Configuring the OS

Prior to installing LifeKeeper, configure the OS for the three virtual machines that you have created.

Logging In to a Virtual Machine

Perform the following steps on both cluster nodes and clients.

Select Azure Portal > Virtual machines > Overview > Connect and review the information required for the connection.

Using terminal software (Putty, Tera Term, etc.) on the local PC, SSH to the public IP of the virtual machine with the account created when creating the virtual machine.

Log in to the virtual machine. (The screenshot below displays what you’ll see when you login to Putty for the first time. Click Yes to Proceed.)

Set it up for subsequent use by root. Change to root privileges.

Set the root password.

Allow root login.

Launch another window with the terminal software and confirm that you can log in as root (do not close the terminal window that you have been using).

After successfully logging in, perform all subsequent tasks as root.

Fixing NIC Addresses

The NIC address is fixed to prevent it from being updated when the Azure infrastructure is updated. Make the following settings on both cluster nodes.

Display the NIC information of the virtual machine and take a note of each interface name and MAC address.

By default, there is only a network configuration file for eth0, so create a network configuration file for eth1.

Edit the eth0 and eth1 configuration files. For HWADDR, use the value you took a note in the previous step.

SELinux

Disable SELinux. Make the following settings on both cluster nodes.

Open the following file.

Change the following parameters from “enforcing” to “disabled” and save.

Reboot the virtual machine for the settings to take effect.

Confirm that SELinux is disabled.

Firewall

Since LifeKeeper uses a specific port, refer to Running LifeKeeper with a Firewall to change the OS firewall configuration.

Disable the firewall. Configure the following settings on both cluster nodes.

Execute the following commands.

Address Conversion

Configure the following settings at the same time.

To enable communication to the VIP, the destination address of the packet for port 1521 where the load is balanced by ILB is converted to [VIP protected with IP resources].

Convert the source address of the ICMP packet to [Private IP address of Azure] so that the monitoring process of IP resources can be performed successfully.

Make the following settings on both cluster nodes.

Install the IP tables package.

Enable IP tables.

Make sure the IP tables are enabled.

Configure the IP tables.

Execute the following command on the active node (lk4lnode1):

Execute the following command on the standby node (lk4lnode02):

Confirm that the ip table settings have been added. The following is an example of the active node.

Reboot the virtual machine for the settings to take effect.

GUI Connection Settings

By default, Azure virtual machines do not have a GUI environment installed. We need to set up an X11 environment on the cluster nodes and a GUI environment on the client to use the LifeKeeper GUI.

Make the following settings on both cluster nodes.