use File::Path;
use File::Spec;
use Cwd qw();
-use Fcntl qw(O_RDONLY O_NOFOLLOW O_DIRECTORY);
-use Errno qw(ELOOP ENOTDIR EROFS ECONNREFUSED);
+use Fcntl qw(O_RDONLY O_WRONLY O_NOFOLLOW O_DIRECTORY);
+use Errno qw(ELOOP ENOTDIR EROFS ECONNREFUSED ENOSYS EEXIST);
use IO::Socket::UNIX;
use PVE::Exception qw(raise_perm_exc);
use PVE::SafeSyslog;
use PVE::INotify;
use PVE::JSONSchema qw(get_standard_option);
-use PVE::Tools qw($IPV6RE $IPV4RE dir_glob_foreach lock_file lock_file_full O_PATH);
+use PVE::Tools qw(
+ run_command
+ dir_glob_foreach
+ file_get_contents
+ file_set_contents
+ AT_FDCWD
+ O_PATH
+ $IPV4RE
+ $IPV6RE
+);
use PVE::CpuSet;
use PVE::Network;
use PVE::AccessControl;
use PVE::ProcFSTools;
-use PVE::Syscall;
+use PVE::RESTEnvironment;
+use PVE::Syscall qw(:fsmount);
use PVE::LXC::Config;
-use PVE::GuestHelpers;
+use PVE::GuestHelpers qw(safe_string_ne safe_num_ne safe_boolean_ne);
+use PVE::LXC::Tools;
+use PVE::LXC::CGroup;
+use PVE::LXC::Monitor;
+use PVE::CGroup;
use Time::HiRes qw (gettimeofday);
+my $have_sdn;
+eval {
+ require PVE::Network::SDN::Zones;
+ $have_sdn = 1;
+};
my $LXC_CONFIG_PATH = '/usr/share/lxc/config';
my $cpuinfo= PVE::ProcFSTools::read_cpuinfo();
+our $NEW_DISK_RE = qr/^([^:\s]+):(\d+(\.\d+)?)$/;
+
sub config_list {
my $vmlist = PVE::Cluster::get_vmlist();
my $res = {};
return $res;
}
-sub destroy_config {
- my ($vmid) = @_;
-
- my $config_fn = PVE::LXC::Config->config_file($vmid, $nodename);
- unlink $config_fn or die "failed to remove config file: $!\n";
-}
-
# container status helpers
sub list_active_containers {
my $last_proc_vmid_stat;
-my $parse_cpuacct_stat = sub {
- my ($vmid, $unprivileged) = @_;
-
- my $raw = read_cgroup_value('cpuacct', $vmid, $unprivileged, 'cpuacct.stat', 1);
-
- my $stat = {};
-
- if ($raw =~ m/^user (\d+)\nsystem (\d+)\n/) {
-
- $stat->{utime} = $1;
- $stat->{stime} = $2;
-
- }
-
- return $stat;
-};
-
our $vmstatus_return_properties = {
vmid => get_standard_option('pve-vmid'),
status => {
description => "The current config lock, if any.",
type => 'string',
optional => 1,
+ },
+ tags => {
+ description => "The current configured tags, if any.",
+ type => 'string',
+ optional => 1,
}
};
sub vmstatus {
my ($opt_vmid) = @_;
- my $list = $opt_vmid ? { $opt_vmid => { type => 'lxc', vmid => $opt_vmid }} : config_list();
+ my $list = $opt_vmid ? { $opt_vmid => { type => 'lxc', vmid => int($opt_vmid) }} : config_list();
my $active_hash = list_active_containers();
foreach my $vmid (keys %$list) {
my $d = $list->{$vmid};
- eval { $d->{pid} = find_lxc_pid($vmid) if defined($active_hash->{$vmid}); };
+ eval { $d->{pid} = int(find_lxc_pid($vmid)) if defined($active_hash->{$vmid}); };
warn $@ if $@; # ignore errors (consider them stopped)
$d->{status} = $active_hash->{$vmid} ? 'running' : 'stopped';
$d->{cpus} = $conf->{cores} || $conf->{cpulimit};
$d->{cpus} = $cpucount if !$d->{cpus};
- $d->{lock} = $conf->{lock} || '';
+ $d->{tags} = $conf->{tags} if defined($conf->{tags});
if ($d->{pid}) {
my $res = get_container_disk_usage($vmid, $d->{pid});
- $d->{disk} = $res->{used};
- $d->{maxdisk} = $res->{total};
+ $d->{disk} = int($res->{used});
+ $d->{maxdisk} = int($res->{total});
} else {
$d->{disk} = 0;
# use 4GB by default ??
if (my $rootfs = $conf->{rootfs}) {
- my $rootinfo = PVE::LXC::Config->parse_ct_rootfs($rootfs);
+ my $rootinfo = PVE::LXC::Config->parse_volume('rootfs', $rootfs);
$d->{maxdisk} = $rootinfo->{size} || (4*1024*1024*1024);
} else {
$d->{maxdisk} = 4*1024*1024*1024;
$d->{diskread} = 0;
$d->{diskwrite} = 0;
- $d->{template} = PVE::LXC::Config->is_template($conf);
+ $d->{template} = 1 if PVE::LXC::Config->is_template($conf);
$d->{lock} = $conf->{lock} if $conf->{lock};
}
my $unpriv = $unprivileged->{$vmid};
- if (-d '/sys/fs/cgroup/memory') {
- my $memory_stat = read_cgroup_list('memory', $vmid, $unpriv, 'memory.stat');
- my $mem_usage_in_bytes = read_cgroup_value('memory', $vmid, $unpriv, 'memory.usage_in_bytes');
+ my $cgroups = PVE::LXC::CGroup->new($vmid);
- $d->{mem} = $mem_usage_in_bytes - $memory_stat->{total_cache};
- $d->{swap} = read_cgroup_value('memory', $vmid, $unpriv, 'memory.memsw.usage_in_bytes') - $mem_usage_in_bytes;
+ if (defined(my $mem = $cgroups->get_memory_stat())) {
+ $d->{mem} = int($mem->{mem});
+ $d->{swap} = int($mem->{swap});
} else {
$d->{mem} = 0;
$d->{swap} = 0;
}
- if (-d '/sys/fs/cgroup/blkio') {
- my $blkio_bytes = read_cgroup_value('blkio', $vmid, 0, 'blkio.throttle.io_service_bytes', 1); # don't check if unpriv
- my @bytes = split(/\n/, $blkio_bytes);
- foreach my $byte (@bytes) {
- if (my ($key, $value) = $byte =~ /(Read|Write)\s+(\d+)/) {
- $d->{diskread} += $2 if $key eq 'Read';
- $d->{diskwrite} += $2 if $key eq 'Write';
- }
- }
+ if (defined(my $blkio = $cgroups->get_io_stats())) {
+ $d->{diskread} = int($blkio->{diskread});
+ $d->{diskwrite} = int($blkio->{diskwrite});
} else {
$d->{diskread} = 0;
$d->{diskwrite} = 0;
}
- if (-d '/sys/fs/cgroup/cpuacct') {
- my $pstat = $parse_cpuacct_stat->($vmid, $unpriv);
-
- my $used = $pstat->{utime} + $pstat->{stime};
+ if (defined(my $cpu = $cgroups->get_cpu_stat())) {
+ # Total time (in milliseconds) used up by the cpu.
