Galera startup under LXC 2.0.8 on CentOS 7

strace.txt

31298 statfs("/dev", {f_type=0x1021994, f_bsize=4096, f_blocks=968407, f_bfree=968407, f_bavail=968407, f_files=968407, f_ffree=968389, f_fsid={0, 0}, f_namelen=255, f_frsize=4096}) = 0
31298 stat("/dev", {st_mode=S_IFDIR|0755, st_size=380, ...}) = 0
31298 mount(NULL, "/dev", NULL, MS_NOSUID|MS_REMOUNT|MS_BIND, NULL) = 0
31298 statfs("/dev/lxc/tty3", 0x7fff0139c200) = -1 ENOENT (No such file or directory)
31298 mount(NULL, "/dev/lxc/tty3", NULL, MS_REMOUNT|MS_BIND, NULL) = -1 ENOENT (No such file or directory)
31298 statfs("/dev/lxc/tty2", 0x7fff0139c200) = -1 ENOENT (No such file or directory)
31298 mount(NULL, "/dev/lxc/tty2", NULL, MS_REMOUNT|MS_BIND, NULL) = -1 ENOENT (No such file or directory)
31298 statfs("/dev/log", {f_type=0x1021994, f_bsize=4096, f_blocks=123, f_bfree=123, f_bavail=123, f_files=968407, f_ffree=968375, f_fsid={0, 0}, f_namelen=255, f_frsize=4096}) = 0
31298 stat("/dev/log", {st_mode=S_IFSOCK|0666, st_size=0, ...}) = 0
31298 mount(NULL, "/dev/log", NULL, MS_REMOUNT|MS_BIND, NULL) = 0
31298 statfs("/dev/lxc/tty1", 0x7fff0139c200) = -1 ENOENT (No such file or directory)
31298 mount(NULL, "/dev/lxc/tty1", NULL, MS_REMOUNT|MS_BIND, NULL) = -1 ENOENT (No such file or directory)
31298 statfs("/dev/ptmx", {f_type="DEVPTS_SUPER_MAGIC", f_bsize=4096, f_blocks=0, f_bfree=0, f_bavail=0, f_files=0, f_ffree=0, f_fsid={0, 0}, f_namelen=255, f_frsize=4096}) = 0
31298 stat("/dev/ptmx", {st_mode=S_IFCHR|0666, st_rdev=makedev(5, 2), ...}) = 0
31298 mount(NULL, "/dev/ptmx", NULL, MS_REMOUNT|MS_BIND, NULL) = -1 EINVAL (Invalid argument)
31298 close(3)                          = 0
31298 munmap(0x7fc9dca39000, 4096)      = 0
31298 socket(PF_LOCAL, SOCK_DGRAM|SOCK_CLOEXEC, 0) = 3
31298 getsockopt(3, SOL_SOCKET, SO_SNDBUF, [212992], [4]) = 0
31298 setsockopt(3, SOL_SOCKET, 0x20 /* SO_??? */, [8388608], 4) = 0
31298 setsockopt(3, SOL_SOCKET, SO_SNDTIMEO, "\n\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 16) = 0
31298 connect(3, {sa_family=AF_LOCAL, sun_path="/run/systemd/journal/socket"}, 29) = 0
31298 sendmsg(3, {msg_name(0)=NULL, msg_iov(11)=[{"PRIORITY=3\nSYSLOG_FACILITY=3\nCOD"..., 124}, {"USER_UNIT=mariadb.service", 25}, {"\n", 1}, {"MESSAGE_ID=641257651c1b4ec9a8624"..., 43}, {"\n", 1}, {"EXECUTABLE=/bin/sh", 18}, {"\n", 1}, {"MESSAGE=Failed at step NAMESPACE"..., 67}, {"\n", 1}, {"ERRNO=22", 8}, {"\n", 1}], msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 290
31298 exit_group(226)                   = ?