From: Tom Hughes <tom@compton.nu>
Date: Fri, 4 Oct 2013 19:16:14 +0000 (+0100)
Subject: Use a lock file to stop multiple tile expirys running at once
X-Git-Url: https://git.openstreetmap.org./chef.git/commitdiff_plain/e1eee7937a3b5f480697025d783104f0a5711eb2

Use a lock file to stop multiple tile expirys running at once
---

diff --git a/cookbooks/tile/recipes/default.rb b/cookbooks/tile/recipes/default.rb
index d2f875611..b80dc01fb 100644
--- a/cookbooks/tile/recipes/default.rb
+++ b/cookbooks/tile/recipes/default.rb
@@ -488,6 +488,7 @@ template "/etc/rsyslog.d/20-renderd.conf" do
   notifies :restart, "service[rsyslog]"
 end
 
+package "liblockfile-simple-perl"
 package "libfilesys-df-perl"
 
 template "/usr/local/bin/cleanup-tiles" do
diff --git a/cookbooks/tile/templates/default/cleanup-tiles.erb b/cookbooks/tile/templates/default/cleanup-tiles.erb
index c4bff4cce..9209a2644 100644
--- a/cookbooks/tile/templates/default/cleanup-tiles.erb
+++ b/cookbooks/tile/templates/default/cleanup-tiles.erb
@@ -7,8 +7,12 @@ use warnings;
 
 use File::Temp qw(tmpnam);
 use Filesys::Df;
+use LockFile::Simple qw(lock unlock);
 
 my $tiledir = shift @ARGV;
+
+lock($tiledir) || exit 0;
+
 my $tempfile = tmpnam();
 
 if (df($tiledir)->{per} > 90)
@@ -45,4 +49,6 @@ if (df($tiledir)->{per} > 90)
 
 unlink($tempfile);
 
+unlock($tiledir);
+
 exit 0;