+ my $used_ms = $cpu->{utime} + $cpu->{stime};
my $old = $last_proc_vmid_stat->{$vmid};
if (!$old) {
$last_proc_vmid_stat->{$vmid} = {
time => $cdtime,
- used => $used,
+ used => $used_ms,
cpu => 0,
};
next;
}
- my $dtime = ($cdtime - $old->{time}) * $cpucount * $cpuinfo->{user_hz};
-
- if ($dtime > 1000) {
- my $dutime = $used - $old->{used};
-
- $d->{cpu} = (($dutime/$dtime)* $cpucount) / $d->{cpus};
+ my $delta_ms = ($cdtime - $old->{time}) * $cpucount * 1000.0;
+ if ($delta_ms > 1000.0) {
+ my $delta_used_ms = $used_ms - $old->{used};
+ $d->{cpu} = (($delta_used_ms / $delta_ms) * $cpucount) / $d->{cpus};
$last_proc_vmid_stat->{$vmid} = {
time => $cdtime,
- used => $used,
+ used => $used_ms,
cpu => $d->{cpu},
};
} else {
return $list;
}
-sub read_cgroup_list($$$$) {
- my ($group, $vmid, $unprivileged, $name) = @_;
-
- my $content = read_cgroup_value($group, $vmid, $unprivileged, $name, 1);
-
- return { split(/\s+/, $content) };
-}
-
-sub read_cgroup_value($$$$$) {
- my ($group, $vmid, $unprivileged, $name, $full) = @_;
-
- my $nsdir = $unprivileged ? '' : 'ns/';
- my $path = "/sys/fs/cgroup/$group/lxc/$vmid/${nsdir}$name";
-
- return PVE::Tools::file_get_contents($path) if $full;
-
- return PVE::Tools::file_read_firstline($path);
-}
-
-sub write_cgroup_value {
- my ($group, $vmid, $name, $value) = @_;
-
- my $path = "/sys/fs/cgroup/$group/lxc/$vmid/$name";
- PVE::ProcFSTools::write_proc_entry($path, $value) if -e $path;
-
-}
-
sub find_lxc_console_pids {
my $res = {};
return $pid;
}
+sub open_pid_fd($) {
+ my ($pid) = @_;
+ sysopen(my $fd, "/proc/$pid", O_RDONLY | O_DIRECTORY)
+ or die "failed to open /proc/$pid pid fd\n";
+ return $fd;
+}
+
+sub open_lxc_pid {
+ my ($vmid) = @_;
+
+ # Find the pid and open:
+ my $pid = find_lxc_pid($vmid);
+ my $fd = open_pid_fd($pid);
+
+ # Verify:
+ my $pid2 = find_lxc_pid($vmid);
+
+ return () if $pid != $pid2;
+ return ($pid, $fd);
+}
+
+sub open_ppid {
+ my ($pid) = @_;
+
+ # Find the parent pid via proc and open it:
+ my $stat = PVE::ProcFSTools::read_proc_pid_stat($pid);
+ my $ppid = $stat->{ppid} // die "failed to get parent pid\n";
+
+ my $fd = open_pid_fd($ppid);
+
+ # Verify:
+ $stat = PVE::ProcFSTools::read_proc_pid_stat($pid);
+ my $ppid2 = $stat->{ppid} // die "failed to get parent pid for verification\n";
+
+ return () if $ppid != $ppid2;
+ return ($ppid, $fd);
+}
+
# Note: we cannot use Net:IP, because that only allows strict
# CIDR networks
sub parse_ipv4_cidr {
die "unable to parse ipv4 address/mask\n";
}
-sub get_cgroup_subsystems {
- my $v1 = {};
- my $v2 = 0;
- my $data = PVE::Tools::file_get_contents('/proc/self/cgroup');
- while ($data =~ /^\d+:([^:\n]*):.*$/gm) {
- my $type = $1;
- if (length($type)) {
- $v1->{$_} = 1 foreach split(/,/, $type);
- } else {
- $v2 = 1;
- }
- }
- return wantarray ? ($v1, $v2) : $v1;
-}
-
-# Currently we do not need to create seccomp profile 'files' as the only
-# choice our configuration actually allows is "with or without keyctl()",
-# so we distinguish between using lxc's "default" seccomp profile and our
-# added pve-userns.seccomp file.
+# With seccomp trap to userspace we now have the ability to optionally forward
+# certain syscalls to the "host" to handle (via our pve-lxc-syscalld daemon).
#
-# This returns a configuration line added to the raw lxc config.
+# This means that there are cases where we need to create an extra seccomp
+# profile for the container to load.
+#
+# This returns a configuration snippet added to the raw lxc config.
sub make_seccomp_config {
- my ($conf, $unprivileged, $features) = @_;
+ my ($conf, $vmid, $conf_dir, $unprivileged, $features) = @_;
# User-configured profile has precedence, note that the user's entry would
# be written 'after' this line anyway...
if (PVE::LXC::Config->has_lxc_entry($conf, 'lxc.seccomp.profile')) {
# Warn the user if this conflicts with a feature:
- if ($features->{keyctl}) {
- warn "explicitly configured lxc.seccomp.profile overrides the following settings: features:keyctl\n";
- }
+ my $warn = join(', ', grep { $features->{$_} } qw(keyctl mknod));
+ warn "explicitly configured lxc.seccomp.profile overrides the following settings: $warn\n"
+ if length($warn) > 0;
return '';
}
# well)
return '' if !$unprivileged;
+ my $rules = {
+ keyctl => ['errno 38'],
+
+ # Disable btrfs ioctrls since they don't work particularly well in user namespaces.
+ # Particularly, without the mount option to enable rmdir removing snapshots, user
+ # namespaces can create snapshots but neither `show` or `delete` them, which is quite
+ # horrible, so for now, just disable this entirely:
+ #
+ # BTRFS_IOCTL_MAGIC 0x94, _IOC type shift is 8,
+ # so `(req & 0xFF00) == 0x9400` is a btrfs ioctl and gets an EPERM
+ ioctl => ['errno 1 [1,0x9400,SCMP_CMP_MASKED_EQ,0xff00]'],
+ };
+
+ my $raw_conf = '';
+
# Unprivileged containers will get keyctl() disabled by default as a
# workaround for systemd-networkd behavior. But we have an option to
# explicitly enable it:
- return '' if $features->{keyctl};
+ if ($features->{keyctl}) {
+ delete $rules->{keyctl};
+ }
+
+ # By default, unprivileged containers cannot use `mknod` at all.
+ # Since lxc 3.2, we can use seccomp's trap to userspace feature for this,
+ # but for now this is experimental, so it has to be enabled via a feature
+ # flag.
+ # Note that we only handle block and char devices (like lxd), the rest we
+ # leave up to the kernel. We may in the future remove this if seccomp gets
+ # a way to tell the kernel to "continue" a syscall.
+ if ($features->{mknod}) {
+ my ($ok, $kernel) = PVE::ProcFSTools::check_kernel_release(5, 3);
+ if (!$ok) {
+ die "'mknod' feature requested, but kernel too old (found $kernel, required >= 5.3)\n";
+ }
- # Finally we're in an unprivileged container without `keyctl` set
- # explicitly. We have a file prepared for this:
- return "lxc.seccomp.profile = $LXC_CONFIG_PATH/pve-userns.seccomp\n";
+ $raw_conf .= "lxc.seccomp.notify.proxy = unix:/run/pve/lxc-syscalld.sock\n";
+ $raw_conf .= "lxc.seccomp.notify.cookie = $vmid\n";
+
+ $rules->{mknod} = [
+ # condition: (mode & S_IFMT) == S_IFCHR
+ 'notify [1,8192,SCMP_CMP_MASKED_EQ,61440]',
+ # condition: (mode & S_IFMT) == S_IFBLK
+ 'notify [1,24576,SCMP_CMP_MASKED_EQ,61440]',
+ ];
+ $rules->{mknodat} = [
+ # condition: (mode & S_IFMT) == S_IFCHR
+ 'notify [2,8192,SCMP_CMP_MASKED_EQ,61440]',
+ # condition: (mode & S_IFMT) == S_IFBLK
+ 'notify [2,24576,SCMP_CMP_MASKED_EQ,61440]',
+ ];
+ }
+
+ # Now build the custom seccomp rule text...
+ my $extra_rules = join("\n", map {
+ my $syscall = $_;
+ map { "$syscall $_" } $rules->{$syscall}->@*
+ } sort keys %$rules) . "\n";
+
+ return $raw_conf if $extra_rules eq "\n";
+
+ # We still have the "most common" config readily available, so don't write
+ # out that one:
+ if ($raw_conf eq '' && $extra_rules eq "keyctl errno 38\n") {
+ # we have no extra $raw_conf and use the same we had in pve 6.1:
+ return "lxc.seccomp.profile = $LXC_CONFIG_PATH/pve-userns.seccomp\n";
+ }
+
+ # Write the rule file to the container's config path:
+ my $rule_file = "$conf_dir/rules.seccomp";
+ my $rule_data = file_get_contents("$LXC_CONFIG_PATH/common.seccomp")
+ . $extra_rules;
+ file_set_contents($rule_file, $rule_data);
+ $raw_conf .= "lxc.seccomp.profile = $rule_file\n";
+
+ return $raw_conf;
}
# Since lxc-3.0.2 we can have lxc generate a profile for the container
return;
}
+ my ($lxc_major, $lxc_minor) = get_lxc_version();
+
my $raw = '';
+ if ($lxc_major >= 4) {
+ # Explicitly don't use relative directories, which is the default, but
+ # note that we do this mostly because they are only applied for *some*
+ # cgroups. Our pve-container@.service now starts lxc-start with `-F`,
+ # so we also don't need to worry about the new monitor cgroup to
+ # confuse systemd.
