Difference between revisions of "Pumpkin"

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Pumpkin is our new 8 CPU 24 disk monster machine. It is really, really nice. Pumpkin used to have Xen running, but now it is just running the standard 64-bit version of RHEL 5.3.
+
Pumpkin is our new 8 CPU 24 disk monster machine. It is really, really nice. Pumpkin runs Xen. It is 64-but CENTOS-7
 
[[Image:pumpkins.jpg|thumb|200px|Pumpkins]]
 
[[Image:pumpkins.jpg|thumb|200px|Pumpkins]]
 
= Hardware Details =
 
= Hardware Details =
Line 29: Line 29:
 
= Network Configuration =
 
= Network Configuration =
  
−
The network card eth2 no longer works, and is unused.  
+
The network card eth2 no longer works, and is unused. <== needs  verification:
−
 
+
    4: wlp6s0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN qlen 1000
−
*IP Address Farm: 10.0.0.243 (eth0)
+
    link/ether a4:c4:94:1f:6b:cf brd ff:ff:ff:ff:ff:ff
−
<em>ifcfg-farm</em>
 
−
  DEVICE=eth0
 
−
  BOOTPROTO=none
 
−
  ONBOOT=yes
 
−
  HWADDR=00:e0:81:79:50:bd
 
−
  TYPE=Ethernet
 
−
  USERCTL=no
 
−
  IPV6INIT=no
 
−
  PEERDNS=yes
 
−
  NETMASK=255.255.255.0
 
−
  IPADDR=10.0.0.243
 
−
 
 
−
*IP Address UNH: 132.177.88.228 (eth1)
 
−
<em>ifcfg-unh</em>
 
−
  DEVICE=eth1
 
−
  BOOTPROTO=none
 
−
  ONBOOT=yes
 
−
  DHCP_HOSTNAME=pumpkin.unh.edu
 
−
  TYPE=Ethernet
 
−
  IPADDR=132.177.88.228
 
−
  NETMASK=255.255.252.0
 
−
  GATEWAY=132.177.88.1
 
−
  USERCTL=no
 
−
  IPV6INIT=no
 
−
  PEERDNS=yes
 
−
  HWADDR=00:e0:81:79:50:bf
 
  
 +
*IP Address Farm: 10.0.0.243 (farm)
 +
*IP Address UNH: 132.177.88.228 (unh)
 
*IP Address RAID: 10.0.0.99 [http://10.0.0.99]
 
*IP Address RAID: 10.0.0.99 [http://10.0.0.99]
−
Not sure about this
 
  
 
=Software and Services=
 
=Software and Services=
Line 66: Line 41:
 
==IPTables==
 
==IPTables==
  
−
Pumpkin uses the standard [[iptables]] configuration. Note that eth0 and eth1 are both farm ports and should be configured accordingly.
+
Pumpkin uses the standard [[iptables]] configuration.
  
 
==Splunk==
 
==Splunk==
Line 74: Line 49:
 
==[[NFS]]==
 
==[[NFS]]==
  
−
Pumpkin shares two data stores (/data1 and /data2) over [[NFS]]. They can be accessed at /net/data/pumpkin from any machine.
+
Pumpkin shares two data stores (/data and /scratch) over [[NFS]]. They can be accessed at /net/data/pumpkin and /net/data/scratch from any machine.
  
−
===/etc/exports===
+
= RAID =
 +
The RAID is currently split.
 +
; Disk 1 to 17 @ 4TB
 +
* Disk 17 is hot spare
 +
* RAID Set #00
 +
* Volume: data lun(0/0/0) is RAID6 = 56 TB
 +
* Translates to /dev/sda1 mounted on /data
 +
; Disk 19 to 24 @ 750 GB
 +
* RAID Set #01
 +
* Volume: scratch lun(0/0/1) is RAID0 = 4.5 TB
 +
* Translates to /dev/sdb1 mounted on /scratch
 +
; Disk18 is N/A 
  
−
<pre>
 
−
/data1 @servers(rw,sync) @npg_clients(rw,sync) \
 
−
10.0.0.0/24(rw,no_root_squash,sync)
 
−
/data2 @servers(rw,sync) @npg_clients(rw,sync) \
 
−
10.0.0.0/24(rw,no_root_squash,sync)
 
−
</pre>
 
−
 
−
= RAID =
 
−
The RAID is currently split. This allows for much easier maintenance and, in the future, possible upgrades.
 
