# Helm upgrade extensions/v1beta1

- Helm version: 3.2
- Kubernetes version: 1.15
- Chart repository: [e-mail]:masmovil/charts.git
- Chart path: base
- Cluster used: mm-k8s-dev-01
- Namespace used: "test"
- Branch with changes: task/devops-573-upgrade-api-version

## 1. Install base helm chart
Install from `master` branch:

git checkout master
helm3.2 install test-upgrade . --values values.test.yaml

Output:

NAME: test-upgrade
LAST DEPLOYED: Mon May  4 12:28:10 2020
NAMESPACE: test
STATUS: deployed
REVISION: 1
TEST SUITE: None
NOTES:
Application deployed into namespace
test

Get the application running in the following URLs:
  - https://test.private.dev-01.k8s.masmovil.com

You can check the pods running
kubectl -n test get pods

## 2. Upgrade to apps/v1

Preview changes:

git checkout task/devops-573-upgrade-api-version
helm3.2 diff upgrade test-upgrade . --values values.test.yaml

Output:

test, base-nginx-test, Deployment (extensions) has been removed:
- # Source: base/templates/deployment.yaml
- apiVersion: extensions/v1beta1
- kind: Deployment
- metadata:
-   name: base-nginx-test
-   labels:
-     app: base-nginx-test
-     fullapp: test
-     chart: base
-     release: test-upgrade
-     heritage: Helm
-     tier: backend
- spec:
-   selector:
-     matchLabels:
-       app: base-nginx-test
-       fullapp: test
-   replicas: 1
-   template:
-     metadata:
-       annotations:
-
-         {}
-       labels:
-         app: base-nginx-test
-         fullapp: test
-         release: test-upgrade
-         tier: backend
-     spec:
-       affinity:
-         nodeAffinity:
-           preferredDuringSchedulingIgnoredDuringExecution:
-           - preference:
-               matchExpressions:
-               - key: k8s.masmovil.com/preemptible
-                 operator: In
-                 values:
-                 - "true"
-             weight: 100
-         podAntiAffinity:
-           preferredDuringSchedulingIgnoredDuringExecution:
-           - podAffinityTerm:
-               labelSelector:
-                 matchExpressions:
-                 - key: app
-                   operator: In
-                   values:
-                   - base-nginx-test
-               topologyKey: kubernetes.io/hostname
-             weight: 100
-       volumes:
-       - name: app-config
-         configMap:
-           name: base-nginx-test-config
-
-
-       containers:
-         - name: "base-nginx-test"
-           image: "nginx:1.17.8-alpine"
-           imagePullPolicy: IfNotPresent
-           command:
-
-           - nginx
-           - -g
-           - daemon off;
-           env:
-           - name: CONFIG_PATH
-             value: /etc/nginx/conf.d
-           ports:
-             - containerPort: 8080
-               name: http
-               protocol: TCP
-
-
-           livenessProbe:
-
-             failureThreshold: 3
-             httpGet:
-               httpHeaders:
-               - name: customer-session-id
-                 value: k8s-liveness-probe
-               path: /health
-               port: 8080
-             initialDelaySeconds: 30
-             periodSeconds: 10
-             successThreshold: 1
-             timeoutSeconds: 3
-           readinessProbe:
-
-             failureThreshold: 1
-             httpGet:
-               httpHeaders:
-               - name: customer-session-id
-                 value: k8s-liveness-probe
-               path: /health
-               port: 8080
-             initialDelaySeconds: 10
-             periodSeconds: 5
-             successThreshold: 1
-             timeoutSeconds: 3
-           volumeMounts:
-           - name: app-config
-             mountPath: /etc/nginx/conf.d
-           resources:
-
-             limits:
-               cpu: 300m
-               memory: 150Mi
-             requests:
-               cpu: 20m
-               memory: 20Mi
+
test, base-nginx-test, Deployment (apps) has been added:
-
+ # Source: base/templates/deployment.yaml
+ apiVersion: apps/v1
+ kind: Deployment
+ metadata:
+   name: base-nginx-test
+   labels:
+     app: base-nginx-test
+     fullapp: test
+     chart: base
+     release: test-upgrade
+     heritage: Helm
+     tier: backend
+ spec:
+   selector:
+     matchLabels:
+       app: base-nginx-test
+       fullapp: test
+   replicas: 1
+   template:
+     metadata:
+       annotations:
+
+         {}
+       labels:
+         app: base-nginx-test
+         fullapp: test
+         release: test-upgrade
+         tier: backend
+     spec:
+       affinity:
+         nodeAffinity:
+           preferredDuringSchedulingIgnoredDuringExecution:
+           - preference:
+               matchExpressions:
+               - key: k8s.masmovil.com/preemptible
+                 operator: In
+                 values:
+                 - "true"
+             weight: 100
+         podAntiAffinity:
+           preferredDuringSchedulingIgnoredDuringExecution:
+           - podAffinityTerm:
+               labelSelector:
+                 matchExpressions:
+                 - key: app
+                   operator: In
+                   values:
+                   - base-nginx-test
+               topologyKey: kubernetes.io/hostname
+             weight: 100
+       volumes:
+       - name: app-config
+         configMap:
+           name: base-nginx-test-config
+
+
+       containers:
+         - name: "base-nginx-test"
+           image: "nginx:1.17.8-alpine"
+           imagePullPolicy: IfNotPresent
+           command:
+
+           - nginx
+           - -g
+           - daemon off;
+           env:
+           - name: CONFIG_PATH
+             value: /etc/nginx/conf.d
+           ports:
+             - containerPort: 8080
+               name: http
+               protocol: TCP
+
+
+           livenessProbe:
+
+             failureThreshold: 3
+             httpGet:
+               httpHeaders:
+               - name: customer-session-id
+                 value: k8s-liveness-probe
+               path: /health
+               port: 8080
+             initialDelaySeconds: 30
+             periodSeconds: 10
+             successThreshold: 1
+             timeoutSeconds: 3
+           readinessProbe:
+
+             failureThreshold: 1
+             httpGet:
+               httpHeaders:
+               - name: customer-session-id
+                 value: k8s-liveness-probe
+               path: /health
+               port: 8080
+             initialDelaySeconds: 10
+             periodSeconds: 5
+             successThreshold: 1
+             timeoutSeconds: 3
+           volumeMounts:
+           - name: app-config
+             mountPath: /etc/nginx/conf.d
+           resources:
+
+             limits:
+               cpu: 300m
+               memory: 150Mi
+             requests:
+               cpu: 20m
+               memory: 20Mi

