today my systemd restarted some services and stopped others, I don't know why this happened, it was automatic.
> Aug 15 00:51:36 ns519723 sshd[18469]: Disconnected from 49.88.112.73 port 58638 [preauth]
Aug 15 00:51:36 ns519723 systemd[1]: sqlbak.service: Failed with result 'signal'.
Aug 15 00:51:36 ns519723 systemd[1]: nginx.service: Failed with result 'signal'.
Aug 15 00:51:36 ns519723 systemd[1]: systemd-timesyncd.service: Service has no hold-off time, scheduling restart.
Aug 15 00:51:36 ns519723 systemd[1]: systemd-timesyncd.service: Scheduled restart job, restart counter is at 1.
Aug 15 00:51:36 ns519723 systemd[1]: systemd-journald.service: Service has no hold-off time, scheduling restart.
Aug 15 00:51:36 ns519723 systemd[1]: systemd-journald.service: Scheduled restart job, restart counter is at 1.
Aug 15 00:51:36 ns519723 systemd[1]: Stopped Flush Journal to Persistent Storage.
Aug 15 00:51:36 ns519723 systemd[1]: Stopping Flush Journal to Persistent Storage...
Aug 15 00:51:36 ns519723 systemd[1]: Stopped Journal Service.
Aug 15 00:51:36 ns519723 systemd[1]: Starting Journal Service...
Aug 15 00:51:36 ns519723 systemd-journald[18508]: Journal started
Aug 15 00:51:36 ns519723 systemd-journald[18508]: System journal (/var/log/journal/0c298492af3ba8cd1f9f463460b4e52a) is 3.9G, max 4.0G, 23.8M free.
Aug 15 00:51:36 ns519723 systemd[1]: lvm2-lvmetad.service: Main process exited, code=killed, status=9/KILL
Aug 15 00:51:36 ns519723 systemd[1]: lvm2-lvmetad.service: Failed with result 'signal'.
Aug 15 00:51:36 ns519723 systemd[1]: apache2.service: Main process exited, code=killed, status=9/KILL
Aug 15 00:51:36 ns519723 systemd[1]: cron.service: Main process exited, code=killed, status=9/KILL
Aug 15 00:51:36 ns519723 systemd[1]: cron.service: Failed with result 'signal'.
Aug 15 00:51:36 ns519723 systemd[1]: dbus.service: Main process exited, code=killed, status=9/KILL
Aug 15 00:51:36 ns519723 systemd[1]: dbus.service: Failed with result 'signal'.
Aug 15 00:51:36 ns519723 systemd[1]: atd.service: Main process exited, code=killed, status=9/KILL
Aug 15 00:51:36 ns519723 systemd[1]: atd.service: Failed with result 'signal'.
Aug 15 00:51:36 ns519723 systemd[1]: irqbalance.service: Main process exited, code=killed, status=9/KILL
Aug 15 00:51:36 ns519723 systemd[1]: irqbalance.service: Failed with result 'signal'.
Aug 15 00:51:36 ns519723 systemd[1]: ssh.service: Main process exited, code=killed, status=9/KILL
Aug 15 00:51:36 ns519723 systemd[1]: ssh.service: Failed with result 'signal'.
Aug 15 00:51:36 ns519723 systemd[1]: rsyslog.service: Main process exited, code=killed, status=9/KILL
Aug 15 00:51:36 ns519723 systemd[1]: rsyslog.service: Failed with result 'signal'.
Aug 15 00:51:36 ns519723 systemd[1]: unattended-upgrades.service: Main process exited, code=killed, status=9/KILL
Aug 15 00:51:36 ns519723 systemd[1]: unattended-upgrades.service: Failed with result 'signal'.
Aug 15 00:51:36 ns519723 systemd[1]: sqlbak.service: Main process exited, code=killed, status=9/KILL
Aug 15 00:51:36 ns519723 systemd[1]: networkd-dispatcher.service: Main process exited, code=killed, status=9/KILL
Aug 15 00:51:36 ns519723 systemd[1]: networkd-dispatcher.service: Failed with result 'signal'.
Aug 15 00:51:36 ns519723 systemd[1]: bind9.service: Main process exited, code=killed, status=9/KILL
Aug 15 00:51:36 ns519723 systemd[1]: bind9.service: Failed with result 'signal'.
Aug 15 00:51:36 ns519723 systemd[1]: accounts-daemon.service: Main process exited, code=killed, status=9/KILL
Aug 15 00:51:36 ns519723 systemd[1]: accounts-daemon.service: Failed with result 'signal'.
Aug 15 00:51:36 ns519723 systemd[1]: polkit.service: Main process exited, code=killed, status=9/KILL
Aug 15 00:51:36 ns519723 systemd[1]: polkit.service: Failed with result 'signal'.
