Enum AlertEvent 

pub enum AlertEvent {
    NodeFailed {
        node_id: NodeId,
    },
    NodeRecovered {
        node_id: NodeId,
    },
    LeaderChanged {
        old_leader: Option<NodeId>,
        new_leader: NodeId,
    },
    QuorumLost {
        cluster_size: usize,
        reachable: usize,
    },
    SlowReplication {
        follower: NodeId,
        lag_entries: u64,
    },
}

An event that the alerting subsystem can deliver to registered callbacks.

Variants

NodeFailed

A node has been presumed failed (heartbeat timeout or explicit mark).

Fields

node_id: NodeId

NodeRecovered

A previously-failed node is now reachable again.

Fields

node_id: NodeId

LeaderChanged

Raft leader changed (old may be None for the very first election).

Fields

old_leader: Option<NodeId>

new_leader: NodeId

QuorumLost

The cluster lost quorum — fewer than half of members are reachable.

Fields

cluster_size: usize

reachable: usize

SlowReplication

A follower is lagging far behind the leader’s commit index.

Fields

follower: NodeId

lag_entries: u64

Trait Implementations

impl Clone for AlertEvent

fn clone(&self) -> AlertEvent

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for AlertEvent

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.