A login appliance is a host that users use to build, launch and monitor their application(s). This host is a subset of a frontend appliance (a frontend runs several other services that are used to install and maintain all the nodes in the system).

First, we need to perform the initial installation of the login appliance. On the frontend, execute:

# insert-ethers

Select "Login" as the appliance type.

Then PXE boot the host that you want to be a login appliance.

Login hosts are generally hosts that also have a public network interface so users can directly access the login host. After the login appliance installs, to configure the public network interface on the login host, see Adding a public IP address to the second ethernet adapter on a compute node.

7.3.1. Making any Host a Submission and/or Execution Host

If you've installed a batch queueing system (e.g., by using the SGE Roll or Torque Roll), you can change any host in your system to be a submission host (a host where users can submit jobs) and/or an execution host (the queueing system schedules jobs on execution hosts).

By default, a login host is a submission host, but not an execution host. By default, a compute node is an execution host, but not a submission host.

To make a host a submission host (e.g., tile-0-0), on the frontend execute:

# rocks set host attr tile-0-0 submit_host true

Then reinstall tile-0-0.

To make a host an execution host (e.g., tile-0-0), on the frontend execute:

# rocks set host attr tile-0-0 exec_host true

Then reinstall tile-0-0.

Rocks Cluster 5.4에서 추가된 Channel Bonding 관련 내용입니다. 간단한 명령으로 채널 본딩을 구성할 수있게 되었네요..

7.4. Channel Bonding Interfaces

Channel bonding enables two or more network interfaces to act as one. The following procedure describes how to channel bond interfaces in Rocks.

We'll use the example of channel bonding two interfaces for compute-0-1. First, let's list the current configuration of the interfaces for compute-0-1:

# rocks list host interface compute-0-1

SUBNET  IFACE MAC               IP           NETMASK     MODULE NAME        VLAN OPTIONS

private eth0  00:1e:4f:b0:74:ef 10.1.255.253 255.255.0.0 tg3    compute-0-1 ---- -------

------- eth1  00:10:18:31:74:43 ------------ ----------- tg3    ----------- ---- -------

Here's what we'll do:

• Bond eth0 and eth1.

• Name the bonded channel "bond0".

• Give bond0 the IP address 10.1.255.253.

• Associate bond0 with the private network.

# rocks add host bonded compute-0-1 channel=bond0 interfaces=eth0,eth1 ip=10.1.255.253 network=private

The above command changes the interface configuraion for compute-0-1 in the following way:

# rocks list host interface compute-0-1

SUBNET  IFACE MAC               IP           NETMASK     MODULE  NAME        VLAN OPTIONS CHANNEL

private bond0 ----------------- 10.1.255.253 255.255.0.0 bonding compute-0-1 ---- ------- -------

------- eth0  00:1e:4f:b0:74:ef ------------ ----------- tg3     ----------- ---- ------- bond0  

------- eth1  00:10:18:31:74:43 ------------ ----------- tg3     ----------- ---- ------- bond0

To apply the configuration, execute:

# rocks sync config

# rocks sync host network compute-0-1

7.4.1. Adding Parameters to the Kernel Bonding Module

There are several options that can be added to the kernel bonding module (see RedHat's documentation The Channel Bonding Module for a full description of all the options).

To set options "miimon=100" and "mode=balance-rr" for the kernel bonding module associated with bond0, execute:

# rocks set host interface options compute-0-1 bond0 options="miimon=100 mode=balance-rr"

The "options" value (e.g., "miimon=100 mode=balance-rr") must be a space-separated list.

And now we see:

SUBNET IFACE MAC IP NETMASK MODULE NAME VLAN OPTIONS CHANNEL private bond0 ----------------- 10.1.255.253 255.255.0.0 bonding compute-0-1 ---- miimon=100 mode=balance-rr ------- ------- eth0 00:1e:4f:b0:74:ef ------------ ----------- tg3 ----------- ---- -------------------------- bond0 ------- eth1 00:10:18:31:74:43 ------------ ----------- tg3 ----------- ---- -------------------------- bond0

To apply the options to the bond0 interface, execute:

# rocks sync host network compute-0-1