常規狀況下,當JUNOS進程異常或內核崩潰時,將自動生成一個Core-dump文件,有時故障排查的須要下,需手動的去生成一個Core-dump文件。node
以NSD進程手動生成Core-dump爲例:shell
{primary:node0}ide
root@vsrx-a> show system processes extensive | match nsdspa
Mar 06 01:57:59debug
8128 root 1 76 0 14416K 9464K select 0 0:00 0.00% nsd日誌
NSD的進程ID是8128, 當前防火牆沒有任何的Core-dump文件:router
{primary:node0}blog
root@vsrx-a> show system core-dumps接口
Mar 06 01:58:45進程
node0:
--------------------------------------------------------------------------
/var/crash/*core*: No such file or directory
/var/tmp/*core*: No such file or directory
/var/tmp/pics/*core*: No such file or directory
/var/crash/kernel.*: No such file or directory
/tftpboot/corefiles/*core*: No such file or directory
現手動的爲NSD進程手動生成一個Core-dump文件,使用request命令生動產生Core-dump文件時,會致使nsd進程重啓。
{primary:node0}
root@vsrx-a> request system core-dump network-security node 0
{primary:node0}
root@vsrx-a> show system processes extensive | match nsd
Mar 06 02:01:43
8471 root 1 76 0 14212K 8652K select 0 0:00 0.00% nsd
{primary:node0}
root@vsrx-a> show system core-dumps
Mar 06 02:01:46
node0:
--------------------------------------------------------------------------
/var/crash/*core*: No such file or directory
-rw-rw---- 1 root wheel 304987 Mar 6 02:01 /var/tmp/nsd.core-tarball.0.tgz
/var/tmp/pics/*core*: No such file or directory
/var/crash/kernel.*: No such file or directory
/tftpboot/corefiles/*core*: No such file or directory
total files: 1
如下方法爲不重啓NSD的狀況下,生成一個Core-dump信息:
{primary:node0}
root@vsrx-a> show system processes extensive | match nsd
Mar 06 02:03:34
8471 root 1 76 0 14212K 8652K select 0 0:00 0.00% nsd
{primary:node0}
root@vsrx-a> start shell
root@vsrx-a% gcore -s -c /var/tmp/nsd.core.8471 8471
root@vsrx-a% cli
{primary:node0}
root@vsrx-a> show system core-dumps
node0:
--------------------------------------------------------------------------
/var/crash/*core*: No such file or directory
-rw-rw---- 1 root wheel 304987 Mar 6 02:01 /var/tmp/nsd.core-tarball.0.tgz
-rw-r--r-- 1 root wheel 5758976 Mar 6 02:04 /var/tmp/nsd.core.8471
/var/tmp/pics/*core*: No such file or directory
/var/crash/kernel.*: No such file or directory
/tftpboot/corefiles/*core*: No such file or directory
total files: 2
{primary:node0}
root@vsrx-a> show system processes extensive | match nsd
8471 root 1 76 0 14212K 9288K select 0 0:00 0.00% nsd
生成一個內核的core-dump (RE將會重啓)
root@vsrx-a% sysctl -w debug.kdb.panic=1
debug.kdb.panic: 0
sysctl: debug.kdb.panic: Operation not permitted
root@vsrx-a%
Note:真機可能會能夠使用
或者如下方式:
set system debugger-on-break
then
router>edit
router#
ctrl ]
telnet>send brk
db> panic
在線生成一個Kernel Core-dump信息,而不重啓RE
root@lab-16% sysctl -w kern.live_core_dump=1
kern.live_core_dump: 0 -> 1
FPC/IQ2/MS-PIC/上生成一個Core-dump信息(CPU將會重啓)
VMX(vmx16 vty)# set parser security 10
Security level set to 10
VMX(vmx16 vty)# test panic
The semaphore timeout period has expired.
Press Ctrl+C to cancel or Enter to reconnect immediately.
Reconnecting in 1 seconds
這樣將會致使FPC板卡Offline,須要手工的Online一把後,板卡Online了,可是沒法與原先板卡上的接口互通,後嘗試重試Vmx後,能夠正常通訊。
能夠不用重啓CPU的方式,但Services PIC可能會Restart。
Note: 如下命令可能真機板卡支持,當前全部手工產生Core-dump的命令,慎用。
VMX(lab-16 vty)# wr coredump
^
Syntax error at `wr'.
VMX(lab-16 vty)# write coredump
^
Syntax error at `write'.
設備上查看小的Core-dump日誌分析信息,使用如下命令:
root@lab-16> show system core-dumps core-file-info /var/tmp/vmxt.core.0.gz detail