NCP-DB-6.10 · Question #133
An administrator needs to provision PostgreSQL instance from a software profile. The software profile was created from a VM with services such as etcd, HAProxy, Patroni and keepalived installed…
The correct answer is C. Provision an HA instance with the services disabled. To provision a PostgreSQL HA instance from a software profile created from a VM with services like etcd, HAProxy, Patroni, and keepalived installed, the administrator must ensure the instance aligns with NDB's HA framework. These services (e.g., Patroni for PostgreSQL HA…
Question
An administrator needs to provision PostgreSQL instance from a software profile. The software profile was created from a VM with services such as etcd, HAProxy, Patroni and keepalived installed. What should the administrator perform to successfully provision an HA instance?
Options
- AProvision an HA instance with the services enabled.
- BDisable the services, create a software profile version, and provision an HA instance.
- CProvision an HA instance with the services disabled.
- DEnable the services, create a software profile version, and provision an HA instance.
How the community answered
(38 responses)- A13% (5)
- B8% (3)
- C74% (28)
- D5% (2)
Explanation
To provision a PostgreSQL HA instance from a software profile created from a VM with services like etcd, HAProxy, Patroni, and keepalived installed, the administrator must ensure the instance aligns with NDB's HA framework. These services (e.g., Patroni for PostgreSQL HA management, HAProxy for load balancing) may conflict with NDB's built-in HA mechanisms. Provisioning an HA instance with these services disabled allows NDB to manage HA using its native replication and failover capabilities (e.g., streaming replication), avoiding duplication or interference from the VM's pre-installed services.
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