Hi Michael,
> If you've tested that and you've seen how it breaks, could you post
> the version of systemd you are running and the error messages along
> with some config examples here so we can see them?
I'm running lxc-0.8.0-rc2 on a systemd-195 host. When I try to start a
container, I get the following error:
# lxc-start -n ubuntu
lxc-start: Invalid argument - pivot_root syscall failed
lxc-start: failed to setup pivot root
lxc-start: failed to set rootfs for 'ubuntu'
lxc-start: failed to setup the container
lxc-start: invalid sequence number 1. expected 2
lxc-start: failed to spawn 'ubuntu'
lxc-start: Device or resource busy - failed to remove cgroup
'/sys/fs/cgroup/systemd/system/lxc/ubuntu'
The container is an Ubuntu Precise, created by lxc-create. The lxc
config file and fstab are attached below, at the end of the message.
> A short term work-around is to simply remount the root tree to
> private before invoking LXC.
That work-around comes with significant side-effects for me. Running
# mount --make-rprivate /
# lxc-start -n ubuntu
gives me a working container, alright, but it also screws up my host
system real bad. The most obvious problem is that my /dev/pts directory
has disappeared, so I can no longer allocate a PTY:
# xterm
xterm: Error 32, errno 2: No such file or directory
Reason: get_pty: not enough ptys
/dev/pts is not the only mount point that's gone. I've also lost the
following other ones:
--- /tmp/old 2012-11-05 15:17:27.205674924 +0100
+++ /tmp/new 2012-11-05 15:17:42.297486250 +0100
@@ -3,21 +3,7 @@
none on /sys type sysfs (rw,relatime)
none on /dev type devtmpfs
(rw,relatime,size=206136k,nr_inodes=220097,mode=755)
none on /run type tmpfs (rw,relatime,size=206136k,mode=755)
-none on /sys/kernel/security type securityfs (rw,relatime)
/dev/disk/by-label/root on / type ext4 (rw,noatime,nodiratime,data=ordered)
none on /tmp type tmpfs (rw,relatime)
-tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev,relatime)
-none on /proc/bus/usb type usbfs (rw,relatime)
-devpts on /dev/pts type devpts
(rw,nosuid,noexec,relatime,gid=3,mode=620,ptmxmode=000)
tmpfs on /sys/fs/cgroup type tmpfs (rw,nosuid,nodev,noexec,mode=755)
-cgroup on /sys/fs/cgroup/systemd type cgroup
(rw,nosuid,nodev,noexec,relatime,release_agent=/nix/store/i1qpxmqwwn247y59lf2cpra5iw1rgvrh-systemd-195/lib/systemd/systemd-cgroups-agent,name=systemd)
-cgroup on /sys/fs/cgroup/cpuset type cgroup
(rw,nosuid,nodev,noexec,relatime,cpuset)
-cgroup on /sys/fs/cgroup/cpu,cpuacct type cgroup
(rw,nosuid,nodev,noexec,relatime,cpuacct,cpu)
-cgroup on /sys/fs/cgroup/memory type cgroup
(rw,nosuid,nodev,noexec,relatime,memory)
-cgroup on /sys/fs/cgroup/devices type cgroup
(rw,nosuid,nodev,noexec,relatime,devices)
-cgroup on /sys/fs/cgroup/freezer type cgroup
(rw,nosuid,nodev,noexec,relatime,freezer)
-cgroup on /sys/fs/cgroup/blkio type cgroup
(rw,nosuid,nodev,noexec,relatime,blkio)
-hugetlbfs on /dev/hugepages type hugetlbfs (rw,relatime)
-mqueue on /dev/mqueue type mqueue (rw,relatime)
-debugfs on /sys/kernel/debug type debugfs (rw,relatime)
/dev/sda1 on /boot type ext4 (rw,noatime,nodiratime,data=ordered)
That doesn't seem right?
Take care,
Peter
lxc.network.type = empty
lxc.utsname = ubuntu
lxc.devttydir = lxc
lxc.tty = 4
lxc.pts = 1024
lxc.rootfs = /var/lib/lxc/ubuntu/rootfs
lxc.mount = /var/lib/lxc/ubuntu/fstab
lxc.arch = i686
lxc.cap.drop = sys_module mac_admin
#lxc.pivotdir = lxc_putold
# uncomment the next line to run the container unconfined:
#lxc.aa_profile = unconfined
lxc.cgroup.devices.deny = a
# Allow any mknod (but not using the node)
lxc.cgroup.devices.allow = c *:* m
lxc.cgroup.devices.allow = b *:* m
# /dev/null and zero
lxc.cgroup.devices.allow = c 1:3 rwm
lxc.cgroup.devices.allow = c 1:5 rwm
# consoles
lxc.cgroup.devices.allow = c 5:1 rwm
lxc.cgroup.devices.allow = c 5:0 rwm
#lxc.cgroup.devices.allow = c 4:0 rwm
#lxc.cgroup.devices.allow = c 4:1 rwm
# /dev/{,u}random
lxc.cgroup.devices.allow = c 1:9 rwm
lxc.cgroup.devices.allow = c 1:8 rwm
lxc.cgroup.devices.allow = c 136:* rwm
lxc.cgroup.devices.allow = c 5:2 rwm
# rtc
lxc.cgroup.devices.allow = c 254:0 rwm
#fuse
lxc.cgroup.devices.allow = c 10:229 rwm
#tun
lxc.cgroup.devices.allow = c 10:200 rwm
#full
lxc.cgroup.devices.allow = c 1:7 rwm
#hpet
lxc.cgroup.devices.allow = c 10:228 rwm
#kvm
lxc.cgroup.devices.allow = c 10:232 rwm
proc proc proc nodev,noexec,nosuid 0 0
sysfs sys sysfs defaults 0 0
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