[libvirt-users] error : Failed to switch root mount into slave mode: Permission denied

[Kyle Peterson]

libvirt-3.0.0

When attemping to create a virtual machine I receive the error "error : Failed to switch root mount into slave mode: Permission denied”.

I’m attempting to run qemu/libvirt/virt-manager in an Arch Linux lxc container on a Ubuntu 16.04 host.  The host uses zfs for its containers.  The arch container is set up as a priveleged container.  I do already have kvm/qemu/libvirt working in a Ubuntu container.  The reason for the arch container is because I want to try a newer version of qemu/libvirt.

I’m not finding anything on google about this error message.  Any way to get around it?

[root at arch ~]# uname -a
Linux arch 4.8.0-39-generic #42~16.04.1-Ubuntu SMP Mon Feb 20 15:06:07 UTC 2017 x86_64 GNU/Linux

[root at arch ~]# cat /proc/mounts
storage/lxd_root/containers/arch / zfs rw,noatime,xattr,posixacl 0 0
none /dev tmpfs rw,relatime,size=492k,mode=755 0 0
proc /proc proc rw,nosuid,nodev,noexec,relatime 0 0
proc /proc/sys/net proc rw,nosuid,nodev,noexec,relatime 0 0
proc /proc/sys proc ro,nosuid,nodev,noexec,relatime 0 0
proc /proc/sysrq-trigger proc ro,nosuid,nodev,noexec,relatime 0 0
sysfs /sys sysfs rw,nosuid,nodev,noexec,relatime 0 0
sysfs /sys sysfs ro,nosuid,nodev,noexec,relatime 0 0
sysfs /sys/devices/virtual/net sysfs rw,relatime 0 0
sysfs /sys/devices/virtual/net sysfs rw,nosuid,nodev,noexec,relatime 0 0
mqueue /dev/mqueue mqueue rw,relatime 0 0
udev /dev/fuse devtmpfs rw,nosuid,relatime,size=8179548k,nr_inodes=2044887,mode=755 0 0
udev /dev/net/tun devtmpfs rw,nosuid,relatime,size=8179548k,nr_inodes=2044887,mode=755 0 0
binfmt_misc /proc/sys/fs/binfmt_misc binfmt_misc rw,relatime 0 0
fusectl /sys/fs/fuse/connections fusectl rw,relatime 0 0
pstore /sys/fs/pstore pstore rw,nosuid,nodev,noexec,relatime 0 0
debugfs /sys/kernel/debug debugfs rw,relatime 0 0
securityfs /sys/kernel/security securityfs rw,nosuid,nodev,noexec,relatime 0 0
rpool/ROOT/ubuntu /dev/lxd zfs rw,relatime,xattr,noacl 0 0
rpool/ROOT/ubuntu /dev/kvm zfs rw,relatime,xattr,noacl 0 0
rpool/ROOT/ubuntu /dev/mem zfs rw,relatime,xattr,noacl 0 0
storage/downloads /mnt/downloads zfs rw,noatime,xattr,posixacl 0 0
storage/kvm_root/iso /mnt/iso zfs rw,noatime,xattr,posixacl 0 0
rpool/ROOT/ubuntu /dev/.lxd-mounts zfs rw,relatime,xattr,noacl 0 0
lxcfs /proc/cpuinfo fuse.lxcfs rw,nosuid,nodev,relatime,user_id=0,group_id=0,allow_other 0 0
lxcfs /proc/diskstats fuse.lxcfs rw,nosuid,nodev,relatime,user_id=0,group_id=0,allow_other 0 0
lxcfs /proc/meminfo fuse.lxcfs rw,nosuid,nodev,relatime,user_id=0,group_id=0,allow_other 0 0
lxcfs /proc/stat fuse.lxcfs rw,nosuid,nodev,relatime,user_id=0,group_id=0,allow_other 0 0
lxcfs /proc/swaps fuse.lxcfs rw,nosuid,nodev,relatime,user_id=0,group_id=0,allow_other 0 0
lxcfs /proc/uptime fuse.lxcfs rw,nosuid,nodev,relatime,user_id=0,group_id=0,allow_other 0 0
devpts /dev/console devpts rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000 0 0
devpts /dev/pts devpts rw,relatime,gid=5,mode=620,ptmxmode=666 0 0
tmpfs /dev/shm tmpfs rw,nosuid,nodev 0 0
tmpfs /run tmpfs rw,nosuid,nodev,mode=755 0 0
tmpfs /sys/fs/cgroup tmpfs ro,nosuid,nodev,noexec,mode=755 0 0
cgroup /sys/fs/cgroup/systemd cgroup rw,nosuid,nodev,noexec,relatime,xattr,release_agent=/lib/systemd/systemd-cgroups-agent,name=systemd 0 0
cgroup /sys/fs/cgroup/memory cgroup rw,nosuid,nodev,noexec,relatime,memory 0 0
cgroup /sys/fs/cgroup/cpu,cpuacct cgroup rw,nosuid,nodev,noexec,relatime,cpu,cpuacct 0 0
cgroup /sys/fs/cgroup/net_cls,net_prio cgroup rw,nosuid,nodev,noexec,relatime,net_cls,net_prio 0 0
cgroup /sys/fs/cgroup/cpuset cgroup rw,nosuid,nodev,noexec,relatime,cpuset 0 0
cgroup /sys/fs/cgroup/perf_event cgroup rw,nosuid,nodev,noexec,relatime,perf_event 0 0
cgroup /sys/fs/cgroup/pids cgroup rw,nosuid,nodev,noexec,relatime,pids 0 0
cgroup /sys/fs/cgroup/devices cgroup rw,nosuid,nodev,noexec,relatime,devices 0 0
cgroup /sys/fs/cgroup/blkio cgroup rw,nosuid,nodev,noexec,relatime,blkio 0 0
cgroup /sys/fs/cgroup/freezer cgroup rw,nosuid,nodev,noexec,relatime,freezer 0 0
cgroup /sys/fs/cgroup/hugetlb cgroup rw,nosuid,nodev,noexec,relatime,hugetlb 0 0
hugetlbfs /dev/hugepages hugetlbfs rw,relatime 0 0
tmpfs /tmp tmpfs rw,nosuid,nodev 0 0
tmpfs /run/user/0 tmpfs rw,nosuid,nodev,relatime,size=1646852k,mode=700 0 0