add offline migration code

diff --git a/src/PVE/API2/LXC.pm b/src/PVE/API2/LXC.pm
index 7411bddac0980717539891edc0c060f678f2758c..0595e35a333d4aed62edda7caae9df2212dc8ff2 100644 (file)
--- a/src/PVE/API2/LXC.pm
+++ b/src/PVE/API2/LXC.pm
@@ -15,6 +15,7 @@ use PVE::RESTHandler;
 use PVE::RPCEnvironment;
 use PVE::LXC;
 use PVE::LXC::Create;
+use PVE::LXC::Migrate;
 use PVE::API2::LXC::Config;
 use PVE::API2::LXC::Status;
 use PVE::API2::LXC::Snapshot;
@@ -831,8 +832,7 @@ __PACKAGE__->register_method({
            my $realcmd = sub {
                my $upid = shift;
 
-               # fixme: implement lxc container migration
-               die "lxc container migration not implemented\n";
+               PVE::LXC::Migrate->migrate($target, $targetip, $vmid, $param);
 
                return;
            };

diff --git a/src/PVE/LXC/Makefile b/src/PVE/LXC/Makefile
index 3a549d3792da36d6b67ad068a4aa613f7700ee8b..f0ada85e58b24d7c68f94f2795bbae72a67dbdd1 100644 (file)
--- a/src/PVE/LXC/Makefile
+++ b/src/PVE/LXC/Makefile
@@ -1,4 +1,4 @@
-SOURCES=Setup.pm Create.pm
+SOURCES=Setup.pm Create.pm Migrate.pm
 
 .PHONY: install
 install: ${SOURCES} 

diff --git a/src/PVE/LXC/Migrate.pm b/src/PVE/LXC/Migrate.pm
new file mode 100644 (file)
index 0000000..771174e
--- /dev/null
+++ b/src/PVE/LXC/Migrate.pm
@@ -0,0 +1,164 @@
+package PVE::LXC::Migrate;
+
+use strict;
+use warnings;
+use PVE::AbstractMigrate;
+use File::Basename;
+use File::Copy; # fixme: remove
+use PVE::Tools;
+use PVE::INotify;
+use PVE::Cluster;
+use PVE::Storage;
+use PVE::LXC;
+
+use base qw(PVE::AbstractMigrate);
+
+sub lock_vm {
+    my ($self, $vmid, $code, @param) = @_;
+
+    return PVE::LXC::lock_container($vmid, undef, $code, @param);
+}
+
+sub prepare {
+    my ($self, $vmid) = @_;
+
+    my $online = $self->{opts}->{online};
+
+    $self->{storecfg} = PVE::Storage::config();
+
+    # test is VM exist
+    my $conf = $self->{vmconf} = PVE::LXC::load_config($vmid);
+
+    PVE::LXC::check_lock($conf);
+
+    my $running = 0;
+    if (PVE::LXC::check_running($vmid)) {
+       die "lxc live migration is currently not implemented\n";
+
+       die "cant migrate running container without --online\n" if !$online;
+       $running = 1;
+    }
+
+    PVE::LXC::foreach_mountpoint($conf, sub {
+       my ($ms, $mountpoint) = @_;
+
+       my $volid = $mountpoint->{volume};
+       my ($storage, $volname) = PVE::Storage::parse_volume_id($volid, 1) if $volid;
+       die "can't determine assigned storage for mountpoint '$ms'\n" if !$storage;
+
+       # check if storage is available on both nodes
+       my $scfg = PVE::Storage::storage_check_node($self->{storecfg}, $storage);
+       PVE::Storage::storage_check_node($self->{storecfg}, $storage, $self->{node});
+
+       die "unable to migrate local mountpoint '$volid' while CT is running"
+           if !$scfg->{shared};
+
+    });
+
+    my $volid_list = PVE::LXC::get_vm_volumes($conf);
+    PVE::Storage::activate_volumes($self->{storecfg}, $volid_list);
+
+    # todo: test if VM uses local resources
+
+    # test ssh connection
+    my $cmd = [ @{$self->{rem_ssh}}, '/bin/true' ];
+    eval { $self->cmd_quiet($cmd); };
+    die "Can't connect to destination address using public key\n" if $@;
+
+    return $running;
+}
+
+sub phase1 {
+    my ($self, $vmid) = @_;
+
+    $self->log('info', "starting migration of CT $self->{vmid} to node '$self->{node}' ($self->{nodeip})");
+
+    my $conf = $self->{vmconf};
+    $conf->{lock} = 'migrate';
+    PVE::LXC::write_config($vmid, $conf);
+
+    if ($self->{running}) {
+       $self->log('info', "container is running - using online migration");
+    }
+
+    $self->{volumes} = [];
+
+    PVE::LXC::foreach_mountpoint($conf, sub {
+       my ($ms, $mountpoint) = @_;
+
+       my $volid = $mountpoint->{volume};
+       my ($storage, $volname) = PVE::Storage::parse_volume_id($volid);
+       my $scfg = PVE::Storage::storage_check_node($self->{storecfg}, $storage);
+
+       if (!$scfg->{shared}) {
+
+           $self->log('info', "copy mointpoint '$ms' ($volid) to node ' $self->{node}'");
+           PVE::Storage::storage_migrate($self->{storecfg}, $volid, $self->{nodeip}, $storage);
+           push @{$self->{volumes}}, $volid;
+       } else {
+           $self->log('info', "mointpoint '$ms' is on shared storage '$storage'");
+       }
+    });
+
+    my $conffile = PVE::OpenVZ::config_file($vmid);
+    my $newconffile = PVE::OpenVZ::config_file($vmid, $self->{node});
+
+    if ($self->{running}) {
+       die "implement me";
+    }
+
+    # make sure everything on (shared) storage is unmounted
+    # Note: we must be 100% sure, else we get data corruption because
+    # non-shared file system could be mounted twice (on shared storage)
+
+    PVE::LXC::umount_all($vmid, $self->{storecfg}, $conf);
+
+    # move config
+    die "Failed to move config to node '$self->{node}' - rename failed: $!\n"
+       if !rename($conffile, $newconffile);
+}
+
+sub phase1_cleanup {
+    my ($self, $vmid, $err) = @_;
+
+    $self->log('info', "aborting phase 1 - cleanup resources");
+
+    if ($self->{volumes}) {
+       foreach my $volid (@{$self->{volumes}}) {
+           $self->log('err', "found stale volume copy '$volid' on node '$self->{node}'");
+           # fixme: try to remove ?
+       }
+    }
+}
+
+sub phase3 {
+    my ($self, $vmid) = @_;
+
+    my $volids = $self->{volumes};
+
+    # destroy local copies
+    foreach my $volid (@$volids) {
+       eval { PVE::Storage::vdisk_free($self->{storecfg}, $volid); };
+       if (my $err = $@) {
+           $self->log('err', "removing local copy of '$volid' failed - $err");
+           $self->{errors} = 1;
+           last if $err =~ /^interrupted by signal$/;
+       }
+    }
+}
+
+sub final_cleanup {
+    my ($self, $vmid) = @_;
+
+    $self->log('info', "start final cleanup");
+
+    my $conf = $self->{vmconf};
+    delete $conf->{lock};
+
+    eval { PVE::LXC::write_config($vmid, $conf); };
+    if (my $err = $@) {
+       $self->log('err', $err);
+    }
+}
+
+1;