diff --git a/FLOW.md b/FLOW.md
new file mode 100644
index 0000000..689bd23
--- /dev/null
+++ b/FLOW.md
@@ -0,0 +1,60 @@
+## Creating a service or VM
+
+### Service
+
+- have kustomized manifests
+- creates IPv6 only, probably certificate enabled service
+- external (???) proxy
+  - internal: could have a mapped IPv4 address
+- pvc for storage
+ - rbd vs cephfs decision in general + per use case
+
+### External/other DNS
+
+- needs to be pointed to the service IP
+- kustomized manifests need to be updated/annotated ("also this
+  domain")
+
+## Service List
+
+### DNS servers
+
+- bind / knot
+- authoritatitve
+- files in cephfs?
+- IPv4 from outside (jool)?
+
+### Matrix
+
+### Django
+
+- moving sample site(s)
+- f.i. ula registry
+
+### Etherpad
+
+- cephfs based pvc
+
+### wireguard
+
+- via mapped IPv4 for outside
+- via routing -- might be able to includ bird (?)
+- network mapping in kustomize, later netbox api?
+- peers in configmap (?)
+
+### Nextcloud
+
+- pvc -> cephfs, s3, rbd?
+  - need to test resize
+
+### IPv4
+
+- can we use a crd/operator for this?
+- Jool inside cluster
+- Routed /24 or similar
+- Distribution based on label(s) to pods/services
+- Maybe using an ingress (+IPv4)
+
+## Clusters
+
+- Distributed over places?
diff --git a/rook/README.md b/rook/README.md
index a2f919e..794c4e8 100644
--- a/rook/README.md
+++ b/rook/README.md
@@ -105,6 +105,5 @@ the cluster. So we need to set one of them, if persistentvolumeclaims
 should be deployed:
 
 ```
-[21:22] server47.place7:~/ungleich-k8s/rook# kubectl patch storageclass rook-ceph-block -p '{"metadata": {"annotations":{"stor
-ageclass.kubernetes.io/is-default-class":"true"}}}'
+[21:22] server47.place7:~/ungleich-k8s/rook# kubectl patch storageclass rook-ceph-block -p '{"metadata": {"annotations":{"storageclass.kubernetes.io/is-default-class":"true"}}}'
 ```
diff --git a/rook/pvc-readwritemany.yaml b/rook/pvc-readwritemany.yaml
deleted file mode 100644
index 3547727..0000000
--- a/rook/pvc-readwritemany.yaml
+++ /dev/null
@@ -1,24 +0,0 @@
----
-apiVersion: v1
-kind: PersistentVolumeClaim
-metadata:
-  name: pvc-multitest-cephfs
-spec:
-  accessModes:
-    - ReadWriteMany
-  resources:
-    requests:
-      storage: 200Mi
-  storageClassName: rook-cephfs
----
-apiVersion: v1
-kind: PersistentVolumeClaim
-metadata:
-  name: pvc-multitest-rbd
-spec:
-  accessModes:
-    - ReadWriteMany
-  resources:
-    requests:
-      storage: 200Mi
-  storageClassName: rook-ceph-block
diff --git a/rook/pvc.yaml b/rook/pvc.yaml
deleted file mode 100644
index 516a5aa..0000000
--- a/rook/pvc.yaml
+++ /dev/null
@@ -1,12 +0,0 @@
----
-apiVersion: v1
-kind: PersistentVolumeClaim
-metadata:
-  name: rbd-pvc
-spec:
-  accessModes:
-    - ReadWriteOnce
-  resources:
-    requests:
-      storage: 1Gi
-  storageClassName: rook-ceph-block
diff --git a/v3-calico/README.md b/v3-calico/README.md
index b446a8e..ecefb77 100644
--- a/v3-calico/README.md
+++ b/v3-calico/README.md
@@ -109,7 +109,7 @@ kubectl apply -f nginx-test-deployment.yaml
 Based on https://kubevirt.io/user-guide/operations/installation/:
 
 ```
-export RELEASE=v0.41.0
+export RELEASE=v0.42.1
 # Deploy the KubeVirt operator
 kubectl apply -f https://github.com/kubevirt/kubevirt/releases/download/${RELEASE}/kubevirt-operator.yaml
 # Create the KubeVirt CR (instance deployment request) which triggers the actual installation