Linux cluster commands

Linux cluster commands

Checking status of the cluster:
# clustat
# clustat -m Display status of and exit
# clustat -s Display status of and exit
# clustat -l Use long format for services

# cman_tool status Show local record of cluster status
# cman_tool nodes Show local record of cluster nodes
# cman_tool nodes -af

# ccs_tool lsnode List nodes
# ccs_tool lsfence List fence devices

# group_tool displays the status of fence, dlm and gfs groups
# group_tool ls displays the list of groups and their membership

Resource Group Control Commands:
clusvcadm -d Disable
clusvcadm -e Enable
clusvcadm -e -F Enable according to failover domain rules
clusvcadm -e -m Enable on
clusvcadm -r -m Relocate to member>
clusvcadm -R Restart a group in place.
clusvcadm -s Stop

Resource Group Locking (for cluster Shutdown / Debugging):
clusvcadm -l Lock local resource group manager.
This prevents resource groups from
starting on the local node.
clusvcadm -S Show lock state
clusvcadm -Z Freeze group in place
clusvcadm -U Unfreeze/thaw group

clusvcadm -u Unlock local resource group manager.
This allows resource groups to start on the local node.

clusvcadm -c Convalesce (repair, fix) resource group.
Attempts to start failed, non-critical resources within a resource group.
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Cluster Command Quick Reference

1)Cluster status
clustat Display the status of the cluster as viewed from the executing host

2)Cluster services administration
clusvcadm Manage services across the cluster.

3)Move a service to another node
clusvcadm –r -m

4)Stop a service
clusvcadm –d

5)Start a service
clusvcadm –e

6)Cluster configuration system
ccs_tool Online management of cluster configuration

7)Update the cluster.conf file across the cluster
ccs_tool update /etc/cluster/cluster.conf

8)Cluster Management
cman_tool Manage cluster nodes and display the current state of the cluster

9)Display status
cman_tool status

10)Fencing tools

11)Eject a node from the cluster
fence_node

12)Print fence debug messages
fence_tool dump