WIP: allow injecting of arbitrary env variables

CHANGELOG.md

@@ -5,6 +5,12 @@ cookbook. Please see HISTORY.md for changes from older versions of this project.
 
 ## [Unreleased]
 
+### Security
+- locked down permissions of `/etc/default/sensu` to be owned and grouped by `root` and to only be readable or writable by its owner (@majormoses)
+
+### Added
+- support for injecting arbitrary env vars into `/etc/default/sensu` (@majormoses)
+
 ## [5.4.0] - 2018-09-14
 ### Added
 - exposed `package_name` as an optional parameter to the `sensu_gem` resource in case you need to install multiple versions of a gem. (@majormoses)

README.md

@@ -211,6 +211,10 @@ for Sensu to start/stop.
 
 `node["sensu"]["loaded_tempfile_dir"]` - Where Sensu stores temporary files. Set a persistent directory if you use hardened system that cleans temporary directory regularly.
 
+`node['sensu']['env_vars]` - A hash of key value pairs that will be written to `/etc/default/sensu` which will be passed to the sensu proces as ENV vars. This defaults to `nil` and only triggers when it is not `nil`.
+
+`node['sensu']['etc_default_sensu']['cookbook']` - A string that allows you to choose the cookbook that you wish to pull the template for writing `/etc/default/sensu` from, this is useful in the case of wanting to write your own template in your wrapper cookbook. This defaults to `'sensu'` which is this cookbook.
+
 ### Windows
 
 Sensu requires Microsoft's .Net Framework to run on Windows. The following attributes influence the installation of .Net via this cookbook:

attributes/default.rb

@@ -69,3 +69,7 @@
 default["sensu"]["data_bag"]["ssl_item"] = "ssl"
 default["sensu"]["data_bag"]["config_item"] = "config"
 default["sensu"]["data_bag"]["enterprise_item"] = "enterprise"
+
+# inject arbitrary env vars into the sensu process
+default['sensu']['env_vars'] = nil
+default['sensu']['etc_default_sensu']['cookbook'] = 'sensu'

recipes/_linux.rb

@@ -122,5 +122,9 @@
 
 template "/etc/default/sensu" do
   source "sensu.default.erb"
+  cookbook node['sensu']['etc_default_sensu']['cookbook']
+  mode '400'
+  user 'root'
+  group 'root'
   notifies :create, "ruby_block[sensu_service_trigger]"
 end

templates/default/sensu.default.erb

@@ -5,3 +5,8 @@ SERVICE_MAX_WAIT=<%= node["sensu"]["service_max_wait"] %>
 CLIENT_DEREGISTER_ON_STOP=<%= node["sensu"]["client_deregister_on_stop"] %>
 <%= node["sensu"]["client_deregister_handler"] ? %|CLIENT_DEREGISTER_HANDLER=#{node["sensu"]["client_deregister_handler"]}| : nil %>
 <%= node["sensu"]["loaded_tempfile_dir"] ? %|export SENSU_LOADED_TEMPFILE_DIR=#{node["sensu"]["loaded_tempfile_dir"]}| : nil %>
+
+<% unless node['sensu']['env_vars'].nil? do |k, v| -%>
+<%= k %>=<%= v %>
+<% end %>
+<% end %>