[pve-devel] [PATCH v2 pve-manager 1/2] api2: add suspendall endpoint

[Hannes Laimer <h.laimer@proxmox.com>]

Handels pause and hibernation, the reason for not splitting it was to mirror
the behaviour of the already existing suspend endpoint for single VMs.

Signed-off-by: Hannes Laimer <h.laimer@proxmox.com>
---

Endpoint code is mostly taken from already existing ednpoints, namely
stopall and startall.

 PVE/API2/Nodes.pm | 119 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 119 insertions(+)

diff --git a/PVE/API2/Nodes.pm b/PVE/API2/Nodes.pm
index 8172231e..3e6e9fa2 100644
--- a/PVE/API2/Nodes.pm
+++ b/PVE/API2/Nodes.pm
@@ -1943,6 +1943,125 @@ __PACKAGE__->register_method ({
 	return $rpcenv->fork_worker('stopall', undef, $authuser, $code);
     }});
 
+my $create_suspend_worker = sub {
+    my ($nodename, $type, $vmid, $down_timeout, $todisk) = @_;
+
+    my $upid;
+    if ($type eq 'qemu') {
+	return if !PVE::QemuServer::check_running($vmid, 1);
+	my $timeout =  defined($down_timeout) ? int($down_timeout) : 60*3;
+	print STDERR "Suspending VM $vmid (timeout = $timeout seconds)\n";
+	$upid = PVE::API2::Qemu->vm_suspend({node => $nodename, vmid => $vmid, todisk => $todisk});
+    } else {
+	die "suspension is only supported on VMs, not on '$type'\n";
+    }
+
+    return $upid;
+};
+
+__PACKAGE__->register_method ({
+    name => 'suspendall',
+    path => 'suspendall',
+    method => 'POST',
+    protected => 1,
+    permissions => {
+	check => ['perm', '/', [ 'VM.PowerMgmt' ]],
+    },
+    proxyto => 'node',
+    description => "Suspend all VMs.",
+    parameters => {
+    	additionalProperties => 0,
+	properties => {
+	    node => get_standard_option('pve-node'),
+	    vms => {
+		description => "Only consider Guests with these IDs.",
+		type => 'string',  format => 'pve-vmid-list',
+		optional => 1,
+	    },
+	    todisk => {
+		type => 'boolean',
+		default => 0,
+		optional => 1,
+		description => 'If set, suspends the VM to disk. Will be resumed on next VM start.',
+	    },
+	},
+    },
+    returns => {
+	type => 'string',
+    },
+    code => sub {
+	my ($param) = @_;
+
+	my $rpcenv = PVE::RPCEnvironment::get();
+	my $authuser = $rpcenv->get_user();
+
+	my $nodename = $param->{node};
+	$nodename = PVE::INotify::nodename() if $nodename eq 'localhost';
+
+	my $code = sub {
+
+	    $rpcenv->{type} = 'priv'; # to start tasks in background
+
+	    my $stopList = &$get_start_stop_list($nodename, undef, $param->{vms});
+
+	    my $cpuinfo = PVE::ProcFSTools::read_cpuinfo();
+	    my $datacenterconfig = cfs_read_file('datacenter.cfg');
+	    # if not set by user spawn max cpu count number of workers
+	    my $maxWorkers =  $datacenterconfig->{max_workers} || $cpuinfo->{cpus};
+
+	    foreach my $order (sort {$b <=> $a} keys %$stopList) {
+		my $vmlist = $stopList->{$order};
+		my $workers = {};
+
+		my $finish_worker = sub {
+		    my $pid = shift;
+		    my $d = $workers->{$pid};
+		    return if !$d;
+		    delete $workers->{$pid};
+
+		    syslog('info', "end task $d->{upid}");
+		};
+
+		foreach my $vmid (sort {$b <=> $a} keys %$vmlist) {
+		    my $d = $vmlist->{$vmid};
+		    my $upid;
+		    eval { $upid = &$create_suspend_worker($nodename, $d->{type}, $vmid, $d->{down}, $param->{todisk}); };
+		    warn $@ if $@;
+		    next if !$upid;
+
+		    my $res = PVE::Tools::upid_decode($upid, 1);
+		    next if !$res;
+
+		    my $pid = $res->{pid};
+
+		    $workers->{$pid} = { type => $d->{type}, upid => $upid, vmid => $vmid };
+		    while (scalar(keys %$workers) >= $maxWorkers) {
+			foreach my $p (keys %$workers) {
+			    if (!PVE::ProcFSTools::check_process_running($p)) {
+				&$finish_worker($p);
+			    }
+			}
+			sleep(1);
+		    }
+		}
+		while (scalar(keys %$workers)) {
+		    foreach my $p (keys %$workers) {
+			if (!PVE::ProcFSTools::check_process_running($p)) {
+			    &$finish_worker($p);
+			}
+		    }
+		    sleep(1);
+		}
+	    }
+
+	    syslog('info', "all VMs suspended");
+
+	    return;
+	};
+
+	return $rpcenv->fork_worker('suspendall', undef, $authuser, $code);
+    }});
+
 my $create_migrate_worker = sub {
     my ($nodename, $type, $vmid, $target, $with_local_disks) = @_;
 
-- 
2.20.1