+ $raw .= "lxc.cgroup.relative = 0\n";
+
+ # To make things easier, let's keep our previous cgroup layout and
+ # simply move the monitor outside:
+ $raw .= "lxc.cgroup.dir.monitor = lxc.monitor/$vmid\n";
+ # cgroup namespace separation for stronger limits:
+ $raw .= "lxc.cgroup.dir.container = lxc/$vmid\n";
+ $raw .= "lxc.cgroup.dir.container.inner = ns\n";
+ }
+
die "missing 'arch' - internal error" if !$conf->{arch};
$raw .= "lxc.arch = $conf->{arch}\n";
my $ostype = $conf->{ostype} || die "missing 'ostype' - internal error";
+ File::Path::mkpath($dir);
+
my $cfgpath = '/usr/share/lxc/config';
my $inc = "$cfgpath/$ostype.common.conf";
$inc ="$cfgpath/common.conf" if !-f $inc;
my $features = PVE::LXC::Config->parse_features($conf->{features});
- $raw .= make_seccomp_config($conf, $unprivileged, $features);
+ $raw .= make_seccomp_config($conf, $vmid, $dir, $unprivileged, $features);
$raw .= make_apparmor_config($conf, $unprivileged, $features);
if ($features->{fuse}) {
$raw .= "lxc.apparmor.raw = mount fstype=fuse,\n";
$raw .= "lxc.mount.entry = /dev/fuse dev/fuse none bind,create=file 0 0\n";
}
+ if ($unprivileged && !$features->{force_rw_sys}) {
+ # unpriv. CT default to sys:rw, but that doesn't always plays well with
+ # systemd, e.g., systemd-networkd https://systemd.io/CONTAINER_INTERFACE/
+ $raw .= "lxc.mount.auto = sys:mixed\n";
+ }
+
# WARNING: DO NOT REMOVE this without making sure that loop device nodes
# cannot be exposed to the container with r/w access (cgroup perms).
# When this is enabled mounts will still remain in the monitor's namespace
# files while the container is running!
$raw .= "lxc.monitor.unshare = 1\n";
- my $cgv1 = get_cgroup_subsystems();
+ my ($cgv1, $cgv2) = PVE::CGroup::get_cgroup_controllers();
# Should we read them from /etc/subuid?
if ($unprivileged && !$custom_idmap) {
if (!PVE::LXC::Config->has_dev_console($conf)) {
$raw .= "lxc.console.path = none\n";
- $raw .= "lxc.cgroup.devices.deny = c 5:1 rwm\n" if $cgv1->{devices};
+ if ($cgv1->{devices}) {
+ $raw .= "lxc.cgroup.devices.deny = c 5:1 rwm\n";
+ } elsif (defined($cgv2)) {
+ $raw .= "lxc.cgroup2.devices.deny = c 5:1 rwm\n";
+ }
}
my $ttycount = PVE::LXC::Config->get_tty_count($conf);
my $lxcswap = int(($memory + $swap)*1024*1024);
$raw .= "lxc.cgroup.memory.memsw.limit_in_bytes = $lxcswap\n";
+ } elsif ($cgv2->{memory}) {
+ my $memory = $conf->{memory} || 512;
+ my $swap = $conf->{swap} // 0;
+
+ my $lxcmem = int($memory*1024*1024);
+ $raw .= "lxc.cgroup2.memory.max = $lxcmem\n";
+
+ my $lxcswap = int($swap*1024*1024);
+ $raw .= "lxc.cgroup2.memory.swap.max = $lxcswap\n";
}
if ($cgv1->{cpu}) {
$raw .= "lxc.cgroup.cpu.cfs_quota_us = $value\n";
}
- my $shares = $conf->{cpuunits} || 1024;
+ my $shares = PVE::CGroup::clamp_cpu_shares($conf->{cpuunits});
$raw .= "lxc.cgroup.cpu.shares = $shares\n";
+ } elsif ($cgv2->{cpu}) {
+ # See PVE::CGroup
+ if (my $cpulimit = $conf->{cpulimit}) {
+ my $value = int(100000*$cpulimit);
+ $raw .= "lxc.cgroup2.cpu.max = $value 100000\n";
+ }
+
+ if (defined(my $shares = $conf->{cpuunits})) {
+ $shares = PVE::CGroup::clamp_cpu_shares($shares);
+ $raw .= "lxc.cgroup2.cpu.weight = $shares\n";
+ }
}
die "missing 'rootfs' configuration\n"
if !defined($conf->{rootfs});
- my $mountpoint = PVE::LXC::Config->parse_ct_rootfs($conf->{rootfs});
+ my $mountpoint = PVE::LXC::Config->parse_volume('rootfs', $conf->{rootfs});
$raw .= "lxc.rootfs.path = $dir/rootfs\n";
$raw .= "lxc.net.$ind.veth.pair = veth${vmid}i${ind}\n";
$raw .= "lxc.net.$ind.hwaddr = $d->{hwaddr}\n" if defined($d->{hwaddr});
$raw .= "lxc.net.$ind.name = $d->{name}\n" if defined($d->{name});
- $raw .= "lxc.net.$ind.mtu = $d->{mtu}\n" if defined($d->{mtu});
+
+ # Keep container from starting with invalid mtu configuration
+ if (my $mtu = $d->{mtu}) {
+ my $bridge_mtu = PVE::Network::read_bridge_mtu($d->{bridge});
+ die "$k: MTU size '$mtu' is bigger than bridge MTU '$bridge_mtu'\n"
+ if ($mtu > $bridge_mtu);
+
+ $raw .= "lxc.net.$ind.mtu = $mtu\n";
+ }
+
+ # Starting with lxc 4.0, we do not patch lxc to execute our up-scripts.
+ if ($lxc_major >= 4) {
+ $raw .= "lxc.net.$ind.script.up = /usr/share/lxc/lxcnetaddbr\n";
+ }
}
- if ($cgv1->{cpuset}) {
- my $had_cpuset = 0;
- if (my $lxcconf = $conf->{lxc}) {
- foreach my $entry (@$lxcconf) {
- my ($k, $v) = @$entry;
- $had_cpuset = 1 if $k eq 'lxc.cgroup.cpuset.cpus';
- $raw .= "$k = $v\n";
- }
+ my $had_cpuset = 0;
+ if (my $lxcconf = $conf->{lxc}) {
+ foreach my $entry (@$lxcconf) {
+ my ($k, $v) = @$entry;
+ $had_cpuset = 1 if $k eq 'lxc.cgroup.cpuset.cpus' || $k eq 'lxc.cgroup2.cpuset.cpus';
+ $raw .= "$k = $v\n";
}
+ }
- my $cores = $conf->{cores};
- if (!$had_cpuset && $cores) {
- my $cpuset = eval { PVE::CpuSet->new_from_cgroup('lxc', 'effective_cpus') };
- $cpuset = PVE::CpuSet->new_from_cgroup('', 'effective_cpus') if !$cpuset;
- my @members = $cpuset->members();
- while (scalar(@members) > $cores) {
- my $randidx = int(rand(scalar(@members)));
- $cpuset->delete($members[$randidx]);
- splice(@members, $randidx, 1); # keep track of the changes
- }
- $raw .= "lxc.cgroup.cpuset.cpus = ".$cpuset->short_string()."\n";
+ my $cpuset;
+ my ($cpuset_cgroup, $cpuset_version) = eval { PVE::CGroup::cpuset_controller_path() };
+ if (defined($cpuset_cgroup)) {
+ $cpuset = eval { PVE::CpuSet->new_from_path("$cpuset_cgroup/lxc", 1) }
+ || PVE::CpuSet->new_from_path($cpuset_cgroup, 1);
+ }
+ my $cores = $conf->{cores};
+ if (!$had_cpuset && $cores && $cpuset) {
+ my @members = $cpuset->members();
+ while (scalar(@members) > $cores) {
+ my $randidx = int(rand(scalar(@members)));
+ $cpuset->delete($members[$randidx]);
+ splice(@members, $randidx, 1); # keep track of the changes
}
+ my $ver = $cpuset_version == 1 ? '' : '2';
+ $raw .= "lxc.cgroup$ver.cpuset.cpus = ".$cpuset->short_string()."\n";
}
File::Path::mkpath("$dir/rootfs");
my @list = ();
foreach my $server (PVE::Tools::split_list($nameserver_list)) {
- PVE::JSONSchema::pve_verify_ip($server);
+ PVE::LXC::Config::verify_ip_with_ll_iface($server);
push @list, $server;
}
return if PVE::LXC::Config->classify_mountpoint($volume) ne 'volume';
my ($vtype, $name, $owner) = PVE::Storage::parse_volname($storage_cfg, $volume);
- PVE::Storage::vdisk_free($storage_cfg, $volume) if $vmid == $owner;
+
+ if ($vmid == $owner) {
+ PVE::Storage::vdisk_free($storage_cfg, $volume);
+ } else {
+ warn "ignore deletion of '$volume', CT $vmid isn't the owner!\n";
+ }
}
sub destroy_lxc_container {
- my ($storage_cfg, $vmid, $conf, $replacement_conf) = @_;
+ my ($storage_cfg, $vmid, $conf, $replacement_conf, $purge_unreferenced) = @_;
