chore: Harden drone sample

akka-edge-docs/src/main/paradox/guide/1-local-drone-control-service.md

@@ -100,10 +100,10 @@ It is of course also possible to instead use a separate standalone database such
 Config to use H2 looks like this:
 
 Scala
-:  @@snip [persistence.conf](/samples/grpc/local-drone-control-scala/src/main/resources/persistence.conf) { }
+:  @@snip [persistence-h2.conf](/samples/grpc/local-drone-control-scala/src/main/resources/persistence-h2.conf) { }
 
 Java
-:  @@snip [persistence.conf](/samples/grpc/local-drone-control-java/src/main/resources/persistence.conf) { }
+:  @@snip [persistence-h2.conf](/samples/grpc/local-drone-control-java/src/main/resources/persistence-h2.conf) { }
 
 In addition to the configuration, the following additional dependencies are needed in the project build:
 

akka-edge-docs/src/main/paradox/guide/2-drone-location-to-cloud-service.md

@@ -315,4 +315,4 @@ grpcurl -d '{"drone_id":"drone1"}' -plaintext localhost:8101 central.drones.Dron
 
 ## What's next?
 
-* Accept restaurant delivery orders in the restaurant-drone-deliveries-service 
+* Accept restaurant delivery orders in the restaurant-drone-deliveries-service 

samples/grpc/local-drone-control-java/src/main/java/local/drones/ClusteredMain.java

@@ -13,6 +13,9 @@
  * Main for starting the local-drone-control as a cluster rather than a single self-contained node.
  * Requires a separate database, start with config from local{1,2,3}.conf files for running as
  * cluster locally.
+ *
+ * <p>This should be started with -Dconfig.resource=application-cluster.conf or
+ * `-Dconfig.resource=local1.conf`
  */
 public class ClusteredMain {
 

samples/grpc/local-drone-control-java/src/main/java/local/drones/DeliveriesQueue.java

@@ -5,6 +5,7 @@
 import akka.Done;
 import akka.actor.typed.ActorRef;
 import akka.actor.typed.Behavior;
+import akka.actor.typed.SupervisorStrategy;
 import akka.actor.typed.javadsl.ActorContext;
 import akka.actor.typed.javadsl.Behaviors;
 import akka.cluster.sharding.typed.javadsl.EntityTypeKey;
@@ -15,6 +16,7 @@
 import akka.persistence.typed.state.javadsl.Effect;
 import akka.serialization.jackson.CborSerializable;
 import com.fasterxml.jackson.annotation.JsonCreator;
+import java.time.Duration;
 import java.time.Instant;
 import java.util.*;
 
@@ -151,15 +153,20 @@ public DeliveryInProgress(String deliveryId, String droneId, Instant pickupTime)
       EntityTypeKey.create(Command.class, "RestaurantDeliveries");
 
   public static Behavior<Command> create() {
-    return Behaviors.setup(
-        context ->
-            new DeliveriesQueue(context, PersistenceId.of(EntityKey.name(), "DeliveriesQueue")));
+    return Behaviors.<Command>supervise(
+            Behaviors.setup(
+                context ->
+                    new DeliveriesQueue(
+                        context, PersistenceId.of(EntityKey.name(), "DeliveriesQueue"))))
+        .onFailure(SupervisorStrategy.restart());
   }
 
   private final ActorContext<Command> context;
 
   public DeliveriesQueue(ActorContext<Command> context, PersistenceId persistenceId) {
-    super(persistenceId);
+    super(
+        persistenceId,
+        SupervisorStrategy.restartWithBackoff(Duration.ofMillis(100), Duration.ofSeconds(5), 0.1));
     this.context = context;
   }
 

samples/grpc/local-drone-control-java/src/main/java/local/drones/Drone.java

@@ -6,6 +6,7 @@
 import akka.actor.typed.ActorRef;
 import akka.actor.typed.ActorSystem;
 import akka.actor.typed.Behavior;
+import akka.actor.typed.SupervisorStrategy;
 import akka.cluster.sharding.typed.javadsl.ClusterSharding;
 import akka.cluster.sharding.typed.javadsl.Entity;
 import akka.cluster.sharding.typed.javadsl.EntityTypeKey;
@@ -17,6 +18,7 @@
 import akka.persistence.typed.javadsl.EventSourcedBehavior;
 import akka.serialization.jackson.CborSerializable;
 import com.fasterxml.jackson.annotation.JsonCreator;
+import java.time.Duration;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
@@ -116,7 +118,9 @@ public static Behavior<Command> create(String entityId) {
   }
 
