| 1 | package PVE::AbstractMigrate; |
| 2 | |
| 3 | use strict; |
| 4 | use warnings; |
| 5 | use POSIX qw(strftime); |
| 6 | use PVE::Tools; |
| 7 | |
| 8 | my $msg2text = sub { |
| 9 | my ($level, $msg) = @_; |
| 10 | |
| 11 | chomp $msg; |
| 12 | |
| 13 | return '' if !$msg; |
| 14 | |
| 15 | my $res = ''; |
| 16 | |
| 17 | my $tstr = strftime("%b %d %H:%M:%S", localtime); |
| 18 | |
| 19 | foreach my $line (split (/\n/, $msg)) { |
| 20 | if ($level eq 'err') { |
| 21 | $res .= "$tstr ERROR: $line\n"; |
| 22 | } else { |
| 23 | $res .= "$tstr $line\n"; |
| 24 | } |
| 25 | } |
| 26 | |
| 27 | return $res; |
| 28 | }; |
| 29 | |
| 30 | sub log { |
| 31 | my ($self, $level, $msg) = @_; |
| 32 | |
| 33 | chomp $msg; |
| 34 | |
| 35 | return if !$msg; |
| 36 | |
| 37 | print &$msg2text($level, $msg); |
| 38 | } |
| 39 | |
| 40 | sub cmd { |
| 41 | my ($self, $cmd, %param) = @_; |
| 42 | |
| 43 | my $logfunc = sub { |
| 44 | my $line = shift; |
| 45 | $self->log('info', $line); |
| 46 | }; |
| 47 | |
| 48 | $self->log('info', "# " . PVE::Tools::cmd2string($cmd)); |
| 49 | |
| 50 | PVE::Tools::run_command($cmd, %param, outfunc => $logfunc, errfunc => $logfunc); |
| 51 | } |
| 52 | |
| 53 | my $run_command_quiet_full = sub { |
| 54 | my ($self, $cmd, $logerr, %param) = @_; |
| 55 | |
| 56 | my $log = ''; |
| 57 | my $logfunc = sub { |
| 58 | my $line = shift; |
| 59 | $log .= &$msg2text('info', $line);; |
| 60 | }; |
| 61 | |
| 62 | eval { PVE::Tools::run_command($cmd, %param, outfunc => $logfunc, errfunc => $logfunc); }; |
| 63 | if (my $err = $@) { |
| 64 | $self->log('info', "# " . PVE::Tools::cmd2string($cmd)); |
| 65 | print $log; |
| 66 | if ($logerr) { |
| 67 | $self->{errors} = 1; |
| 68 | $self->log('err', $err); |
| 69 | } else { |
| 70 | die $err; |
| 71 | } |
| 72 | } |
| 73 | }; |
| 74 | |
| 75 | sub cmd_quiet { |
| 76 | my ($self, $cmd, %param) = @_; |
| 77 | return &$run_command_quiet_full($self, $cmd, 0, %param); |
| 78 | } |
| 79 | |
| 80 | sub cmd_logerr { |
| 81 | my ($self, $cmd, %param) = @_; |
| 82 | return &$run_command_quiet_full($self, $cmd, 1, %param); |
| 83 | } |
| 84 | |
| 85 | my $eval_int = sub { |
| 86 | my ($self, $func, @param) = @_; |
| 87 | |
| 88 | eval { |
| 89 | local $SIG{INT} = $SIG{TERM} = $SIG{QUIT} = $SIG{HUP} = sub { |
| 90 | $self->{delayed_interrupt} = 0; |
| 91 | die "interrupted by signal\n"; |
| 92 | }; |
| 93 | local $SIG{PIPE} = sub { |
| 94 | $self->{delayed_interrupt} = 0; |
| 95 | die "interrupted by signal\n"; |
| 96 | }; |
| 97 | |
| 98 | my $di = $self->{delayed_interrupt}; |
| 99 | $self->{delayed_interrupt} = 0; |
| 100 | |
| 101 | die "interrupted by signal\n" if $di; |
| 102 | |
| 103 | &$func($self, @param); |
| 104 | }; |
| 105 | }; |
| 106 | |
