Installation guide

2. Update the ccs cluster configuration:

# ccs_tool update /etc/cluster/cluster.conf

The <cluster> tag should define the following attributes:

Attribute Description

config_version Version number of the configuration

Name The name of the cluster

5.5.1 CMAN / OpenAIS

The OpenAIS daemon aisexec is started and configured by CMAN. Typically, all work is

performed within the cman init script. The following command can be used to start the

aisexec daemon:

# cman_tool join -w

Please consult the cman_tool manpage for detailed information.

The CMAN/OpenAIS portion within the cluster configuration file is defined within the <cman>

tag. The following attributes should be taken into consideration:

Attribute Description

expected_votes Number of votes used to calculate the quorum

two_node Special configuration option for 2-node clusters

without a quorum disk (set to 1 to enable)

5.5.2 Qdisk

If the use a quorum device is intended, the following steps must be performed:

1. Format a shared disk partition as quorum disk:

# mkqdisk -c <device> - l <label>

2. Add a <quorumd> configuration tag to the cluster configuration file.

3. Optionally define helpful heuristics for qdiskd verification purposes

The <quorumd> tag should define the following attributes:

Attribute Description

interval The frequency of read/write cycles, in seconds.

tko The number of cycles a node must miss in order to be

declared dead.

votes The number of votes the quorum daemon advertises