fix: Install Istio using Marketplace

fixes: 206

istio/ingress.yaml

@@ -0,0 +1,18 @@
+---
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: istio-ingressgateway-ingress
+  namespace: istio-system
+spec:
+  rules:
+  - host: istio.$CLUSTER_ID.k8s.civo.com
+    http:
+      paths:
+      - path: /
+        pathType: Prefix
+        backend:
+          service:
+            name: istio-ingressgateway
+            port:
+              number: 80

istio/install.sh

@@ -0,0 +1,31 @@
+#!/bin/bash
+
+set -eu 
+set -o pipefail 
+
+ISTIO_NS=istio-system
+
+if [ "$ISTIO_VERSION" == "latest" ];
+then
+  ISTIO_VERSION=$(curl -sSL https://api.github.com/repos/istio/istio/releases/latest | grep '"tag_name":' | sed -E 's/.*"([^"]+)".*/\1/')
+  echo "Downloading latest Istio: v$ISTIO_VERSION"
+  curl -L https://istio.io/downloadIstio | sh -
+else
+  echo "Downloading Istio: v$ISTIO_VERSION"
+  curl -L https://istio.io/downloadIstio | ISTIO_VERSION=$ISTIO_VERSION sh -
+fi
+
+# TODO enable this once we are able to get the ISTIO_VERSION in sh
+#curl -L https://istio.io/downloadIstio | ISTIO_VERSION=1.10.0 sh -
+
+ISTIO_DIR=$(find . -name istio*)
+export PATH=$ISTIO_DIR/bin:$PATH
+
+# # Run prechecks
+istioctl x precheck
+
+# # Install Istio Demo Profile
+istioctl install --set profile=demo -y
+
+# Create the Ingress Gateway for istio-ingressgateway
+kubectl apply -n $ISTIO_NS https://raw.githubusercontent.com/civo/kubernetes-marketplace/master/istio/ingress.yaml

istio/manifest.yaml

@@ -0,0 +1,21 @@
+---
+name: istio
+title: "Istio Service Mesh"
+version: "1.10.0"
+maintainer: kamesh.sampath@hotmail.com
+description: Simplify observability, traffic management, security, and policy with the leading service mesh.
+url: https://istio.io/latest/
+category: architecture
+plans:
+  - label: "Istio Latest"
+    configuration:
+      ISTIO_VERSION:
+        value: latest
+  - label: "Istio v1.10.0"
+    configuration:
+      ISTIO_VERSION:
+        value: 1.10.0
+configuration:  
+  CLUSTER_ID:
+    label: "Cluster ID"
+    value: "CIVO:CLUSTER_ID"

istio/post_install.md

@@ -0,0 +1,76 @@
+## The Istio service mesh
+
+[Istio](https://istio.io)  addresses the challenges developers and operators face with a distributed or microservices architecture. Whether you're building from scratch or migrating existing applications to cloud native, Istio can help.
+
+### Install istioctl
+
+Download and Install latest `istioctl` in your local machine:
+
+```shell
+curl -L https://istio.io/downloadIstio | sh -
+ISTIO_DIR=$(find . -name istio*)
+export PATH=$ISTIO_DIR/bin:$PATH
+cd $ISTIO_DIR
+```
+
+### Get started
+
+### Access Istio Ingress Gateway
+
+The installation creates an *Ingress* for the `istio-ingressgateway`. You can use that to access the Istio service mesh applications.
+
+Run the following command to get Istio Ingress Gateway URL:
+
+```shell
+export ISTIO_GATEWAY_URL=$(kubectl get ing -n istio-system istio-ingressgateway-ingress -o=jsonpath='{.spec.rules[0].host}')
+curl -I $ISTIO_GATEWAY_URL 
+```
+
+The command should show an output with HTTP 502, as currently no application is part of the Istio Service mesh.
+
+```text
+HTTP/1.1 502 Bad Gateway
+Vary: Accept-Encoding
+Date: Wed, 26 May 2021 12:39:35 GMT
+Content-Length: 11
+Content-Type: text/plain; charset=utf-8
+```
+
+Label the `default` namespace for Istio automatic sidecar injection:
+
+```shell
+kubectl label namespace default istio-injection=enabled
+```
+
+Now deploy [Deploy Bookinfo Application](https://istio.io/latest/docs/setup/getting-started/#bookinfo)
+
+Once successfully deployed, [expose the application](https://istio.io/latest/docs/setup/getting-started/#bookinfo) to outside world
+
+After you have exposed the application to outside world, try accessing it using the `$GATEWAY_URL`
+
+```shell
+curl -I $ISTIO_GATEWAY_URL/productpage
+```
+The curl should return you an HTTP 200
+
+```text
+HTTP/1.1 200 OK
+Content-Length: 5179
+Content-Type: text/html; charset=utf-8
+Date: Wed, 26 May 2021 12:47:06 GMT
+Server: istio-envoy
+Vary: Accept-Encoding
+X-Envoy-Upstream-Service-Time: 1029
+```
+
+(OR)
+
+Opening the following url in the web browser should show you the sample book application landing page:
+
+```shell
+open "http://$ISTIO_GATEWAY_URL/productpage"
+```
+
+### Documentation
+
+[Istio Documentation](https://istio.io/latest/docs/)

istio/uninstall.sh

@@ -0,0 +1,26 @@
+#!/bin/bash
+
+set -eu 
+set -o pipefail 
+
+ISTIO_NS=istio-system
+
+if [ "$ISTIO_VERSION" == "latest" ];
+then
+  unset ISTIO_VERSION
+  curl -L https://istio.io/downloadIstio | sh -
+else
+  curl -L https://istio.io/downloadIstio | ISTIO_VERSION=$ISTIO_VERSION sh -
+fi
+
+ISTIO_DIR=$(find . -name istio*)
+export PATH=$ISTIO_DIR/bin:$PATH
+
+kubectl config set-context --current --namespace=$ISTIO_NS
+
+# Delete Istio
+istioctl manifest generate --set profile=demo |\
+   kubectl delete  -n$ISTIO_NS --ignore-not-found=true -f -
+
+# Set context namespace back to "default"
+kubectl config set-context --current --namespace=default