Deprecate and remove AJP support

docs/e2e-tests.md

@@ -109,7 +109,6 @@ Do not try to edit it manually.
 - [should set backend protocol to grpc:// and use grpc_pass](https://github.com/kubernetes/ingress-nginx/tree/main/test/e2e/annotations/backendprotocol.go#L64)
 - [should set backend protocol to grpcs:// and use grpc_pass](https://github.com/kubernetes/ingress-nginx/tree/main/test/e2e/annotations/backendprotocol.go#L79)
 - [should set backend protocol to '' and use fastcgi_pass](https://github.com/kubernetes/ingress-nginx/tree/main/test/e2e/annotations/backendprotocol.go#L94)
-- [should set backend protocol to '' and use ajp_pass](https://github.com/kubernetes/ingress-nginx/tree/main/test/e2e/annotations/backendprotocol.go#L109)
 
 ### [canary-*](https://github.com/kubernetes/ingress-nginx/tree/main/test/e2e/annotations/canary.go#L36)
 

docs/user-guide/nginx-configuration/annotations.md

@@ -38,7 +38,7 @@ You can add these Kubernetes annotations to specific Ingress objects to customiz
 |[nginx.ingress.kubernetes.io/auth-proxy-set-headers](#external-authentication)|string|
 |[nginx.ingress.kubernetes.io/auth-snippet](#external-authentication)|string|
 |[nginx.ingress.kubernetes.io/enable-global-auth](#external-authentication)|"true" or "false"|
-|[nginx.ingress.kubernetes.io/backend-protocol](#backend-protocol)|string|HTTP,HTTPS,GRPC,GRPCS,AJP|
+|[nginx.ingress.kubernetes.io/backend-protocol](#backend-protocol)|string|HTTP,HTTPS,GRPC,GRPCS|
 |[nginx.ingress.kubernetes.io/canary](#canary)|"true" or "false"|
 |[nginx.ingress.kubernetes.io/canary-by-header](#canary)|string|
 |[nginx.ingress.kubernetes.io/canary-by-header-value](#canary)|string|
@@ -894,7 +894,7 @@ Include /etc/nginx/owasp-modsecurity-crs/nginx-modsecurity.conf
 ### Backend Protocol
 
 Using `backend-protocol` annotations is possible to indicate how NGINX should communicate with the backend service. (Replaces `secure-backends` in older versions)
-Valid Values: HTTP, HTTPS, GRPC, GRPCS, AJP and FCGI
+Valid Values: HTTP, HTTPS, GRPC, GRPCS and FCGI
 
 By default NGINX uses `HTTP`.
 

images/nginx/rootfs/build.sh

@@ -80,11 +80,6 @@ export LUA_CJSON_VERSION=2.1.0.10
 # Check for recent changes: https://github.com/leev/ngx_http_geoip2_module/compare/3.3...master
 export GEOIP2_VERSION=a26c6beed77e81553686852dceb6c7fdacc5970d
 
-# Check for recent changes: https://github.com/msva/nginx_ajp_module/compare/fcbb2ccca4901d317ecd7a9dabb3fec9378ff40f...master
-# This is a fork from https://github.com/yaoweibin/nginx_ajp_module
-# Since it has not been updated and is not compatible with NGINX 1.21
-export NGINX_AJP_VERSION=fcbb2ccca4901d317ecd7a9dabb3fec9378ff40f
-
 # Check for recent changes: https://github.com/openresty/luajit2/compare/v2.1-20220411...v2.1-agentzh
 export LUAJIT_VERSION=2.1-20220411
 
@@ -271,9 +266,6 @@ get_src 8d39c6b23f941a2d11571daaccc04e69539a3fcbcc50a631837560d5861a7b96 \
 get_src 4c1933434572226942c65b2f2b26c8a536ab76aa771a3c7f6c2629faa764976b \
         "https://github.com/leev/ngx_http_geoip2_module/archive/$GEOIP2_VERSION.tar.gz"
 
-get_src 778fcca851bd69dabfb382dc827d2ee07662f7eca36b5e66e67d5512bad75ef8 \
-        "https://github.com/msva/nginx_ajp_module/archive/$NGINX_AJP_VERSION.tar.gz"
-
 get_src 5d16e623d17d4f42cc64ea9cfb69ca960d313e12f5d828f785dd227cc483fcbd \
         "https://github.com/openresty/lua-resty-upload/archive/v$LUA_RESTY_UPLOAD_VERSION.tar.gz"
 