- PVE::LXC::Config->foreach_mountpoint($conf, sub {
+ my $volids = {};
+ my $remove_volume = sub {
my ($ms, $mountpoint) = @_;
- delete_mountpoint_volume($storage_cfg, $vmid, $mountpoint->{volume});
- });
+
+ my $volume = $mountpoint->{volume};
+
+ return if $volids->{$volume};
+ $volids->{$volume} = 1;
+
+ delete_mountpoint_volume($storage_cfg, $vmid, $volume);
+ };
+ PVE::LXC::Config->foreach_volume_full($conf, {include_unused => 1}, $remove_volume);
+
+ PVE::LXC::Config->foreach_volume_full($conf->{pending}, {include_unused => 1}, $remove_volume);
+
+ if ($purge_unreferenced) { # also remove unreferenced disk
+ my $vmdisks = PVE::Storage::vdisk_list($storage_cfg, undef, $vmid, undef, 'rootdir');
+ PVE::Storage::foreach_volid($vmdisks, sub {
+ my ($volid, $sid, $volname, $d) = @_;
+ eval { PVE::Storage::vdisk_free($storage_cfg, $volid) };
+ warn $@ if $@;
+ });
+ }
rmdir "/var/lib/lxc/$vmid/rootfs";
unlink "/var/lib/lxc/$vmid/config";
if (defined $replacement_conf) {
PVE::LXC::Config->write_config($vmid, $replacement_conf);
} else {
- destroy_config($vmid);
+ PVE::LXC::Config->destroy_config($vmid);
}
-
- #my $cmd = ['lxc-destroy', '-n', $vmid ];
- #PVE::Tools::run_command($cmd);
}
sub vm_stop_cleanup {
my ($storage_cfg, $vmid, $conf, $keepActive) = @_;
-
- eval {
- if (!$keepActive) {
- my $vollist = PVE::LXC::Config->get_vm_volumes($conf);
- PVE::Storage::deactivate_volumes($storage_cfg, $vollist);
- }
+ return if $keepActive;
+
+ eval {
+ my $vollist = PVE::LXC::Config->get_vm_volumes($conf);
+ PVE::Storage::deactivate_volumes($storage_cfg, $vollist);
};
warn $@ if $@; # avoid errors - just warn
}
-my $safe_num_ne = sub {
- my ($a, $b) = @_;
-
- return 0 if !defined($a) && !defined($b);
- return 1 if !defined($a);
- return 1 if !defined($b);
-
- return $a != $b;
-};
-
-my $safe_string_ne = sub {
- my ($a, $b) = @_;
-
- return 0 if !defined($a) && !defined($b);
- return 1 if !defined($a);
- return 1 if !defined($b);
-
- return $a ne $b;
-};
-
sub update_net {
my ($vmid, $conf, $opt, $newnet, $netid, $rootdir) = @_;
if (my $oldnetcfg = $conf->{$opt}) {
my $oldnet = PVE::LXC::Config->parse_lxc_network($oldnetcfg);
- if (&$safe_string_ne($oldnet->{hwaddr}, $newnet->{hwaddr}) ||
- &$safe_string_ne($oldnet->{name}, $newnet->{name})) {
+ if (safe_string_ne($oldnet->{hwaddr}, $newnet->{hwaddr}) ||
+ safe_string_ne($oldnet->{name}, $newnet->{name})) {
PVE::Network::veth_delete($veth);
delete $conf->{$opt};
hotplug_net($vmid, $conf, $opt, $newnet, $netid);
} else {
- if (&$safe_string_ne($oldnet->{bridge}, $newnet->{bridge}) ||
- &$safe_num_ne($oldnet->{tag}, $newnet->{tag}) ||
- &$safe_num_ne($oldnet->{firewall}, $newnet->{firewall})) {
+ if (safe_string_ne($oldnet->{bridge}, $newnet->{bridge}) ||
+ safe_num_ne($oldnet->{tag}, $newnet->{tag}) ||
+ safe_num_ne($oldnet->{firewall}, $newnet->{firewall})
+ ) {
if ($oldnet->{bridge}) {
PVE::Network::tap_unplug($veth);
PVE::LXC::Config->write_config($vmid, $conf);
}
- PVE::Network::tap_plug($veth, $newnet->{bridge}, $newnet->{tag}, $newnet->{firewall}, $newnet->{trunks}, $newnet->{rate});
+ my ($bridge, $mac, $firewall, $rate) = $newnet->@{'bridge', 'hwaddr', 'firewall', 'rate'};
+ if ($have_sdn) {
+ PVE::Network::SDN::Zones::tap_plug(
+ $veth, $bridge, $newnet->{tag}, $firewall, $newnet->{trunks}, $rate);
+ PVE::Network::SDN::Zones::add_bridge_fdb($veth, $mac, $bridge, $firewall);
+ } else {
+ PVE::Network::tap_plug(
+ $veth, $bridge, $newnet->{tag}, $firewall, $newnet->{trunks}, $rate, { mac => $mac });
+ }
+
# This includes the rate:
foreach (qw(bridge tag firewall rate)) {
$oldnet->{$_} = $newnet->{$_} if $newnet->{$_};
}
- } elsif (&$safe_string_ne($oldnet->{rate}, $newnet->{rate})) {
+ } elsif (safe_string_ne($oldnet->{rate}, $newnet->{rate})) {
# Rate can be applied on its own but any change above needs to
# include the rate in tap_plug since OVS resets everything.
PVE::Network::tap_rate_limit($veth, $newnet->{rate});
my $vethpeer = $veth . "p";
my $eth = $newnet->{name};
- PVE::Network::veth_create($veth, $vethpeer, $newnet->{bridge}, $newnet->{hwaddr});
- PVE::Network::tap_plug($veth, $newnet->{bridge}, $newnet->{tag}, $newnet->{firewall}, $newnet->{trunks}, $newnet->{rate});
+ if ($have_sdn) {
+ PVE::Network::SDN::Zones::veth_create($veth, $vethpeer, $newnet->{bridge}, $newnet->{hwaddr});
+ PVE::Network::SDN::Zones::tap_plug($veth, $newnet->{bridge}, $newnet->{tag}, $newnet->{firewall}, $newnet->{trunks}, $newnet->{rate});
+ PVE::Network::SDN::Zones::add_bridge_fdb($veth, $newnet->{hwaddr}, $newnet->{bridge}, $newnet->{firewall});
+ } else {
+ PVE::Network::veth_create($veth, $vethpeer, $newnet->{bridge}, $newnet->{hwaddr});
+ PVE::Network::tap_plug($veth, $newnet->{bridge}, $newnet->{tag}, $newnet->{firewall}, $newnet->{trunks}, $newnet->{rate});
+ PVE::Network::add_bridge_fdb($veth, $newnet->{hwaddr}, $newnet->{firewall}); # early returns if brport has learning on
+ }
# attach peer in container
my $cmd = ['lxc-device', '-n', $vmid, 'add', $vethpeer, "$eth" ];
my $oldip = $optdata->{$ip};
my $oldgw = $optdata->{$gw};
- my $change_ip = &$safe_string_ne($oldip, $newip);
- my $change_gw = &$safe_string_ne($oldgw, $newgw);
+ my $change_ip = safe_string_ne($oldip, $newip);
+ my $change_gw = safe_string_ne($oldgw, $newgw);
return if !$change_ip && !$change_gw;
}
+my $open_namespace = sub {
+ my ($vmid, $pid, $kind) = @_;
+ sysopen my $fd, "/proc/$pid/ns/$kind", O_RDONLY
+ or die "failed to open $kind namespace of container $vmid: $!\n";
+ return $fd;
+};
+
my $enter_namespace = sub {
- my ($vmid, $pid, $which, $type) = @_;
- sysopen my $fd, "/proc/$pid/ns/$which", O_RDONLY
- or die "failed to open $which namespace of container $vmid: $!\n";
+ my ($vmid, $pid, $kind, $type) = @_;
+ my $fd = $open_namespace->($vmid, $pid, $kind);
PVE::Tools::setns(fileno($fd), $type)
- or die "failed to enter $which namespace of container $vmid: $!\n";
+ or die "failed to enter $kind namespace of container $vmid: $!\n";
close $fd;
};
+my $get_container_namespace = sub {
+ my ($vmid, $pid, $kind) = @_;
+
+ my $pidfd;
+ if (!defined($pid)) {
+ # Pin the pid while we're grabbing its stuff from /proc
+ ($pid, $pidfd) = open_lxc_pid($vmid)
+ or die "failed to open pidfd of container $vmid\'s init process\n";
+ }
+
+ return $open_namespace->($vmid, $pid, $kind);
+};
+
my $do_syncfs = sub {
my ($vmid, $pid, $socket) = @_;
my $mountdata = do { local $/ = undef; <$socket> };
close $socket;
+ my %nosyncfs = (
+ cgroup => 1,
+ cgroup2 => 1,
+ devtmpfs => 1,
+ devpts => 1,
+ 'fuse.lxcfs' => 1,
+ fusectl => 1,
+ mqueue => 1,
+ proc => 1,
+ sysfs => 1,
+ tmpfs => 1,
+ );