List releases:

helm list
NAME        	NAMESPACE	REVISION	UPDATED                              	STATUS  	CHART      	APP VERSION
test-upgrade	test     	1       	2020-05-04 12:28:10.529788 +0200 CEST	deployed	base-v1.3.0

Apply changes:

helm3.2 upgrade test-upgrade . --values values.test.yaml

Output:

Release "test-upgrade" has been upgraded. Happy Helming!
NAME: test-upgrade
LAST DEPLOYED: Mon May  4 12:37:48 2020
NAMESPACE: test
STATUS: deployed
REVISION: 2
TEST SUITE: None
NOTES:
Application deployed into namespace
test

Get the application running in the following URLs:
  - https://test.private.dev-01.k8s.masmovil.com

You can check the pods running
kubectl -n test get pods

List releases:

helm list
NAME        	NAMESPACE	REVISION	UPDATED                              	STATUS  	CHART      	APP VERSION
test-upgrade	test     	2       	2020-05-04 12:37:48.338596 +0200 CEST	deployed	base-v1.3.1

**Note**: I have checked PODs and it did not delete the deployment and created it again, PODs are still up and running with no downtime.

## 3. Check depployment

We check if deployment is being server in new `apps/v1` version:

k get deploy base-nginx-test -o yaml |grep apiVersion
apiVersion: extensions/v1beta1

It is still in `extensions/v1beta1`, we should check what happens in these 2 scenarios:

1. We keep installing helm releases upgrades.
2. We upgrade cluster to v1.16