Running as root: strace -f -o lxc-execute.log -- lxc-execute --name test
-- echo foobar
...
3274 access("/var/lib/lxc", X_OK) = 0
3274 open("/proc/self/mountinfo", O_RDONLY) = 7
3274 fstat(7, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
3274 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0)
= 0x7fd5e4334000
3274 read(7, "74 73 8:1 / / rw,relatime - ext4"..., 1024) = 1024
3274 read(7, "release-agent.cpu\n86 83 0:25 / /"..., 1024) = 1024
3274 read(7, "odev,noexec,relatime - cgroup sy"..., 1024) = 490
3274 read(7, "", 1024) = 0
3274 close(7) = 0
3274 munmap(0x7fd5e4334000, 4096) = 0
3274 mount("", "/", NULL, MS_REC|MS_SLAVE, NULL) = 0
3274 access("echo", F_OK) = -1 ENOENT (No such file or directory)
3274 readlink("/proc/self", "3274", 20) = 4
3274 umount("/proc", MNT_DETACH) = 0
3274 open("/", O_RDONLY) = 7
========== Problem starts here? ==========
3274 openat(7, "proc", O_RDONLY|O_NOFOLLOW) = 8
3274 close(7) = 0
3274 mount("proc", "/proc/self/fd/8", "proc", 0, NULL) = -1 ENOENT (No such
file or directory)
========== Errors start to show ==========
3274 close(8) = 0
3274 write(3, " lxc-execute 1485521866.885 E"..., 138) = 138
3274 write(2, "lxc-execute: ", 13) = 13
3274 write(2, "utils.c: safe_mount: 1391 ", 26) = 26
3274 write(2, "No such file or directory - Fail"..., 59) = 59
...
I'm not sure why this mount call fails, but it may be related to
apparmor since running without it works fine, even with latest lxc
updates:
vagrant@vagrant-ubuntu-trusty-64:~$ sudo lxc-execute --name test --define
lxc.aa_profile=unconfined echo foobar
lxc-execute: utils.c: safe_mount: 1391 No such file or directory - Failed to
mount proc onto /proc
lxc-execute: conf.c: tmp_proc_mount: 4132 No such file or directory - failed to
mount /proc in the container.
lxc-execute: lsm/apparmor.c: apparmor_process_label_get: 80 No such file or
directory - opening /proc/1/attr/current
lxc-execute: lsm/apparmor.c: apparmor_process_label_get: 80 No such file or
directory - opening /proc/1/attr/current
foobar
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https://bugs.launchpad.net/bugs/1659590
Title:
containers won't start after lxc and apparmor upgrades in trusty
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