About the VCS configuration files

VCS configuration files include the following:

main.cf

The installer creates the VCS configuration file in the /etc/VRTSvcs/conf/config folder by default during the VCS configuration. The main.cf file contains the minimum information that defines the cluster and its nodes.

types.cf

The file types.cf, which is listed in the include statement in the main.cf file, defines the VCS bundled types for VCS resources. The file types.cf is also located in the folder /etc/VRTSvcs/conf/config.

Additional files similar to types.cf may be present if agents have been added, such as Oracletypes.cf.

/etc/default/vcsThis file stores the start and stop environment variables for VCS engine:
VCS_START—Defines the startup behavior for VCS engine after a system reboot. Valid values include:

• 1—Indicates that VCS engine is enabled to start up.
• 0—Indicates that VCS engine is disabled to start up.

VCS_STOP—Defines the shutdown behavior for VCS engine during a system shutdown. Valid values include:

• 1—Indicates that VCS engine is enabled to shut down.
• 0—Indicates that VCS engine is disabled to shut down.

The installer sets the value of these variables to 1 at the end of VCS configuration.  If you manually configured VCS, make sure you set the values of these environment variables to 1.

Note the following information about the VCS configuration file after installing and configuring VCS:

The cluster definition includes the cluster information that you provided during the configuration. This definition includes the cluster name, cluster address, and the names of users and administrators of the cluster.Notice that the cluster has an attribute UserNames. The installvcs program creates a user “admin” whose password is encrypted; the word “password” is the default password.

If you set up the optional I/O fencing feature for VCS, then the UseFence = SCSI3 attribute is present.

If you configured the cluster in secure mode, the main.cf includes the VxSS service group and “SecureClus = 1″ cluster attribute.

The installvcs program creates the ClusterService service group if you configured the virtual IP, SMTP, SNMP, or global cluster options.The service group also has the following characteristics:
The group includes the IP and NIC resources.
The service group also includes the notifier resource configuration, which is based on your input to installvcs program prompts about notification.
The installvcs program also creates a resource dependency tree.

If you set up global clusters, the ClusterService service group contains an Application resource, wac (wide-area connector). This resource’s attributes contain definitions for controlling the cluster in a global cluster environment.Refer to the Veritas Cluster Server Administrator’s Guide for information about managing VCS global clusters.

Configuring VCS

VCS configuration requires the types.cf and main.cf files on each system in the cluster. Both of the files are in the /etc/VRTSvcs/conf/config directory.

main.cf file The main.cf configuration file requires the following minimum essential elements:

• An “include” statement that specifies the file, types.cf, which defines the VCS bundled agent resources.
• The name of the cluster.
• The name of the systems that make up the cluster.

types.cf file Note that the “include” statement in main.cf refers to the types.cf file. This text file describes the VCS bundled agent resources. During new installations, the types.cf file is automatically copied in to the /etc/VRTSvcs/conf/config directory.
When you manually install VCS, the file /etc/VRTSvcs/conf/config/main.cf contains only the line:

include “types.cf”

To configure VCS manually

Log on as superuser, and move to the directory that contains the configuration file:
# cd /etc/VRTSvcs/conf/config
Use vi or another text editor to edit the main.cf file, defining your cluster name and system names. Refer to the following example.An example main.cf for a two-node cluster:

include “types.cf”
cluster VCSCluster2 ( )
system galaxy ( )
system nebula ( )

An example main.cf for a single-node cluster:

include “types.cf”
cluster VCSCluster1 ( )
system sn1

Save and close the main.cf file.

Edit the following file on each node in the cluster to change the values of the VCS_START and the VCS_STOP environment variables to 1:

/etc/default/vcs