diff --git a/plugins/nginx/nginx_byprojects/README.md b/plugins/nginx/nginx_byprojects/README.md
index d2b59505..7f93095f 100644
--- a/plugins/nginx/nginx_byprojects/README.md
+++ b/plugins/nginx/nginx_byprojects/README.md
@@ -6,35 +6,27 @@ Count the number of hits per projects/vhost.
 ![byproject_access](https://www.mantor.org/~northox/misc/munin-plugins/nginx_byprojects_access1-month.png "byproject_access")
 
 ## munin_byprojects_bandwidth
-Count the total bandwidth used by each projects/vhost. [Logtail] (https://www.fourmilab.ch/webtools/logtail/) is required.  
+Count the total bandwidth used by each projects/vhost. [Logtail](https://www.fourmilab.ch/webtools/logtail/) is required.  
 ![byproject_bandwidth](https://www.mantor.org/~northox/misc/munin-plugins/apache_byprojects_bandwidth-month.png "byproject_bandwidth")
 
 ## munin_byprojects_inout_bandwidth
-Counts the in/out bandwidth used by each projects/vhost. [Logtail] (https://www.fourmilab.ch/webtools/logtail/) is required.  
+Counts the in/out bandwidth used by each projects/vhost. [Logtail](https://www.fourmilab.ch/webtools/logtail/) is required.  
 ![byproject_inout_bandwidth](https://www.mantor.org/~northox/misc/munin-plugins/apache_byprojects_inout_bandwidth-month.png "byproject_inout_bandwidth")
 
 ## Installation
 The setup is pretty straight forward. First you need to configure the plugin:
 
-Define the path to logtail:
+In your munin plugin configuration file (for example, a new dedicated /etc/munin/plugin-conf.d/nginx_byprojects), configure the plugins : 
 
-      $logtail = '/usr/local/bin/logtail';
+      [byprojects_*]
+      env.logtail /usr/local/bin/logtail
 
-Multiple logs can be used for the same project/vhost and a regular expression (regex) can be used as a filter:
+Multiple logs can be used for the same project/vhost and a regular expression (regex) can be used as a filter.
+Each log is defined in a dedicated environment variable, named env.site.[siteName]. The value is JSON formatted.
 
-      my %logs = (
-        'prod' => [
-                    {'path' => '/home/prod/log/access.log'}
-                  ],
-         'dev' => [
-                    {'path' => '/var/log/httpd/ssl-dev-access.log'},
-                    {'path' => '/home/dev/log/access*.log'} # glob is supported
-                  ],
-        'test' => [
-                    {'path' => '/var/log/access.log', 'regex' => '"[A-Z]+ /test/'},
-                    {'path' => '/home/test/log/access.log'}
-                  ],
-      );
+      env.site.prod 	[{"path":"/home/prod/log/access.log"}]
+      env.site.dev		[{"path":"/var/log/httpd/ssl-dev-access.log"}, {"path":"/home/dev/log/access*.log"}]
+      env.site.test 	[{"path":"/var/log/access.log","regex":"\"[A-Z]+ /test/"}, {"path":"/home/test/log/access.log"}]
 
 In the previous example the prod project graph will be using everything in /home/prod/log/access.log. The test project will be using eveything in /home/test/log/access.log and stuff that match '"[A-Z] /test/' in /var/log/httpd/access.log (e.g. "GET /test/).
 
@@ -42,5 +34,7 @@ Then link the file just as any other plugins.
 
       ln -s /usr/local/sbin/<plugin> /usr/local/etc/munin/plugins/<plugin>
 
+And restart the munin-node service.
+	  
 ## License
 MIT
diff --git a/plugins/nginx/nginx_byprojects/byprojects_access b/plugins/nginx/nginx_byprojects/byprojects_access
old mode 100644
new mode 100755
index 81d755dd..bc400504
--- a/plugins/nginx/nginx_byprojects/byprojects_access
+++ b/plugins/nginx/nginx_byprojects/byprojects_access
@@ -1,5 +1,6 @@
 #!/usr/bin/perl -w
 use strict;
+use JSON qw(decode_json);
 #
 # byprojects_access
 #
@@ -23,25 +24,23 @@ use strict;
 #   Test graph will be using everything file matching /home/test/log/access*.log
 #   and stuff that match the expression '"[A-Z] /test/' in /var/log/access.log
 #   such as '"GET /test/'
+#
+# Configuration
+# [byprojects_*]
+# env.logtail_path /usr/local/bin/logtail
+# env.site.prod  [{"path":"/home/prod/log/access.log"}]
+# env.site.dev   [{"path":"/var/log/httpd/ssl-dev-access.log"}, {"path":"/home/dev/log/access*.log"}]
+# env.site.test  [{"path":"/var/log/access.log","regex":"\"[A-Z]+ /test/"}, {"path":"/home/test/log/access.log"}]
 
 my $server = 'Nginx';
 
 my $statepath = $ENV{MUNIN_PLUGSTATE};
-my $logtail = '/usr/local/bin/logtail';
+my $logtail = $ENV{logtail_path} || '/usr/local/bin/logtail';
 
