🔧(helm) force SATOSA pods to run on Redis's node

For now it seems we're having trouble when the app pods are not sharing
a node with the Redis server.

src/helm/env.d/dev/values.oidc2fer.yaml.gotmpl

@@ -4,7 +4,17 @@ image:
   tag: "latest"
 
 satosa:
-  replicas: 1
+  replicas: 2
+  affinity:
+    podAffinity:
+      requiredDuringSchedulingIgnoredDuringExecution:
+      - labelSelector:
+          matchExpressions:
+          - key: app.kubernetes.io/name
+            operator: In
+            values:
+            - redis
+        topologyKey: kubernetes.io/hostname
   envVars:
     BASE_URL: https://oidc2fer.127.0.0.1.nip.io
     GUNICORN_CMD_ARGS: --workers=3
@@ -41,6 +51,7 @@ satosa:
           "https://test-idp.federation.renater.fr/idp/shibboleth": "12345678200010"
       }
 
+
 ingress:
   enabled: true
   host: oidc2fer.127.0.0.1.nip.io

src/helm/env.d/outscale-production/values.oidc2fer.yaml.gotmpl

@@ -4,7 +4,17 @@ image:
   tag: "v1.0.12"
 
 satosa:
-  replicas: 8
+  replicas: 2
+  affinity:
+    podAffinity:
+      requiredDuringSchedulingIgnoredDuringExecution:
+      - labelSelector:
+          matchExpressions:
+          - key: statefulset.kubernetes.io/pod-name
+            operator: In
+            values:
+            - redis--re-0
+        topologyKey: kubernetes.io/hostname
   envVars:
     BASE_URL: https://renater.agentconnect.gouv.fr
     GUNICORN_CMD_ARGS: --workers=3 --timeout=10

src/helm/env.d/staging/values.oidc2fer.yaml.gotmpl

@@ -5,6 +5,16 @@ image:
 
 satosa:
   replicas: 2
+  affinity:
+    podAffinity:
+      requiredDuringSchedulingIgnoredDuringExecution:
+      - labelSelector:
+          matchExpressions:
+          - key: statefulset.kubernetes.io/pod-name
+            operator: In
+            values:
+            - redis--re-0
+        topologyKey: kubernetes.io/hostname
   envVars:
     BASE_URL: https://oidc2fer-staging.beta.numerique.gouv.fr
     GUNICORN_CMD_ARGS: --workers=3