Merge pull request #59357 from kubernetes/revert-57683-kube-dns-anti-affinity

Automatic merge from submit-queue (batch tested with PRs 59158, 38320, 59059, 55516, 59357). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Revert "Add self anti-affinity to kube-dns pods"

Reverts kubernetes/kubernetes#57683

Fixes https://github.com/kubernetes/kubernetes/issues/54164

/cc @wojtek-t 
cc @bsalamat @misterikkit @bowei @MrHohn

cluster/addons/dns/kube-dns.yaml.base

@@ -84,17 +84,6 @@ spec:
       annotations:
         scheduler.alpha.kubernetes.io/critical-pod: ''
     spec:
-      affinity:
-        podAntiAffinity:
-          preferredDuringSchedulingIgnoredDuringExecution:
-          - weight: 100
-            podAffinityTerm:
-              labelSelector:
-                matchExpressions:
-                  - key: k8s-app
-                    operator: In
-                    values: ["kube-dns"]
-              topologyKey: kubernetes.io/hostname
       tolerations:
       - key: "CriticalAddonsOnly"
         operator: "Exists"

cluster/addons/dns/kube-dns.yaml.in

@@ -84,17 +84,6 @@ spec:
       annotations:
         scheduler.alpha.kubernetes.io/critical-pod: ''
     spec:
-      affinity:
-        podAntiAffinity:
-          preferredDuringSchedulingIgnoredDuringExecution:
-          - weight: 100
-            podAffinityTerm:
-              labelSelector:
-                matchExpressions:
-                  - key: k8s-app
-                    operator: In
-                    values: ["kube-dns"]
-              topologyKey: kubernetes.io/hostname
       tolerations:
       - key: "CriticalAddonsOnly"
         operator: "Exists"

cluster/addons/dns/kube-dns.yaml.sed

@@ -84,17 +84,6 @@ spec:
       annotations:
         scheduler.alpha.kubernetes.io/critical-pod: ''
     spec:
-      affinity:
-        podAntiAffinity:
-          preferredDuringSchedulingIgnoredDuringExecution:
-          - weight: 100
-            podAffinityTerm:
-              labelSelector:
-                matchExpressions:
-                  - key: k8s-app
-                    operator: In
-                    values: ["kube-dns"]
-              topologyKey: kubernetes.io/hostname
       tolerations:
       - key: "CriticalAddonsOnly"
         operator: "Exists"