cfengine provisioner fails if redhat-like base box does not contain wget

[ghost]

When installing CFengine into a Redhat-like guest operating system, the cfengine provisioner assumes that wget(1) is available. I at least one case, that is not so. When wget is not available, provisioning fails with an unhelpful error message.

Vagrant version

Vagrant 1.8.1

Host operating system

OSX

Guest operating system

CentOS

Vagrantfile

Vagrant.configure(2) do |config|
  config.vm.box = "centos/7"
  config.vm.box_version =  "1603.01"
  config.vm.provision "cfengine" do |cfengine|
    cfengine.am_policy_hub = true
  end
end

Debug output

https://gist.github.com/norcnorc/1ea514d23ed136fad89a4854cc77774e#file-cfengine-fail-log-L10161

Expected behavior

The latest version of the "cfengine-community" package is installed into the VM.

Actual behavior

Installation of the "cfengine-community" package fails with an error message about GPG keys.

==> default: Installing CFEngine onto machine...
The following SSH command responded with a non-zero exit status.
Vagrant assumes that this means the command failed!

yum -y install cfengine-community

Stdout from the command:

Loaded plugins: fastestmirror


Stderr from the command:


You have enabled checking of packages via GPG keys. This is a good thing. 
However, you do not have any GPG public keys installed. You need to download
the keys for packages you wish to install and install them.
You can do that by running the command:
    rpm --import public.gpg.key


Alternatively you can specify the url to the key you would like to use
for a repository in the 'gpgkey' option in a repository section and yum 
will install it for you.

For more information contact your distribution or package provider.

Problem repository: cfengine-repository

Steps to reproduce

1. Run vagrant up

Workaround

Add the line

config.vm.provision "shell", inline: "yum install -y wget"

to the Vagrantfile, before the config.vm.provision "cfengine" line.

[briancain]

Because we can't address this for every dependency for each provider and provisioner, in this case it makes sense for the box maintainers to include wget on the box itself. Thanks!

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