1 |
#!/usr/bin/perl -w |
2 |
|
3 |
use strict; |
4 |
use Shell qw/rsync vzlist lvcreate mount umount lvremove which lvdisplay mke2fs vzctl/; |
5 |
|
6 |
my $vz = '/vz'; |
7 |
my $conf = '/etc/vz/conf'; |
8 |
|
9 |
my $snap_size = '1G'; |
10 |
|
11 |
my ( $action, $VEID ) = @ARGV; |
12 |
|
13 |
my $use_snapshot = 1; |
14 |
|
15 |
my $valid_actions = 'create|mount|umount|destroy'; |
16 |
|
17 |
die "Usage: $0 ($valid_actions) VEID\n\n",vzlist unless $VEID && $action && $action =~ m/($valid_actions)/; |
18 |
|
19 |
my $CVEID = "10$VEID"; |
20 |
|
21 |
sub vzctl_stop { |
22 |
my $veid = shift; |
23 |
my $vzlist = vzlist(); |
24 |
if ( $vzlist =~ m/$veid/ ) { |
25 |
print "stop $veid\n"; |
26 |
vzctl('stop', $veid); |
27 |
} |
28 |
} |
29 |
|
30 |
if ( $action eq 'create' ) { |
31 |
vzctl_stop( $CVEID ); |
32 |
} elsif ( $action eq 'destroy' ) { |
33 |
vzctl_stop( $VEID ); |
34 |
} |
35 |
|
36 |
|
37 |
if ( $action =~ m{(create|umount|destroy)} ) { |
38 |
my $clone; |
39 |
my $snap; |
40 |
open(my $m, '-|', 'mount') || die "can't open mount: $!"; |
41 |
while(<$m>) { |
42 |
my @v = split(/\s+/,$_); |
43 |
if ( $v[2] =~ m{/(private|root)/($VEID|$CVEID)$} && $v[5] =~ m{bind} ) { |
44 |
umount( $v[2] ); |
45 |
} elsif ( $v[2] =~ m{vz-clone-$CVEID$} ) { |
46 |
$clone = $v[2]; |
47 |
} elsif ( $v[2] =~ m{-snap} ) { |
48 |
$snap = $v[0]; |
49 |
umount( $snap ); |
50 |
} |
51 |
} |
52 |
umount( $clone ) if $clone; |
53 |
if ( $action eq 'destroy' && -e $snap ) { |
54 |
lvremove( '-f', $snap ); |
55 |
exit; |
56 |
} |
57 |
|
58 |
exit if $action eq 'umount'; |
59 |
} |
60 |
|
61 |
|
62 |
my $orig_conf = "/etc/vz/conf/$VEID.conf"; |
63 |
|
64 |
die "$VEID config $orig_conf doesn't exist\n" unless -e $orig_conf; |
65 |
|
66 |
print "Clone VE $VEID -> $CVEID\n"; |
67 |
|
68 |
my $vz_lv; |
69 |
|
70 |
open(my $m, '<', '/etc/fstab') || die "can't open /etc/fstab: $!"; |
71 |
while(<$m>) { |
72 |
next if m/^#/; |
73 |
my @v = split(/\s+/,$_); |
74 |
if ( $v[1] =~ m/\Q$vz\E/ ) { |
75 |
$vz_lv = $v[0]; |
76 |
warn "found LV $vz_lv for $vz\n"; |
77 |
last; |
78 |
} |
79 |
} |
80 |
|
81 |
sub fs_quota { |
82 |
my $id = shift; |
83 |
open(my $q, '-|', "vzquota -b show $id") || die "can't exec vzquota show $id: $!"; |
84 |
my $l = <$q>; |
85 |
$l =~ s/^\s+//; |
86 |
my ( $usage, $soft, $hard ) = split(/\s+/,$l); |
87 |
warn "quota for $id | $soft < $hard | usage: $usage\n"; |
88 |
return ( $usage, $soft, $hard ) if wantarray; |
89 |
return $soft; |
90 |
} |
91 |
|
92 |
sub copy_files { |
93 |
my ( $from, $to ) = @_; |
94 |
return if $action ne 'create'; |
95 |
warn "rsync $from -> $to\n"; |
96 |
rsync('-raSHAD', '--delete', "$from/", "$to/" ); |
97 |
} |
98 |
|
99 |
if ( $vz_lv ) { |
100 |
|
101 |
my ( $vz_lv_path, $vz_lv_name ) = ( $1, $2 ) if ( $vz_lv =~ m{^(.+)/([^/]+)$} ); |
102 |
|
103 |
my $snap = $vz_lv_name . '-snap'; |
104 |
my $clone = "vz-clone-$CVEID"; |
105 |
|
106 |
sub do_mount { |
107 |
my ( $from, $to ) = @_; |
108 |
mkdir $to || die "can't create $to: $!"; |
109 |
print "Mounting $from to $to\n"; |
110 |
mount( $from, $to, '-o', 'noatime' ); |
111 |
} |
