Add new Redis node

Makes it work with the same cloudinit code on Ubuntu 20.04 by mounting
it from a custom ISO as CD-ROM

site-cookbooks/kosmos_gitea/files/rate_limits.conf

@@ -1,25 +0,0 @@
-# Increase if you have very long User-Agent strings
-map_hash_bucket_size 256;
-
-# Bot user agents
-map $http_user_agent $bot_name {
-    default              "";
-    ~*ClaudeBot          "claude";
-    ~*Sogou              "sogou";
-    ~*meta-externalagent "meta-externalagent";
-    # add more as needed
-}
-
-# Decide the rate-limit key (per-IP for each bot in this example)
-map $bot_name $bot_limit_key {
-    default              "";
-    "claude"             $binary_remote_addr;
-    "sogou"              $binary_remote_addr;
-    "meta-externalagent" $binary_remote_addr;
-}
-
-# Shared memory zone – only non-empty keys are counted
-limit_req_zone $bot_limit_key zone=bots:20m rate=240r/m; # 4r/s per IP+bot
-
-# Status code returned when the limit is exceeded
-limit_req_status 429;

site-cookbooks/kosmos_gitea/recipes/nginx.rb

@@ -17,14 +17,6 @@ tls_cert_for domain do
   action :create
 end
 
-# Slow down requests from bots
-cookbook_file "#{node["openresty"]["dir"]}/conf.d/rate_limits.conf" do
-  source "rate_limits.conf"
-  owner "root"
-  group "root"
-  mode "0644"
-end
-
 openresty_site domain do
   template "nginx_conf_web.erb"
   variables server_name:   domain,

site-cookbooks/kosmos_gitea/templates/default/nginx_conf_web.erb

@@ -20,9 +20,6 @@ server {
 
   proxy_intercept_errors on;
 
-  # Rate limit for bots. Defined in /etc/openresty/conf.d/rate_limits.conf
-  limit_req zone=bots burst=10; # allow a larger spike for asset bursts
-
   location ~ ^/(avatars|repo-avatars)/.*$ {
     proxy_buffers 1024 8k;
     proxy_pass http://_gitea_web;