2015-04-06 Build REDFERN2 on Victoria

Overview

Following the success of creating the first node of the REDFERN cluster ( REDFERN1 ), I went ahead with the creation of the second node ( REDFERN1 ).

References

• Xen Project Wiki
• xl
• Michael Kerrisk - man7.org
• dd
• hostname
• ping
• printf
• uuidgen

Procedure

In general, I followed the same procedure as described in Build REDFERN1 on Victoria .

Shutdown REDFERN1

In order to avoid any conflicts over the VNC console, I shutdown REDFERN1 as follows:

xl shutdown $(xl domid redfern1)

Instead of using xl list to find the domain id of REDFERN1 , before issuing the xl shutdown command, I fold these two (2) steps into one (1).

Create Local Disk for REDFERN2

As for REDFERN1 , I created a 50G disk for use by the operating system for REDFERN2 as follows:

dd bs=1G count=50 if=/dev/zero of=/OVS/running_pool/REDFERN/redfern2/root_disk &

Create XEN Configuration File for REDFERN1

cat <<DONE >redfern2.hvm
# =====================================================================
# HVM guest configuration for REDFERN1
# Generated $(date +"%F %T")
# =====================================================================
#
# This is a fairly minimal example of what is required for an
# HVM guest. For a more complete guide see xl.cfg(5)
# This configures an HVM rather than PV guest
builder = "hvm"

# Guest name
name = "redfern2"

# 128-bit UUID for the domain as a hexadecimal number.
# Use "uuidgen" to generate one if required.
uuid = "$(uuidgen)"

# Initial memory allocation (MB)
memory = 4096

# Number of VCPUS
vcpus = 2

# Network devices
# A list of 'vifspec' entries as described in
# docs/misc/xl-network-configuration.markdown
vif = [
    'mac=00:16:3E:00:00:12,bridge=xenbr0',
    'mac=00:16:3E:00:00:13,bridge=xenbr1',
    'mac=00:16:3E:00:00:14,bridge=xenbr2',
    'mac=00:16:3E:00:00:15,bridge=xenbr3'
    ]

# Disk Devices
# A list of 'diskspec' entries as described in
# docs/misc/xl-disk-configuration.txt
disk = [
    '/OVS/running_pool/REDFERN/redfern2/root_disk,raw,xvda,rw',
    '/OVS/iso_pool/V46135-01.iso,raw,xvdc,ro,cdrom',
    '/OVS/running_pool/REDFERN/shared/DATA_01,raw,xvdd,rw',
    '/OVS/running_pool/REDFERN/shared/FRA_01,raw,xvde,rw',
    '/OVS/running_pool/REDFERN/shared/REDO1_01,raw,xvdf,rw',
    '/OVS/running_pool/REDFERN/shared/REDO2_01,raw,xvdg,rw',
    '/OVS/running_pool/REDFERN/shared/VOTE_01,raw,xvdh,rw'
    ]

# Guest VGA console configuration, either SDL or VNC
vnc = 1
vnclisten = "0.0.0.0"
vncdisplay = "4"
DONE

The MAC addresses for the NICs were obtained from the listing on Victoria VM Resources .

Complete Network Configuration

Using the example in Set Up XEN Network , I ran the following script, on REDFERN1 , to populate the device descriptions for the four (4) Ethernet NICs:

cd /etc/sysconfig/network-scripts
for iface in 0 1 2 3
do
nw=$(((iface + 1)))
nic=$(((18 + iface)))
ifacename=eth${iface}
uuid=$(uuidgen)
hwaddr=$(printf "00:16:3e:00:00:%0.2X" ${nic})
# ==== Create Interface
cat <<DONE >ifcfg-${ifacename}
# -----------------------------------------------------------------------------
# NIC ${ifacename}
# Generated $(date +"%F %T")
# -----------------------------------------------------------------------------
# Device identification
DEVICE="${ifacename}"
UUID="${uuid}"
HWADDR="${hwaddr}"
# Device options
BOOTPROTO="static"
TYPE="Ethernet"
ONBOOT="yes"
DELAY="0"
NM_CONTROLLED="no"
# IPV4 Networking
IPADDR="192.168.${nw}.141"
NETMASK="255.255.255.0"
GATEWAY="192.168.1.1"
# DNS
DNS1="192.168.1.252"
DNS2="192.168.1.1"
PEERDNS="yes"
DOMAIN="yaocm.id.au"
DONE
done

Then I brought this NICs up as follows:

ifup eth0
ifup eth1
ifup eth2
ifup eth3

ping confirmed connectivity on both REDFERN2 and VICTORIA :

ping -c 1 192.168.1.141
ping -c 1 192.168.2.141
ping -c 1 192.168.3.141
ping -c 1 192.168.4.141

Rename Host

Because I did not set up networking during OEL7 installation, the hostname was left as localhost.hostname . To rectify this, I used the following command:

hostname redfern2.yaocm.id.au

And I updated /etc/hostname.

I started REDFERN1 and made a similar change there as well.