From 4e16dc19a26b4f17822f9c85509e084b1e974c35 Mon Sep 17 00:00:00 2001
From: odubajDT <93584209+odubajDT@users.noreply.github.com>
Date: Tue, 18 Jan 2022 13:36:45 +0100
Subject: [PATCH] fix: Deprecate Kubernetes versions under v1.19 + support
 Openshift 3.11 (#222)

Signed-off-by: odubajDT <ondrej.dubaj@dynatrace.com>
---
 istio-configuration/configure-istio.sh | 26 ++++++++++++++++++++++++++
 quickstart/expose-keptn.sh             | 25 +++++++++++++++++++++++++
 quickstart/multistage-delivery.sh      | 24 ++++++++++++++++++++++++
 3 files changed, 75 insertions(+)

diff --git a/istio-configuration/configure-istio.sh b/istio-configuration/configure-istio.sh
index cfe9bd2..a3185f1 100755
--- a/istio-configuration/configure-istio.sh
+++ b/istio-configuration/configure-istio.sh
@@ -17,6 +17,31 @@ fi
 
 echo "External IP for istio-ingressgateway is ${INGRESS_IP}, creating configmaps..."
 
+K8S_VERSION=$(kubectl version -ojson)
+K8S_VERSION_MINOR=$(echo "$K8S_VERSION" | jq -r .serverVersion.minor)
+
+if [[ "$K8S_VERSION_MINOR" < "19" ]]
+then
+echo "Detected Kubernetes version < 1.19"
+# Applying ingress-manifest
+kubectl apply -f - <<EOF
+apiVersion: networking.k8s.io/v1beta1
+kind: Ingress
+metadata:
+  annotations:
+    kubernetes.io/ingress.class: istio
+  name: api-keptn-ingress
+  namespace: keptn
+spec:
+  rules:
+  - host: $INGRESS_IP.nip.io
+    http:
+      paths:
+      - backend:
+          serviceName: api-gateway-nginx
+          servicePort: 80
+EOF
+else
 # Applying ingress-manifest
 kubectl apply -f - <<EOF
 apiVersion: networking.k8s.io/v1
@@ -39,6 +64,7 @@ spec:
             port:
               number: 80
 EOF
+fi
 
 # Applying public gateway
 kubectl apply -f - <<EOF
diff --git a/quickstart/expose-keptn.sh b/quickstart/expose-keptn.sh
index 1bcc011..5f63ef4 100755
--- a/quickstart/expose-keptn.sh
+++ b/quickstart/expose-keptn.sh
@@ -72,6 +72,30 @@ SLEEP_TIME=5
 
 print_headline "Configuring Ingress for your local installation"
 
+K8S_VERSION=$(kubectl version -ojson)
+K8S_VERSION_MINOR=$(echo "$K8S_VERSION" | jq -r .serverVersion.minor)
+
+if [[ "$K8S_VERSION_MINOR" < "19" ]]
+then
+echo "Detected Kubernetes version < 1.19"
+# Applying ingress-manifest
+kubectl apply -f - <<EOF
+apiVersion: networking.k8s.io/v1beta1
+kind: Ingress
+metadata:
+  name: api-keptn-ingress
+  namespace: keptn
+  annotations:
+    ingress.kubernetes.io/ssl-redirect: "false"
+spec:
+  rules:
+  - http:
+      paths:
+      - backend:
+          serviceName: api-gateway-nginx
+          servicePort: 80
+EOF
+else
 # Applying ingress-manifest
 kubectl apply -f - <<EOF
 apiVersion: networking.k8s.io/v1
@@ -93,6 +117,7 @@ spec:
             port:
               number: 80
 EOF
+fi
 
 verify_test_step $? "Applying public gateway failed"
 
diff --git a/quickstart/multistage-delivery.sh b/quickstart/multistage-delivery.sh
index 0f8f760..087838b 100755
--- a/quickstart/multistage-delivery.sh
+++ b/quickstart/multistage-delivery.sh
@@ -136,6 +136,29 @@ helm install prometheus prometheus-community/prometheus --namespace monitoring -
 
 verify_test_step $? "Install prometheus failed"
 
+K8S_VERSION=$(kubectl version -ojson)
+K8S_VERSION_MINOR=$(echo "$K8S_VERSION" | jq -r .serverVersion.minor)
+
+if [[ "$K8S_VERSION_MINOR" < "19" ]]
+then
+echo "Detected Kubernetes version < 1.19"
+# Applying ingress-manifest
+kubectl apply -f - <<EOF
+apiVersion: networking.k8s.io/v1beta1
+kind: Ingress
+metadata:
+  name: prometheus-ingress
+  namespace: monitoring
+spec:
+  rules:
+  - host: prometheus.$INGRESS_IP.nip.io
+    http:
+      paths:
+      - backend:
+          serviceName: prometheus-server
+          servicePort: 80
+EOF
+else
 kubectl apply -f - <<EOF
 apiVersion: networking.k8s.io/v1
 kind: Ingress
@@ -155,6 +178,7 @@ spec:
             port:
               number: 80
 EOF
+fi
 
 verify_test_step $? "Applying Ingress for Prometheus failed"