+
# Now sync all mountpoints...
my $mounts = PVE::ProcFSTools::parse_mounts($mountdata);
foreach my $mp (@$mounts) {
my ($what, $dir, $fs) = @$mp;
- next if $fs eq 'fuse.lxcfs';
+ next if $nosyncfs{$fs};
eval { PVE::Tools::sync_mountpoint($dir); };
warn $@ if $@;
}
my $storecfg = PVE::Storage::config();
- PVE::LXC::Config->foreach_mountpoint($conf, sub {
+ PVE::LXC::Config->foreach_volume($conf, sub {
my ($ms, $mountpoint) = @_;
my $volid = $mountpoint->{volume};
if !PVE::Storage::volume_has_feature($storecfg, 'template', $volid);
});
- PVE::LXC::Config->foreach_mountpoint($conf, sub {
+ PVE::LXC::Config->foreach_volume($conf, sub {
my ($ms, $mountpoint) = @_;
my $volid = $mountpoint->{volume};
}
sub check_ct_modify_config_perm {
- my ($rpcenv, $authuser, $vmid, $pool, $newconf, $delete) = @_;
+ my ($rpcenv, $authuser, $vmid, $pool, $oldconf, $newconf, $delete, $unprivileged) = @_;
return 1 if $authuser eq 'root@pam';
+ my $storage_cfg = PVE::Storage::config();
my $check = sub {
my ($opt, $delete) = @_;
} elsif ($opt eq 'rootfs' || $opt =~ /^mp\d+$/) {
$rpcenv->check_vm_perm($authuser, $vmid, $pool, ['VM.Config.Disk']);
return if $delete;
- my $data = $opt eq 'rootfs' ? PVE::LXC::Config->parse_ct_rootfs($newconf->{$opt})
- : PVE::LXC::Config->parse_ct_mountpoint($newconf->{$opt});
+ my $data = PVE::LXC::Config->parse_volume($opt, $newconf->{$opt});
raise_perm_exc("mount point type $data->{type} is only allowed for root\@pam")
if $data->{type} ne 'volume';
+ my $volid = $data->{volume};
+ if ($volid =~ $NEW_DISK_RE) {
+ my $sid = $1;
+ $rpcenv->check($authuser, "/storage/$sid", ['Datastore.AllocateSpace']);
+ } else {
+ PVE::Storage::check_volume_access(
+ $rpcenv,
+ $authuser,
+ $storage_cfg,
+ $vmid,
+ $volid,
+ 'rootdir',
+ );
+ }
} elsif ($opt eq 'memory' || $opt eq 'swap') {
$rpcenv->check_vm_perm($authuser, $vmid, $pool, ['VM.Config.Memory']);
} elsif ($opt =~ m/^net\d+$/ || $opt eq 'nameserver' ||
$opt eq 'searchdomain' || $opt eq 'hostname') {
$rpcenv->check_vm_perm($authuser, $vmid, $pool, ['VM.Config.Network']);
} elsif ($opt eq 'features') {
- # For now this is restricted to root@pam
- raise_perm_exc("changing feature flags is only allowed for root\@pam");
+ raise_perm_exc("changing feature flags for privileged container is only allowed for root\@pam")
+ if !$unprivileged;
+
+ my $nesting_changed = 0;
+ my $other_changed = 0;
+ if (!$delete) {
+ my $features = PVE::LXC::Config->parse_features($newconf->{$opt});
+ if (defined($oldconf) && $oldconf->{$opt}) {
+ # existing container with features
+ my $old_features = PVE::LXC::Config->parse_features($oldconf->{$opt});
+ for my $feature ((keys %$old_features, keys %$features)) {
+ my $old = $old_features->{$feature} // '';
+ my $new = $features->{$feature} // '';
+ if ($old ne $new) {
+ if ($feature eq 'nesting') {
+ $nesting_changed = 1;
+ next;
+ } else {
+ $other_changed = 1;
+ last;
+ }
+ }
+ }
+ } else {
+ # new container or no features defined
+ if (scalar(keys %$features) == 1 && $features->{nesting}) {
+ $nesting_changed = 1;
+ } elsif (scalar(keys %$features) > 0) {
+ $other_changed = 1;
+ }
+ }
+ } else {
+ my $features = PVE::LXC::Config->parse_features($oldconf->{$opt});
+ if (scalar(keys %$features) == 1 && $features->{nesting}) {
+ $nesting_changed = 1;
+ } elsif (scalar(keys %$features) > 0) {
+ $other_changed = 1;
+ }
+ }
+ raise_perm_exc("changing feature flags (except nesting) is only allowed for root\@pam")
+ if $other_changed;
+ $rpcenv->check_vm_perm($authuser, $vmid, $pool, ['VM.Allocate'])
+ if $nesting_changed;
} elsif ($opt eq 'hookscript') {
# For now this is restricted to root@pam
raise_perm_exc("changing the hookscript is only allowed for root\@pam");
+ } elsif ($opt eq 'tags') {
+ my $old = $oldconf->{$opt};
+ my $new = $delete ? '' : $newconf->{$opt};
+ PVE::GuestHelpers::assert_tag_permissions($vmid, $old, $new, $rpcenv, $authuser);
} else {
$rpcenv->check_vm_perm($authuser, $vmid, $pool, ['VM.Config.Options']);
}
my $rootdir = "/var/lib/lxc/$vmid/rootfs";
my $volid_list = PVE::LXC::Config->get_vm_volumes($conf);
- PVE::LXC::Config->foreach_mountpoint_reverse($conf, sub {
+ my $res = 1;
+
+ PVE::LXC::Config->foreach_volume_full($conf, {'reverse' => 1}, sub {
my ($ms, $mountpoint) = @_;
my $volid = $mountpoint->{volume};
};
if (my $err = $@) {
if ($noerr) {
+ $res = 0;
warn $err;
} else {
die $err;
}
}
});
+
+ return $res; # tell caller if (some) umounts failed for the noerr case
}
sub mount_all {
my $volid_list = PVE::LXC::Config->get_vm_volumes($conf);
PVE::Storage::activate_volumes($storage_cfg, $volid_list);
+ my (undef, $rootuid, $rootgid) = parse_id_maps($conf);
+
eval {
- PVE::LXC::Config->foreach_mountpoint($conf, sub {
+ PVE::LXC::Config->foreach_volume($conf, sub {
my ($ms, $mountpoint) = @_;
$mountpoint->{ro} = 0 if $ignore_ro;
- mountpoint_mount($mountpoint, $rootdir, $storage_cfg);
+ mountpoint_mount($mountpoint, $rootdir, $storage_cfg, undef, $rootuid, $rootgid);
});
};
if (my $err = $@) {
# * the 2nd deepest directory (parent of the above)
# * directory name of the last directory
# So that the path $2/$3 should lead to $1 afterwards.
-sub walk_tree_nofollow($$$) {
- my ($start, $subdir, $mkdir) = @_;
-
- # splitdir() returns '' for empty components including the leading /
- my @comps = grep { length($_)>0 } File::Spec->splitdir($subdir);
+sub walk_tree_nofollow($$$;$$) {
+ my ($start, $subdir, $mkdir, $rootuid, $rootgid) = @_;
sysopen(my $fd, $start, O_PATH | O_DIRECTORY)
or die "failed to open start directory $start: $!\n";
- my $dir = $start;
+ return walk_tree_nofollow_fd($start, $fd, $subdir, $mkdir, $rootuid, $rootgid);
+}
+
+
+sub walk_tree_nofollow_fd($$$$;$$) {
+ my ($start_dirname, $start_fd, $subdir, $mkdir, $rootuid, $rootgid) = @_;
+
+ # splitdir() returns '' for empty components including the leading /
+ my @comps = grep { length($_)>0 } File::Spec->splitdir($subdir);
+
+ my $fd = $start_fd;
+ my $dir = $start_dirname;
my $last_component = undef;
my $second = $fd;
foreach my $component (@comps) {
$next = PVE::Tools::openat(fileno($fd), $component, O_NOFOLLOW | O_DIRECTORY);
die "failed to create path: $dir: $!\n" if !$next;
+
+ PVE::Tools::fchownat(fileno($next), '', $rootuid, $rootgid, PVE::Tools::AT_EMPTY_PATH)
+ if defined($rootuid) && defined($rootgid);
}
- close $second if defined($last_component);
+ close $second if defined($last_component) && $second != $start_fd;
$last_component = $component;
$second = $fd;
$fd = $next;
}
return ($fd, defined($last_component) && $second, $last_component) if wantarray;
- close $second if defined($last_component);
+ close $second if defined($last_component) && $second != $start_fd;
return $fd;
}
# from $rootdir and $mount and walk the path from $rootdir to the final
# directory to check for symlinks.
sub __mount_prepare_rootdir {
- my ($rootdir, $mount) = @_;
+ my ($rootdir, $mount, $rootuid, $rootgid) = @_;
$rootdir =~ s!/+!/!g;
$rootdir =~ s!/+$!!;
my $mount_path = "$rootdir/$mount";
- my ($mpfd, $parentfd, $last_dir) = walk_tree_nofollow($rootdir, $mount, 1);
+ my ($mpfd, $parentfd, $last_dir) = walk_tree_nofollow($rootdir, $mount, 1, $rootuid, $rootgid);
return ($rootdir, $mount_path, $mpfd, $parentfd, $last_dir);
}
# use $rootdir = undef to just return the corresponding mount path
sub mountpoint_mount {
- my ($mountpoint, $rootdir, $storage_cfg, $snapname) = @_;
+ my ($mountpoint, $rootdir, $storage_cfg, $snapname, $rootuid, $rootgid) = @_;
+ return __mountpoint_mount($mountpoint, $rootdir, $storage_cfg, $snapname, $rootuid, $rootgid, undef);
+}
+
+sub mountpoint_stage {
+ my ($mountpoint, $stage_dir, $storage_cfg, $snapname, $rootuid, $rootgid) = @_;
+ my ($path, $loop, $dev) =
+ __mountpoint_mount($mountpoint, $stage_dir, $storage_cfg, $snapname, $rootuid, $rootgid, 1);
+
+ if (!defined($path)) {
+ return undef if $! == ENOSYS;
+ die "failed to mount subvolume: $!\n";
+ }
+
+ # We clone the mount point and leave it there in order to keep them connected to eg. loop
+ # devices in case we're hotplugging (which would allow contaienrs to unmount the new mount
+ # point).
