Hi, I lxc-attached the container and stopped sshd and started sshd . Next step was to strace -p PID for sshd while opening a new ssh session from outside. As you can see no child processes started from sshd. se out put below from ps aux, strace -p. I also attched output from netstan -an inside the lxc during the attempted login connection
=============================================== ps aux USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND root 1 0.0 0.0 28208 3312 ? Ss Apr23 0:01 /sbin/init root 38 0.0 0.0 32968 4372 ? Ss Apr23 0:00 /lib/systemd/systemd-journald root 96 0.0 0.0 27476 1432 ? Ss Apr23 0:00 /usr/sbin/cron -f root 102 0.0 0.0 12664 1236 tty3 Ss+ Apr23 0:00 /sbin/agetty --noclear tty3 linux root 103 0.0 0.0 12664 1212 tty2 Ss+ Apr23 0:00 /sbin/agetty --noclear tty2 linux root 104 0.0 0.0 12664 1172 tty4 Ss+ Apr23 0:00 /sbin/agetty --noclear tty4 linux root 105 0.0 0.0 12664 1224 tty1 Ss+ Apr23 0:00 /sbin/agetty --noclear tty1 linux root 106 0.0 0.0 14236 1272 console Ss+ Apr23 0:00 /sbin/agetty --noclear --keep-baud console 115200 38400 9600 vt102 root 121 0.0 0.0 8440 1160 ? S Apr23 0:00 /usr/sbin/syslogd --no-forward Debian-+ 364 0.0 0.0 53248 2260 ? Ss Apr23 0:00 /usr/sbin/exim4 -bd -q30m root 2190 0.0 0.0 21884 2628 ? Ss 18:01 0:00 /bin/bash root 2284 0.0 0.0 42336 1960 ? S 18:17 0:00 /usr/sbin/CRON -f root 2475 0.0 0.0 42336 1960 ? S 19:17 0:00 /usr/sbin/CRON -f root 2686 0.0 0.0 42336 1960 ? S 20:17 0:00 /usr/sbin/CRON -f root 2773 0.0 0.0 55184 4064 ? Ss 20:22 0:00 /usr/sbin/sshd -D root 2774 0.0 0.0 19100 1656 ? R+ 20:22 0:00 ps aux root@kjell:/etc/init.d# strace -p 2773 Process 2773 attached sendto(4, "<38>Apr 25 20:22:26 sshd[2773]: "..., 68, MSG_NOSIGNAL, NULL, 0 =================================================================== netstat -an Active Internet connections (servers and established) Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN tcp 49 0 192.168.60.2:22 192.168.60.55:52195 ESTABLISHED tcp 22 0 192.168.60.2:22 192.168.60.55:52190 CLOSE_WAIT tcp 22 0 192.168.60.2:22 192.168.60.55:52186 CLOSE_WAIT tcp6 0 0 ::1:25 :::* LISTEN Active UNIX domain sockets (servers and established) Proto RefCnt Flags Type State I-Node Path unix 2 [ ] DGRAM 27827 /run/systemd/notify unix 10 [ ] DGRAM 28002 /dev/log unix 2 [ ACC ] STREAM LISTENING 27828 /run/systemd/private unix 2 [ ] DGRAM 27831 /run/systemd/shutdownd unix 2 [ ] DGRAM 27832 /run/systemd/journal/dev-log unix 2 [ ACC ] STREAM LISTENING 27833 /run/systemd/journal/stdout unix 3 [ ] DGRAM 27834 /run/systemd/journal/socket unix 3 [ ] STREAM CONNECTED 29197 unix 2 [ ] DGRAM 508549 unix 2 [ ] DGRAM 489859 unix 3 [ ] STREAM CONNECTED 27206 /run/systemd/journal/stdout unix 3 [ ] STREAM CONNECTED 508544 unix 2 [ ] DGRAM 27870 unix 2 [ ] DGRAM 498478 unix 3 [ ] STREAM CONNECTED 509454 /run/systemd/journal/stdout unix 2 [ ] DGRAM 508982 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1572061 Title: login sessions hangs in lxc To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1572061/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
