This KB described how to collect logs on QFX5100 from Host.
Sometimes its required to check and copy logs on QFX5100 from Host for troubleshooting porpouses.
1.Login to shell of the Host
{master:0}
root@qfx5100> request app-engine ?
Possible completions:
cleanup Compute node cleanup /var/tmp and /var/log
file-copy Copy file from host to vjunos
offline Shutdown compute node
reboot Reboot compute node/virtual-machine
service Start/stop/restart compute node service
{master:0}
root@qfx5100> request app-engine host-shell >>>>>>>>>> login to host shell
Last login: Thu Feb 4 11:14:34 from 192.168.1.2
--- Host 13.2X51-D30_vjunos. built 2014-11-28 09:41:27 UTC
-sh-4.1#
-sh-4.1#
-sh-4.1#
-sh-4.1#
2.Below will zip all files from /var/log directory to file host-logs.tar under /var/log/:
-sh-4.1# tar -cvf /var/log/host-logs.tar /var/log tar: Removing leading `/' from member names /var/log/ /var/log/dmesg.old /var/log/messages /var/log/wtmp /var/log/dmesg /var/log/libvirt/ /var/log/libvirt/lxc/ /var/log/libvirt/qemu/ /var/log/libvirt/qemu/vjunos0.log /var/log/libvirt/libvirtd.log /var/log/libvirt/uml/ /var/log/stap-server/ /var/log/stap-server/log /var/log/host-logs.log /var/log/named.log /var/log/tallylog /var/log/lastlog /var/log/maillog /var/log/ntpstats/ /var/log/btmp /var/log/spooler /var/log/cron /var/log/boot.log /var/log/audit/ /var/log/secure /var/log/sa/ /var/log/sa/sar30 /var/log/sa/sa07 /var/log/sa/sa08 /var/log/sa/sa03 /var/log/sa/sar04 /var/log/sa/sar07 /var/log/sa/sa06 /var/log/sa/sa31 /var/log/sa/sar06 /var/log/sa/sar02 /var/log/sa/sar31 /var/log/sa/sa02 /var/log/sa/sa01 /var/log/sa/sar05 /var/log/sa/sa04 /var/log/sa/sar01 /var/log/sa/sar03 /var/log/sa/sa05 /var/log/watchdog/
3.Check if file was created correctly:
-sh-4.1# ls -al /var/log total 101920 drwxr-xr-x 8 root root 4096 Feb 8 13:52 . drwxr-xr-x 24 root root 4096 Jan 13 20:15 .. drwxr-xr-x 2 root root 4096 Oct 8 2014 audit -rw------- 1 root root 0 Dec 8 00:37 boot.log -rw-r--r-- 1 root root 0 Oct 9 2014 btmp -rw------- 1 root root 19965658 Feb 8 13:52 cron -rw-r--r-- 1 root root 39791 Jan 13 20:07 dmesg -rw-r--r-- 1 root root 39791 Jan 13 19:48 dmesg.old -rw-r--r-- 1 root root 56197120 Feb 8 13:52 host-logs.tar >>>>>>>>>>>>>>>>>>> -rw-r--r-- 1 root root 292 Feb 8 13:51 lastlog drwxr-xr-x 5 root root 4096 Dec 8 00:37 libvirt -rw------- 1 root root 0 Dec 8 00:37 maillog -rw-r--r-- 1 root root 838524 Feb 8 13:51 messages -rw-r--r-- 1 root root 0 Oct 8 2014 named.log drwxr-xr-x 2 root root 4096 Oct 9 2014 ntpstats drwxr-xr-x 2 root root 4096 Feb 8 00:00 sa -rw------- 1 root root 6811 Feb 8 13:51 secure -rw------- 1 root root 0 Dec 8 00:37 spooler drwxr-xr-x 2 root root 4096 Dec 8 00:34 stap-server -rw------- 1 root root 0 Oct 9 2014 tallylog drwxr-x--- 2 root root 4096 Dec 8 00:37 watchdog -rw-rw-r-- 1 root utmp 34176 Feb 8 13:51 wtmp -sh-4.1# exitrlogin: connection closed
4.Copy file from Host to Junos VM – from there you can copy file to remote server
{master:0}
root@qfx5100> request app-engine file-copy from-jhost host-logs.tar to-vjunos /var/tmp log
5.Check if file was transfered
{master:0}
root@qfx5100> file list /var/tmp detail
/var/tmp:
total blocks: 162988
drwxrwxr-x 2 root wheel 512 Jul 3 2014 .snap/
drwxr-xr-x 2 root field 512 Dec 8 00:38 gres-tp/
-rw-r--r-- 1 root field 56197120 Feb 8 13:54 host-logs.tar >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
drwxrwxrwx 2 root wheel 512 Dec 8 00:38 install/
drwxrwxrwx 2 root wheel 512 Dec 8 00:38 pics/
-r--r--r-- 1 root field 604 Dec 8 00:31 preinstall_boot_loader.conf
drwxr-xr-x 2 root field 512 Dec 8 00:38 rtsdb/
-rw-r----- 1 root field 1602 Jan 13 20:15 sampled.pkts
-rw-r--r-- 1 root field 0 Jan 13 20:15 stable
drwxrwxrwt 2 root wheel 512 Dec 8 00:38 vi.recover/
-rw-r--r-- 1 root field 42 Dec 8 00:32 vjunos-install.log
total files: 6