Description

Installs the OS's package for nginx, and configures it as a Reverse Proxy/ SSL terminator (e.g. in front of haproxy). Certificate content is read from an encrypted data bag.

See the Usage section below for more information.

Requirements

Cookbooks

• nginx http://community.opscode.com/cookbooks/nginx

Attributes

The following attributes are defined in this cookbook:

• node[:nginx][:cert_items] - the name/id of the item to read from an encrypted data bag, containing the .crt and .key
• node[:nginx][:listen] - non-ssl port on which nginx listens. If ssl_only is true, all connections to this port will be redirected to the ssl_listen port. (default is 80)
• node[:nginx][:ssldir] - directory where ssl certs are stored. This is a subdirectory of node[:nginx][:dir].
• node[:nginx][:ssl_protocols] - the SSL protocols to use (default is "SSLv3 TLSv1")
• node[:nginx][:ssl_ciphers] - SSL ciphers to use (default is "ALL:!aNULL:!ADH:!eNULL:!LOW:!MEDIUM:!EXP:RC4+RSA:+HIGH")
• node[:nginx][:ssl_prefer_server_ciphers] - whether or not to prefer server ciphers. (default is 'on')
• node[:nginx][:use_epoll] - whether or not to use epoll for events (default is true)
• node[:nginx][:multi_accept] - accept as many connections as possible after nginx gets notification about a new connection (default is 'on')
• node[:nginx][:ssl_only] - if true (the default), all connections to the default listen port will be redirected to the ssl_list port.

The upstream module is used to proxy connections to another server (e.g an app server or haproxy)

• node[:nginx][:upstream][:name] - The name used for the group of upstream servers.

• node[:nginx][:upstream][:servers] - an array of hashes used to specify upstream servers. This should be specified in a role as follows:

  node[:nginx][:upstream][:servers] = [ { :address => "127.0.0.1:8000", :max_fails => "3", :fail_timeout => "0", :weight => "1", :down => false } ]

Additionally, this cookbook will read attribute values set in the Opscode nginx cookbook. See attributes/default.rb for more information.

Usage

Uses the Opscode cookbook to install the package for nginx (not the source), then reconfigures it as an SSL Terminator, using content from an Encrypted data bag.

This cookbook requires an Encrypted data bag named nginx_ssl_certs. Create items in it with a command similar to the following:

knife data bag create nginx_ssl_certs <itemname> --secret-file ~/.chef/encrypted_data_bag_secret

Be sure to to use your own path to your secret key file. You can read more about Encrypted data bags at http://wiki.opscode.com/display/chef/Encrypted+Data+Bags.

The nginx_ssl_certs data bag item should contain the following information, where cert is an array of strings where each element is a line from the .crt file. Likewise, key is an array of strings where each element is line from the .key file.

{
  "id": "sample",
  "cert": [
        "-----BEGIN CERTIFICATE-----", 
        "MIICsTCCAhoCCQCKBuQTIHEABTANBgkqhkiG9w0BAQUFADCBnDELMAkGA1UEBhMC", 
        " ... ",
        "veZRPC/Iejl87hJfY8zXRbCU6L9G", 
        "-----END CERTIFICATE-----"
    ],
    "key": [
        "-----BEGIN RSA PRIVATE KEY-----", 
        "MIICXAIBAAKBgQDkBUHn7l+Hkp46IeoztoqXRNl1dCLR19inwWHoIY5a4E5nSPXm", 
        " ... ",
        "M2owmeBtHavxmmSMWebacZSiWSrRJogmnYxfqV2+Cgo=", 
        "-----END RSA PRIVATE KEY-----"
    ]
}

License and Author

Author:: Brad Montgomery (bmontgomery@coroutine.com)

Copyright:: 2012, Coroutine LLC

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.