Aug 15 00:51:36 ns519723 systemd[1]: nginx.service: Main process exited, code=killed, status=9/KILL
Aug 15 00:51:36 ns519723 systemd[1]: nginx.service: Killing process 9497 (nginx) with signal SIGKILL.
Aug 15 00:51:36 ns519723 systemd[1]: nginx.service: Killing process 9499 (nginx) with signal SIGKILL.
Aug 15 00:51:36 ns519723 systemd[1]: nginx.service: Killing process 9501 (nginx) with signal SIGKILL.
Aug 15 00:51:36 ns519723 systemd[1]: [email protected]: Service has no hold-off time, scheduling restart.
Aug 15 00:51:36 ns519723 systemd[1]: [email protected]: Scheduled restart job, restart counter is at 1.
Aug 15 00:51:36 ns519723 systemd[1]: Stopped Getty on tty1.
Aug 15 00:51:36 ns519723 systemd[1]: Started Getty on tty1.
Aug 15 00:51:36 ns519723 systemd[1]: systemd-timesyncd.service: Main process exited, code=killed, status=9/KILL
Aug 15 00:51:36 ns519723 systemd[1]: systemd-timesyncd.service: Failed with result 'signal'.
Aug 15 00:51:36 ns519723 systemd[1]: systemd-journald.service: Main process exited, code=killed, status=9/KILL
Aug 15 00:51:36 ns519723 systemd[1]: systemd-journald.service: Failed with result 'signal'.
Aug 15 00:51:36 ns519723 systemd[1]: ssh.service: Service hold-off time over, scheduling restart.
Aug 15 00:51:36 ns519723 systemd[1]: ssh.service: Scheduled restart job, restart counter is at 1.
Aug 15 00:51:36 ns519723 systemd[1]: rsyslog.service: Service hold-off time over, scheduling restart.
Aug 15 00:51:36 ns519723 systemd[1]: rsyslog.service: Scheduled restart job, restart counter is at 1.
Aug 15 00:51:36 ns519723 systemd[1]: [email protected]: Service hold-off time over, scheduling restart.
Aug 15 00:51:36 ns519723 systemd[1]: [email protected]: Scheduled restart job, restart counter is at 1.
Aug 15 00:51:36 ns519723 systemd[1]: Stopped Serial Getty on ttyS0.
Aug 15 00:51:36 ns519723 systemd-networkd[18516]: eno1: Gained IPv6LL
Aug 15 00:51:36 ns519723 systemd[1]: Started Serial Getty on ttyS0.
Aug 15 00:51:36 ns519723 systemd-networkd[18516]: Enumeration completed
Aug 15 00:51:36 ns519723 systemd-networkd[18516]: eno1: IPv6 successfully enabled
Aug 15 00:51:36 ns519723 systemd[1]: Started D-Bus System Message Bus.
Aug 15 00:51:36 ns519723 dbus-daemon[18522]: [system] AppArmor D-Bus mediation is enabled
Aug 15 00:51:36 ns519723 systemd-networkd[18516]: eno1: Configured
Aug 15 00:51:36 ns519723 systemd[1]: Stopped System Logging Service.
Aug 15 00:51:36 ns519723 systemd[1]: Starting System Logging Service...
Aug 15 00:51:36 ns519723 systemd[1]: Stopped OpenBSD Secure Shell server.
Aug 15 00:51:36 ns519723 systemd[1]: Starting OpenBSD Secure Shell server...
Aug 15 00:51:36 ns519723 systemd[1]: Starting Flush Journal to Persistent Storage...
Aug 15 00:51:36 ns519723 systemd[1]: Started Network Service.
Aug 15 00:51:36 ns519723 systemd[1]: Started udev Kernel Device Manager.
Aug 15 00:51:36 ns519723 systemd[1]: systemd-logind.service: Main process exited, code=killed, status=9/KILL
Aug 15 00:51:36 ns519723 systemd[1]: systemd-logind.service: Failed with result 'signal'.
Aug 15 00:51:36 ns519723 systemd[1]: apache2.service: Service hold-off time over, scheduling restart.
Aug 15 00:51:36 ns519723 systemd[1]: apache2.service: Scheduled restart job, restart counter is at 1.
Aug 15 00:51:36 ns519723 systemd[1]: systemd-logind.service: Service has no hold-off time, scheduling restart.
Aug 15 00:51:36 ns519723 systemd[1]: systemd-logind.service: Scheduled restart job, restart counter is at 1.
Aug 15 00:51:36 ns519723 systemd[1]: Stopped Login Service.
Aug 15 00:51:36 ns519723 systemd[1]: Starting Login Service...
Aug 15 00:51:36 ns519723 systemd[1]: Stopped The Apache HTTP Server.
Aug 15 00:51:36 ns519723 systemd[1]: Starting The Apache HTTP Server...
