Add HAProxy as internal loadbalancer (#4480)

roles/download/defaults/main.yml

@@ -202,6 +202,9 @@ multus_image_tag: "{{ multus_version }}"
 nginx_image_repo: nginx
 nginx_image_tag: 1.15
 
+haproxy_image_repo: haproxy
+haproxy_image_tag: 1.9
+
 coredns_version: "1.4.0"
 coredns_image_repo: "coredns/coredns"
 coredns_image_tag: "{{ coredns_version }}"
@@ -485,7 +488,7 @@ downloads:
       - k8s-cluster
 
   nginx:
-    enabled: "{{ loadbalancer_apiserver_localhost }}"
+    enabled: "{{ loadbalancer_apiserver_localhost and loadbalancer_apiserver_type == 'nginx' }}"
     container: true
     repo: "{{ nginx_image_repo }}"
     tag: "{{ nginx_image_tag }}"
@@ -493,6 +496,15 @@ downloads:
     groups:
       - kube-node
 
+  haproxy:
+    enabled: "{{ loadbalancer_apiserver_localhost and loadbalancer_apiserver_type == 'haproxy' }}"
+    container: true
+    repo: "{{ haproxy_image_repo }}"
+    tag: "{{ haproxy_image_tag }}"
+    sha256: "{{ haproxy_digest_checksum|default(None) }}"
+    groups:
+      - kube-node
+
   coredns:
     enabled: "{{ dns_mode in ['coredns', 'coredns_dual'] }}"
     container: true