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pvestatd: cgroupv2 support

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This uses the newly introduced PVE::LXC::CGroup's
cpuset_controller_path() method to find the controller path,
so we need to depend on the newer pve-container package.

Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
This commit is contained in:
Wolfgang Bumiller 2020-04-03 16:37:41 +02:00 committed by Thomas Lamprecht
parent 5643ac475c
commit eacb5482e5
1 changed files with 31 additions and 11 deletions
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42
PVE/Service/pvestatd.pm
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@ -20,6 +20,7 @@ use PVE::Storage;
use PVE::QemuServer;
use PVE::QemuServer::Monitor;
use PVE::LXC;
use PVE::LXC::CGroup;
use PVE::LXC::Config;
use PVE::RPCEnvironment;
use PVE::API2::Subscription;
@ -252,11 +253,18 @@ sub remove_stale_lxc_consoles {
my $rebalance_error_count = {};
my $NO_REBALANCE;
sub rebalance_lxc_containers {
# Make sure we can find the cpuset controller path:
return if $NO_REBALANCE;
my $cpuset_base = eval { PVE::LXC::CGroup::cpuset_controller_path() };
if (!defined($cpuset_base)) {
$NO_REBALANCE = 1;
return;
}
return if !-d '/sys/fs/cgroup/cpuset/lxc'; # nothing to do...
my $all_cpus = PVE::CpuSet->new_from_cgroup('lxc', 'effective_cpus');
# Figure out the cpu count & highest ID
my $all_cpus = PVE::CpuSet->new_from_path($cpuset_base, 1);
my @allowed_cpus = $all_cpus->members();
my $cpucount = scalar(@allowed_cpus);
my $max_cpuid = $allowed_cpus[-1];
@ -264,6 +272,10 @@ sub rebalance_lxc_containers {
my @cpu_ctcount = (0) x ($max_cpuid+1);
my @balanced_cts;
# A mapping { vmid => cgroup_payload_path } for containers where namespace
# separation is active and recognized.
my $ctinfo = {};
my $modify_cpuset = sub {
my ($vmid, $cpuset, $newset) = @_;
@ -273,25 +285,26 @@ sub rebalance_lxc_containers {
}
eval {
my $cgbase = $ctinfo->{$vmid};
if (-d "/sys/fs/cgroup/cpuset/lxc/$vmid/ns") {
if (defined($cgbase)) {
# allow all, so that we can set new cpuset in /ns
$all_cpus->write_to_cgroup("lxc/$vmid");
$all_cpus->write_to_path($cgbase);
eval {
$newset->write_to_cgroup("lxc/$vmid/ns");
$newset->write_to_path("$cgbase/ns");
};
if (my $err = $@) {
warn $err if !$rebalance_error_count->{$vmid}++;
# restore original
$cpuset->write_to_cgroup("lxc/$vmid");
$cpuset->write_to_path($cgbase);
} else {
# also apply to container root cgroup
$newset->write_to_cgroup("lxc/$vmid");
$newset->write_to_path($cgbase);
$rebalance_error_count->{$vmid} = 0;
}
} else {
# old style container
$newset->write_to_cgroup("lxc/$vmid");
$newset->write_to_path($cgbase);
$rebalance_error_count->{$vmid} = 0;
}
};
@ -303,14 +316,21 @@ sub rebalance_lxc_containers {
my $ctlist = PVE::LXC::config_list();
foreach my $vmid (sort keys %$ctlist) {
next if ! -d "/sys/fs/cgroup/cpuset/lxc/$vmid";
my $cgpath = "$cpuset_base/lxc/$vmid";
if (-d "$cgpath/ns") {
$ctinfo->{$vmid} = $cgpath;
} else {
# old style container
next;
}
my ($conf, $cpuset);
eval {
$conf = PVE::LXC::Config->load_config($vmid);
$cpuset = PVE::CpuSet->new_from_cgroup("lxc/$vmid");
$cpuset = PVE::CpuSet->new_from_path($cgpath);
};
if (my $err = $@) {
warn $err;