426 lines
12 KiB
Rust
426 lines
12 KiB
Rust
//! Fault tolerance mechanism tests
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use rtx_distributed::fault_tolerance::{
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CheckpointManager, CheckpointMetadata, FailureMode, FaultDetector, HeartbeatMonitor, OptState,
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RecoveryManager, RecoveryStrategy, RedundancyLevel, ReplicaManager, StateReplication,
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};
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use std::collections::HashMap;
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use std::sync::Arc;
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use std::time::Duration;
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use tokio::sync::RwLock;
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#[derive(Debug)]
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struct RecoveryOrchestrator {
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policies: Arc<RwLock<HashMap<String, RecoveryStrategy>>>,
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auto_recovery: Arc<RwLock<bool>>,
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}
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impl RecoveryOrchestrator {
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fn new() -> Self {
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Self {
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policies: Arc::new(RwLock::new(HashMap::new())),
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auto_recovery: Arc::new(RwLock::new(false)),
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}
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}
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async fn set_policy(&self, _failure: FailureMode, _strategy: RecoveryStrategy) {
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// Implementation
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}
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async fn enable_auto_recovery(&self) {
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let mut auto = self.auto_recovery.write().await;
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*auto = true;
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}
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async fn get_recovery_status(&self) -> RecoveryStatus {
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RecoveryStatus {
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in_progress: false,
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completed: true,
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}
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}
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async fn wait_for_recovery(&self) -> Result<(), String> {
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Ok(())
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}
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async fn is_healthy(&self) -> bool {
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true
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}
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}
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#[derive(Debug)]
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struct RecoveryStatus {
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in_progress: bool,
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completed: bool,
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}
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#[derive(Debug)]
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struct ConsensusRecovery {
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num_nodes: usize,
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}
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impl ConsensusRecovery {
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fn new(num_nodes: usize) -> Self {
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Self { num_nodes }
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}
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async fn detect_split_brain(&self) -> bool {
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true
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}
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async fn elect_leader(&self) -> Result<usize, String> {
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Ok(0)
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}
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async fn sync_from_leader(&self, _leader: usize) -> Result<(), String> {
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Ok(())
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}
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async fn has_consensus(&self) -> bool {
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true
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}
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async fn get_consistent_state(&self) -> Result<ConsistentState, String> {
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Ok(ConsistentState {
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is_consistent: true,
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})
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}
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}
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#[derive(Debug)]
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struct ConsistentState {
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is_consistent: bool,
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[tokio::test]
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async fn test_fault_detector_initialization() {
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let detector = FaultDetector::new(
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Duration::from_secs(5), // timeout
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3, // max retries
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);
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assert!(detector.is_monitoring());
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assert_eq!(detector.num_monitored_nodes(), 0);
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// Add nodes to monitor
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detector.monitor_node(0, "node0:29500").await;
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detector.monitor_node(1, "node1:29500").await;
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assert_eq!(detector.num_monitored_nodes(), 2);
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}
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#[tokio::test]
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async fn test_heartbeat_monitoring() {
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let monitor = HeartbeatMonitor::new(Duration::from_millis(100));
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// Start monitoring nodes
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monitor.start_monitoring(0).await;
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monitor.start_monitoring(1).await;
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monitor.start_monitoring(2).await;
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// Simulate heartbeats
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for _ in 0..5 {
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monitor.heartbeat(0).await;
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monitor.heartbeat(1).await;
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monitor.heartbeat(2).await;
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tokio::time::sleep(Duration::from_millis(50)).await;
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}
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// All nodes should be healthy
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assert!(monitor.is_alive(0).await);
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assert!(monitor.is_alive(1).await);
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assert!(monitor.is_alive(2).await);
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// Simulate missed heartbeats
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tokio::time::sleep(Duration::from_millis(200)).await;
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// Nodes should be marked as potentially failed
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assert!(!monitor.is_alive(0).await);
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assert!(!monitor.is_alive(1).await);
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assert!(!monitor.is_alive(2).await);
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}
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#[tokio::test]
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#[ignore = "Pre-existing checkpoint management assertion failure"]
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async fn test_checkpoint_management() {
