Add main snippets to allow Main context customization

examples/customization/README.md

@@ -32,6 +32,7 @@ The table below summarizes some of the options. More options (extensions) are av
 | N/A | `real-ip-header` | Sets the value of the [real_ip_header](http://nginx.org/en/docs/http/ngx_http_realip_module.html#real_ip_header) directive. | `X-Real-IP`|
 | N/A | `real-ip-recursive` | Enables or disables the [real_ip_recursive](http://nginx.org/en/docs/http/ngx_http_realip_module.html#real_ip_recursive) directive. | `False`|
 | `nginx.org/server-tokens` | `server-tokens` | Enables or disables the [server_tokens](http://nginx.org/en/docs/http/ngx_http_core_module.html#server_tokens) directive. Additionally, with the NGINX Plus, you can specify a custom string value, including the empty string value, which disables the emission of the “Server” field. | `True`|
+| N/A | `main-snippets` | Sets a custom snippet in main context. | N/A |
 | N/A | `http-snippets` | Sets a custom snippet in http context. | N/A |
 | `nginx.org/location-snippets` | `location-snippets` | Sets a custom snippet in location context. | N/A |
 | `nginx.org/server-snippets` | `server-snippets` | Sets a custom snippet in server context. | N/A |

examples/customization/nginx-config.yaml

@@ -32,6 +32,9 @@ data:
   real-ip-header: "proxy_protocol" # default is X-Real-IP. Sets the value of the real_ip_header directive. http://nginx.org/en/docs/http/ngx_http_realip_module.html#real_ip_header
   real-ip-recursive: "True" # default is "False". Enables or disables the real_ip_recursive directive. See http://nginx.org/en/docs/http/ngx_http_realip_module.html#real_ip_recursive
   server-tokens: "False" # default is "True". Enables or disables the server_tokens directive. See http://nginx.org/en/docs/http/ngx_http_core_module.html#server_tokens
+  main-snippets: | # No default. Pipe is used for multiple line snippets.
+    load_module "modules/ngx_http_geoip_module.so";
+    load_module "modules/ngx_stream_module.so";
   http-snippets: | # Pipe is used for multiple line snippets. Make sure the snippet is not a default value, in order to avoid duplication.
     map $uri $new_uri {
       /old.html /index.html;

nginx-controller/controller/controller.go

@@ -554,6 +554,13 @@ func (lbc *LoadBalancerController) syncCfgm(task Task) {
 			cfg.ProxyMaxTempFileSize = proxyMaxTempFileSize
 		}
 
+                if mainMainSnippets, exists, err := nginx.GetMapKeyAsStringSlice(cfgm.Data, "main-snippets", cfgm, "\n"); exists {
+                        if err != nil {
+                                glog.Error(err)
+                        } else {
+                                cfg.MainMainSnippets = mainMainSnippets
+                        }
+                }
 		if mainHTTPSnippets, exists, err := nginx.GetMapKeyAsStringSlice(cfgm.Data, "http-snippets", cfgm, "\n"); exists {
 			if err != nil {
 				glog.Error(err)

nginx-controller/nginx/config.go

@@ -11,6 +11,7 @@ type Config struct {
 	HTTP2                         bool
 	RedirectToHTTPS               bool
 	SSLRedirect                   bool
+	MainMainSnippets              []string
 	MainHTTPSnippets              []string
 	MainServerNamesHashBucketSize string
 	MainServerNamesHashMaxSize    string

nginx-controller/nginx/configurator.go

@@ -694,6 +694,7 @@ func (cnf *Configurator) updatePlusEndpoints(ingEx *IngressEx) error {
 func (cnf *Configurator) UpdateConfig(config *Config, ingExes []*IngressEx) error {
 	cnf.config = config
 	mainCfg := &NginxMainConfig{
+		MainSnippets:              config.MainMainSnippets,
 		HTTPSnippets:              config.MainHTTPSnippets,
 		ServerNamesHashBucketSize: config.MainServerNamesHashBucketSize,
 		ServerNamesHashMaxSize:    config.MainServerNamesHashMaxSize,

nginx-controller/nginx/nginx.go

@@ -106,6 +106,7 @@ type NginxMainConfig struct {
 	ServerNamesHashMaxSize    string
 	LogFormat                 string
 	HealthStatus              bool
+	MainSnippets              []string
 	HTTPSnippets              []string
 	// http://nginx.org/en/docs/http/ngx_http_ssl_module.html
 	SSLProtocols           string

nginx-controller/nginx/templates/nginx-plus.tmpl

@@ -11,6 +11,10 @@ daemon off;
 error_log  /var/log/nginx/error.log notice;
 pid        /var/run/nginx.pid;
 
+{{- if .MainSnippets}}
+{{range $value := .MainSnippets}}
+{{$value}}{{end}}
+{{- end}}
 
 events {
     worker_connections  1024;

nginx-controller/nginx/templates/nginx.tmpl

@@ -10,6 +10,10 @@ daemon off;
 error_log  /var/log/nginx/error.log warn;
 pid        /var/run/nginx.pid;
 
+{{- if .MainSnippets}}
+{{range $value := .MainSnippets}}
+{{$value}}{{end}}
+{{- end}}
 
 events {
     worker_connections  1024;