Add CustomHTTPErrors directive

internal/ingress/controller/template/crossplane/crossplane_test.go

@@ -186,6 +186,8 @@ func TestCrossplaneTemplate(t *testing.T) {
 		tplConfig.Cfg.UpstreamKeepaliveTimeout = 200
 		tplConfig.Cfg.UpstreamKeepaliveRequests = 15
 
+		tplConfig.Cfg.CustomHTTPErrors = []int{400, 404, 501}
+
 		tpl = crossplane.NewTemplate()
 		tpl.SetMimeFile(mimeFile.Name())
 		content, err := tpl.Write(tplConfig)

internal/ingress/controller/template/crossplane/http.go

@@ -284,6 +284,11 @@ func (c *Template) buildHTTP() {
 		httpBlock = append(httpBlock, buildMapDirective("$http_referer", "$block_ref", refDirectives))
 	}
 
+	for _, v := range cfg.CustomHTTPErrors {
+		httpBlock = append(httpBlock, buildDirective("error_page", v,
+			fmt.Sprintf("@custom_upstream-default-backend_%d", v)))
+	}
+
 	c.config.Parsed = append(c.config.Parsed, &ngx_crossplane.Directive{
 		Directive: "http",
 		Block:     httpBlock,

internal/ingress/controller/template/crossplane/testdata/nginx.tmpl

@@ -407,6 +407,7 @@ http {
         default "$";
     }
 
+    # MIGRATED
     {{ range $errCode := $cfg.CustomHTTPErrors }}
     error_page {{ $errCode }} = @custom_upstream-default-backend_{{ $errCode }};{{ end }}