+ my $err;
+ my $fd = PVE::Tools::open_tree(&AT_FDCWD, $stage_dir, &OPEN_TREE_CLOEXEC | &OPEN_TREE_CLONE)
+ or die "open_tree() on mount point failed: $!\n";
+
+ return wantarray ? ($path, $loop, $dev, $fd) : $fd;
+}
+
+sub mountpoint_insert_staged {
+ my ($mount_fd, $rootdir_fd, $mp_dir, $opt, $rootuid, $rootgid) = @_;
+
+ if (!defined($rootdir_fd)) {
+ sysopen($rootdir_fd, '.', O_PATH | O_DIRECTORY)
+ or die "failed to open '.': $!\n";
+ }
+
+ my $dest_fd = walk_tree_nofollow_fd('/', $rootdir_fd, $mp_dir, 1, $rootuid, $rootgid);
+
+ PVE::Tools::move_mount(
+ fileno($mount_fd),
+ '',
+ fileno($dest_fd),
+ '',
+ &MOVE_MOUNT_F_EMPTY_PATH | &MOVE_MOUNT_T_EMPTY_PATH,
+ ) or die "failed to move '$opt' into container hierarchy: $!\n";
+}
+
+# Use $stage_mount, $rootdir is treated as a temporary path to "stage" the file system. The user
+# can then open a file descriptor to it which can be used with the `move_mount` syscall.
+# Note that if the kernel does not support the new mount API, this will not perform any action
+# and return `undef` with $! = ENOSYS.
+sub __mountpoint_mount {
+ my ($mountpoint, $rootdir, $storage_cfg, $snapname, $rootuid, $rootgid, $stage_mount) = @_;
+
+ if (defined($stage_mount) && !PVE::LXC::Tools::can_use_new_mount_api()) {
+ $! = ENOSYS;
+ return undef;
+ }
+
+ # When staging mount points we always mount to $rootdir directly (iow. as if `mp=/`).
+ # This is required since __mount_prepare_rootdir() will return handles to the parent directory
+ # which we use in __bindmount_verify()!
+ my $mount = $stage_mount ? '/': $mountpoint->{mp};
my $volid = $mountpoint->{volume};
- my $mount = $mountpoint->{mp};
my $type = $mountpoint->{type};
my $quota = !$snapname && !$mountpoint->{ro} && $mountpoint->{quota};
my $mounted_dev;
if (defined($rootdir)) {
($rootdir, $mount_path, $mpfd, $parentfd, $last_dir) =
- __mount_prepare_rootdir($rootdir, $mount);
+ __mount_prepare_rootdir($rootdir, $mount, $rootuid, $rootgid);
+ }
+
+ if (defined($stage_mount)) {
+ $mount_path = $rootdir;
}
my ($storage, $volname) = PVE::Storage::parse_volume_id($volid, 1);
die "unknown snapshot path for '$volid'" if !$storage && defined($snapname);
- my $optstring = '';
+ my $optlist = [];
+
+ if (my $mountopts = $mountpoint->{mountoptions}) {
+ my @opts = split(/;/, $mountpoint->{mountoptions});
+ push @$optlist, grep { PVE::LXC::Config::is_valid_mount_option($_) } @opts;
+ }
+
my $acl = $mountpoint->{acl};
if (defined($acl)) {
- $optstring .= ($acl ? 'acl' : 'noacl');
+ push @$optlist, ($acl ? 'acl' : 'noacl');
}
+
+ my $optstring = join(',', @$optlist);
my $readonly = $mountpoint->{ro};
my @extra_opts;
if ($format eq 'subvol') {
if ($mount_path) {
- if ($snapname) {
+ my (undef, $name) = PVE::Storage::parse_volname($storage_cfg, $volid);
+ if (defined($snapname)) {
+ $name .= "\@$snapname";
if ($scfg->{type} eq 'zfspool') {
- my $path_arg = $path;
- $path_arg =~ s!^/+!!;
- PVE::Tools::run_command(['mount', '-o', 'ro', @extra_opts, '-t', 'zfs', $path_arg, $mount_path]);
+ PVE::Tools::run_command(['mount', '-o', 'ro', @extra_opts, '-t', 'zfs', "$scfg->{pool}/$name", $mount_path]);
} else {
die "cannot mount subvol snapshots for storage type '$scfg->{type}'\n";
}
} else {
if (defined($acl) && $scfg->{type} eq 'zfspool') {
my $acltype = ($acl ? 'acltype=posixacl' : 'acltype=noacl');
- my (undef, $name) = PVE::Storage::parse_volname($storage_cfg, $volid);
- $name .= "\@$snapname" if defined($snapname);
PVE::Tools::run_command(['zfs', 'set', $acltype, "$scfg->{pool}/$name"]);
}
bindmount($path, $parentfd, $last_dir//$rootdir, $mount_path, $readonly, @extra_opts);
}
};
my $use_loopdev = 0;
- if ($scfg->{path}) {
- $mounted_dev = run_with_loopdev($domount, $path, $readonly);
- $use_loopdev = 1;
- } elsif ($scfg->{type} eq 'drbd' || $scfg->{type} eq 'lvm' ||
- $scfg->{type} eq 'rbd' || $scfg->{type} eq 'lvmthin') {
- $mounted_dev = $path;
- &$domount($path);
+ if ($scfg->{content}->{rootdir}) {
+ if ($scfg->{path}) {
+ $mounted_dev = run_with_loopdev($domount, $path, $readonly);
+ $use_loopdev = 1;
+ } else {
+ $mounted_dev = $path;
+ &$domount($path);
+ }
} else {
- die "unsupported storage type '$scfg->{type}'\n";
+ die "storage '$storage' does not support containers\n";
}
return wantarray ? ($path, $use_loopdev, $mounted_dev) : $path;
} else {
die "unsupported storage";
}
+sub mountpoint_hotplug :prototype($$$$$) {
+ my ($vmid, $conf, $opt, $mp, $storage_cfg) = @_;
+
+ my (undef, $rootuid, $rootgid) = PVE::LXC::parse_id_maps($conf);
+
+ # We do the rest in a fork with an unshared mount namespace, because:
+ # -) change our papparmor profile to that of /usr/bin/lxc-start
+ # -) we're now going to 'stage' # the mountpoint, then grab it, then move into the
+ # container's namespace, then mount it.
+
+ PVE::Tools::run_fork(sub {
+ # Pin the container pid longer, we also need to get its monitor/parent:
+ my ($ct_pid, $ct_pidfd) = open_lxc_pid($vmid)
+ or die "failed to open pidfd of container $vmid\'s init process\n";
+
+ my ($monitor_pid, $monitor_pidfd) = open_ppid($ct_pid)
+ or die "failed to open pidfd of container $vmid\'s monitor process\n";
+
+ my $ct_mnt_ns = $get_container_namespace->($vmid, $ct_pid, 'mnt');
+ my $monitor_mnt_ns = $get_container_namespace->($vmid, $monitor_pid, 'mnt');
+
+ # Grab a file descriptor to our apparmor label file so we can change into the 'lxc-start'
+ # profile to lower our privileges to the same level we have in the start hook:
+ sysopen(my $aa_fd, "/proc/self/attr/current", O_WRONLY)
+ or die "failed to open '/proc/self/attr/current' for writing: $!\n";
+ # But switch namespaces first, to make sure the namespace switches aren't blocked by
+ # apparmor.
+
+ # Change into the monitor's mount namespace. We "pin" the mount into the monitor's
+ # namespace for it to remain active there since the container will be able to unmount
+ # hotplugged mount points and thereby potentially free up loop devices, which is a security
+ # concern.