−
; Disk 1 to 11 : RAID Set 0, which holds the RAID Volumes: System (300GB, RAID6, SCSI:0.0.0), System1(300GB, RAID6, SCSI:0.0.1), Data1 (6833GB, RAID5, SCSI:0.0.2)
 
−
; Disk 11 to 22 : RAID Set 1, which holds the RAID Volume: Data2 (7499GB, RAID5, SCSI:0.0.3)
 
−
; Disk 23 and 24 : Passthrough (single disks) at SCSI:0.0.6 and SCSI:0.0.7. These can be used as spares, as backup, or to expand the other RAID sets later on. Currently they are seen as /dev/sde* and /dev/sdf*. /dev/sdf and /dev/sde are currently used for Virtual Systems.
 
 
The RAID card can be monitored at http://10.0.0.99/ login as "admin" with a password that is described on the [[RAID]] page.
 
The RAID card can be monitored at http://10.0.0.99/ login as "admin" with a password that is described on the [[RAID]] page.
−
* To use this card with Linux you need a driver: arcmsr. This '''must be part of the initrd''' for the kernel, else you cannot boot from the RAID. You can also install from the CDs, if you have a driver floppy. It will then add the arcmsr driver into the initrd for you. You will still '''always need to have this driver!'''
 
−
* The kernel module can be built from the sources located on /dev/sdf in ''/usr/src/kernels/Acera_RAID''. Just run make.
 
−
 
−
There exists a temporary drive which holds a RHEL5 distro and the original RHEL4 distro from the manufacturer. It is currently disconnected from pumpkin.
 
  
 +
== Software RAID ==
 +
There are 2 internal drives in Pumpkin forming a software RAID.
 +
Note these are *not identical* partitions on the drives, so the RAID does not look symmetrical. Blame the installer.
  
−
= Removing Xen =
+
Model: ATA WDC WD7500AAKS-0 (scsi)
−
1. Install the latest version of kernel that is not xen, you might have to do a yum search kernel to find the specific name of a non-xen kernel and install it.
+
Disk /dev/sdc: 750GB
−
 
+
Sector size (logical/physical): 512B/512B
−
2. Now remove the kernel-xen with this command and make sure to enter the second one.
+
Partition Table: gpt
−
   yum groupremove Virtualization
+
Disk Flags:
−
   yum remove kernel-xenU
+
−
3. Then restart with the normal non-xen kernel and proceed to do upgrades with yum update command.
+
Number  Start  End    Size    File system  Name                  Flags
 +
  1     1049kB  79.7MB  78.6MB  fat16        EFI System Partition  boot
 +
  2     79.7MB  300GB  300GB                                      raid
 +
  3      300GB  550GB  250GB                                      raid
 +
  4      550GB  650GB  100GB                                      raid
 +
  5      650GB  718GB  67.5GB                                    raid
 +
   6      718GB  750GB  32.0GB                                    lvm
 +
   7      750GB  750GB  251MB  ext4                              raid
 +
 +
Model: ATA WDC WD7500AAKS-0 (scsi)
 +
Disk /dev/sdd: 750GB
 +
Sector size (logical/physical): 512B/512B
 +
Partition Table: gpt
 +
Disk Flags:
 +
 +
Number  Start  End    Size    File system  Name  Flags
 +
  1      1049kB  300GB  300GB                      raid
 +
  2      300GB  550GB  250GB                      raid
 +
  3     550GB  650GB  100GB                      raid
 +
  4      650GB  718GB  67.5GB                    raid
 +
  5      718GB  750GB  32.0GB                    lvm
 +
  6      750GB  750GB  251MB  ext4              raid
 +
  
 +
Personalities : [raid1]
 +
md123 : active raid1 sdc5[0] sdd4[1]
 +
      65853440 blocks super 1.2 [2/2] [UU]
 +
      bitmap: 0/1 pages [0KB], 65536KB chunk
 +
 +
md124 : active raid1 sdc4[0] sdd3[1]
 +
      97655808 blocks super 1.2 [2/2] [UU]
 +
      bitmap: 0/1 pages [0KB], 65536KB chunk
 +
 
 +
md125 : active raid1 sdc2[0] sdd1[1]
 +
      292968448 blocks super 1.2 [2/2] [UU]
 +
      bitmap: 2/3 pages [8KB], 65536KB chunk
 +
 +
md126 : active raid1 sdc3[0] sdd2[1]
 +
      244140032 blocks super 1.2 [2/2] [UU]
 +
      bitmap: 0/2 pages [0KB], 65536KB chunk
 +
 +
md127 : active raid1 sdc7[0] sdd6[1]
 +
      244672 blocks super 1.0 [2/2] [UU]
 +
      bitmap: 0/1 pages [0KB], 65536KB chunk
 +
 +
 
