removes packages that can still run docker after docker-ce is removed. (#379)

* removes leftover packages if present

* paramatise packages to remove when uninstalling

Author: davejrt

manifests/init.pp

@@ -16,6 +16,11 @@
 #   An array of additional packages that need to be installed to support
 #   docker. Defaults change depending on the operating system.
 #
+# [*dependent_packages*]
+#  An array of packages installed by the docker-ce package v 18.09 and later.
+#  Used when uninstalling to ensure containers cannot be run on the system.
+#  Defaults change depending on the operating system.
+#
 # [*tcp_bind*]
 #   The tcp socket to bind to in the format
 #   tcp://127.0.0.1:4243
@@ -386,6 +391,7 @@
   Optional[String] $version                                 = $docker::params::version,
   String $ensure                                            = $docker::params::ensure,
   Variant[Array[String], Hash] $prerequired_packages        = $docker::params::prerequired_packages,
+  Array $dependent_packages                                 = $docker::params::dependent_packages,
   String $docker_ce_start_command                           = $docker::params::docker_ce_start_command,
   Optional[String] $docker_ce_package_name                  = $docker::params::docker_ce_package_name,
   Optional[String] $docker_ce_source_location               = $docker::params::package_ce_source_location,

manifests/install.pp

@@ -25,7 +25,9 @@
   $nuget_package_provider_version = $docker::nuget_package_provider_version,
   $docker_msft_provider_version   = $docker::docker_msft_provider_version,
   $docker_ee_package_name         = $docker::docker_ee_package_name,
-  $docker_download_url            = $docker::package_location
+  $docker_download_url            = $docker::package_location,
+  $dependent_packages             = $docker::dependent_packages,
+
 ) {
   $docker_start_command = $docker::docker_start_command
   if $::osfamily {
@@ -88,6 +90,11 @@
           ensure => $ensure,
           name   => $docker::docker_package_name,
         }))
+        if $ensure == 'absent' {
+          ensure_resource('package', $dependent_packages, {
+            ensure => $ensure,
+          })
+        }
       } else {
         if $ensure == 'absent' {
           exec { 'remove-docker-package':

manifests/params.pp

@@ -305,4 +305,6 @@
     'RedHat' => ['device-mapper'],
     default  => [],
   }
+  $dependent_packages = ['docker-ce-cli','containerd.io']
+
 }

spec/classes/docker_spec.rb

@@ -706,21 +706,28 @@
         } }
         it { should contain_file(service_config_file).with_content(/-g \/mnt\/docker/) }
       end
-  
+
       context 'with custom root dir && Docker version > 17.05' do
         let(:params) { {
           'root_dir' => '/mnt/docker',
           'version'  => '18.03',
         } }
         it { should contain_file(service_config_file).with_content(/--data-root \/mnt\/docker/) }
       end
-       
+
 
       context 'with ensure absent' do
         let(:params) { {'ensure' => 'absent' } }
         it { should contain_package('docker').with_ensure('absent') }
       end
 
+      context 'with ensure absent and ' do
+        let(:params) { {'ensure' => 'absent' } }
+        it { should contain_package('docker').with_ensure('absent') }
+        it { should contain_package('docker-ce-cli').with_ensure('absent') }
+        it { should contain_package('containerd.io').with_ensure('absent') }
+      end
+
       context 'with an invalid combination of devicemapper options' do
         let(:params) {
           { 'dm_datadev' => '/dev/mapper/vg_test-docker--pool_tdata',