7632 - add sync-min-peers to log and config overview

besu/src/main/java/org/hyperledger/besu/cli/BesuCommand.java

@@ -2701,7 +2701,8 @@ private String generateConfigurationOverview() {
 
     builder
         .setDataStorage(dataStorageOptions.normalizeDataStorageFormat())
-        .setSyncMode(syncMode.normalize());
+        .setSyncMode(syncMode.normalize())
+        .setSyncMinPeers(syncMinPeerCount);
 
     if (jsonRpcConfiguration != null && jsonRpcConfiguration.isEnabled()) {
       builder

besu/src/main/java/org/hyperledger/besu/cli/ConfigurationOverviewBuilder.java

@@ -46,6 +46,7 @@ public class ConfigurationOverviewBuilder {
   private String customGenesisFileName;
   private String dataStorage;
   private String syncMode;
+  private Integer syncMinPeers;
   private Integer rpcPort;
   private Collection<String> rpcHttpApis;
   private Integer enginePort;
@@ -149,6 +150,17 @@ public ConfigurationOverviewBuilder setSyncMode(final String syncMode) {
     return this;
   }
 
+  /**
+   * Sets sync min peers.
+   *
+   * @param syncMinPeers number of min peers for sync
+   * @return the builder
+   */
+  public ConfigurationOverviewBuilder setSyncMinPeers(final int syncMinPeers) {
+    this.syncMinPeers = syncMinPeers;
+    return this;
+  }
+
   /**
    * Sets rpc port.
    *
@@ -353,6 +365,10 @@ public String build() {
       lines.add("Sync mode: " + syncMode);
     }
 
+    if (syncMinPeers != null) {
+      lines.add("Sync min peers: " + syncMinPeers);
+    }
+
     if (rpcHttpApis != null) {
       lines.add("RPC HTTP APIs: " + String.join(",", rpcHttpApis));
     }

besu/src/test/java/org/hyperledger/besu/cli/ConfigurationOverviewBuilderTest.java

@@ -95,6 +95,16 @@ void setSyncMode() {
     assertThat(syncModeSet).contains("Sync mode: fast");
   }
 
+  @Test
+  void setSyncMinPeers() {
+    final String noSyncMinPeersSet = builder.build();
+    assertThat(noSyncMinPeersSet).doesNotContain("Sync min peers:");
+
+    builder.setSyncMinPeers(3);
+    final String syncMinPeersSet = builder.build();
+    assertThat(syncMinPeersSet).contains("Sync min peers: 3");
+  }
+
   @Test
   void setRpcPort() {
     final String noRpcPortSet = builder.build();

ethereum/eth/src/main/java/org/hyperledger/besu/ethereum/eth/sync/fastsync/SyncTargetManager.java

@@ -47,6 +47,7 @@ public class SyncTargetManager extends AbstractSyncTargetManager {
   private static final int LOG_INFO_REPEAT_DELAY = 120;
   private static final int SECONDS_PER_REQUEST = 6; // 5s per request + 1s wait between retries
 
+  private final SynchronizerConfiguration config;
   private final WorldStateStorageCoordinator worldStateStorageCoordinator;
   private final ProtocolSchedule protocolSchedule;
   private final ProtocolContext protocolContext;
@@ -65,6 +66,7 @@ public SyncTargetManager(
       final MetricsSystem metricsSystem,
       final FastSyncState fastSyncState) {
     super(config, protocolSchedule, protocolContext, ethContext, metricsSystem);
+    this.config = config;
     this.worldStateStorageCoordinator = worldStateStorageCoordinator;
     this.protocolSchedule = protocolSchedule;
     this.protocolContext = protocolContext;
@@ -82,15 +84,17 @@ protected CompletableFuture<Optional<EthPeer>> selectBestAvailableSyncTarget() {
       throttledLog(
           LOG::debug,
           String.format(
-              "Unable to find sync target. Currently checking %d peers for usefulness. Pivot block: %d",
-              ethContext.getEthPeers().peerCount(), pivotBlockHeader.getNumber()),
+              "Unable to find sync target. Waiting for %d peers minimum. Currently checking %d peers for usefulness. Pivot block: %d",
+              config.getSyncMinimumPeerCount(),
+              ethContext.getEthPeers().peerCount(),
+              pivotBlockHeader.getNumber()),
           logDebug,
           LOG_DEBUG_REPEAT_DELAY);
       throttledLog(
           LOG::info,
           String.format(
-              "Unable to find sync target. Currently checking %d peers for usefulness.",
-              ethContext.getEthPeers().peerCount()),
+              "Unable to find sync target. Waiting for %d peers minimum. Currently checking %d peers for usefulness.",
+              config.getSyncMinimumPeerCount(), ethContext.getEthPeers().peerCount()),
           logInfo,
           LOG_INFO_REPEAT_DELAY);
       return completedFuture(Optional.empty());

ethereum/eth/src/main/java/org/hyperledger/besu/ethereum/eth/sync/fullsync/FullSyncTargetManager.java

@@ -37,6 +37,7 @@
 class FullSyncTargetManager extends AbstractSyncTargetManager {
 
   private static final Logger LOG = LoggerFactory.getLogger(FullSyncTargetManager.class);
+  private final SynchronizerConfiguration config;
   private final ProtocolContext protocolContext;
   private final EthContext ethContext;
   private final SyncTerminationCondition terminationCondition;
@@ -49,6 +50,7 @@ class FullSyncTargetManager extends AbstractSyncTargetManager {
       final MetricsSystem metricsSystem,
       final SyncTerminationCondition terminationCondition) {
     super(config, protocolSchedule, protocolContext, ethContext, metricsSystem);
+    this.config = config;
     this.protocolContext = protocolContext;
     this.ethContext = ethContext;
     this.terminationCondition = terminationCondition;
@@ -77,7 +79,8 @@ protected CompletableFuture<Optional<EthPeer>> selectBestAvailableSyncTarget() {
     final Optional<EthPeer> maybeBestPeer = ethContext.getEthPeers().bestPeerWithHeightEstimate();
     if (!maybeBestPeer.isPresent()) {
       LOG.info(
-          "Unable to find sync target. Currently checking {} peers for usefulness",
+          "Unable to find sync target. Waiting for {} peers minimum. Currently checking {} peers for usefulness",
+          config.getSyncMinimumPeerCount(),
           ethContext.getEthPeers().peerCount());
       return completedFuture(Optional.empty());
     } else {