+ PVE::Tools::setns(fileno($monitor_mnt_ns), PVE::Tools::CLONE_NEWNS);
+ chdir('/')
+ or die "failed to change root directory within the monitor's mount namespace: $!\n";
+
+ my $dir = get_staging_mount_path($opt);
+
+ # Now switch our apparmor profile before mounting:
+ my $data = 'changeprofile /usr/bin/lxc-start';
+ if (syswrite($aa_fd, $data, length($data)) != length($data)) {
+ die "failed to change apparmor profile: $!\n";
+ }
+ # Check errors on close as well:
+ close($aa_fd)
+ or die "failed to change apparmor profile (close() failed): $!\n";
+
+ my $mount_fd = mountpoint_stage($mp, $dir, $storage_cfg, undef, $rootuid, $rootgid);
+
+ PVE::Tools::setns(fileno($ct_mnt_ns), PVE::Tools::CLONE_NEWNS);
+ chdir('/')
+ or die "failed to change root directory within the container's mount namespace: $!\n";
+
+ mountpoint_insert_staged($mount_fd, undef, $mp->{mp}, $opt, $rootuid, $rootgid);
+ });
+}
+
+# Create a directory in the mountpoint staging tempfs.
+sub get_staging_mount_path($) {
+ my ($opt) = @_;
+
+ my $target = get_staging_tempfs() . "/$opt";
+ if (!mkdir($target) && $! != EEXIST) {
+ die "failed to create directory $target: $!\n";
+ }
+
+ return $target;
+}
+
+# Mount /run/pve/mountpoints as tmpfs
+sub get_staging_tempfs() {
+ # We choose a path in /var/lib/lxc/ here because the lxc-start apparmor profile restricts most
+ # mounts to that.
+ my $target = '/var/lib/lxc/.pve-staged-mounts';
+ if (!mkdir($target)) {
+ return $target if $! == EEXIST;
+ die "failed to create directory $target: $!\n";
+ }
+
+ PVE::Tools::mount("none", $target, 'tmpfs', 0, "size=8k,mode=755")
+ or die "failed to mount $target as tmpfs: $!\n";
+
+ return $target;
+}
+
sub mkfs {
my ($dev, $rootuid, $rootgid) = @_;
- PVE::Tools::run_command(['mkfs.ext4', '-O', 'mmp',
- '-E', "root_owner=$rootuid:$rootgid",
- $dev]);
+ run_command(
+ [
+ 'mkfs.ext4',
+ '-O',
+ 'mmp',
+ '-E',
+ "root_owner=$rootuid:$rootgid",
+ $dev,
+ ],
+ outfunc => sub {
+ my $line = shift;
+ # a hack to print only the relevant stuff, i.e., the one which could help on repair
+ if ($line =~ /^(Creating filesystem|Filesystem UUID|Superblock backups|\s+\d+, \d)/) {
+ print "$line\n";
+ }
+ },
+ errfunc => sub {
+ my $line = shift;
+ print STDERR "$line\n" if $line && $line !~ /^mke2fs \d\.\d/;
+ }
+ );
}
sub format_disk {
eval {
my $do_format = 0;
- if ($scfg->{type} eq 'dir' || $scfg->{type} eq 'nfs' || $scfg->{type} eq 'cifs' ) {
- if ($size_kb > 0) {
- $volid = PVE::Storage::vdisk_alloc($storecfg, $storage, $vmid, 'raw',
- undef, $size_kb);
+ if ($scfg->{content}->{rootdir} && $scfg->{path}) {
+ if ($size_kb > 0 && !($scfg->{type} eq 'btrfs' && $scfg->{quotas})) {
+ $volid = PVE::Storage::vdisk_alloc($storecfg, $storage, $vmid, 'raw', undef, $size_kb);
$do_format = 1;
} else {
- $volid = PVE::Storage::vdisk_alloc($storecfg, $storage, $vmid, 'subvol',
- undef, 0);
+ $volid = PVE::Storage::vdisk_alloc($storecfg, $storage, $vmid, 'subvol', undef, $size_kb);
$needs_chown = 1;
}
} elsif ($scfg->{type} eq 'zfspool') {
-
- $volid = PVE::Storage::vdisk_alloc($storecfg, $storage, $vmid, 'subvol',
- undef, $size_kb);
+ $volid = PVE::Storage::vdisk_alloc($storecfg, $storage, $vmid, 'subvol', undef, $size_kb);
$needs_chown = 1;
- } elsif ($scfg->{type} eq 'drbd' || $scfg->{type} eq 'lvm' || $scfg->{type} eq 'lvmthin') {
-
- $volid = PVE::Storage::vdisk_alloc($storecfg, $storage, $vmid, 'raw', undef, $size_kb);
- $do_format = 1;
-
- } elsif ($scfg->{type} eq 'rbd') {
-
+ } elsif ($scfg->{content}->{rootdir}) {
$volid = PVE::Storage::vdisk_alloc($storecfg, $storage, $vmid, 'raw', undef, $size_kb);
$do_format = 1;
} else {
- die "unable to create containers on storage type '$scfg->{type}'\n";
+ die "content type 'rootdir' is not available or configured on storage '$storage'\n";
}
format_disk($storecfg, $volid, $rootuid, $rootgid) if $do_format;
};
return ($volid, $needs_chown);
}
-our $NEW_DISK_RE = qr/^([^:\s]+):(\d+(\.\d+)?)$/;
sub create_disks {
- my ($storecfg, $vmid, $settings, $conf) = @_;
+ my ($storecfg, $vmid, $settings, $conf, $pending) = @_;
my $vollist = [];
my (undef, $rootuid, $rootgid) = PVE::LXC::parse_id_maps($conf);
my $chown_vollist = [];
- PVE::LXC::Config->foreach_mountpoint($settings, sub {
+ PVE::LXC::Config->foreach_volume($settings, sub {
my ($ms, $mountpoint) = @_;
my $volid = $mountpoint->{volume};
push @$vollist, $volid;
$mountpoint->{volume} = $volid;
$mountpoint->{size} = $size_kb * 1024;
- $conf->{$ms} = PVE::LXC::Config->print_ct_mountpoint($mountpoint, $ms eq 'rootfs');
+ if ($pending) {
+ $conf->{pending}->{$ms} = PVE::LXC::Config->print_ct_mountpoint($mountpoint, $ms eq 'rootfs');
+ } else {
+ $conf->{$ms} = PVE::LXC::Config->print_ct_mountpoint($mountpoint, $ms eq 'rootfs');
+ }
} else {
- # use specified/existing volid/dir/device
- $conf->{$ms} = PVE::LXC::Config->print_ct_mountpoint($mountpoint, $ms eq 'rootfs');
+ # use specified/existing volid/dir/device
+ $conf->{$ms} = PVE::LXC::Config->print_ct_mountpoint($mountpoint, $ms eq 'rootfs');
}
});
# free allocated images on error
if (my $err = $@) {
destroy_disks($storecfg, $vollist);
- die $err;
+ die $err;
}
return $vollist;
}
}
};
- PVE::LXC::Config->foreach_mountpoint($conf, $update_mp);
+ PVE::LXC::Config->foreach_volume($conf, $update_mp);
return $changes;
}
sub scan_volids {
my ($cfg, $vmid) = @_;
- my $info = PVE::Storage::vdisk_list($cfg, undef, $vmid);
+ my $info = PVE::Storage::vdisk_list($cfg, undef, $vmid, undef, 'rootdir');
my $all_volumes = {};
foreach my $storeid (keys %$info) {
my $cfg = PVE::Storage::config();
- # FIXME: Remove once our RBD plugin can handle CT and VM on a single storage
- # see: https://pve.proxmox.com/pipermail/pve-devel/2018-July/032900.html
- foreach my $stor (keys %{$cfg->{ids}}) {
- delete($cfg->{ids}->{$stor}) if !$cfg->{ids}->{$stor}->{content}->{rootdir};
- }
-
print "rescan volumes...\n";
my $all_volumes = scan_volids($cfg, $vmid);
return [];
}
+my sub print_ct_stderr_log {
+ my ($vmid) = @_;
+ my $log = eval { file_get_contents("/run/pve/ct-$vmid.stderr") };
+ return if !$log;
+
+ while ($log =~ /^\h*(lxc-start:?\s+$vmid:?\s*\S+\s*)?(.*?)\h*$/gm) {
+ my $line = $2;
+ print STDERR "$line\n";
+ }
+}
+my sub print_ct_warn_log {
+ my ($vmid) = @_;
+ my $log_fn = "/run/pve/ct-$vmid.warnings";
+ my $log = eval { file_get_contents($log_fn) };
+ return if !$log;
+
+ while ($log =~ /^\h*\s*(.*?)\h*$/gm) {
+ PVE::RESTEnvironment::log_warn($1);
+ }
+ unlink $log_fn or warn "could not unlink '$log_fn' - $!\n";
+}
+
+my sub monitor_state_change($$) {
+ my ($monitor_socket, $vmid) = @_;
+ die "no monitor socket\n" if !defined($monitor_socket);
+
+ while (1) {
+ my ($type, $name, $value) = PVE::LXC::Monitor::read_lxc_message($monitor_socket);
+
+ die "monitor socket: got EOF\n" if !defined($type);
+
+ next if $name ne "$vmid" || $type ne 'STATE';
+
+ if ($value eq PVE::LXC::Monitor::STATE_STARTING) {
+ alarm(0); # don't timeout after seeing the starting state
+ } elsif ($value eq PVE::LXC::Monitor::STATE_ABORTING ||
+ $value eq PVE::LXC::Monitor::STATE_STOPPING ||
+ $value eq PVE::LXC::Monitor::STATE_STOPPED) {
+ return 0;
+ } elsif ($value eq PVE::LXC::Monitor::STATE_RUNNING) {
+ return 1;
+ } else {
+ warn "unexpected message from monitor socket - " .