Aug 15 00:51:36 ns519723 systemd[1]: Starting Wait for Network to be Configured...
Aug 15 00:51:36 ns519723 systemd-networkd-wait-online[18553]: ignoring: lo
Aug 15 00:51:36 ns519723 systemd-networkd-wait-online[18553]: managing: eno1
Aug 15 00:51:36 ns519723 systemd[1]: lxcfs.service: Service hold-off time over, scheduling restart.
Aug 15 00:51:36 ns519723 systemd[1]: lxcfs.service: Scheduled restart job, restart counter is at 1.
Aug 15 00:51:36 ns519723 systemd[1]: Started Wait for Network to be Configured.
Aug 15 00:51:36 ns519723 systemd[1]: Stopped FUSE filesystem for LXC.
Aug 15 00:51:36 ns519723 systemd[1]: Started FUSE filesystem for LXC.
Aug 15 00:51:36 ns519723 systemd[1]: mysql.service: Service hold-off time over, scheduling restart.
Aug 15 00:51:36 ns519723 systemd[1]: mysql.service: Scheduled restart job, restart counter is at 1.
Aug 15 00:51:36 ns519723 systemd[1]: Stopped MySQL Community Server.
Aug 15 00:51:36 ns519723 systemd[1]: Starting MySQL Community Server...
Aug 15 00:51:36 ns519723 systemd[1]: Started System Logging Service.
Aug 15 00:51:36 ns519723 rsyslogd[18548]: imuxsock: Acquired UNIX socket '/run/systemd/journal/syslog' (fd 3) from systemd. [v8.32.0]
Aug 15 00:51:36 ns519723 rsyslogd[18548]: rsyslogd's groupid changed to 106
Aug 15 00:51:36 ns519723 rsyslogd[18548]: rsyslogd's userid changed to 102
Aug 15 00:51:36 ns519723 rsyslogd[18548]: [origin software="rsyslogd" swVersion="8.32.0" x-pid="18548" x-info="http://www.rsyslog.com"] start
Aug 15 00:51:36 ns519723 systemd[1]: Started Flush Journal to Persistent Storage.
Aug 15 00:51:36 ns519723 systemd[1]: Started The Apache HTTP Server.
Aug 15 00:51:36 ns519723 systemd-logind[18551]: New seat seat0.
Aug 15 00:51:36 ns519723 sshd[18573]: Server listening on 0.0.0.0 port 22.
Aug 15 00:51:36 ns519723 sshd[18573]: Server listening on :: port 22.
Aug 15 00:51:36 ns519723 systemd[1]: Started OpenBSD Secure Shell server.
Aug 15 00:51:36 ns519723 systemd-logind[18551]: Watching system buttons on /dev/input/event1 (Power Button)
Aug 15 00:51:36 ns519723 kernel: new mount options do not match the existing superblock, will be ignored
Aug 15 00:51:36 ns519723 lxcfs[18557]: mount namespace: 5
Aug 15 00:51:36 ns519723 lxcfs[18557]: hierarchies:
Aug 15 00:51:36 ns519723 lxcfs[18557]: 0: fd: 6: freezer
Aug 15 00:51:36 ns519723 lxcfs[18557]: 1: fd: 7: memory
Aug 15 00:51:36 ns519723 lxcfs[18557]: 2: fd: 8: hugetlb
Aug 15 00:51:36 ns519723 lxcfs[18557]: 3: fd: 9: perf_event
Aug 15 00:51:36 ns519723 lxcfs[18557]: 4: fd: 10: pids
Aug 15 00:51:36 ns519723 lxcfs[18557]: 5: fd: 11: cpuset
Aug 15 00:51:36 ns519723 lxcfs[18557]: 6: fd: 12: rdma
Aug 15 00:51:36 ns519723 lxcfs[18557]: 7: fd: 13: devices
Aug 15 00:51:36 ns519723 lxcfs[18557]: 8: fd: 14: net_cls,net_prio
Aug 15 00:51:36 ns519723 lxcfs[18557]: 9: fd: 15: blkio
Aug 15 00:51:36 ns519723 lxcfs[18557]: 10: fd: 16: cpu,cpuacct
Aug 15 00:51:36 ns519723 lxcfs[18557]: 11: fd: 17: name=systemd
Aug 15 00:51:36 ns519723 lxcfs[18557]: 12: fd: 18: unified
Aug 15 00:51:36 ns519723 systemd-logind[18551]: Watching system buttons on /dev/input/event0 (Power Button)
Aug 15 00:51:36 ns519723 systemd-resolved[18515]: Positive Trust Anchors:
Aug 15 00:51:36 ns519723 systemd-resolved[18515]: . IN DS 19036 8 2 49aac11d7b6f6446702e54a1607371607a1a41855200fd2ce1cdde32f24e8fb5
Aug 15 00:51:36 ns519723 systemd-resolved[18515]: . IN DS 20326 8 2 e06d44b80b8f1d39a95c0b0d7c65d08458e880409bbc683457104237c7f8ec8d
Aug 15 00:51:36 ns519723 systemd-resolved[18515]: Negative trust anchors: 10.in-addr.arpa 16.172.in-addr.arpa 17.172.in-addr.arpa 18.172.in-addr.arpa 19.172.in-addr.arpa 20.172.in-addr.arpa 21.172.
