今天上午准备登陆下测试环境的zabbix-server服务器查个东西，发现ssh连接不上，报"No space left on device"。
代码语言：javascript复制1[C:~]$ ssh 172.16.131.142
2Last login: Fri Nov 1 11:28:19 2019 from 10.16.75.35
3/root/.pyenv/libexec/pyenv-init: line 131: cannot create temp file for here-document: No space left on device于是使用ansible跳过去，查看磁盘空间发现根目录已经100%了。
代码语言：javascript复制1[root@ansible ~]# ssh 172.16.131.142
2[root@zabbix1 ~]# df -h
3Filesystem Size Used Avail Use% Mounted on
4/dev/vda1 50G 50G 0 100% /
5/dev/mapper/datavg-home_lv
6 343G 178G 148G 55% /home
7/dev/mapper/datavg-swap_lv
8 976M 490M 436M 53% /swap因为之前遇到过类似情况，所以我猜想还是boot.log满了，去看一下,果然已经占了41个G。
代码语言：javascript复制 1[root@zabbix1 ~]# cd /var/log/
2[root@zabbix1 log]# du -sh *
3 326M audit
4 441G boot.log
5 54.0K dmesg
6 64.0K dmesg.old
7 74.0K dracut.log
8 850M httpd
9 9824M messages
10104.0K tallylog
1111224K wtmp
12124.0K yum.log
131321M zabbix查看日志里面的内容，日志在疯狂的写入，只截取部分。
代码语言：javascript复制 1[root@zabbix1 log]# tail -f boot.log
2 Nov 1 11:33:22 172.16.32.2 date=2019-11-01 time=11:33:22 devname=BJ-YZ-CO-FW1 devid=FG5H0E5818903326 logid=0103020301 type=event subtype=router level=information vd=root logdesc="Routing log" msg="OSPF: RtrPriority 1"
3 Nov 1 11:33:22 172.16.32.2 date=2019-11-01 time=11:33:22 devname=BJ-YZ-CO-FW1 devid=FG5H0E5818903326 logid=0103020301 type=event subtype=router level=information vd=root logdesc="Routing log" msg="OSPF: RtrDeadInterval 12"
4 Nov 1 11:33:22 172.16.32.2 date=2019-11-01 time=11:33:22 devname=BJ-YZ-CO-FW1 devid=FG5H0E5818903326 logid=0103020301 type=event subtype=router level=information vd=root logdesc="Routing log" msg="OSPF: DRouter 0.0.0.0"
5 Nov 1 11:33:22 172.16.32.2 date=2019-11-01 time=11:33:22 devname=BJ-YZ-CO-FW1 devid=FG5H0E5818903326 logid=0103020301 type=event subtype=router level=information vd=root logdesc="Routing log" msg="OSPF: BDRouter 0.0.0.0"
6 Nov 1 11:33:22 172.16.32.2 date=2019-11-01 time=11:33:22 devname=BJ-YZ-CO-FW1 devid=FG5H0E5818903326 logid=0103020301 type=event subtype=router level=information vd=root logdesc="Routing log" msg="OSPF: # Neighbors 1"
7 Nov 1 11:33:22 172.16.32.2 date=2019-11-01 time=11:33:22 devname=BJ-YZ-CO-FW1 devid=FG5H0E5818903326 logid=0103020301 type=event subtype=router level=information vd=root logdesc="Routing log" msg="OSPF: Neighbor 172.16.44.18"
8 Nov 1 11:33:22 172.16.32.2 date=2019-11-01 time=11:33:22 devname=BJ-YZ-CO-FW1 devid=FG5H0E5818903326 logid=0103020301 type=event subtype=router level=information vd=root logdesc="Routing log" msg="OSPF: NFSM[Vlanif105:172.16.44.18-172.16.46.1]: Full (HelloReceived)"
9 Nov 1 11:24:02 2019 BJ-YZ-DS-SW1&2 %DRVPLAT/4/DrvDebug: -DevIP=172.16.32.5-Slot=2; Many Parity Errors have been detected in last 10s.
10Nov 1 11:24:02 2019 BJ-YZ-DS-SW1&2 %DRVPLAT/4/Log Info: -DevIP=172.16.32.5-Slot=2; Slot 2,unit 0 DLB_HGT_FLOWSET_TIMESTAMP_PAGE_X entry 693 parity error.
11Nov 1 11:24:02 2019 BJ-YZ-DS-SW1&2 %DRVPLAT/4/Log Info: -DevIP=172.16.32.5-Slot=2; Slot 2,unit 0 DLB_HGT_FLOWSET_TIMESTAMP_PAGE_X entry 693 parity error.
12Nov 1 11:24:02 2019 BJ-YZ-DS-SW1&2 %DRVPLAT/4/Log Info: -DevIP=172.16.32.5-Slot=2; Slot 2,unit 0 DLB_HGT_FLOWSET_TIMESTAMP_PAGE_X entry 693 parity error.
13Nov 1 11:24:02 2019 BJ-YZ-DS-SW1&2 %DRVPLAT/4/Log Info: -DevIP=172.16.32.5-Slot=2; Slot 2,unit 0 DLB_HGT_FLOWSET_TIMESTAMP_PAGE_X entry 693 parity error.很明显日志里面有172.16.32.5和172.16.32.2的信息，去zabbix上看了一下发现是网络设备，但是zabbix显示的是已经挂掉了，但是可以查看，应该是缓存。
先备份下这个日志，再清空释放空间，因为根下已经没空间了，所以压缩到/home下。
代码语言：javascript复制1[root@zabbix1 log]# tar zcvf /home/2019-11-1-boot.log.tar.gz boot.log
2[root@zabbix1 log]# cat /dev/null > boot.log查看zabbix发现server的10051端口已经没有了，只有agent的10050端口
代码语言：javascript复制1[root@zabbix1 ~]# netstat -tnlp | grep zabbix
2Active Internet connections (only servers)
3Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
4tcp 0 0 :::10050 :::* LISTEN 15271/zabbix_agentd重启zabbix-server
代码语言：javascript复制1[root@zabbix1 ~]# service zabbix-server restart
2Shutting down Zabbix server: [FAILED]
3Starting Zabbix server: [ OK ]
4[root@zabbix1 ~]# netstat -tnlp | grep zabbix
5Active Internet connections (only servers)
6Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
7tcp 0 0 :::10050 :::* LISTEN 15271/zabbix_agentd
8tcp 0 0 :::10051 :::* LISTEN 1283/zabbix_server原因
172.16.32.5这台网络设备一直报错，导致不停的刷日志，zabbix-server上配置了网络设备的rsyslog，所以有大量的报错日志写入到boot.log。
解决办法
注释掉rsyslog中的/var/log/boot.log。
代码语言：javascript复制1[root@zabbix1 rsyslog.d]# vim /etc/rsyslog.conf
2#local7.* /var/log/boot.log
