venerdì 30 marzo 2018

A basic NGINX cookbook for CHEF

Ok, this is how create a simple nginx cookbook for Chef.
For this example I don’t use chef-server, but i work directly on the machine. In my case the machine is a Vagrant VM based on Ubuntu/xenial64, but i think that you can use a VPS or Cloud service and others Linux OS.
As first thing to do, we must install ChefDK on our machine:
curl https://omnitruck.chef.io/install.sh | sudo bash -s -- -P chefdk -c stable
Then we have to create a folder called cookbooks where we will go to insert our cookbooks:
mkdir cookbooks
inside the cookbooks folder we create our first cookbook named mynginx:
cd cookbooks
chef generate cookbook mynginx
Edit the file default.rb in in mynginx/recipes/default.rb
package 'git'
package 'tree'

package 'nginx' do
  action :install
end


service 'nginx' do
  action [ :enable, :start ]
end


cookbook_file "/var/www/html/index.html" do
  source "index.html"
  mode "0644"
end
template "/etc/nginx/nginx.conf" do   
  source "nginx.conf.erb"
  notifies :reload, "service[nginx]"
end
from inside the mynginx folder I must generate a file index.html:
chef generate file index.html
edit the file index.html in files/default/index.html
<html>
  <head>
    <title>Hello there</title>
  </head>
  <body>
    <h1>This is a test</h1>
    <p>Please work!</p>
  </body>
</html>
create a templates named nginx.conf:
chef generate template nginx.conf
edit the file nginx.conf.erb in templates/nginx.conf.erb and insert your custom configuration of nginx.
user www-data;
worker_processes auto;
pid /run/nginx.pid;
events {
 worker_connections 768;
 # multi_accept on;
}
http {
 ##
 # Basic Settings
 ##
 sendfile on;
 tcp_nopush on;
 tcp_nodelay on;
 keepalive_timeout 65;
 types_hash_max_size 2048;
 # server_tokens off;
 # server_names_hash_bucket_size 64;
 # server_name_in_redirect off;
 include /etc/nginx/mime.types;
 default_type application/octet-stream;
 ##
 # SSL Settings
 ##
 ssl_protocols TLSv1 TLSv1.1 TLSv1.2; # Dropping SSLv3, ref: POODLE
 ssl_prefer_server_ciphers on;
 ##
 # Logging Settings
 ##
 access_log /var/log/nginx/access.log;
 error_log /var/log/nginx/error.log;
 ##
 # Gzip Settings
 ##
 gzip on;
 gzip_disable "msie6";
 # gzip_vary on;
 # gzip_proxied any;
 # gzip_comp_level 6;
 # gzip_buffers 16 8k;
 # gzip_http_version 1.1;
 # gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;
 ##
 # Virtual Host Configs
 ##
 include /etc/nginx/conf.d/*.conf;
 include /etc/nginx/sites-enabled/*;
}
#mail {
# # See sample authentication script at:
# # http://wiki.nginx.org/ImapAuthenticateWithApachePhpScript
# 
# # auth_http localhost/auth.php;
# # pop3_capabilities "TOP" "USER";
# # imap_capabilities "IMAP4rev1" "UIDPLUS";
# 
# server {
#  listen     localhost:110;
#  protocol   pop3;
#  proxy      on;
# }
# 
# server {
#  listen     localhost:143;
#  protocol   imap;
#  proxy      on;
# }
#}
now you can launch chef-client in local mode for install or update your machine:
sudo chef-client -z --runlist "mynginx"
Good Luck!

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