From 00792cd545715fa165333714532d3e8ea6d7d04a Mon Sep 17 00:00:00 2001
From: John Matthews <jwmatthews@gmail.com>
Date: Wed, 26 Apr 2023 06:29:33 -0400
Subject: [PATCH] :sparkles: Support for Amazon Load Balancer Ingress
 controller (#197)

Fixes #184
Fixes #167 (confirmed working with `feature_auth_required: true`)
Relates to #170

These changes allow us to deploy Konveyor onto an Amazon EKS cluster
that uses the Amazon recommended Amazon Load Balancer ingress opposed to
'nginx'.

I deployed the EKS cluster for testing using this newly developed
automation:
https://github.com/konveyor/hack_env_helpers/tree/main/aws/eks

I captured notes while exploring ALB Ingress here for debugging
purposes:
https://gist.github.com/jwmatthews/d492a4944c83dc3f2d016187d53d13b2

---------

Signed-off-by: John Matthews <jwmatthews@gmail.com>
---
 hack/install-tackle.sh                   |  1 +
 roles/tackle/defaults/main.yml           |  6 ++++++
 roles/tackle/tasks/main.yml              |  1 +
 roles/tackle/templates/ingress-ui.yml.j2 | 14 +++++++++++++-
 tools/tackle-opdev.sh                    |  2 +-
 5 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/hack/install-tackle.sh b/hack/install-tackle.sh
index 0711e5f..37dc59a 100755
--- a/hack/install-tackle.sh
+++ b/hack/install-tackle.sh
@@ -66,6 +66,7 @@ spec:
   source: konveyor-tackle
   sourceNamespace: konveyor-tackle
 EOF
+# If on MacOS, need to install `brew install coreutils` to get `timeout`
 timeout 600s bash -c 'until kubectl get customresourcedefinitions.apiextensions.k8s.io tackles.tackle.konveyor.io; do sleep 30; done'
 
 # Create, and wait for, tackle
diff --git a/roles/tackle/defaults/main.yml b/roles/tackle/defaults/main.yml
index 023c6ad..49bfd2a 100644
--- a/roles/tackle/defaults/main.yml
+++ b/roles/tackle/defaults/main.yml
@@ -147,6 +147,8 @@ ui_container_limits_memory: "800Mi"
 ui_container_requests_cpu: "100m"
 ui_container_requests_memory: "350Mi"
 ui_ingress_name: "{{ app_name }}"
+# Ingress class names of "nginx" and "alb" are expected
+ui_ingress_class_name: "nginx"
 ui_ingress_proxy_body_size: "500m"
 ui_route_name: "{{ app_name }}"
 ui_tls_enabled: false
@@ -156,6 +158,10 @@ ui_proto: "{{ 'https' if ui_tls_enabled | bool else 'http' }}"
 ui_node_extra_ca_certs: "/opt/app-root/src/ca.crt"
 ui_route_tls_termination: "edge"
 ui_route_tls_insecure_termination_policy: "Redirect"
+# ui_ingress_path_type should only be defined if you need to override
+# the default value for the ingress controller you are using
+# ui_ingress_path_type: 
+
 
 oauth_provider: openshift
 oauth_default_openshift_sar: --openshift-sar={"namespace":"{{ app_namespace }}","resource":"services","resourceName":"{{ ui_service_name }}","verb":"get"}
diff --git a/roles/tackle/tasks/main.yml b/roles/tackle/tasks/main.yml
index f695d45..2253e3f 100644
--- a/roles/tackle/tasks/main.yml
+++ b/roles/tackle/tasks/main.yml
@@ -427,6 +427,7 @@
   k8s:
     state: present
     definition: "{{ lookup('template', 'ingress-ui.yml.j2') }}"
+    merge_type: merge
   when: not openshift_cluster|bool
 
 - name: "Setup UI Route"
diff --git a/roles/tackle/templates/ingress-ui.yml.j2 b/roles/tackle/templates/ingress-ui.yml.j2
index 0904a88..35d5caf 100644
--- a/roles/tackle/templates/ingress-ui.yml.j2
+++ b/roles/tackle/templates/ingress-ui.yml.j2
@@ -3,7 +3,12 @@ apiVersion: networking.k8s.io/v1
 kind: Ingress
 metadata:
   annotations:
+{% if ui_ingress_class_name == 'nginx' %}
     nginx.ingress.kubernetes.io/proxy-body-size: {{ ui_ingress_proxy_body_size }}
+{% elif ui_ingress_class_name == 'alb' %}
+    alb.ingress.kubernetes.io/target-type: ip
+    alb.ingress.kubernetes.io/scheme: internet-facing
+{% endif %}
   name: {{ ui_ingress_name }}
   namespace: {{ app_namespace }}
   labels:
@@ -12,14 +17,21 @@ metadata:
     app.kubernetes.io/part-of: {{ app_name }}
     app: {{ app_name }}
 spec:
-  ingressClassName: nginx
+  ingressClassName: {{ ui_ingress_class_name }}
+  
   tls:
     - {}
   rules:
     - http:
         paths:
           - path: /
+{% if ui_ingress_path_type is defined %}
+            pathType: {{ ui_ingress_path_type }}
+{% elif ui_ingress_class_name == 'alb' %}
+            pathType: Prefix
+{% else %}
             pathType: ImplementationSpecific
+{% endif %} 
             backend:
               service:
                 name: {{ ui_service_name }}
diff --git a/tools/tackle-opdev.sh b/tools/tackle-opdev.sh
index 4c2af1e..2706e0e 100755
--- a/tools/tackle-opdev.sh
+++ b/tools/tackle-opdev.sh
@@ -13,7 +13,7 @@ INDEX_REPO="tackle2-operator-index"
 CATALOG_NS="konveyor-tackle"
 PROJECT_NS="konveyor-tackle"
 TAG="latest"
-NAME="Tackle"
+NAME="Konveyor"
 
 
 function usage () {