From 8450e9ac59dfb678ae3fc2adca5bb837804710f3 Mon Sep 17 00:00:00 2001
From: Florian Pritz <bluewind@xinu.at>
Date: Sat, 13 Sep 2014 00:07:55 +0200
Subject: add some new scripts

Signed-off-by: Florian Pritz <bluewind@xinu.at>
---
 rrdtoolresize.pl | 174 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 174 insertions(+)
 create mode 100644 rrdtoolresize.pl

(limited to 'rrdtoolresize.pl')

diff --git a/rrdtoolresize.pl b/rrdtoolresize.pl
new file mode 100644
index 0000000..976c407
--- /dev/null
+++ b/rrdtoolresize.pl
@@ -0,0 +1,174 @@
+#!/usr/bin/perl
+#
+my $USAGE = "#
+#  Usage: $0 [ -v verbosity ] [ -f ] \
+  [ -R rranum:rows[;rranum:rows]* | -P pdp:rows[;pdp:rows]* ] RRDs(s)
+#  Where:
+#    -v verbosity   Specify the verbosity level (default = 10)
+#    -f             Fake (dry) run (assumed if -R not specified)
+#    -R X:Y[;X:Y]*  Resize rra X to have Y rows
+#    -M X:Y[;X:Y]*  Remap every RRA with X pdps to Y rows
+#
+#  File(s)
+#    These are RRD files that need to be 're-shaped'
+#
+#  If neither -M nor -P is specified, then info about the RRD
+#    will be printed
+#  If both -M and -R are specified, then -R takes precedence
+#
+";
+#
+
+use strict;
+use warnings;
+
+use RRDs;
+use Getopt::Std;
+use Data::Dumper;
+use Time::HiRes qw/time/;
+
+my $rrdtool = $ENV{'RRDTOOL'} || 'rrdtool';
+
+my %opt;
+getopts('fP:R:v:', \%opt) || die $USAGE;
+
+my $verbosity = $opt{'v'} || 10;
+my $rrastr    = $opt{'R'};
+my $pdpstr    = $opt{'P'};
+my $dryrun    = (defined $opt{'f'}) ||
+                  ((!defined $rrastr) && (!defined $pdpstr)) ? 1 : 0;
+my $dumpinfo  = ($verbosity >= 20) ||
+                  (!defined $pdpstr && !defined $rrastr) ? 1 : 0;
+
+my %rramap;
+if (defined $rrastr) {
+  my @rows = split(/\s*;\s*/, $rrastr);
+  foreach my $redo (@rows) {
+    my @info = split(/\s*:\s*/, $redo);
+    if ($#info != 1) {
+      die "Bad rra resize specification ($redo) in -R $rrastr! Died";
+    }
+    elsif ($info[1] < 1) {
+      die "Invalid rra row count ($info[1]) in -R $rrastr! Died";
+    }
+    elsif ($info[0] !~ /^\d+$/) {
+      die "Invalid rra number ($info[0]) in -R $rrastr! Died";
+    }
+    else {
+      $rramap{$info[0]} = int($info[1]);
+    }
+  }
+}
+
+my %pdpmap;
+if (defined $pdpstr) {
+  my @rows = split(/\s*;\s*/, $pdpstr);
+  foreach my $redo (@rows) {
+    my @info = split(/\s*:\s*/, $redo);
+    if ($#info != 1) {
+      die "Bad rra resize specification ($redo) in -P $pdpstr! Died";
+    }
+    elsif ($info[1] < 1) {
+      die "Invalid rra pdp count ($info[1]) in -P $pdpstr! Died";
+    }
+    elsif ($info[0] !~ /^\d+$/) {
+      die "Invalid rra number ($info[0]) in -P $pdpstr! Died";
+    }
+    else {
+      $pdpmap{$info[0]} = int($info[1]);
+    }
+  }
+}
+
+
+my @rrds = @ARGV;
+my $start = time;
+my $numfiles = 0;
+
+for my $rrd (sort @rrds) {
+    print "\nProcessing $rrd\n";
+    my $info = RRDs::info $rrd;
+    # Check to ensure we actually have a valid rrd file
+    if ($info->{filename}) {
+       printf "DEBUG: RRD %s info: %s\n",
+         $rrd, join("\n", sort split(/\n/, Dumper($info)))
+         if ($dumpinfo);
+    }
+    else {
+        print "$rrd isn't a valid rrd log, skipping\n";
+        next;
+    }
+
+    $numfiles++;
+    my @rras = sort map { substr($_, 4, index($_, ']', 4)-4) }
+                   grep { /rra\[\d+\].pdp_per_row/ } keys %{$info};
+
+    ## Debug:
+    # printf "Found:\n  %s\n", join("\n  ",
+    #        grep { /rra\[\d+\].pdp_per_row/ } keys %{$info});
+    # printf "RRAs: %s\n", join(" ", @rras);
+
+    foreach my $rra (sort { $a <=> $b } @rras) {
+        my $cmd = qq|$rrdtool resize $rrd |;
+        my $rows = $info->{"rra[$rra].rows"};
+        my $cf = $info->{"rra[$rra].cf"};
+        my $pdp = $info->{"rra[$rra].pdp_per_row"};
+        printf "\tDS %s => PDP per row:%.f Rows:%.f CF:%s\n",
+            $rra, $pdp, $rows, $cf; 
+        my $wanted = (defined $rramap{$rra}) ? $rramap{$rra} :
+                        (defined $pdpmap{$pdp}) ? $pdpmap{$pdp} : -1;
+        if ($wanted <= 0)
+        {
+          printf "DEBUG: Skipping RRA %s (no map found)\n", $rra
+            if ($verbosity >= 15);
+          next;
+        }
+        
+        my $diff = $rows - $wanted;
+        if ($diff < 0) {
+            $diff = abs($diff);
+            $cmd .= qq|$rra GROW $diff|;
+        }
+        elsif ($diff > 0) {
+            $cmd .= qq|$rra SHRINK $diff|;
+        }
+        else {
+            print "\tNo change to DS $rra\n\n";
+            next;
+        }
+
+        print "\tResizing to $wanted rows, executing $cmd\n";
+        if (!$dryrun) {
+          system($cmd) == 0 or die "\tCould not execute $cmd: $!";
+          print "\tRenaming resized file\n";
+
+          # We jump through a number of hoops because the RRD may not
+          # be in the current directory (but the created "resize.rrd"
+          # IS in the current directory!)
+          unlink $rrd.'.bk';
+
+          # Do this in case one of the steps below fails
+          rename $rrd, $rrd.'.bk' ||
+            die "\tUnable to move the old $rrd way!  Stopping";
+
+          if (!link('resize.rrd', $rrd)) {
+            print "\tNOTICE: link(resize.rrd, $rrd) failed.".
+                  "  Trying 'mv' instead!\n";
+            if (system("mv resize.rrd $rrd")) {
+              # Try to put the original RRD back
+              rename $rrd.'.bk', $rrd;
+              die "\tFailed to link/move resize.rrd to $rrd!  Died";
+            }
+          }
+          else {
+            unlink 'resize.rrd';
+            unlink $rrd.'.bk';
+          }
+          print "\tDone.\n";
+        }
+    }
+}
+
+my $end = time;
+my $dur = sprintf('%.2f', $end - $start);
+print "Finished, processed $numfiles files in $dur seconds\n\n";
-- 
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