@@ -633,7 +625,6 @@ WITH_MODULES=" \
   --add-module=$BUILD_PATH/lua-nginx-module-$LUA_NGX_VERSION \
   --add-module=$BUILD_PATH/stream-lua-nginx-module-$LUA_STREAM_NGX_VERSION \
   --add-module=$BUILD_PATH/lua-upstream-nginx-module-$LUA_UPSTREAM_VERSION \
-  --add-module=$BUILD_PATH/nginx_ajp_module-${NGINX_AJP_VERSION} \
   --add-dynamic-module=$BUILD_PATH/nginx-http-auth-digest-$NGINX_DIGEST_AUTH \
   --add-dynamic-module=$BUILD_PATH/nginx-opentracing-$NGINX_OPENTRACING_VERSION/opentracing \
   --add-dynamic-module=$BUILD_PATH/ModSecurity-nginx-$MODSECURITY_VERSION \

internal/ingress/annotations/backendprotocol/main.go

@@ -31,7 +31,7 @@ import (
 const HTTP = "HTTP"
 
 var (
-	validProtocols = regexp.MustCompile(`^(AUTO_HTTP|HTTP|HTTPS|AJP|GRPC|GRPCS|FCGI)$`)
+	validProtocols = regexp.MustCompile(`^(AUTO_HTTP|HTTP|HTTPS|GRPC|GRPCS|FCGI)$`)
 )
 
 type backendProtocol struct {

internal/ingress/controller/template/template.go

@@ -736,9 +736,6 @@ func buildProxyPass(host string, b interface{}, loc interface{}) string {
 	case "GRPCS":
 		proto = "grpcs://"
 		proxyPass = "grpc_pass"
-	case "AJP":
-		proto = ""
-		proxyPass = "ajp_pass"
 	case "FCGI":
 		proto = ""
 		proxyPass = "fastcgi_pass"

internal/ingress/controller/template/template_test.go

@@ -1137,7 +1137,6 @@ func TestOpentracingPropagateContext(t *testing.T) {
 		{BackendProtocol: "AUTO_HTTP"}: "opentracing_propagate_context;",
 		{BackendProtocol: "GRPC"}:      "opentracing_grpc_propagate_context;",
 		{BackendProtocol: "GRPCS"}:     "opentracing_grpc_propagate_context;",
-		{BackendProtocol: "AJP"}:       "opentracing_propagate_context;",
 		{BackendProtocol: "FCGI"}:      "opentracing_propagate_context;",
 		nil:                            "",
 	}
@@ -1157,7 +1156,6 @@ func TestOpentelemetryPropagateContext(t *testing.T) {
 		{BackendProtocol: "AUTO_HTTP"}: "opentelemetry_propagate;",
 		{BackendProtocol: "GRPC"}:      "opentelemetry_propagate;",
 		{BackendProtocol: "GRPCS"}:     "opentelemetry_propagate;",
-		{BackendProtocol: "AJP"}:       "opentelemetry_propagate;",
 		{BackendProtocol: "FCGI"}:      "opentelemetry_propagate;",
 		nil:                            "",
 	}

rootfs/etc/nginx/template/nginx.tmpl

@@ -307,7 +307,6 @@ http {
     client_body_temp_path           /tmp/nginx/client-body;
     fastcgi_temp_path               /tmp/nginx/fastcgi-temp;
     proxy_temp_path                 /tmp/nginx/proxy-temp;
-    ajp_temp_path                   /tmp/nginx/ajp-temp;
 
     client_header_buffer_size       {{ $cfg.ClientHeaderBufferSize }};
     client_header_timeout           {{ $cfg.ClientHeaderTimeout }}s;

test/e2e/annotations/backendprotocol.go

@@ -105,19 +105,4 @@ var _ = framework.DescribeAnnotation("backend-protocol", func() {
 				return strings.Contains(server, "fastcgi_pass upstream_balancer;")
 			})
 	})
-
-	ginkgo.It("should set backend protocol to '' and use ajp_pass", func() {
-		host := "backendprotocol.foo.com"
-		annotations := map[string]string{
-			"nginx.ingress.kubernetes.io/backend-protocol": "AJP",
-		}
-
-		ing := framework.NewSingleIngress(host, "/", host, f.Namespace, framework.EchoService, 80, annotations)
-		f.EnsureIngress(ing)
-
-		f.WaitForNginxServer(host,
-			func(server string) bool {
-				return strings.Contains(server, "ajp_pass upstream_balancer;")
-			})
-	})
 })