5.5.2. Nodes

Provides detailed information for each node in the cluster. On the left hand column, you can find a list of all nodes that are members of the cluster including ClusterControl node. If you added slaves to your cluster through ClusterControl, these will also be listed.

5.5.2.1. Nodes Monitoring

The node on the list will appear in red colour to indicate it is unhealthy. The tabs show performance and resource usage for a specific node. There are also database specific tabs depending on the type of database running on the host:

  • Overview
    • Provides a summary of host information and statisic histogram including CPU, disk, network and memory usage.
    • Database node status indicator:
    Status Description
    OK Indicates the node is working fine.
    WARNING Indicates the node is degraded and not performing as expected.
    PROBLEMATIC Indicates the node is down or unreachable.
  • Top
    • Provides a snapshot view of processes running on the host, similar to top command in Linux.
  • DB Performance
    • Overview of chosen database performance counters shown in graph.

5.5.2.2. Nodes Management

The remove icon will only appear when you rollover the mouse pointer on the node icon in the left-hand column. This removes the database node from the cluster.

Note

You can monitor job’s progress at ClusterControl > Logs > Jobs.

These are specific functions available for PostgreSQL standalone and replication nodes:

  • Shutdown Node
    • Stops the database instance on this node. This is not a system shut down.
  • Reboot Host
    • Initiates a system reboot on this host.
  • Start Node
    • This option is only available if the node is down. It starts the database instance on this node.