[pve-devel] [PATCH v3 manager] close #3476: vzdump: add job-init hook

[Fabian Ebner <f.ebner@proxmox.com>]

which allows users to prepare the backup storage for activation (e.g.
by waking up a remote node).

Suggested-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
Reviewed-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
Acked-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
Signed-off-by: Fabian Ebner <f.ebner@proxmox.com>
---

Changes from v2:
    * Fix wording in comment.
    * More complete example commands in dummy hook script.

 PVE/VZDump.pm         | 17 ++++++++++++++++-
 vzdump-hook-script.pl | 12 +++++++++++-
 2 files changed, 27 insertions(+), 2 deletions(-)

diff --git a/PVE/VZDump.pm b/PVE/VZDump.pm
index b5a5fadd..65867325 100644
--- a/PVE/VZDump.pm
+++ b/PVE/VZDump.pm
@@ -497,6 +497,13 @@ sub new {
 	$opts->{storage} = 'local';
     }
 
+    $self->{job_init_log} = '';
+    open my $job_init_fd, '>', \$self->{job_init_log};
+    $self->run_hook_script('job-init', undef, $job_init_fd);
+    close $job_init_fd;
+
+    PVE::Cluster::cfs_update(); # Pick up possible changes made by the hook script.
+
     my $errors = '';
 
     if ($opts->{storage}) {
@@ -1194,7 +1201,15 @@ sub exec_backup {
 
     my $totaltime = time() - $starttime;
 
-    eval { $self->sendmail ($tasklist, $totaltime, undef, $job_start_log, $job_end_log); };
+    eval {
+	$self->sendmail(
+	    $tasklist,
+	    $totaltime,
+	    undef,
+	    $self->{job_init_log} . $job_start_log,
+	    $job_end_log,
+	);
+    };
     debugmsg ('err', $@) if $@;
 
     die $err if $err;
diff --git a/vzdump-hook-script.pl b/vzdump-hook-script.pl
index 60edbc04..4d530cef 100755
--- a/vzdump-hook-script.pl
+++ b/vzdump-hook-script.pl
@@ -11,11 +11,13 @@ print "HOOK: " . join (' ', @ARGV) . "\n";
 
 my $phase = shift;
 
-if ($phase eq 'job-start' ||
+if ($phase eq 'job-init' ||
+    $phase eq 'job-start' ||
     $phase eq 'job-end'  ||
     $phase eq 'job-abort') {
 
     # undef for Proxmox Backup Server storages
+    # undef in phase 'job-init' except when --dumpdir is used directly
     my $dumpdir = $ENV{DUMPDIR};
 
     # undef when --dumpdir is used directly
@@ -26,6 +28,14 @@ if ($phase eq 'job-start' ||
     print "storeid=$storeid;" if defined($storeid);
     print "\n";
 
+    # example: wake up remote storage node and enable storage
+    if ($phase eq 'job-init') {
+	#system("wakeonlan AA:BB:CC:DD:EE:FF");
+	#sleep(30);
+	#system ("/sbin/pvesm set $storeid --disable 0") == 0 ||
+	#    die "enabling storage $storeid failed";
+    }
+
     # do what you want
 
 } elsif ($phase eq 'backup-start' ||
-- 
2.30.2