/var/log/messages无日志输入的解决

log如下:
问题表现

[root@10-9-184-225 download_test]# ll /var/log/messages
-rw------- 1 root root 0 Dec  9 03:25 /var/log/messages

服务状态查看

[root@10-9-184-225 etc]# sudo service rsyslog status
Redirecting to /bin/systemctl status rsyslog.service
● rsyslog.service - System Logging Service
   Loaded: loaded (/usr/lib/systemd/system/rsyslog.service; enabled; vendor preset: enabled)
   Active: active (running) since Thu 2018-11-22 16:46:34 CST; 2 weeks 5 days ago
     Docs: man:rsyslogd(8)
           http://www.rsyslog.com/doc/
 Main PID: 832 (rsyslogd)
   CGroup: /system.slice/rsyslog.service
           └─832 /usr/sbin/rsyslogd -n

Dec 03 23:49:01 10-9-184-225 rsyslogd[832]: imjournal: journal reloaded... [v8.24.0 try http://www.rsyslog.com/e/0 ]
Jan 06 00:00:00 10-9-184-225 rsyslogd[832]: imjournal: journal reloaded... [v8.24.0 try http://www.rsyslog.com/e/0 ]
Apr 06 00:00:00 10-9-184-225 rsyslogd[832]: imjournal: journal reloaded... [v8.24.0 try http://www.rsyslog.com/e/0 ]
Dec 05 22:15:04 10-9-184-225 rsyslogd[832]: imjournal: begin to drop messages due to rate-limiting
Dec 06 10:10:01 10-9-184-225 rsyslogd[832]: imjournal: journal reloaded... [v8.24.0 try http://www.rsyslog.com/e/0 ]
Dec 07 15:50:01 10-9-184-225 rsyslogd[832]: imjournal: journal reloaded... [v8.24.0 try http://www.rsyslog.com/e/0 ]
Dec 09 03:25:02 10-9-184-225 rsyslogd[832]:  [origin software="rsyslogd" swVersion="8.24.0" x-pid="832" x-info="http://www.rsyslog.com"]...as HUPed
Dec 09 03:25:02 10-9-184-225 rsyslogd[832]:  [origin software="rsyslogd" swVersion="8.24.0" x-pid="832" x-info="http://www.rsyslog.com"]...as HUPed
Dec 09 14:24:01 10-9-184-225 rsyslogd[832]: imjournal: journal reloaded... [v8.24.0 try http://www.rsyslog.com/e/0 ]
Dec 11 13:11:01 10-9-184-225 rsyslogd[832]: imjournal: journal reloaded... [v8.24.0 try http://www.rsyslog.com/e/0 ]
Hint: Some lines were ellipsized, use -l to show in full.

[popexizhi: 这个hud好奇怪，是什么原因呢?下次出现strace一下吧]

重启服务并查看服务状态

[root@10-9-184-225 etc]# sudo service rsyslog restart
Redirecting to /bin/systemctl restart rsyslog.service
[root@10-9-184-225 etc]# sudo service rsyslog status
Redirecting to /bin/systemctl status rsyslog.service
● rsyslog.service - System Logging Service
   Loaded: loaded (/usr/lib/systemd/system/rsyslog.service; enabled; vendor preset: enabled)
   Active: active (running) since Wed 2018-12-12 15:34:46 CST; 1s ago
     Docs: man:rsyslogd(8)
           http://www.rsyslog.com/doc/
 Main PID: 10337 (rsyslogd)
   CGroup: /system.slice/rsyslog.service
           └─10337 /usr/sbin/rsyslogd -n

Dec 12 15:34:46 10-9-184-225 systemd[1]: Starting System Logging Service...
Dec 12 15:34:46 10-9-184-225 rsyslogd[10337]:  [origin software="rsyslogd" swVersion="8.24.0" x-pid="10337" x-info="http://www.rsyslog.com"] start
Dec 12 15:34:46 10-9-184-225 systemd[1]: Started System Logging Service.
Hint: Some lines were ellipsized, use -l to show in full.

问题解决:
[root@10-9-184-225 etc]# ll /var/log/messages
-rw------- 1 root root 1200 Dec 12 15:35 /var/log/messages
[root@10-9-184-225 etc]# tail /var/log/messages
Dec 12 15:34:46 10-9-184-225 rsyslogd: [origin software="rsyslogd" swVersion="8.24.0" x-pid="10337" x-info="http://www.rsyslog.com"] start
Dec 12 15:34:46 10-9-184-225 systemd: Started System Logging Service.
Dec 12 15:35:01 10-9-184-225 systemd: Started Session 70026 of user root.
Dec 12 15:35:01 10-9-184-225 systemd: Starting Session 70026 of user root.
Dec 12 15:35:01 10-9-184-225 systemd: Started Session 70025 of user root.
Dec 12 15:35:01 10-9-184-225 systemd: Starting Session 70025 of user root.
Dec 12 15:35:01 10-9-184-225 systemd: Started Session 70027 of user root.
Dec 12 15:35:01 10-9-184-225 systemd: Starting Session 70027 of user root.
Dec 12 15:35:01 10-9-184-225 crond: sendmail: fatal: parameter inet_interfaces: no local interface found for ::1
Dec 12 15:35:01 10-9-184-225 crond: sendmail: fatal: parameter inet_interfaces: no local interface found for ::1