Fix Nginx lb in k8s/istio

- Provide workaround to make nginx lb work properly
- nginx_client sample can modify default load balancing
from three to two servers at runtime
- Ensure port 9180 is used for default deploy for lb and
servers
- Modify render_yaml to specify deploy_name so that
clover-server1, 2, 3 can be used for default lb config
- Ensure proxy template is aligned to lb to allow the
source IP from originating host to be propagated to final
destination

- Fix default nginx proxy server_name to 'proxy-access-control'
and change default proxy destination to 'http-lb'
- Split lb service_type to 'lbv1' and 'lbv2' to provide an example
of how to modify the run-time configuration of the load balancer
after deployment - modify http-lb-v2 to use clover-server4/5 instead
of the defualt clover-server1/2/3 - modify http-lb-v1 to use
clover-server1/2 instead of 1/2/3
- Aligned pod IP retrival method with nginx_client.py

Change-Id: I73fa60a69c93ae1e82a477ef6283c00f67a21360
Signed-off-by: Eddie Arrage <eddie.arrage@huawei.com>

1 files changed, 14 insertions, 1 deletions

diff --git a/samples/services/nginx/docker/grpc/templates/lb.template b/samples/services/nginx/docker/grpc/templates/lb.template
index 4866408..37de1af 100644
--- a/samples/services/nginx/docker/grpc/templates/lb.template
+++ b/samples/services/nginx/docker/grpc/templates/lb.template
@@ -61,10 +61,20 @@ http {
 
     upstream {{ slb_group }} {
         {%- for item in slb_list %}
-            server {{ item }};
+            server 127.0.0.1:800{{ loop.index }};
         {%- endfor %}
     }
 
+    {%- for item in slb_list %}
+    server {
+        listen 800{{ loop.index }};
+        location / {
+           proxy_http_version 1.1;
+           proxy_pass http://{{ item }};
+        }
+    }
+    {%- endfor %}
+
     server {
         listen {{ server_port }};
         server_name {{ server_name }};
@@ -73,6 +83,9 @@ http {
             proxy_http_version 1.1;
             proxy_set_header Upgrade $http_upgrade;
             proxy_set_header Connection "upgrade";
+            proxy_set_header X-Forwarded-For $remote_addr;
+            proxy_set_header X-Forwarded-Proto http;
+            proxy_set_header X-Real-IP $remote_addr;
             proxy_pass http://{{ slb_group }};
         }