[pve-devel] [PATCH qemu-server 1/6] cloudinit: add cloudinit section for current generated config.

[Alexandre Derumier]

Instead using vm pending options for pending cloudinit generated config,

write current generated cloudinit config in a new [special:cloudinit] SECTION.

Currently, some options like vm name, nic mac address can be hotplugged,
so they are not way to know if the cloud-init disk is already updated.
---
 PVE/QemuServer.pm           | 23 ++++++++++++++++++-----
 PVE/QemuServer/Cloudinit.pm | 32 ++++++++++++++++++++++++++++++++
 2 files changed, 50 insertions(+), 5 deletions(-)

diff --git a/PVE/QemuServer.pm b/PVE/QemuServer.pm
index 57cfe62..a270104 100644
--- a/PVE/QemuServer.pm
+++ b/PVE/QemuServer.pm
@@ -1875,6 +1875,7 @@ sub vmconfig_register_unused_drive {
     if (drive_is_cloudinit($drive)) {
 	eval { PVE::Storage::vdisk_free($storecfg, $drive->{file}) };
 	warn $@ if $@;
+	delete $conf->{cloudinit};
     } elsif (!drive_is_cdrom($drive)) {
 	my $volid = $drive->{file};
 	if (vm_is_volid_owner($storecfg, $vmid, $volid)) {
@@ -2135,6 +2136,7 @@ sub parse_vm_config {
 	digest => Digest::SHA::sha1_hex($raw),
 	snapshots => {},
 	pending => {},
+	cloudinit => {},
     };
 
     $filename =~ m|/qemu-server/(\d+)\.conf$|
@@ -2159,6 +2161,11 @@ sub parse_vm_config {
 	    $descr = undef;
 	    $conf = $res->{$section} = {};
 	    next;
+	} elsif ($line =~ m/^\[special:cloudinit\]\s*$/i) {
+	    $section = 'cloudinit';
+	    $descr = undef;
+	    $conf = $res->{$section} = {};
+	    next;
 
 	} elsif ($line =~ m/^\[([a-z][a-z0-9_\-]+)\]\s*$/i) {
 	    $section = $1;
@@ -2219,7 +2226,6 @@ sub parse_vm_config {
 	    warn "vm $vmid - unable to parse config: $line\n";
 	}
     }
-
     if (defined($descr)) {
 	$descr =~ s/\s+$//;
 	$conf->{description} = $descr;
@@ -2256,7 +2262,7 @@ sub write_vm_config {
 
 	foreach my $key (keys %$cref) {
 	    next if $key eq 'digest' || $key eq 'description' || $key eq 'snapshots' ||
-		$key eq 'snapstate' || $key eq 'pending';
+		$key eq 'snapstate' || $key eq 'pending' || $key eq 'cloudinit';
 	    my $value = $cref->{$key};
 	    if ($key eq 'delete') {
 		die "propertry 'delete' is only allowed in [PENDING]\n"
@@ -2280,8 +2286,10 @@ sub write_vm_config {
 
     &$cleanup_config($conf->{pending}, 1);
 
+    &$cleanup_config($conf->{cloudinit}, 1);
+
     foreach my $snapname (keys %{$conf->{snapshots}}) {
-	die "internal error: snapshot name '$snapname' is forbidden" if lc($snapname) eq 'pending';
+	die "internal error: snapshot name '$snapname' is forbidden" if lc($snapname) =~ m/^(pending|cloudinit)$/; 
 	&$cleanup_config($conf->{snapshots}->{$snapname}, undef, $snapname);
     }
 
@@ -2310,7 +2318,7 @@ sub write_vm_config {
 	}
 
 	foreach my $key (sort keys %$conf) {
-	    next if $key =~ /^(digest|description|pending|snapshots)$/;
+	    next if $key =~ /^(digest|description|pending|cloudinit|snapshots)$/;
 	    $raw .= "$key: $conf->{$key}\n";
 	}
 	return $raw;
@@ -2323,6 +2331,11 @@ sub write_vm_config {
 	$raw .= &$generate_raw_config($conf->{pending}, 1);
     }
 
+    if (scalar(keys %{$conf->{cloudinit}})){
+	$raw .= "\n[special:cloudinit]\n";
+	$raw .= &$generate_raw_config($conf->{cloudinit}, 1);
+    }
+
     foreach my $snapname (sort keys %{$conf->{snapshots}}) {
 	$raw .= "\n[$snapname]\n";
 	$raw .= &$generate_raw_config($conf->{snapshots}->{$snapname});
@@ -4702,9 +4715,9 @@ sub vmconfig_apply_pending {
 	    $conf->{$opt} = delete $conf->{pending}->{$opt};
 	}
     }
-
     # write all changes at once to avoid unnecessary i/o
     PVE::QemuConfig->write_config($vmid, $conf);
+
 }
 
 sub vmconfig_update_net {
diff --git a/PVE/QemuServer/Cloudinit.pm b/PVE/QemuServer/Cloudinit.pm
index c464bf3..f4bf925 100644
--- a/PVE/QemuServer/Cloudinit.pm
+++ b/PVE/QemuServer/Cloudinit.pm
@@ -570,6 +570,38 @@ sub generate_cloudinitconfig {
 
 	$generator->($conf, $vmid, $drive, $volname, $storeid);
     });
+
+    my $cloudinitconf = delete $conf->{cloudinit};
+    $cloudinitconf = {};
+
+    my @cloudinit_opts = keys %{PVE::QemuServer::cloudinit_config_properties()};
+    push @cloudinit_opts, 'name';
+
+    foreach my $opt (@cloudinit_opts) {
+
+	if ($opt =~ m/^ipconfig(\d+)/) {
+	    my $netid = "net$1";
+	    next if !defined($conf->{$netid});
+	    $conf->{cloudinit}->{$netid} = $conf->{$netid};
+	} 
+
+	$conf->{cloudinit}->{$opt} = $conf->{$opt} if $conf->{$opt}; 
+    }
+
+    $conf->{cloudinit}->{name} = "VM$vmid" if !$conf->{cloudinit}->{name};
+
+    foreach my $opt (keys %{$conf}) {
+	if (PVE::QemuServer::is_valid_drivename($opt)) {
+	    my $drive = PVE::QemuServer::parse_drive($opt, $conf->{$opt});
+	    if (PVE::QemuServer::drive_is_cloudinit($drive)) {
+		$conf->{cloudinit}->{$opt} = $conf->{$opt};
+
+	    }
+	}
+    }
+
+    PVE::QemuConfig->write_config($vmid, $conf);
+
 }
 
 sub dump_cloudinit_config {
-- 
2.20.1