361.3 Failover Clusters (weight: 8) LPIC-3-HIGH-AVAILABILITY Practice Questions (Page 9)

Questions 41–45

1. 41foundation · easy

   What is the purpose of the Split Brain Detector (SBD) in a Pacemaker cluster?

   • ATo provide a shared storage mechanism for cluster resources
   • BTo monitor the health of cluster resources
   • CTo synchronize the cluster configuration across nodes
   • DTo detect and prevent split-brain scenarios by using a shared storage device
   Reveal Solution Discussion Select an answer first
2. 42application · medium

   An administrator manages a Pacemaker cluster that runs a database in active/passive mode. The database resource is defined as a multi-state (master/slave) resource. The administrator wants to ensure that the master role runs on the node with the highest score from a node attribute called 'db-priority'. Which configuration achieves this?

   • ACreate a location constraint with a rule that uses the node attribute 'db-priority' and targets the master role.
   • BConfigure an order constraint between the master and slave roles.
   • CUse a colocation constraint to bind the master role to a specific resource that runs on the preferred node.
   • DSet the resource's 'master-max' parameter to 1 and let the cluster choose randomly.
   Reveal Solution Discussion Select an answer first
4. 43expert · medium

   A three-node Pacemaker cluster is being configured. The administrator wants to ensure that the cluster can tolerate the loss of one node and still maintain quorum. The default Corosync configuration is being used. What is the minimum number of votes required for the cluster to remain operational?

   • A4
   • B1
   • C2
   • D3
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5. 44application · medium

   A Pacemaker cluster has multiple administrators. The security team requires that a junior administrator can only view the cluster configuration but cannot modify it. Which configuration achieves this?

   • AUse 'pcs acl user add <user> read'.
   • BAdd the junior administrator to the 'haclient' group.
   • CCreate a Pacemaker ACL role with read-only permissions and assign it to the junior administrator's user.
   • DSet the CIB file permissions to read-only for the junior administrator.
   Reveal Solution Discussion Select an answer first
6. 45application · medium

   A Pacemaker cluster administrator needs to temporarily change the interval of a monitoring operation for a resource from 30 seconds to 60 seconds. The change must be applied without restarting the resource. Which command sequence correctly applies this change?

   • AEdit the CIB directly with 'cibadmin --replace' and then restart the cluster.
   • BUse 'pcs resource delete <resource>' and recreate it with the new interval.
   • CUse 'pcs resource op add <resource> monitor interval=60s' and then 'pcs resource refresh <resource>'.
   • DUse 'pcs resource update <resource> op monitor interval=60s'.
   Reveal Solution Discussion Select an answer first