Add podAntiAffinity labels to remaining HA control plane pods (#5409)

Fixes: #5347

Add podAntiAffinity to eventing-controller, pingsource-mt-adapter and
sugar-controller pods

config/channels/in-memory-channel/deployments/controller.yaml

@@ -29,6 +29,14 @@ spec:
  metadata:
  labels: *labels
  spec:
+ affinity:
+ podAntiAffinity:
+ preferredDuringSchedulingIgnoredDuringExecution:
+ - podAffinityTerm:
+ labelSelector:
+ matchLabels: *labels
+ topologyKey: kubernetes.io/hostname
+ weight: 100
  serviceAccountName: imc-controller
  enableServiceLinks: false
  containers:

config/core/deployments/pingsource-mt-adapter.yaml

@@ -23,16 +23,23 @@ spec:
  # when set to 0 (and only 0) will be set to 1 when the first PingSource is created.
  replicas: 0
  selector:
- matchLabels:
+ matchLabels: &labels
  eventing.knative.dev/source: ping-source-controller
  sources.knative.dev/role: adapter
  template:
  metadata:
  labels:
- eventing.knative.dev/source: ping-source-controller
- sources.knative.dev/role: adapter
+ <<: *labels
  eventing.knative.dev/release: devel
  spec:
+ affinity:
+ podAntiAffinity:
+ preferredDuringSchedulingIgnoredDuringExecution:
+ - podAffinityTerm:
+ labelSelector:
+ matchLabels: *labels
+ topologyKey: kubernetes.io/hostname
+ weight: 100
  enableServiceLinks: false
  containers:
  - name: dispatcher

config/sugar/500-controller.yaml

@@ -27,6 +27,14 @@ spec:
  metadata:
  labels: *labels
  spec:
+ affinity:
+ podAntiAffinity:
+ preferredDuringSchedulingIgnoredDuringExecution:
+ - podAffinityTerm:
+ labelSelector:
+ matchLabels: *labels
+ topologyKey: kubernetes.io/hostname
+ weight: 100
  serviceAccountName: eventing-controller
  enableServiceLinks: false
  containers: