From 8837cf93e202b330b5bb99faa80100f928b23a56 Mon Sep 17 00:00:00 2001
From: Manuel de Brito Fontes <aledbf@gmail.com>
Date: Sun, 28 May 2017 16:05:49 -0400
Subject: [PATCH] Allow customization of variables hash tables

---
 controllers/nginx/configuration.md                     |  2 ++
 controllers/nginx/pkg/config/config.go                 | 10 ++++++++++
 controllers/nginx/rootfs/etc/nginx/template/nginx.tmpl |  3 +++
 3 files changed, 15 insertions(+)

diff --git a/controllers/nginx/configuration.md b/controllers/nginx/configuration.md
index eb4a8c0d34..d7d4b2c460 100644
--- a/controllers/nginx/configuration.md
+++ b/controllers/nginx/configuration.md
@@ -469,6 +469,8 @@ The following table shows the options, the default value and a description.
 |ssl-session-timeout|10m|
 |use-gzip|"true"|
 |use-http2|"true"|
+|variables-hash-bucket-size|64|
+|variables-hash-max-size|2048|
 |vts-status-zone-size|10m|
 |whitelist-source-range|permit all|
 |worker-processes|number of CPUs|
diff --git a/controllers/nginx/pkg/config/config.go b/controllers/nginx/pkg/config/config.go
index 9829876eb2..a1f00401b2 100644
--- a/controllers/nginx/pkg/config/config.go
+++ b/controllers/nginx/pkg/config/config.go
@@ -275,6 +275,14 @@ type Configuration struct {
 
 	// Defines the load balancing algorithm to use. The deault is round-robin
 	LoadBalanceAlgorithm string `json:"load-balance,omitempty"`
+
+	// Sets the bucket size for the variables hash table.
+	// http://nginx.org/en/docs/http/ngx_http_map_module.html#variables_hash_bucket_size
+	VariablesHashBucketSize int `json:"variables-hash-bucket-size,omitempty"`
+
+	// Sets the maximum size of the variables hash table.
+	// http://nginx.org/en/docs/http/ngx_http_map_module.html#variables_hash_max_size
+	VariablesHashMaxSize int `json:"variables-hash-max-size,omitempty"`
 }
 
 // NewDefault returns the default nginx configuration
@@ -315,6 +323,8 @@ func NewDefault() Configuration {
 		WorkerProcesses:          strconv.Itoa(runtime.NumCPU()),
 		LoadBalanceAlgorithm:     defaultLoadBalancerAlgorithm,
 		VtsStatusZoneSize:        "10m",
+		VariablesHashBucketSize:  64,
+		VariablesHashMaxSize:     2048,
 		UseHTTP2:                 true,
 		Backend: defaults.Backend{
 			ProxyBodySize:        bodySize,
diff --git a/controllers/nginx/rootfs/etc/nginx/template/nginx.tmpl b/controllers/nginx/rootfs/etc/nginx/template/nginx.tmpl
index ed68b65d2c..fde14e14cd 100644
--- a/controllers/nginx/rootfs/etc/nginx/template/nginx.tmpl
+++ b/controllers/nginx/rootfs/etc/nginx/template/nginx.tmpl
@@ -71,6 +71,9 @@ http {
     server_names_hash_bucket_size   {{ $cfg.ServerNameHashBucketSize }};
     map_hash_bucket_size            {{ $cfg.MapHashBucketSize }};
 
+    variables_hash_bucket_size      {{ $cfg.VariablesHashBucketSize }};
+    variables_hash_max_size         {{ $cfg.VariablesHashMaxSize }};
+
     underscores_in_headers          {{ if $cfg.EnableUnderscoresInHeaders }}on{{ else }}off{{ end }};
     ignore_invalid_headers          {{ if $cfg.IgnoreInvalidHeaders }}on{{ else }}off{{ end }};