Add rolling update and template hashing to new nova chart

nova/templates/daemonset-compute.yaml

@@ -8,6 +8,8 @@ spec:
       labels:
         app: nova-compute
       annotations:
+        configmap-bin-hash: {{ tuple "configmap-bin.yaml" . | include "hash" }}
+        configmap-etc-hash: {{ tuple "configmap-etc.yaml" . | include "hash" }}        
         pod.beta.kubernetes.io/init-containers: '[
           {
             "name": "init",

nova/templates/daemonset-libvirt.yaml

@@ -8,6 +8,8 @@ spec:
       labels:
         app: nova-libvirt
       annotations:
+        configmap-bin-hash: {{ tuple "configmap-bin.yaml" . | include "hash" }}
+        configmap-etc-hash: {{ tuple "configmap-etc.yaml" . | include "hash" }}        
         pod.beta.kubernetes.io/init-containers: '[
           {
             "name": "init",

nova/templates/deployment-api-metadata.yaml

@@ -4,11 +4,21 @@ metadata:
   name: nova-api
 spec:
   replicas: {{ .Values.control_replicas }}
+  revisionHistoryLimit: {{ .Values.upgrades.revision_history }}
+  strategy:
+    type: {{ .Values.upgrades.pod_replacement_strategy }}
+    {{ if eq .Values.upgrades.pod_replacement_strategy "RollingUpdate" }}
+    rollingUpdate:
+      maxUnavailable: {{ .Values.upgrades.rolling_update.max_unavailable }}
+      maxSurge: {{ .Values.upgrades.rolling_update.max_surge }}
+    {{ end }}  
   template:
     metadata:
       labels:
         app: nova-api
       annotations:
+        configmap-bin-hash: {{ tuple "configmap-bin.yaml" . | include "hash" }}
+        configmap-etc-hash: {{ tuple "configmap-etc.yaml" . | include "hash" }}        
         pod.beta.kubernetes.io/init-containers: '[
           {
             "name": "init",

nova/templates/deployment-api-osapi.yaml

@@ -4,11 +4,21 @@ metadata:
   name: nova-osapi
 spec:
   replicas: {{ .Values.control_replicas }}
+  revisionHistoryLimit: {{ .Values.upgrades.revision_history }}
+  strategy:
+    type: {{ .Values.upgrades.pod_replacement_strategy }}
+    {{ if eq .Values.upgrades.pod_replacement_strategy "RollingUpdate" }}
+    rollingUpdate:
+      maxUnavailable: {{ .Values.upgrades.rolling_update.max_unavailable }}
+      maxSurge: {{ .Values.upgrades.rolling_update.max_surge }}
+    {{ end }}  
   template:
     metadata:
       labels:
         app: nova-osapi
       annotations:
+        configmap-bin-hash: {{ tuple "configmap-bin.yaml" . | include "hash" }}
+        configmap-etc-hash: {{ tuple "configmap-etc.yaml" . | include "hash" }}        
         pod.beta.kubernetes.io/init-containers: '[
           {
             "name": "init",

nova/templates/deployment-conductor.yaml

@@ -4,11 +4,21 @@ metadata:
   name: nova-conductor
 spec:
   replicas: {{ .Values.control_replicas }}
+  revisionHistoryLimit: {{ .Values.upgrades.revision_history }}
+  strategy:
+    type: {{ .Values.upgrades.pod_replacement_strategy }}
+    {{ if eq .Values.upgrades.pod_replacement_strategy "RollingUpdate" }}
+    rollingUpdate:
+      maxUnavailable: {{ .Values.upgrades.rolling_update.max_unavailable }}
+      maxSurge: {{ .Values.upgrades.rolling_update.max_surge }}
+    {{ end }}  
   template:
     metadata:
       labels:
         app: nova-conductor
       annotations:
+        configmap-bin-hash: {{ tuple "configmap-bin.yaml" . | include "hash" }}
+        configmap-etc-hash: {{ tuple "configmap-etc.yaml" . | include "hash" }}        
         pod.beta.kubernetes.io/init-containers: '[
           {
             "name": "init",

nova/templates/deployment-consoleauth.yaml

@@ -4,11 +4,21 @@ metadata:
   name: nova-consoleauth
 spec:
   replicas: {{ .Values.control_replicas }}
+  revisionHistoryLimit: {{ .Values.upgrades.revision_history }}
+  strategy:
+    type: {{ .Values.upgrades.pod_replacement_strategy }}
+    {{ if eq .Values.upgrades.pod_replacement_strategy "RollingUpdate" }}
+    rollingUpdate:
+      maxUnavailable: {{ .Values.upgrades.rolling_update.max_unavailable }}
+      maxSurge: {{ .Values.upgrades.rolling_update.max_surge }}
+    {{ end }}  
   template:
     metadata:
       labels:
         app: nova-consoleauth
       annotations:
+        configmap-bin-hash: {{ tuple "configmap-bin.yaml" . | include "hash" }}
+        configmap-etc-hash: {{ tuple "configmap-etc.yaml" . | include "hash" }}        
         pod.beta.kubernetes.io/init-containers: '[
           {
             "name": "init",

nova/templates/deployment-scheduler.yaml

@@ -4,11 +4,21 @@ metadata:
   name: nova-scheduler
 spec:
   replicas: {{ .Values.control_replicas }}
+  revisionHistoryLimit: {{ .Values.upgrades.revision_history }}
+  strategy:
+    type: {{ .Values.upgrades.pod_replacement_strategy }}
+    {{ if eq .Values.upgrades.pod_replacement_strategy "RollingUpdate" }}
+    rollingUpdate:
+      maxUnavailable: {{ .Values.upgrades.rolling_update.max_unavailable }}
+      maxSurge: {{ .Values.upgrades.rolling_update.max_surge }}
+    {{ end }}  
   template:
     metadata:
       labels:
         app: nova-scheduler
       annotations:
+        configmap-bin-hash: {{ tuple "configmap-bin.yaml" . | include "hash" }}
+        configmap-etc-hash: {{ tuple "configmap-etc.yaml" . | include "hash" }}        
         pod.beta.kubernetes.io/init-containers: '[
           {
             "name": "init",

nova/values.yaml

@@ -26,6 +26,13 @@ image:
   entrypoint: quay.io/stackanetes/kubernetes-entrypoint:v0.1.0
   pull_policy: "IfNotPresent"
 
+upgrades:
+  revision_history: 3
+  pod_replacement_strategy: RollingUpdate
+  rolling_update:
+    max_unavailable: 1
+    max_surge: 3
+
 network:
   ip_address: "0.0.0.0"
   # TODO(DTadrzak): move external IPs to common, this variable should be shared with