Aug 15 00:51:36 ns519723 systemd-resolved[18515]: Using system hostname 'ns519723'.
Aug 15 00:51:36 ns519723 systemd[1]: Started Network Name Resolution.
Aug 15 00:51:36 ns519723 systemd[1]: Started Network Time Synchronization.
Aug 15 00:51:36 ns519723 systemd-timesyncd[18509]: Synchronized to time server 213.251.128.249:123 (ntp.ovh.net).
Aug 15 00:51:37 ns519723 systemd[1]: Started MySQL Community Server.
Aug 15 00:51:37 ns519723 systemd[1]: Started Login Service.
Aug 15 00:51:37 ns519723 systemd-logind[18551]: New session 12367 of user root.
Aug 15 00:51:37 ns519723 systemd[1]: Starting User Manager for UID 0...
Aug 15 00:51:37 ns519723 systemd[18684]: pam_unix(systemd-user:session): session opened for user root by (uid=0)
Aug 15 00:51:37 ns519723 systemd[18684]: Listening on GnuPG cryptographic agent and passphrase cache (restricted).
Aug 15 00:51:37 ns519723 systemd[18684]: Listening on GnuPG cryptographic agent and passphrase cache.
Aug 15 00:51:37 ns519723 systemd[18684]: Reached target Paths.
Aug 15 00:51:37 ns519723 systemd[18684]: Listening on GnuPG cryptographic agent and passphrase cache (access for web browsers).
Aug 15 00:51:37 ns519723 systemd[18684]: Listening on GnuPG cryptographic agent (ssh-agent emulation).
Aug 15 00:51:37 ns519723 systemd[18684]: Listening on GnuPG network certificate management daemon.
Aug 15 00:51:37 ns519723 systemd[18684]: Listening on REST API socket for snapd user session agent.
Aug 15 00:51:37 ns519723 systemd[18684]: Reached target Sockets.
Aug 15 00:51:37 ns519723 systemd[18684]: Reached target Timers.
Aug 15 00:51:37 ns519723 systemd[18684]: Reached target Basic System.
Aug 15 00:51:37 ns519723 systemd[18684]: Reached target Default.
Aug 15 00:51:37 ns519723 systemd[18684]: Startup finished in 20ms.
Aug 15 00:51:37 ns519723 systemd[1]: Started User Manager for UID 0.
Aug 15 00:51:37 ns519723 systemd-logind[18551]: Removed session 12367.
Aug 15 00:51:37 ns519723 systemd[1]: Stopping User Manager for UID 0...
Aug 15 00:51:37 ns519723 systemd[18684]: Stopped target Default.
Aug 15 00:51:37 ns519723 systemd[18684]: Stopped target Basic System.
Aug 15 00:51:37 ns519723 systemd[18684]: Stopped target Sockets.
Aug 15 00:51:37 ns519723 systemd[18684]: Closed GnuPG cryptographic agent and passphrase cache (restricted).
Aug 15 00:51:37 ns519723 systemd[18684]: Closed GnuPG cryptographic agent and passphrase cache (access for web browsers).
Aug 15 00:51:37 ns519723 systemd[18684]: Closed GnuPG cryptographic agent (ssh-agent emulation).
Aug 15 00:51:37 ns519723 systemd[18684]: Stopped target Paths.
Aug 15 00:51:37 ns519723 systemd[18684]: Closed REST API socket for snapd user session agent.
Aug 15 00:51:37 ns519723 systemd[18684]: Closed GnuPG network certificate management daemon.
Aug 15 00:51:37 ns519723 systemd[18684]: Closed GnuPG cryptographic agent and passphrase cache.
Aug 15 00:51:37 ns519723 systemd[18684]: Reached target Shutdown.
Aug 15 00:51:37 ns519723 systemd[18684]: Stopped target Timers.
Aug 15 00:51:37 ns519723 systemd[18684]: Starting Exit the Session...
Aug 15 00:51:37 ns519723 systemd[18684]: Received SIGRTMIN+24 from PID 18697 (kill).
Aug 15 00:51:37 ns519723 systemd[1]: Stopped User Manager for UID 0.
Aug 15 00:51:37 ns519723 systemd[1]: Removed slice User Slice of root.
Aug 15 00:51:40 ns519723 sshd[18699]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=49.88.112.116 user=root
Does anyone know why this might have happened?
