Configurando um LVS no CentOS

Question

Eu tenho um cluster de 3 nós (servidores dedicados de um provedor) do CentOS 7.x. Estou tentando configurar o LVS usando o link aqui .

Cada uma das minhas máquinas já possui 3 endereços IP alias extras atribuídos a ela. Eu quero configurar o LVS em uma dessas máquinas. Minha pergunta é o que devo usar como o Virtual IP (VIP) na Piranha Configuration Tool? Posso pegar um dos alias IPs para aquela máquina que eu quero que o LVS esteja ligado?

    

Answer 1

Você precisa escolher um endereço IP diferente para o seu VIP.

Por exemplo, se você tem 3 servidores reais com ips 192.168.0.11,192.168.0.12, 192.168.0.13, você gostaria de usar 192.168.0.10 como seu VIP.

Então você precisa configurar o VIP em cada servidor.

 /sbin/ip addr add 192.168.100.30 dev eth1

Você pode seguir este link se quiser:

http://kezhong.wordpress.com/2010/03/28/setup-linux-loadbalancer-with-piranha-and-lvs-on-centos-5-4/

Aí vem o texto do tutorial (:

Test environment:

LVS Router 1: eth0: 192.168.26.201
LVS Router 2: eth0: 192.168.26.202
Real Server 1: eth0: 192.168.26.211
Real Server 2: eth0: 192.168.26.212       
VIP: 192.168.26.200
gateway: 192.168.26.1

Install piranha and ipvsadm packages on the LVS Routers

# yum install ipvsadm
# yum install piranha

Configure Services on the LVS Routers

# chkconfig pulse on
# chkconfig piranha-gui on
# chkconfig httpd on

Set a Password for the Piranha Configuration Tool

# piranha-passwd

Turn on Packet Forwarding on the LVS Routers

# echo 1 > /proc/sys/net/ipv4/ip_forward

Start the Piranha Configuration Tool Service

Change the SELinux mode to permissive. If you didn’t do it, it would show the error message as below when you start the piranha-gui service.

Starting piranha-gui: (13)Permission denied: make_sock: could not bind to address [::]:3636 (13)Permission denied: make_sock: could not bind to address 0.0.0.0:3636 No listening sockets available, shutting down Unable to open logs

# setenforce 0
# service httpd start
# service piranha-gui start

Configure the LVS Routers with Piranha Configuration Tool

Open http://192.168.26.201:3636 in a Web browser to access the Piranha Configuration Tool. Click on the Login button and enter piranha for the Username and the administrative password you created in the Password field.

Click on the GLOBAL SETTINGS panel, and input the primary server public IP, and then click the ACCEPT button.

Click on the REDUNDANCY panel, and input the redundant server public IP, and then click the ACCEPT button.

Click on the VIRTUAL SERVERS panel, add a server, edit it, and activate it.

Clicking on the REAL SERVER subsection link at the top of the panel displays the EDIT REAL SERVER subsection. Click the ADD button to add new servers, edit them and activate them.

Copy the lvs.cf file to another LVS router.

# scp /etc/sysconfig/ha/lvs.cf [email protected]:/etc/sysconfig/ha/lvs.cf

Start the pulse services on the LVS Routers

# service pulse restart