112 |
|
113 |
sub test_mkdir { |
114 |
my $dir = shift; |
115 |
if ( ! -d $dir ) { |
116 |
mkdir $dir || die "can't mkdir $dir: $!"; |
117 |
} |
118 |
} |
119 |
|
120 |
sub mount_bind { |
121 |
my ( $from, $to ) = @_; |
122 |
die "$from doesn't exist!" unless -d $from; |
123 |
test_mkdir( $to ); |
124 |
mount( '--bind', $from, $to ); |
125 |
} |
126 |
|
127 |
if ( $use_snapshot ) { |
128 |
|
129 |
print "Creating $snap_size snapshot $snap from $vz_lv\n"; |
130 |
lvcreate( '--size', $snap_size, '--snapshot', '--name', $snap, $vz_lv ); |
131 |
|
132 |
do_mount( "$vz_lv_path/$snap", "/tmp/$snap" ); |
133 |
|
134 |
mount_bind( "/tmp/$snap/private/$VEID", "$vz/private/$CVEID" ); |
135 |
mount_bind( "/tmp/$snap/root/$VEID", "$vz/root/$CVEID" ); |
136 |
|
137 |
} else { |
138 |
|
139 |
if ( lvdisplay( "$vz_lv_path/$clone" ) ) { |
140 |
warn "using existing $vz_lv_path/$clone\n"; |
141 |
} else { |
142 |
my $vg_name = $1 if ( $vz_lv_path =~ m{/([^/]+)/*$} ); |
143 |
my $clone_size = fs_quota( $VEID ) . 'k'; |
144 |
print "Creating LV $clone ($clone_size bytes) in VG $vg_name for $VEID clone filesystem\n"; |
145 |
lvcreate( '--size', $clone_size, '--name', $clone, $vg_name ); |
146 |
mke2fs( '-m', 0, '-j', "$vz_lv_path/$clone" ); |
147 |
} |
148 |
|
149 |
do_mount( "$vz_lv_path/$clone", "/tmp/$clone" ); |
150 |
|
151 |
test_mkdir( "/tmp/$clone/private" ); |
152 |
test_mkdir( "/tmp/$clone/root" ); |
153 |
|
154 |
copy_files( "$vz/private/$VEID", "/tmp/$clone/private" ); |
155 |
|
156 |
mount_bind( "/tmp/$clone/private", "$vz/private/$CVEID" ); |
157 |
mount_bind( "/tmp/$clone/root", "$vz/root/$CVEID" ); |
158 |
|
159 |
} |
160 |
|
161 |
} else { |
162 |
|
163 |
copy_files( "$vz/private/$VEID", "$vz/private/$CVEID" ); |
164 |
} |
165 |
|
166 |
exit if $action eq 'mount'; |
167 |
|
168 |
my $note = "# modified by $0\n"; |
169 |
|
170 |
my $ve_clone_ip; |
171 |
|
172 |
sub fix_ip { |
173 |
my $ip = shift; |
174 |
$ip =~ s/['"]//g; |
175 |
# $ip =~ s/^\d+\./10./; |
176 |
$ip =~ s/^\d+\.\d+\./192.168./; |
177 |
warn "$CVEID new IP number: $ip\n"; |
178 |
$ve_clone_ip = $ip; |
179 |
return $note . qq{IP_ADDRESS="$ip"}; |
180 |
} |
181 |
|
182 |
sub fix_hostname { |
183 |
my $hostname = shift; |
184 |
$hostname =~ s/['"]//g; |
185 |
$hostname = "clone-$hostname"; |
186 |
warn "$CVEID new hostname: $hostname\n"; |
187 |
return $note . qq{HOSTNAME="$hostname"}; |
188 |
} |
189 |
|
190 |
open(my $o, '<', "$conf/$VEID.conf") || die "can't open $conf/$VEID.conf: $!"; |
191 |
open(my $n, '>', "$conf/$CVEID.conf") || die "can't open $conf/$CVEID.conf: $!"; |
192 |
while(<$o>) { |
193 |
s{^HOSTNAME=(.*)$}{fix_hostname($1)}ie; |
194 |
s{^IP_ADDRESS=(.*)$}{fix_ip($1)}ie; |
195 |
s{^(ONBOOT=).*$}{# modified by $0\n$1"no"}i; |
196 |
print $n $_; |
197 |
} |
198 |
|
199 |
print $n qq{DISK_QUOTA="no"\n} if $use_snapshot; # don't wait for quota rebuild on startup |
200 |
|
201 |
print "\nPlease review config file: $conf/$CVEID.conf\nAdd NAT for new VE with: iptables -t nat -A POSTROUTING -s $ve_clone_ip -o eth0 -j MASQUERADE\nStart clone of $VEID with: vzctl start $CVEID\n" |
202 |
|