+ "type: '$type' - value: '$value'\n";
+ }
+ }
+}
+my sub monitor_start($$) {
+ my ($monitor_socket, $vmid) = @_;
+
+ my $success = eval {
+ PVE::Tools::run_with_timeout(10, \&monitor_state_change, $monitor_socket, $vmid)
+ };
+ if (my $err = $@) {
+ warn "problem with monitor socket, but continuing anyway: $err\n";
+ } elsif (!$success) {
+ print_ct_stderr_log($vmid);
+ die "startup for container '$vmid' failed\n";
+ }
+}
+
sub vm_start {
- my ($vmid, $conf, $skiplock) = @_;
+ my ($vmid, $conf, $skiplock, $debug) = @_;
+
+ # apply pending changes while starting
+ if (scalar(keys %{$conf->{pending}})) {
+ my $storecfg = PVE::Storage::config();
+ PVE::LXC::Config->vmconfig_apply_pending($vmid, $conf, $storecfg);
+ PVE::LXC::Config->write_config($vmid, $conf);
+ $conf = PVE::LXC::Config->load_config($vmid); # update/reload
+ }
update_lxc_config($vmid, $conf);
close($fh);
}
- my $cmd = ['systemctl', 'start', "pve-container\@$vmid"];
+ my $storage_cfg = PVE::Storage::config();
+ my $vollist = PVE::LXC::Config->get_vm_volumes($conf);
+
+ PVE::Storage::activate_volumes($storage_cfg, $vollist);
+
+ my $monitor_socket = eval { PVE::LXC::Monitor::get_monitor_socket() };
+ warn $@ if $@;
+
+ unlink "/run/pve/ct-$vmid.stderr"; # systemd does not truncate log files
+
+ my $is_debug = $debug || (!defined($debug) && $conf->{debug});
+ my $base_unit = $is_debug ? 'pve-container-debug' : 'pve-container';
+
+ my $cmd = ['systemctl', 'start', "$base_unit\@$vmid"];
PVE::GuestHelpers::exec_hookscript($conf, $vmid, 'pre-start', 1);
- eval { PVE::Tools::run_command($cmd); };
+ eval {
+ run_command($cmd);
+
+ monitor_start($monitor_socket, $vmid) if defined($monitor_socket);
+
+ # if debug is requested, print the log it also when the start succeeded
+ print_ct_stderr_log($vmid) if $is_debug;
+
+ print_ct_warn_log($vmid); # always print warn log, if any
+ };
if (my $err = $@) {
unlink $skiplock_flag_fn;
die $err;
# This is necessary because we want the post-stop hook to have completed its
# unmount-all step, but post-stop happens after lxc puts the container into the
# STOPPED state.
+# $kill - if true it will always do an immediate hard-stop
+# $shutdown_timeout - the timeout to wait for a gracefull shutdown
+# $kill_after_timeout - if true, send a hardstop if shutdown timed out
sub vm_stop {
- my ($vmid, $kill, $shutdown_timeout) = @_;
+ my ($vmid, $kill, $shutdown_timeout, $kill_after_timeout) = @_;
# Open the container's command socket.
my $path = "\0/var/lib/lxc/$vmid/command";
if ($kill) {
push @$cmd, '--kill'; # doesn't allow timeouts
- } elsif (defined($shutdown_timeout)) {
- push @$cmd, '--timeout', $shutdown_timeout;
- # Give run_command 5 extra seconds
- $shutdown_timeout += 5;
+ } else {
+ # lxc-stop uses a default timeout
+ push @$cmd, '--nokill' if !$kill_after_timeout;
+
+ if (defined($shutdown_timeout)) {
+ push @$cmd, '--timeout', $shutdown_timeout;
+ # Give run_command 5 extra seconds
+ $shutdown_timeout += 5;
+ }
}
- eval { PVE::Tools::run_command($cmd, timeout => $shutdown_timeout) };
+ eval { run_command($cmd, timeout => $shutdown_timeout) };
if (my $err = $@) {
warn $@ if $@;
}
die "container did not stop\n";
}
+sub vm_reboot {
+ my ($vmid, $timeout, $skiplock) = @_;
+
+ PVE::LXC::Config->lock_config($vmid, sub {
+ return if !check_running($vmid);
+
+ vm_stop($vmid, 0, $timeout, 1); # kill if timeout exceeds
+
+ my $conf = PVE::LXC::Config->load_config($vmid);
+ vm_start($vmid, $conf);
+ });
+}
+
sub run_unshared {
my ($code) = @_;
# Unshare the mount namespace
die "failed to unshare mount namespace: $!\n"
if !PVE::Tools::unshare(PVE::Tools::CLONE_NEWNS);
- PVE::Tools::run_command(['mount', '--make-rslave', '/']);
+ run_command(['mount', '--make-rslave', '/']);
return $code->();
});
}
my $copy_volume = sub {
- my ($src_volid, $src, $dst_volid, $dest, $storage_cfg, $snapname, $bwlimit) = @_;
+ my ($src_volid, $src, $dst_volid, $dest, $storage_cfg, $snapname, $bwlimit, $rootuid, $rootgid) = @_;
my $src_mp = { volume => $src_volid, mp => '/', ro => 1 };
$src_mp->{type} = PVE::LXC::Config->classify_mountpoint($src_volid);
eval {
# mount and copy
mkdir $src;
- mountpoint_mount($src_mp, $src, $storage_cfg, $snapname);
+ mountpoint_mount($src_mp, $src, $storage_cfg, $snapname, $rootuid, $rootgid);
push @mounted, $src;
mkdir $dest;
- mountpoint_mount($dst_mp, $dest, $storage_cfg);
+ mountpoint_mount($dst_mp, $dest, $storage_cfg, undef, $rootuid, $rootgid);
push @mounted, $dest;
$bwlimit //= 0;
- PVE::Tools::run_command(['/usr/bin/rsync', '--stats', '-X', '-A', '--numeric-ids',
- '-aH', '--whole-file', '--sparse', '--one-file-system',
- "--bwlimit=$bwlimit", "$src/", $dest]);
+ run_command([
+ 'rsync',
+ '--stats',
+ '-X',
+ '-A',
+ '--numeric-ids',
+ '-aH',
+ '--whole-file',
+ '--sparse',
+ '--one-file-system',
+ "--bwlimit=$bwlimit",
+ "$src/",
+ $dest
+ ]);
};
my $err = $@;
+
+ # Wait for rsync's children to release dest so that
+ # consequent file operations (umount, remove) are possible
+ while ((system {"fuser"} "fuser", "-s", $dest) == 0) {sleep 1};
+
foreach my $mount (reverse @mounted) {
- eval { PVE::Tools::run_command(['/bin/umount', '--lazy', $mount], errfunc => sub{})};
+ eval { run_command(['/bin/umount', $mount], errfunc => sub{})};
warn "Can't umount $mount\n" if $@;
}
}
run_unshared(sub {
- $copy_volume->($mp->{volume}, $src, $new_volid, $dest, $storage_cfg, $snapname, $bwlimit);
+ $copy_volume->($mp->{volume}, $src, $new_volid, $dest, $storage_cfg, $snapname, $bwlimit, $rootuid, $rootgid);
});
};
if (my $err = $@) {
return $new_volid;
}
+sub get_lxc_version() {
+ my $version;
+ run_command([qw(lxc-start --version)], outfunc => sub {
+ my ($line) = @_;
+ # We only parse out major & minor version numbers.
+ if ($line =~ /^(\d+)\.(\d+)(?:\D.*)?$/) {
+ $version = [$1, $2];
+ }
+ });
+
+ die "failed to get lxc version\n" if !defined($version);
+
+ # return as a list:
+ return $version->@*;
+}
+
+sub freeze($) {
+ my ($vmid) = @_;
+ if (PVE::CGroup::cgroup_mode() == 2) {
+ PVE::LXC::Command::freeze($vmid, 30);
+ } else {
+ PVE::LXC::CGroup->new($vmid)->freeze_thaw(1);
+ }
+}
+
+sub thaw($) {
+ my ($vmid) = @_;
+ if (PVE::CGroup::cgroup_mode() == 2) {
+ PVE::LXC::Command::unfreeze($vmid, 30);
+ } else {
+ PVE::LXC::CGroup->new($vmid)->freeze_thaw(0);
+ }
+}
+
1;
projects / pve-container.git / blobdiff