Chef: cannot load such file -- moneta/basic_file - ruby

Question

I am running a recipe which I have used a bazillion times before, and im getting these errors when I spin up a new EC2 instance with chef + knife.
[2013-01-30T23:44:48+00:00] INFO: Processing user[dan] action create (/var/chef/cache/cookbooks/users/providers/manage.rb line 65)
[2013-01-30T23:44:48+00:00] INFO: user[dan] created
[2013-01-30T23:44:48+00:00] INFO: Processing directory[/home/dan/.ssh] action create (/var/chef/cache/cookbooks/users/providers/manage.rb line 81)
[2013-01-30T23:44:48+00:00] INFO: directory[/home/dan/.ssh] created directory /home/dan/.ssh
[2013-01-30T23:44:48+00:00] INFO: directory[/home/dan/.ssh] owner changed to 2003
[2013-01-30T23:44:48+00:00] INFO: directory[/home/dan/.ssh] group changed to 2003
[2013-01-30T23:44:48+00:00] INFO: directory[/home/dan/.ssh] mode changed to 700
[2013-01-30T23:44:48+00:00] INFO: Processing template[/home/dan/.ssh/authorized_keys] action create (/var/chef/cache/cookbooks/users/providers/manage.rb line 88)
[2013-01-30T23:44:48+00:00] FATAL: Could not load Moneta back end "BasicFile"
================================================================================
Error executing action `create` on resource 'template[/home/dan/.ssh/authorized_keys]'
================================================================================
LoadError
---------
cannot load such file -- moneta/basic_file
Resource Declaration:
---------------------
# In /var/chef/cache/cookbooks/users/providers/manage.rb
88: template "#{home_dir}/.ssh/authorized_keys" do
89: source "authorized_keys.erb"
90: cookbook new_resource.cookbook
91: owner u['id']
92: group u['gid'] || u['id']
93: mode "0600"
94: variables :ssh_keys => u['ssh_keys']
95: end
96: end
Compiled Resource:
------------------
# Declared in /var/chef/cache/cookbooks/users/providers/manage.rb:88:in `block (2 levels) in class_from_file'
template("/home/dan/.ssh/authorized_keys") do
provider Chef::Provider::Template
action "create"
retries 0
retry_delay 2
path "/home/dan/.ssh/authorized_keys"
backup 5
source "authorized_keys.erb"
cookbook "users"
variables {:ssh_keys=>"ssh-rsa <REPLACED BECAUSE SHUTUP>!"}
cookbook_name "users"
mode "0600"
owner "dan"
group "dan"
end
[2013-01-30T23:44:48+00:00] ERROR: Running exception handlers
[2013-01-30T23:44:48+00:00] FATAL: Saving node information to /var/chef/cache/failed-run-data.json
[2013-01-30T23:44:48+00:00] ERROR: Exception handlers complete
[2013-01-30T23:44:48+00:00] FATAL: Stacktrace dumped to /var/chef/cache/chef-stacktrace.out
[2013-01-30T23:44:48+00:00] FATAL: LoadError: template[/home/dan/.ssh/authorized_keys] (/var/chef/cache/cookbooks/users/providers/manage.rb line 88) had an error: LoadError: cannot load such file -- moneta/basic_file
I have no idea what is going on, what moneta is, or why it cannot build from that template. The template is in templates/default/authorized_keys.erb as expected.

Answer 1

It's the "moneta" gem, which was recently upgraded. Luckily, there is a simple fix (roll it back!), unless you are using new functionality inside that gem. Perform the following:
gem install moneta --version=0.6.0
gem uninstall moneta
... and then uninstall all versions of moneta >= 0.7.0
Reference chef ticket