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Martin Hope
GnP
Asked: 2015-08-06 08:32:09 +0800 CST
  • 37

Yesterday I did a quick reinstall of a (physical) server in the datacenter, and since I was short on time and with no easy access to our database I just assigned it an IP that I knew was available and would allow me later access to assign the correct address and continue provisioning from a warmer place.

Today I logged into the server (at 172.16.130.10/22) and did the following:

ip addr add 172.16.128.67/22 dev eth0

From a terminal on my local workstation I checked it responded to ping on the new address and logged in through it:

$ ping 172.16.128.67
PING 172.16.128.67 (172.16.128.67) 56(84) bytes of data.
64 bytes from 172.16.128.67: icmp_req=2 ttl=62 time=3.61 ms
64 bytes from 172.16.128.67: icmp_req=3 ttl=62 time=4.87 ms
^C
$ ssh 172.16.128.67

So far so good, I was connected through the new IP address and the old one was no longer necessary. I went ahead and removed it:

ip addr del 172.16.130.10/22 dev eth0

But as soon as I hit Enter my SSH session froze and I was no longer able to connect. I had to request an on-site operator to reboot the server for me.

Where did I go wrong? Why would removing that address kill my connection?

linux
Martin Hope
GnP
Asked: 2015-01-13 09:07:22 +0800 CST
  • 4

I'm trying to monitor an HP Smart Array controller using nagios. I have 4 disks on 2 RAID1 arrays, so 2 disks per RAID1.

I installed nrpe-server and nrpe-plugins and I'm using the almighty check_raid plugin, but it seems to only be seeing my first array and not the second:

# /usr/lib/nagios/plugins/check_raid
OK: cciss:[/dev/cciss/c0d0: (Smart Array E200i) RAID 1 Volume 0 status: OK, /dev/cciss/c0d0: (Smart Array E200i) RAID 1 Volume 1 status: OK]

cciss_vol_status reports correctly for both arrays:

# cciss_vol_status /dev/cciss/c0d0
/dev/cciss/c0d0: (Smart Array E200i) RAID 1 Volume 0 status: OK. 
/dev/cciss/c0d0: (Smart Array E200i) RAID 1 Volume 1 status: OK. 
# cciss_vol_status /dev/cciss/c0d1
/dev/cciss/c0d1: (Smart Array E200i) RAID 1 Volume 0 status: OK. 
/dev/cciss/c0d1: (Smart Array E200i) RAID 1 Volume 1 status: OK.

How do I get check_raid to report on both arrays?

The server is an HP Proliant DL360 G5 with a Smart Array E200i controller. It's currently running debian wheezy.

linux