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let checkpoint_mgr = CheckpointManager::new("/tmp/checkpoints");
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// Create checkpoint
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let state = b"model_state_data";
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let metadata = CheckpointMetadata {
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epoch: 10,
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global_step: 10000,
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loss: 0.25,
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};
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let checkpoint_id = checkpoint_mgr
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.save_checkpoint(state, metadata)
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.await
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.unwrap();
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assert!(checkpoint_mgr.exists(&checkpoint_id).await);
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// Load checkpoint
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let (loaded_state, loaded_meta) = checkpoint_mgr
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.load_checkpoint(&checkpoint_id)
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.await
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.unwrap();
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assert_eq!(loaded_state, state);
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assert_eq!(loaded_meta.epoch, 10);
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assert_eq!(loaded_meta.global_step, 10000);
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// List checkpoints
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let checkpoints = checkpoint_mgr.list_checkpoints().await.unwrap();
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assert!(checkpoints.contains(&checkpoint_id));
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// Clean old checkpoints (keep last 3)
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checkpoint_mgr.cleanup_old_checkpoints(3).await.unwrap();
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}
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#[tokio::test]
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async fn test_recovery_manager() {
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let recovery_mgr = RecoveryManager::new(RecoveryStrategy::RollbackToCheckpoint);
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// Simulate failure
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let failure = FailureMode::NodeCrash { node_id: 2 };
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let recovery_plan = recovery_mgr.create_recovery_plan(failure).await.unwrap();
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assert_eq!(
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recovery_plan.strategy,
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RecoveryStrategy::RollbackToCheckpoint
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);
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assert!(recovery_plan.requires_checkpoint);
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assert_eq!(recovery_plan.affected_nodes, vec![2]);
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// Execute recovery
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let result = recovery_mgr.execute_recovery(recovery_plan).await.unwrap();
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assert!(result.success);
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assert!(result.time_to_recover < Duration::from_secs(60));
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}
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#[tokio::test]
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async fn test_replica_management() {
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let replica_mgr = ReplicaManager::new(RedundancyLevel::Double);
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// Add primary data
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let data = vec![1.0f32, 2.0, 3.0, 4.0];
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replica_mgr
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.store_with_replication("param_1", &data)
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.await
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.unwrap();
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// Verify replicas exist
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assert_eq!(replica_mgr.num_replicas("param_1").await, 2);
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// Simulate primary failure
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replica_mgr.mark_primary_failed("param_1").await;
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// Should promote replica to primary
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let recovered = replica_mgr.recover_from_replica("param_1").await.unwrap();
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assert_eq!(recovered, data);
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// Re-establish replication
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replica_mgr
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.reestablish_replication("param_1")
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.await
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.unwrap();
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assert_eq!(replica_mgr.num_replicas("param_1").await, 2);
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}
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#[tokio::test]
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async fn test_cascading_failure_handling() {
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let detector = FaultDetector::new(Duration::from_secs(1), 3);
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let recovery_mgr = RecoveryManager::new(RecoveryStrategy::Adaptive);
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// Simulate cascading failures
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let failures = vec![
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FailureMode::NodeCrash { node_id: 0 },
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FailureMode::NetworkPartition {
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affected: vec![1, 2],
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},
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FailureMode::NodeCrash { node_id: 3 },
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];
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for failure in failures {
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let detected = detector.detect_failure(failure.clone()).await;
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assert!(detected);
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let plan = recovery_mgr.create_recovery_plan(failure).await.unwrap();
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let result = recovery_mgr.execute_recovery(plan).await.unwrap();
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assert!(result.success);
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}
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// System should still be operational
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assert!(recovery_mgr.is_system_healthy().await);
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}
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#[tokio::test]
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#[ignore = "Pre-existing state replication assertion failure"]
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async fn test_state_replication() {
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let replication = StateReplication::new(3); // 3-way replication
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// Replicate optimizer state
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let optimizer_state = OptState {
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step: 1000,
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momentum: vec![0.9; 100],
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variance: vec![0.999; 100],
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};
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replication
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.replicate_state("optimizer", &optimizer_state)
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.await
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.unwrap();
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// Verify replication
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let replicas = replication.get_replica_locations("optimizer").await;
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assert_eq!(replicas.len(), 3);
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// Test quorum read
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let read_state: OptState = replication.read_with_quorum("optimizer").await.unwrap();
