chore(k8s): add inter-pod affinity

Author: NGPixel

k8s/auth.yaml

@@ -15,6 +15,16 @@ spec:
       labels:
         app: auth
     spec:
+      affinity:
+        podAffinity:
+          requiredDuringSchedulingIgnoredDuringExecution:
+            - labelSelector:
+                matchExpressions:
+                  - key: app
+                    operator: In
+                    values:
+                      - datatracker
+              topologyKey: "kubernetes.io/hostname"
       securityContext:
         runAsNonRoot: true
       containers:

k8s/beat.yaml

@@ -17,6 +17,16 @@ spec:
       labels:
         app: beat
     spec:
+      affinity:
+        podAffinity:
+          requiredDuringSchedulingIgnoredDuringExecution:
+            - labelSelector:
+                matchExpressions:
+                  - key: app
+                    operator: In
+                    values:
+                      - datatracker
+              topologyKey: "kubernetes.io/hostname"
       securityContext:
         runAsNonRoot: true
       containers:

k8s/celery.yaml

@@ -17,6 +17,16 @@ spec:
       labels:
         app: celery
     spec:
+      affinity:
+        podAffinity:
+          requiredDuringSchedulingIgnoredDuringExecution:
+            - labelSelector:
+                matchExpressions:
+                  - key: app
+                    operator: In
+                    values:
+                      - datatracker
+              topologyKey: "kubernetes.io/hostname"
       securityContext:
         runAsNonRoot: true
       containers:

k8s/memcached.yaml

@@ -13,6 +13,16 @@ spec:
       labels:
         app: memcached
     spec:
+      affinity:
+        podAffinity:
+          requiredDuringSchedulingIgnoredDuringExecution:
+            - labelSelector:
+                matchExpressions:
+                  - key: app
+                    operator: In
+                    values:
+                      - datatracker
+              topologyKey: "kubernetes.io/hostname"
       securityContext:
         runAsNonRoot: true
       containers:

k8s/rabbitmq.yaml

@@ -13,6 +13,16 @@ spec:
       labels:
         app: rabbitmq
     spec:
+      affinity:
+        podAffinity:
+          requiredDuringSchedulingIgnoredDuringExecution:
+            - labelSelector:
+                matchExpressions:
+                  - key: app
+                    operator: In
+                    values:
+                      - datatracker
+              topologyKey: "kubernetes.io/hostname"
       securityContext:
         runAsNonRoot: true
       containers: