cwjohnston · January 7, 2011 18:36 · Jan 7, 2011
diff --git a/swapfile.rb b/swapfile.rb
@@ -0,0 +1,109 @@
+#
+# Provider Name:: swapfile
+#
+# Copyright 2010, Blue Coat Systems Inc.
+#
+
+require 'chef/mixin/command'
+include Chef::Mixin::Command
+
+action :create do
+  unless @swap.exists
+    execute "/bin/dd if=/dev/zero of= bs=1 count=#{params[:size]}"
+
+
+
+
+  if File.exist?("#{params[:name]}")
+    if File.size?("#{params[:name]}") == params[:size]
+      Chef::Log.debug "Existing size of #{params[:name]} already matches desired swapfile size of #{params[:size]}"
+      new_resource.updated = false
+    else
+      if system("/bin/swapoff #{params[:name]}")
+        Chef::Log.info "Creating swapfile at #{params[:name]}"
+        if system("/bin/dd if=/dev/zero of=#{params[:name]} bs=1 count=#{params[:size]}") 
+          if system("/sbin/mkswap #{params[:name]}")
+            if system("/usr/local/bin/fstab-update")
+                new_resource.updated = true
+            else
+               Chef::Log.info "Failed to update /etc/fstab using fstab-update"
+            end
+          else
+            Chef::Log.info "Failed to execute mkswap against #{params[:name]}"
+            new_resource.updated = false
+          end
+        else
+          Chef::Log.info "Failed to create swapfile of size #{params[:size]} at #{params[:name]}"
+          new_resource.updated = false
+        end
+      else
+        Chef::Log.info "Failed to swapoff #{params[:name]} for swapfile resizing. No action taken."
+        new_resource.updated = false
+      end
+    end
+  else
+    Chef::Log.info "Creating swapfile at #{params[:name]}"
+    system("/bin/dd if=/dev/zero of=#{params[:name]} bs=1M count=#{params[:size]}")
+    new_resource.updated = true
+  end
+end
+
+#action :delete do
+#  if File.exist?("#{params[:name]}") 
+#    if system("/bin/swapoff #{params[:name]}")
+#      if File.delete("#{params[:name]}")
+#         Chef::Log.info "Deleting swapfile at #{params[:name]}"
+#         new_resource.updated = true
+#      else
+#        Chef::Log.info "Failed to delete swapfile at #{params[:name]}"
+#        new_resource.updated = false
+#      end
+#    else
+#      Chef::Log.info "You asked me to delete a swapfile at #{params[:name]} but I could not swapoff that file."
+#      new_resource.updated = false
+#    end
+#  else
+#    Chef::Log.info "You asked me to delete a swapfile at #{params[:name]} but the specified file does not exist. No action taken."
+#    new_resource.updated = false
+#  end
+#end
+
+def load_current_resource
+  @swap = Chef::Resource::Swapfile.new(new_resource.swap_name)
+  @swap.swap_name(new_resource.swap_name)
+
+  Chef::Log.debug("Checking for existing swap file #{new_resource.swap_name}")
+
+  begin
+    if File.exist?("#{new_resource.swap_name}") 
+      @swap.exists(true)
+    end
+  rescue Chef::Exceptions::Exec
+    @swap.exists(false)
+    nil
+  end
+
+  Chef::Log.debug("Checking size of existing swap file #{new_resource.swap_name}")
+
+  begin
+    if @swap.exists
+      @swap.size(File.size("#{new_resource.swap_name}"))
+    end
+  rescue Chef::Exceptions::Exec
+    @swap.size(nil)
+    nil
+  end
+
+  Chef::Log.debug("Checking status of swap file #{new_resource.swap_name}")
+
+  begin
+    if @swap.exists
+      if system("/bin/swapon -s | grep #{new_resource.swap_name}")
+        @swap.enabled(true)
+      end
+    end
+   rescue Chef::Exceptions::Exec
+     @swap.enabled(false)
+     nil
+   end
+end