?}
+ A1BA --> |Yes| A1BAA{Is it\nready?}
+ A1BAA --> |Yes| ABA{Then it must have\nspec.replicas==0\n Is EtcdCluster\n.spec.replicas==0?}
+ A1BAA --> |No| A1BAAB([Stop and wait, either\nit will turn ready soon\nand the next reconcile\nwill move things along,\nor user intervention is\nneeded])
+ A1BA --> |No| A1BAB[Patch the podspec]
+ A1B --> |No| A1BB[Create configmap, initial state new\ninitial cluster according to spec.\nreplicas, create statefulset.]
+ A2 --> |No members\nreached| AB{Is the correct\nzero-replica STS\npresent?}
+ AB --> |Yes|abc 
  ABA --> |Yes| ABAA([Cluster successfully\nscaled to zero, stop.])
  ABA --> |No| ABAB[Ensure ConfigMap with\ninitial cluster = new,\ninitial cluster peers with\nsingle member `name`-0]
  ABAB --> |OK| ABABA[Increment STS size.]
@@ -64,7 +72,4 @@ flowchart TD
  ABB --> |No| ABBB[Create a zero-\nreplica STS]
  ABBB --> |OK| ABBBA([Stop])
  ABBB --> |Error| ABBBB([Requeue])
-
- A0 --> |Unexpected\nerror| AC(Requeue)
- A1 --> |Unexpected\nerror| AC(Requeue)
 ```