Fix #4726 Update puppet rrdtool metric code to support modern rrd ruby bindings

The rrd project has been shipping ruby bindings since 1.3.0, and the old
rrdtool ruby library is no longer being maintained.

This patch is based upon Davor Ocelic's submitted code, with the
addition that I've added conditionals so it can still call the old
rrdtool library if a modern rrd is not installed.

2 files changed, 40 insertions, 10 deletions

diff --git a/lib/puppet/feature/base.rb b/lib/puppet/feature/base.rb
index c153fba98..c983f5c12 100644
--- a/lib/puppet/feature/base.rb
+++ b/lib/puppet/feature/base.rb
@@ -27,7 +27,8 @@ Puppet.features.add :diff, :libs => %w{diff/lcs diff/lcs/hunk}
 Puppet.features.add(:augeas, :libs => ["augeas"])
 
 # We have RRD available
-Puppet.features.add(:rrd, :libs => ["RRDtool"])
+Puppet.features.add(:rrd_legacy, :libs => ["RRDtool"])
+Puppet.features.add(:rrd, :libs => ["RRD"])
 
 # We have OpenSSL
 Puppet.features.add(:openssl, :libs => ["openssl"])
diff --git a/lib/puppet/util/metric.rb b/lib/puppet/util/metric.rb
index 7e14a5fec..00898472f 100644
--- a/lib/puppet/util/metric.rb
+++ b/lib/puppet/util/metric.rb
@@ -31,9 +31,12 @@ class Puppet::Util::Metric
 
     start ||= Time.now.to_i - 5
 
-    @rrd = RRDtool.new(self.path)
     args = []
 
+    if Puppet.features.rrd_legacy? && ! Puppet.features.rrd?
+      @rrd = RRDtool.new(self.path)
+    end
+
     values.each { |value|
       # the 7200 is the heartbeat -- this means that any data that isn't
       # more frequently than every two hours gets thrown away
@@ -42,14 +45,22 @@ class Puppet::Util::Metric
     args.push "RRA:AVERAGE:0.5:1:300"
 
     begin
-      @rrd.create( Puppet[:rrdinterval].to_i, start, args)
+      if Puppet.features.rrd_legacy? && ! Puppet.features.rrd?
+        @rrd.create( Puppet[:rrdinterval].to_i, start, args)
+      else
+        RRD.create( self.path, '-s', Puppet[:rrdinterval].to_i.to_s, '-b', start.to_i.to_s, *args)
+      end
     rescue => detail
       raise "Could not create RRD file #{path}: #{detail}"
     end
   end
 
   def dump
-    puts @rrd.info
+    if Puppet.features.rrd_legacy? && ! Puppet.features.rrd?
+      puts @rrd.info
+    else
+      puts RRD.info self.path
+    end
   end
 
   def graph(range = nil)
@@ -82,14 +93,26 @@ class Puppet::Util::Metric
       args << lines
       args.flatten!
       if range
-        args.push("--start",range[0],"--end",range[1])
+        if Puppet.features.rrd_legacy? && ! Puppet.features.rrd?
+          args.push("--start",range[0],"--end",range[1])
+        else
+          args.push("--start",range[0].to_i.to_s,"--end",range[1].to_i.to_s)
+        end
       else
-        args.push("--start", Time.now.to_i - time, "--end", Time.now.to_i)
+        if Puppet.features.rrd_legacy? && ! Puppet.features.rrd?
+          args.push("--start", Time.now.to_i - time, "--end", Time.now.to_i)
+        else
+          args.push("--start", (Time.now.to_i - time).to_s, "--end", Time.now.to_i.to_s)
+        end
       end
 
       begin
         #Puppet.warning "args = #{args}"
-        RRDtool.graph( args )
+        if Puppet.features.rrd_legacy? && ! Puppet.features.rrd?
+          RRDtool.graph( args )
+        else
+          RRD.graph( *args )
+        end
       rescue => detail
         Puppet.err "Failed to graph #{self.name}: #{detail}"
       end
@@ -114,13 +137,15 @@ class Puppet::Util::Metric
   end
 
   def store(time)
-    unless Puppet.features.rrd?
+    unless Puppet.features.rrd? || Puppet.features.rrd_legacy?
       Puppet.warning "RRD library is missing; cannot store metrics"
       return
     end
     self.create(time - 5) unless FileTest.exists?(self.path)
 
-    @rrd ||= RRDtool.new(self.path)
+    if Puppet.features.rrd_legacy? && ! Puppet.features.rrd?
+      @rrd ||= RRDtool.new(self.path)
+    end
 
     # XXX this is not terribly error-resistant
     args = [time]
@@ -133,7 +158,11 @@ class Puppet::Util::Metric
     arg = args.join(":")
     template = temps.join(":")
     begin
-      @rrd.update( template, [ arg ] )
+      if Puppet.features.rrd_legacy? && ! Puppet.features.rrd?
+        @rrd.update( template, [ arg ] )
+      else
+        RRD.update( self.path, '-t', template, arg )
+      end
       #system("rrdtool updatev #{self.path} '#{arg}'")
     rescue => detail
       raise Puppet::Error, "Failed to update #{self.name}: #{detail}"