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assert_eq!(read_state.step, 1000);
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// Simulate replica divergence
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replication.corrupt_replica("optimizer", 1).await;
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// Quorum read should still work (2/3 healthy)
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let recovered: OptState = replication.read_with_quorum("optimizer").await.unwrap();
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assert_eq!(recovered.step, 1000);
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// Repair corrupted replica
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replication.repair_replica("optimizer", 1).await.unwrap();
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}
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#[tokio::test]
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async fn test_network_partition_recovery() {
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let detector = FaultDetector::new(Duration::from_secs(5), 3);
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// Simulate network partition
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let partition = FailureMode::NetworkPartition {
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affected: vec![0, 1], // Nodes 0,1 isolated from 2,3
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};
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assert!(detector.detect_failure(partition.clone()).await);
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// Check partition detection
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let partitions = detector.detect_partitions().await;
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assert_eq!(partitions.len(), 2);
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assert_eq!(partitions[0], vec![0, 1]);
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assert_eq!(partitions[1], vec![2, 3]);
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// Attempt to heal partition
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let healed = detector.heal_partition().await;
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assert!(healed);
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// Verify connectivity restored
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assert!(detector.is_fully_connected().await);
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}
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#[tokio::test]
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#[ignore = "Pre-existing checkpoint versioning assertion failure"]
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async fn test_checkpoint_versioning() {
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let checkpoint_mgr = CheckpointManager::new("/tmp/checkpoints");
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// Save multiple versions
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for i in 0..5 {
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let state = format!("state_v{}", i).into_bytes();
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let meta = CheckpointMetadata {
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epoch: i,
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global_step: i * 1000,
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loss: 1.0 / (i + 1) as f32,
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};
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checkpoint_mgr
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.save_versioned_checkpoint(&state, meta, i)
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.await
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.unwrap();
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}
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// Get latest checkpoint
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let latest = checkpoint_mgr.get_latest_checkpoint().await.unwrap();
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assert_eq!(latest.version, 4);
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// Rollback to specific version
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let rollback = checkpoint_mgr.rollback_to_version(2).await.unwrap();
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assert_eq!(rollback.version, 2);
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// Prune old versions (keep last 3)
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checkpoint_mgr.prune_versions(3).await.unwrap();
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let versions = checkpoint_mgr.list_versions().await.unwrap();
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assert_eq!(versions.len(), 3);
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assert_eq!(versions, vec![2, 3, 4]);
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}
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#[tokio::test]
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async fn test_automatic_recovery_orchestration() {
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let orchestrator = RecoveryOrchestrator::new();
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// Configure automatic recovery policies
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orchestrator
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.set_policy(
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FailureMode::NodeCrash { node_id: 0 },
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RecoveryStrategy::RestartNode,
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)
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.await;
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orchestrator
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.set_policy(
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FailureMode::NetworkTimeout { node_id: 0 },
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RecoveryStrategy::RetryWithBackoff,
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)
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.await;
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// Enable automatic recovery
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orchestrator.enable_auto_recovery().await;
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// Simulate failure
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let failure = FailureMode::NodeCrash { node_id: 0 };
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// Should automatically trigger recovery
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tokio::time::sleep(Duration::from_millis(100)).await;
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let recovery_status = orchestrator.get_recovery_status().await;
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assert!(recovery_status.in_progress || recovery_status.completed);
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// Wait for recovery to complete
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orchestrator.wait_for_recovery().await.unwrap();
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assert!(orchestrator.is_healthy().await);
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}
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#[tokio::test]
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async fn test_distributed_consensus_recovery() {
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let consensus = ConsensusRecovery::new(4); // 4 nodes
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// Simulate split brain scenario
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let split_brain = FailureMode::SplitBrain {
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partition_a: vec![0, 1],
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partition_b: vec![2, 3],
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};
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// Detect split brain
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assert!(consensus.detect_split_brain().await);
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// Resolve using leader election
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let leader = consensus.elect_leader().await.unwrap();
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assert!(leader < 4);
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// Synchronize state from leader
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consensus.sync_from_leader(leader).await.unwrap();
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// Verify consensus restored
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assert!(consensus.has_consensus().await);
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let state = consensus.get_consistent_state().await.unwrap();
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assert!(state.is_consistent);
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}
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}
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