Cluster Verification Utility

Xiaowei Sep.14th 2007

Introduction

This yet-to-be-named tool is expected to read the /etc/ocfs2/cluster.conf and verify its contents. It will use ssh to ensure the validity of the hostnames and the ip addresses.

Content to verify

1. Effectivity of Identifiers,now including: node,cluster,ip_port,ip_address,number,name.

• The check will be non-case-sensitive.

2. Effectivity of values.

• integrality

• For each node,the configure must define this five attributes : ip_port,ip_address,number,name and cluster.

  node sections

• ip_port : should be a integer between 0 and 65535,or between 1024 and 65535 for stricter range.
• ip_address : should in the format of ipv4 address xxx.xxx.xxx.xxx,four parts of integer between 1 and 254.Also to check if one node is up or down.Just report it when a node is down.
• number : should be a integer,uniquely in one cluster.
• name : a hostname,obeying the host naming rules.And should be the same with the hostname read from the host.Use ssh to validate that.
• cluster : should obey the cluster naming rules,and the cluster should in one of the of cluster: sections.

  cluster sections

• node_count : integer, should equal to the number of the nodes whose cluster=this cluster.name
• name : should obey the identifiers naming rules.

  consistency of the cluster.conf files between nodes

• compare the configure file on up nodes with this machine running this script.If found newer version report it.

3. Data structures.

• cluster_config
• ocfs2_cluster
• ocfs2_node

Implementation

1.C program.

2.Shell script.

• Coding Complete,Send out to the ocfs2-tools-devel Mail list. Check attachment.