** Description changed: + [Impact] + + If a user is tracking a process with PID > 32767 keepalived will not be + able to work as expected. + + This bug was fixed upstream here: + https://github.com/acassen/keepalived/commit/23a5b8113bf0b8ec4718443df0406882e8e4d831 + + [Test Plan] + + Launch a Focal VM and run the following commands: + + # install keepalived and nginx + $ apt install -y nginx keepalived + + # configure keepalived to track the nginx process + $ cat << EOF > /etc/keepalived/keepalived.conf + global_defs { + enable_script_security + } + vrrp_track_process track_nginx { + process nginx + weight 10 + delay 1 + } + vrrp_instance lb { + interface enp5s0 + state MASTER + priority 100 + virtual_router_id 50 + authentication { + auth_type PASS + auth_pass password + } + track_process { + track_nginx + } + virtual_ipaddress { + 10.191.226.19 + } + } + EOF + $ systemctl restart keepalived + + # stop nginx process to loose quorum + $ systemctl stop nginx + $ journalctl -u keepalived | grep Quorum + Feb 07 20:13:04 keepalived-debug Keepalived_vrrp[3346]: Quorum lost for tracked process track_nginx + + # start nginx process to gain quorum + $ systemctl start nginx + $ pidof nginx + 3282 3281 + $ journalctl -u keepalived | grep Quorum + Feb 07 20:13:04 keepalived-debug Keepalived_vrrp[3346]: Quorum lost for tracked process track_nginx + Feb 07 20:19:58 keepalived-debug Keepalived_vrrp[3346]: Quorum gained for tracked process track_nginx + + # stop nginx process to loose quorum again + $ systemctl stop nginx + $ journalctl -u keepalived | grep Quorum + Feb 07 20:13:04 keepalived-debug Keepalived_vrrp[3346]: Quorum lost for tracked process track_nginx + Feb 07 20:19:58 keepalived-debug Keepalived_vrrp[3346]: Quorum gained for tracked process track_nginx + Feb 07 20:21:39 keepalived-debug Keepalived_vrrp[3346]: Quorum lost for tracked process track_nginx + + # start nginx process forcing its PID to be > 32767 + $ echo 32767 > /proc/sys/kernel/ns_last_pid; systemctl start nginx + $ pidof nginx + 32773 32772 + + # quorum is not gained again + $ journalctl -u keepalived | grep Quorum + Feb 07 20:13:04 keepalived-debug Keepalived_vrrp[3346]: Quorum lost for tracked process track_nginx + Feb 07 20:19:58 keepalived-debug Keepalived_vrrp[3346]: Quorum gained for tracked process track_nginx + Feb 07 20:21:39 keepalived-debug Keepalived_vrrp[3346]: Quorum lost for tracked process track_nginx + + + [Where problems could occur] + + The upstream fix is quite straightforward but if a problem would occur + it would be manifested in any tracking process feature in keepalived. + Since keepalived is widely used in HA, this might be reflected in some + specific setups using keepalived. + + [Original description] + Keepalived doesn't regain quorum when using tracked process due to a bug in high numbered pids The upstream has already fixed in a patch release 2.0.20 https://serverfault.com/questions/993432/keepalived-doesnt-gain-quorum- when-tracked-process-comes-up Could we please get the 2.0.20 released to 20.04
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1960036 Title: [SRU] Doesn't regain quorum when tracked process restarts with PID > 32767 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/keepalived/+bug/1960036/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