| 107 | # blowfish is a fast block cipher, much faster then 3des |
| 108 | my @ssh_opts = ('-c', 'blowfish', '-o', 'BatchMode=yes'); |
| 109 | my @ssh_cmd = ('/usr/bin/ssh', @ssh_opts); |
| 110 | my @scp_cmd = ('/usr/bin/scp', @ssh_opts); |
| 111 | my @rsync_opts = ('-aH', '--delete', '--numeric-ids'); |
| 112 | my @rsync_cmd = ('/usr/bin/rsync', @rsync_opts); |
| 113 | |
| 114 | sub migrate { |
| 115 | my ($class, $node, $nodeip, $vmid, $opts) = @_; |
| 116 | |
| 117 | $class = ref($class) || $class; |
| 118 | |
| 119 | my $self = { |
| 120 | delayed_interrupt => 0, |
| 121 | opts => $opts, |
| 122 | vmid => $vmid, |
| 123 | node => $node, |
| 124 | nodeip => $nodeip, |
| 125 | rsync_cmd => [ @rsync_cmd ], |
| 126 | rem_ssh => [ @ssh_cmd, "root\@$nodeip" ], |
| 127 | scp_cmd => [ @scp_cmd ], |
| 128 | }; |
| 129 | |
| 130 | $self = bless $self, $class; |
| 131 | |
| 132 | my $starttime = time(); |
| 133 | |
| 134 | local $ENV{RSYNC_RSH} = join(' ', @ssh_cmd); |
| 135 | |
| 136 | local $SIG{INT} = $SIG{TERM} = $SIG{QUIT} = $SIG{HUP} = $SIG{PIPE} = sub { |
| 137 | $self->log('err', "received interrupt - delayed"); |
| 138 | $self->{delayed_interrupt} = 1; |
| 139 | }; |
| 140 | |
| 141 | local $ENV{RSYNC_RSH} = join(' ', @ssh_cmd); |
| 142 | |
| 143 | # lock container during migration |
| 144 | eval { $self->lock_vm($self->{vmid}, sub { |
| 145 | |
| 146 | $self->{running} = 0; |
| 147 | &$eval_int($self, sub { $self->{running} = $self->prepare($self->{vmid}); }); |
| 148 | die $@ if $@; |
| 149 | |
| 150 | &$eval_int($self, sub { $self->phase1($self->{vmid}); }); |
| 151 | my $err = $@; |
| 152 | if ($err) { |
| 153 | $self->log('err', $err); |
| 154 | eval { $self->phase1_cleanup($self->{vmid}, $err); }; |
| 155 | if (my $tmperr = $@) { |
| 156 | $self->log('err', $tmperr); |
| 157 | } |
| 158 | eval { $self->final_cleanup($self->{vmid}); }; |
| 159 | if (my $tmperr = $@) { |
| 160 | $self->log('err', $tmperr); |
| 161 | } |
| 162 | die $err; |
| 163 | } |
| 164 | |
| 165 | # vm is now owned by other node |
| 166 | # Note: there is no VM config file on the local node anymore |
| 167 | |
| 168 | if ($self->{running}) { |
| 169 | |
| 170 | &$eval_int($self, sub { $self->phase2($self->{vmid}); }); |
| 171 | my $phase2err = $@; |
| 172 | if ($phase2err) { |
| 173 | $self->{errors} = 1; |
| 174 | $self->log('err', "online migrate failure - $phase2err"); |
| 175 | } |
| 176 | eval { $self->phase2_cleanup($self->{vmid}, $phase2err); }; |
| 177 | if (my $err = $@) { |
| 178 | $self->log('err', $err); |
| 179 | $self->{errors} = 1; |
| 180 | } |
| 181 | } |
| 182 | |
| 183 | # phase3 (finalize) |
| 184 | &$eval_int($self, sub { $self->phase3($self->{vmid}); }); |
| 185 | my $phase3err = $@; |
| 186 | if ($phase3err) { |