= To Do =
 
= To Do =
−
* There appears to be a [https://bugzilla.redhat.com/show_bug.cgi?id=179422 bug] in the driver (forcedeth) for the Nvidia Ethernet devices (eth0 and eth2). It seems to occasionally cause the network interface to freeze up during large nfs transfers. The bug report suggests that it can be fixed a fix by adding this option to the modprobe.conf file:
 
−
 
−
options forcedeth max_interrupt_work=10
 
−
 
−
The value given seems to vary from one discussion to the next. Some say they still get errors at 10 and 15, but not at 20. We should investigate this potential fix to see if it solves the issues with the network interfaces freezing up. For now the farm interface is set to the device with the Intel chipset (eth1) since most large data transfers happen over the back end. There is also a second farm interface set up (eth0 at 10.0.0.242) in case one goes down. This should mitigate the problem in the short term.
 
−
 
−
* There must be other things....
 
  
 
= Done =
 
= Done =
−
** Pumpkin's [[iptables]] seem messed up after this morning's (1/8/2008) GRUB trouble. With the old config (pepper's), iptables wouldn't let anything in at all, it seemed (specifically things like pingbacks, LDAP&hellip;). I've copied roentgen's ''/etc/sysconfig/iptables-npg'' to pumpkin for now, and everything seems to be working as usual. Previously it had a copy of pepper's, and pepper works, so I wonder what the real problem is. <font color="green">'''This was the wrong iptables!'''. I fixed it with a new set.</font>
 
−
* Sane iptables using ldap.
 
−
* Setup ethernet.
 
−
* Setup RAID volumes.
 
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* Setup partitions and create file systems.
 
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* Move the system to System drive and remove the current temp drive.
 
−
* Setup mount points for the data drives.
 
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* Setup LDAP for users to log in.
 
−
* Setup [[Exports]], so other systems can see the drives. '''There were issues with firewall, so I modeled the firewall after taro's.''' Seems to be working, I can successfully <code>ls /net/data/pumpkin1</code> and <code>ls /net/data/pumpkin2</code> on einstein.
 
−
* Setup autofs so that it can see other drives. '''What other drives? It's working for einstein:/home''' Other drives such as data drives
 
−
* Setup [[smartd]] so we will know when a disk is going bad. '''This can be done inside the RAID card''' using a system to send SNMP and EMAIL. but it needs to be done. '''E-mail seems to be set up, let's see if we get any through npg-admins'''
 
−
* Restrict access  (/etc/security/access.conf)
 
−
* Setup sudo on both pumpkin and corn.
 
−
* Add the new systems to the lentil backup script. '''They're on there; lentil just needs the right SSH keys to rsync them.'''
 
−
* Setup SNMP for cacti monitoring.
 
−
* Setup sensors.
 

Revision as of 17:01, 10 August 2017

Pumpkin is our new 8 CPU 24 disk monster machine. It is really, really nice. Pumpkin runs Xen. It is 64-but CENTOS-7

Pumpkins

Hardware Details

  • Microway Quote # MWYQ9518-03 purchased 10/22/2007 for $18260.
  • Sales contact: Eliot Eshelman
  • Microway 5U 4-Way Opteron Server with up to 24 Drives
  • 5U Storage Chassis with 24 SAS/SATA-II Hot-Swap Drive Bays with SATA Multilane Backplane (I think it is a Chenbro case)
  • 1350 Watt Hot Swap Redundant Power Supply
  • Microway Navion-T (TM) Quad Opteron Motherboard (Tyan S4985):
    • Four sockets for Socket F 8000 series processors
    • Nvidia nForce Pro 2200 + 2050
    • Four banks of memory (16 DIMM slots)
    • Supports up to 64GB of DDR2-667 memory
    • Two x16 PCI Express, Two x4 PCI Express,
    • One PCI 32 bit expansion slots
    • Integrated dual Marvell 88E1111 GbE ports
    • Integrated Intel 82541Pl GbE Port
    • SIS/Xabre Integrated Graphics 16MB
    • Integrated SATA-2 Controller (8 ports)
  • 4x AMD Dual Core Socket F Opteron 8222 3.0 GHz, 1 MB Cache / core, 95 watts
  • 8x 2GB DDR2 667 MHz ECC/Registered Memory
  • 16x 750 GB Seagate Barracuda ES Nearline SATA/300 ST3750640NS 16MB Cache, 3Gb/s, NCQ, 7200rpm, 1.2 million hours MTBF
  • Areca ARC-1280 24 port SATA II Raid - PCI Express x8
  • Areca ARC-6120 Battery Backup
  • 6x Mini-SAS to ML backplane Cable .5M - 4 SATA Drives
  • Pioneer DVR-112 Dual Layer DVD/CD writer Internal (Black) 18x write DVD-R/+R, 10x write Dual Layer DVD-R/+R
  • Tyan M3291 IPMI card (REMOVED)

