CentOS.md

6.x Setup

Set static ip

vim /etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE=eth0
HWADDR=08:00:27:90:69:AB
TYPE=Ethernet 
ONBOOT=yes
NM_CONTROLLED=no
BOOTPROTO=static
IPADDR=192.168.56.100
NETMASK=255.255.255.0

DNS

vim /etc/resolv.conf

nameserver 4.2.2.2

Change NIC name

vim /etc/udev/rules.d/70-persistent-net.rules

Change hostname

vim /etc/networks

NFS

master

start relevant services

/etc/init.d/rpcbind start
/etc/init.d/nfs start
/etc/init.d/nfslock start 
chkconfig rpcbind on
chkconfig --level 2345 nfs on
chkconfig nfslock on 
chkconfig --list | grep nfs

vim /etc/exports

/home 192.168.56.0/24(rw,no_root_squash,async)

mount

exportfs -arv

slave

start relevant services: rpcbind nfslock
vim /etc/fstab

master:/home /home nfs

YUM Repo

List current status

yum repolist all

Disable repos

yum-config-manager --disable base extras updates

Enable repos

yum-config-manager --enable c6-media

Install compiler

yum install gcc gcc-c++ gcc-gfortran

Source Network Address Translation (sNAT)

Goal: Slave node with only one network interface (eth0: 192.168.0.101) wants to access the internet via master node who has two network interfaces, internal (eth0: 192.168.0.100) and external (eth1: 217.33.156.23).

• Commands on master node

echo "1" > /proc/sys/net/ipv4/ip_forward
iptables -A INPUT -i eth0 -j ACCEPT
iptables -t nat -A POSTROUTING -s 192.168.0.0/24 -o eth1 -j MASQUERADE

• Commands on slave node

route add default gw 192.168.0.100 

Credit to vbird @ http://linux.vbird.org/linux_server/0250simple_firewall.php

Install InfiniBand Network

Understand InfiniBand doc Get info on hardware (Mellanox NIC)

# lspci | grep Mellanox
01:00.0 Network controller: Mellanox Technologies MT27500 Family [ConnectX-3]

Driver

Get it / Installtion Guide

Subnet Manager

OpenSM

https://docs.mellanox.com/pages/viewpage.action?pageId=12004991

8.0

Install Extra Packages for Enterprise Linux

dnf install epel-release -y

Install screen

dnf install screen