Merge pull request #2852 from Shopify/fix-2513

fix custom-error-pages functionality in dynamic mode

internal/ingress/controller/nginx_test.go

@@ -148,8 +148,8 @@ func TestConfigureDynamically(t *testing.T) {
 			t.Errorf("unexpected target reference in JSON content: %v", body)
 		}
 
-		if strings.Contains(body, "service") {
-			t.Errorf("unexpected service reference in JSON content: %v", body)
+		if !strings.Contains(body, "service") {
+			t.Errorf("service reference should be present in JSON content: %v", body)
 		}
 
 	}))

rootfs/etc/nginx/lua/util/dns.lua

@@ -31,11 +31,15 @@ end
 function _M.resolve(host)
   local cached_addresses = cache:get(host)
   if cached_addresses then
-    ngx.log(ngx.INFO, string.format("addresses %s for host %s was resolved from cache", table.concat(cached_addresses, ", "), host))
+    local message = string.format(
+      "addresses %s for host %s was resolved from cache",
+      table.concat(cached_addresses, ", "), host)
+    ngx.log(ngx.INFO, message)
     return cached_addresses
   end
 
-  local r, err = resolver:new{
+  local r
+  r, err = resolver:new{
     nameservers = util.deepcopy(configuration.nameservers),
     retrans = 5,
     timeout = 2000,  -- 2 sec
@@ -46,7 +50,8 @@ function _M.resolve(host)
     return { host }
   end
 
-  local answers, err, _tries = r:query(host, { qtype = r.TYPE_A }, {})
+  local answers
+  answers, err = r:query(host, { qtype = r.TYPE_A }, {})
   if not answers then
     ngx.log(ngx.ERR, "failed to query the DNS server: " .. tostring(err))
     return { host }

rootfs/etc/nginx/template/nginx.tmpl

@@ -673,6 +673,8 @@ stream {
             proxy_set_header       X-Service-Name     $service_name;
             proxy_set_header       X-Service-Port     $service_port;
 
+            set $proxy_upstream_name "upstream-default-backend";
+
             rewrite                (.*) / break;
 
             {{ if $dynamicConfig }}