| 187 | $self->log('err', $phase3err); |
| 188 | $self->{errors} = 1; |
| 189 | } |
| 190 | eval { $self->phase3_cleanup($self->{vmid}, $phase3err); }; |
| 191 | if (my $err = $@) { |
| 192 | $self->log('err', $err); |
| 193 | $self->{errors} = 1; |
| 194 | } |
| 195 | eval { $self->final_cleanup($self->{vmid}); }; |
| 196 | if (my $err = $@) { |
| 197 | $self->log('err', $err); |
| 198 | $self->{errors} = 1; |
| 199 | } |
| 200 | })}; |
| 201 | |
| 202 | my $err = $@; |
| 203 | |
| 204 | my $delay = time() - $starttime; |
| 205 | my $mins = int($delay/60); |
| 206 | my $secs = $delay - $mins*60; |
| 207 | my $hours = int($mins/60); |
| 208 | $mins = $mins - $hours*60; |
| 209 | |
| 210 | my $duration = sprintf "%02d:%02d:%02d", $hours, $mins, $secs; |
| 211 | |
| 212 | if ($err) { |
| 213 | $self->log('err', "migration aborted (duration $duration): $err"); |
| 214 | die "migration aborted\n"; |
| 215 | } |
| 216 | |
| 217 | if ($self->{errors}) { |
| 218 | $self->log('err', "migration finished with problems (duration $duration)"); |
| 219 | die "migration problems\n" |
| 220 | } |
| 221 | |
| 222 | $self->log('info', "migration finished successfuly (duration $duration)"); |
| 223 | } |
| 224 | |
| 225 | sub lock_vm { |
| 226 | my ($self, $vmid, $code, @param) = @_; |
| 227 | |
| 228 | die "abstract method - implement me"; |
| 229 | } |
| 230 | |
| 231 | sub prepare { |
| 232 | my ($self, $vmid) = @_; |
| 233 | |
| 234 | die "abstract method - implement me"; |
| 235 | |
| 236 | # return $running; |
| 237 | } |
| 238 | |
| 239 | # transfer all data and move VM config files |
| 240 | sub phase1 { |
| 241 | my ($self, $vmid) = @_; |
| 242 | die "abstract method - implement me"; |
| 243 | } |
| 244 | |
| 245 | # only called if there are errors in phase1 |
| 246 | sub phase1_cleanup { |
| 247 | my ($self, $vmid, $err) = @_; |
| 248 | die "abstract method - implement me"; |
| 249 | } |
| 250 | |
| 251 | # only called when VM is running and phase1 was successful |
| 252 | sub phase2 { |
| 253 | my ($self, $vmid) = @_; |
| 254 | die "abstract method - implement me"; |
| 255 | } |
| 256 | |
| 257 | # only called when VM is running and phase1 was successful |
| 258 | sub phase2_cleanup { |
| 259 | my ($self, $vmid, $err) = @_; |
| 260 | }; |
| 261 | |
| 262 | # only called when phase1 was successful |
| 263 | sub phase3 { |
| 264 | my ($self, $vmid) = @_; |
| 265 | } |
| 266 | |
| 267 | # only called when phase1 was successful |
| 268 | sub phase3_cleanup { |
| 269 | my ($self, $vmid, $err) = @_; |
| 270 | } |
| 271 | |
| 272 | # final cleanup - always called |
| 273 | sub final_cleanup { |
| 274 | my ($self, $vmid) = @_; |
| 275 | die "abstract method - implement me"; |
| 276 | } |
| 277 | |
| 278 | 1; |