Quoting Mikhail Gusarov (dotted...@dottedmag.net): > Hello. > > I have tried to run two containers with avahi-daemon in each. First > avahi-daemon starts fine, while second fails with > > # /usr/sbin/avahi-daemon > Found user 'avahi' (UID 103) and group 'avahi' (GID 105). > Successfully dropped root privileges. > chroot.c: fork() failed: Resource temporarily unavailable > failed to start chroot() helper daemon. > cf-slave1:~# > > After some thinking and strace'ing I figured out that the following is > the cause: > > cf-slave1:~# strace /usr/sbin/avahi-daemon > ... > setresuid32(103, 103, 103) = 0 > ... > setrlimit(RLIMIT_NPROC, {rlim_cur=3, rlim_max=3}) = 0 > ... > clone(child_stack=0, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, > child_tidptr=0xb761d908) = -1 EAGAIN (Resource temporarily unavailable) > ... > # > > Here process drops root privileges, setuids to uid=103 and limits itself > to 3 processes with this uid. Clone fails due to fact there are two > processes with uid=103 running in another container. > > Is it a known limitation, or maybe this is already handled in newer > kernels? (I use 2.6.32)
Hmm, you'll need to unshare the user namespace. Try adding CLONE_NEWUSER to the list assigned to clone_flags at lxc/src/lxc/start.c line 353. -serge ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Lxc-users mailing list Lxc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lxc-users