Network Configuration

The network card eth2 no longer works, and is unused. <== needs verification: 

   4: wlp6s0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN qlen 1000
   link/ether a4:c4:94:1f:6b:cf brd ff:ff:ff:ff:ff:ff
  • IP Address Farm: 10.0.0.243 (farm)
  • IP Address UNH: 132.177.88.228 (unh)
  • IP Address RAID: 10.0.0.99 [1]

Software and Services

IPTables

Pumpkin uses the standard iptables configuration.

Splunk

Pumpkin is the master Splunk node and stores all of the splunk data in /data1/splunk. If you want to access the Splunk web interface it is at https://pumpkin.unh.edu:8000 (if you're connected via the Farm), or you can forward port 8000 over SSH.

NFS

Pumpkin shares two data stores (/data and /scratch) over NFS. They can be accessed at /net/data/pumpkin and /net/data/scratch from any machine.

RAID

The RAID is currently split.

Disk 1 to 17 @ 4TB
  • Disk 17 is hot spare
  • RAID Set #00
  • Volume: data lun(0/0/0) is RAID6 = 56 TB
  • Translates to /dev/sda1 mounted on /data
Disk 19 to 24 @ 750 GB
  • RAID Set #01
  • Volume: scratch lun(0/0/1) is RAID0 = 4.5 TB
  • Translates to /dev/sdb1 mounted on /scratch
Disk18 is N/A

The RAID card can be monitored at http://10.0.0.99/ login as "admin" with a password that is described on the RAID page.

Software RAID

There are 2 internal drives in Pumpkin forming a software RAID. Note these are *not identical* partitions on the drives, so the RAID does not look symmetrical. Blame the installer. 

Model: ATA WDC WD7500AAKS-0 (scsi)
Disk /dev/sdc: 750GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags: 

Number  Start   End     Size    File system  Name                  Flags
 1      1049kB  79.7MB  78.6MB  fat16        EFI System Partition  boot
 2      79.7MB  300GB   300GB                                      raid
 3      300GB   550GB   250GB                                      raid
 4      550GB   650GB   100GB                                      raid
 5      650GB   718GB   67.5GB                                     raid
 6      718GB   750GB   32.0GB                                     lvm
 7      750GB   750GB   251MB   ext4                               raid

Model: ATA WDC WD7500AAKS-0 (scsi)
Disk /dev/sdd: 750GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags: 

Number  Start   End    Size    File system  Name  Flags
 1      1049kB  300GB  300GB                      raid
 2      300GB   550GB  250GB                      raid
 3      550GB   650GB  100GB                      raid
 4      650GB   718GB  67.5GB                     raid
 5      718GB   750GB  32.0GB                     lvm
 6      750GB   750GB  251MB   ext4               raid


Personalities : [raid1]
md123 : active raid1 sdc5[0] sdd4[1]
      65853440 blocks super 1.2 [2/2] [UU]
      bitmap: 0/1 pages [0KB], 65536KB chunk

md124 : active raid1 sdc4[0] sdd3[1]
      97655808 blocks super 1.2 [2/2] [UU]
      bitmap: 0/1 pages [0KB], 65536KB chunk
 
md125 : active raid1 sdc2[0] sdd1[1]
      292968448 blocks super 1.2 [2/2] [UU]
      bitmap: 2/3 pages [8KB], 65536KB chunk 

md126 : active raid1 sdc3[0] sdd2[1]
      244140032 blocks super 1.2 [2/2] [UU]
      bitmap: 0/2 pages [0KB], 65536KB chunk

md127 : active raid1 sdc7[0] sdd6[1]
      244672 blocks super 1.0 [2/2] [UU]
      bitmap: 0/1 pages [0KB], 65536KB chunk

To Do

Done

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