[pve-devel] [PATCH qemu-server 5/6] api2: add cloudinit_update

[Alexandre Derumier]

This allow to regenerate the config drive with 1 api call.

This also avoid to delete drive first, and recreate it again.

As it's a readonly drive, we can simply live update it,
and eject/replace it with qemu monitor
---
 PVE/API2/Qemu.pm  | 44 ++++++++++++++++++++++++++++++++++++++++++++
 PVE/CLI/qm.pm     |  3 ++-
 PVE/QemuServer.pm | 28 ++++++++++++++++++++++++++++
 3 files changed, 74 insertions(+), 1 deletion(-)

diff --git a/PVE/API2/Qemu.pm b/PVE/API2/Qemu.pm
index b6122fe..de2c378 100644
--- a/PVE/API2/Qemu.pm
+++ b/PVE/API2/Qemu.pm
@@ -1112,6 +1112,50 @@ __PACKAGE__->register_method({
 	return $res;
    }});
 
+__PACKAGE__->register_method({
+    name => 'cloudinit_update',
+    path => '{vmid}/cloudinit',
+    method => 'PUT',
+    protected => 1,
+    proxyto => 'node',
+    description => "Regenerate and change cloudinit config drive.",
+    permissions => {
+	check => ['perm', '/vms/{vmid}', 'VM.Config.Cloudinit', any => 1],
+    },
+    parameters => {
+	additionalProperties => 0,
+	properties => {
+	    node => get_standard_option('pve-node'),
+	    vmid => get_standard_option('pve-vmid'),
+	},
+    },
+    returns => { type => 'null' },
+    code => sub {
+	my ($param) = @_;
+
+	my $rpcenv = PVE::RPCEnvironment::get();
+
+	my $authuser = $rpcenv->get_user();
+
+	my $vmid = extract_param($param, 'vmid');
+
+	my $updatefn =  sub {
+
+	    my $conf = PVE::QemuConfig->load_config($vmid);
+
+	    PVE::QemuConfig->check_lock($conf);
+
+	    my $storecfg = PVE::Storage::config();
+
+	    PVE::QemuServer::vmconfig_update_cloudinit_drive($storecfg, $conf, $vmid);
+
+	};
+
+	PVE::QemuConfig->lock_config($vmid, $updatefn);
+
+	return;
+    }});
+
 # POST/PUT {vmid}/config implementation
 #
 # The original API used PUT (idempotent) an we assumed that all operations
diff --git a/PVE/CLI/qm.pm b/PVE/CLI/qm.pm
index e24b832..8d594c6 100755
--- a/PVE/CLI/qm.pm
+++ b/PVE/CLI/qm.pm
@@ -996,7 +996,8 @@ our $cmddef = {
 		my $data = shift;
 		print "$data\n";
 	    }],
-	pending => [ "PVE::API2::Qemu", 'cloudinit_pending', ['vmid'], { node => $nodename }, \&PVE::GuestHelpers::format_pending ]
+	pending => [ "PVE::API2::Qemu", 'cloudinit_pending', ['vmid'], { node => $nodename }, \&PVE::GuestHelpers::format_pending ],
+	update => [ "PVE::API2::Qemu", 'cloudinit_update', ['vmid'], { node => $nodename }],
     },
 
 };
diff --git a/PVE/QemuServer.pm b/PVE/QemuServer.pm
index bdb5066..8518f13 100644
--- a/PVE/QemuServer.pm
+++ b/PVE/QemuServer.pm
@@ -4867,6 +4867,34 @@ sub vmconfig_update_disk {
     vm_deviceplug($storecfg, $conf, $vmid, $opt, $drive, $arch, $machine_type);
 }
 
+sub vmconfig_update_cloudinit_drive {
+    my ($storecfg, $conf, $vmid) = @_;
+
+    my $cloudinit_ds = undef;
+    my $cloudinit_drive = undef;
+
+    PVE::QemuConfig->foreach_volume($conf, sub {
+	my ($ds, $drive) = @_;
+	if (PVE::QemuServer::drive_is_cloudinit($drive)) {
+	    $cloudinit_ds = $ds;
+	    $cloudinit_drive = $drive;
+	}
+    });
+
+    return if !$cloudinit_drive;
+
+    PVE::QemuServer::Cloudinit::generate_cloudinitconfig($conf, $vmid);
+    my $running = PVE::QemuServer::check_running($vmid);
+
+    if ($running) {
+	my $path = PVE::Storage::path($storecfg, $cloudinit_drive->{file});
+	if ($path) {
+	    mon_cmd($vmid, "eject", force => JSON::true, id => "$cloudinit_ds");
+	    mon_cmd($vmid, "blockdev-change-medium", id => "$cloudinit_ds", filename => "$path");
+	}
+    }
+}
+
 # called in locked context by incoming migration
 sub vm_migrate_get_nbd_disks {
     my ($storecfg, $conf, $replicated_volumes) = @_;
-- 
2.20.1