-my %logs = (
-    'prod' => [
-                {'path' => '/home/prod/log/access.log'}
-              ],
-    'dev'  => [
-                {'path' => '/var/log/httpd/ssl-dev-access.log'},
-                {'path' => '/home/dev/log/access*.log'} # glob is supported
-              ],
-    'test' => [
-                {'path' => '/var/log/access.log', 'regex' => '"[A-Z]+ /test/'},
-                {'path' => '/home/test/log/access.log'}
-              ],
-);
+my @loglist = grep {$_ =~ /site\./} keys(%ENV);
+my %envLogs = %ENV{@loglist};
+my %logs;
+while(my($k, $v) = each %envLogs) { @logs{substr($k, 5)} = decode_json($v); }
 
 ###########
 
diff --git a/plugins/nginx/nginx_byprojects/byprojects_bandwidth b/plugins/nginx/nginx_byprojects/byprojects_bandwidth
old mode 100644
new mode 100755
index 1ccce21a..af245e96
--- a/plugins/nginx/nginx_byprojects/byprojects_bandwidth
+++ b/plugins/nginx/nginx_byprojects/byprojects_bandwidth
@@ -1,5 +1,6 @@
 #!/usr/bin/perl -w
 use strict;
+use JSON qw(decode_json);
 #
 # byprojects_bandwidth
 #
@@ -29,26 +30,23 @@ use strict;
 #   Test graph will be using everything file matching /home/test/log/access*.log
 #   and stuff that match the expression '"[A-Z] /test/' in /var/log/access.log
 #   such as '"GET /test/'
+#
+# Configuration
+# [byprojects_*]
+# env.logtail_path /usr/local/bin/logtail
+# env.site.prod  [{"path":"/home/prod/log/access.log"}]
+# env.site.dev   [{"path":"/var/log/httpd/ssl-dev-access.log"}, {"path":"/home/dev/log/access*.log"}]
+# env.site.test  [{"path":"/var/log/access.log","regex":"\"[A-Z]+ /test/"}, {"path":"/home/test/log/access.log"}]
 
 my $server = 'Nginx';
 
 my $statepath = $ENV{MUNIN_PLUGSTATE};
-my $logtail = '/usr/local/bin/logtail';
-
-my %logs = (
-    'prod' => [
-                {'path' => '/home/prod/log/access.log'}
-              ],
-    'dev'  => [
-                {'path' => '/var/log/httpd/ssl-dev-access.log'},
-                {'path' => '/home/dev/log/access.log'}
-              ],
-    'test' => [
-                {'path' => '/var/log/access.log', 'regex' => '"[A-Z]+ /test/'},
-                {'path' => '/home/test/log/access.log'}
-              ],
-);
+my $logtail = $ENV{logtail_path} || '/usr/local/bin/logtail';
 
+my @loglist = grep {$_ =~ /site\./} keys(%ENV);
+my %envLogs = %ENV{@loglist};
+my %logs;
+while(my($k, $v) = each %envLogs) { @logs{substr($k, 5)} = decode_json($v); }
 
 ###########
 
diff --git a/plugins/nginx/nginx_byprojects/byprojects_inout_bandwidth b/plugins/nginx/nginx_byprojects/byprojects_inout_bandwidth
old mode 100644
new mode 100755
index 8f02826b..21b36902
--- a/plugins/nginx/nginx_byprojects/byprojects_inout_bandwidth
+++ b/plugins/nginx/nginx_byprojects/byprojects_inout_bandwidth
@@ -1,5 +1,6 @@
 #!/usr/bin/perl -w
 use strict;
+use JSON qw(decode_json);
 #
 # byprojects_inout_bandwidth
 #
@@ -29,26 +30,23 @@ use strict;
 #   Test graph will be using everything file matching /home/test/log/access*.log
 #   and stuff that match the expression '"[A-Z] /test/' in /var/log/access.log
 #   such as '"GET /test/'
+#
+# Configuration
+# [byprojects_*]
+# env.logtail_path /usr/local/bin/logtail
+# env.site.prod  [{"path":"/home/prod/log/access.log"}]
+# env.site.dev   [{"path":"/var/log/httpd/ssl-dev-access.log"}, {"path":"/home/dev/log/access*.log"}]
+# env.site.test  [{"path":"/var/log/access.log","regex":"\"[A-Z]+ /test/"}, {"path":"/home/test/log/access.log"}]
 
 my $server = 'Nginx';
 
 my $statepath = $ENV{MUNIN_PLUGSTATE};
-my $logtail = '/usr/local/bin/logtail';
-
-my %logs = (
-    'prod' => [
-                {'path' => '/home/prod/log/access.log'}
-              ],
-    'dev'  => [
-                {'path' => '/var/log/httpd/ssl-dev-access.log'},
-                {'path' => '/home/dev/log/access.log'}
-              ],
-    'test' => [
-                {'path' => '/var/log/access.log', 'regex' => '"[A-Z]+ /test/'},
-                {'path' => '/home/test/log/access.log'}
-              ],
-);
+my $logtail = $ENV{logtail_path} || '/usr/local/bin/logtail';
 
+my @loglist = grep {$_ =~ /site\./} keys(%ENV);
+my %envLogs = %ENV{@loglist};
+my %logs;
+while(my($k, $v) = each %envLogs) { @logs{substr($k, 5)} = decode_json($v); }
 
 ###########