   private Drone(String entityId) {
-    super(PersistenceId.of(ENTITY_KEY.name(), entityId));
+    super(
+        PersistenceId.of(ENTITY_KEY.name(), entityId),
+        SupervisorStrategy.restartWithBackoff(Duration.ofMillis(100), Duration.ofSeconds(5), 0.1));
   }
 
   @Override

samples/grpc/local-drone-control-java/src/main/resources/application-kubernetes.conf → samples/grpc/local-drone-control-java/src/main/resources/application-cluster.conf

@@ -1,14 +1,10 @@
 # Production configuration for running the local-drone-control service in Kubernetes,
 # as a multi-node cluster and with a separate PostgreSQL database.
-
 include "cluster"
 include "grpc"
-include "postgres"
+include "persistence-postgres"
 
 local-drone-control {
-  # consider setting this to a specific interface for your environment
-  grpc.interface = "0.0.0.0"
-  grpc.interface = ${?GRPC_INTERFACE}
 
   nr-of-event-producers = 4
   # unique identifier for the instance of local control, must be known up front by the cloud service
@@ -18,9 +14,6 @@ local-drone-control {
   ask-timeout = 3s
 }
 
-akka.management.cluster.bootstrap.contact-point-discovery {
-  service-name = "local-drone-control"
-  discovery-method = kubernetes-api
-  required-contact-point-nr = 1
-  required-contact-point-nr = ${?REQUIRED_CONTACT_POINT_NR}
+akka {
+  loglevel = DEBUG
 }

samples/grpc/local-drone-control-java/src/main/resources/application.conf

@@ -1,14 +1,9 @@
-include "h2-default-projection-schema.conf"
-include "grpc"
-include "persistence"
-
 # Default config, used for running a single-node cluster that cannot scale out to many nodes, using H2 for
 # persistence, started through local.drones.Main
 
-akka {
-  actor.provider = cluster
-  loglevel = DEBUG
-}
+include "h2-default-projection-schema.conf"
+include "grpc"
+include "persistence-h2"
 
 local-drone-control {
   # unique identifier for the instance of local control, must be known up front by the cloud service
@@ -17,3 +12,22 @@ local-drone-control {
 
   ask-timeout = 3s
 }
+
+akka {
+  loglevel = DEBUG
+  actor.provider = cluster
+}
+
+akka.remote.artery {
+  # single node cluster
+  canonical.hostname = "127.0.0.1"
+  canonical.port = 0
+  canonical.port = ${?REMOTE_PORT}
+}
+
+akka.cluster.sharding {
+  passivation {
+    strategy = default-strategy
+    active-entity-limit = 1000
+  }
+}

samples/grpc/local-drone-control-java/src/main/resources/cluster.conf

@@ -1,24 +1,34 @@
 akka {
   actor.provider = cluster
+}
 
-  remote.artery {
-    canonical.port = 2552
-    canonical.port = ${?REMOTE_PORT}
-  }
+akka.remote.artery {
+  canonical.port = 2552
+  canonical.port = ${?REMOTE_PORT}
+}
 
-  cluster {
-    downing-provider-class = "akka.cluster.sbr.SplitBrainResolverProvider"
+akka.cluster {
+  downing-provider-class = "akka.cluster.sbr.SplitBrainResolverProvider"
 
-    shutdown-after-unsuccessful-join-seed-nodes = 120s
+  shutdown-after-unsuccessful-join-seed-nodes = 120s
 
-    sharding {
-      least-shard-allocation-strategy.rebalance-absolute-limit = 20
-      passivation.strategy = default-strategy
+  sharding {
+    least-shard-allocation-strategy.rebalance-absolute-limit = 20
+    passivation {
+      strategy = default-strategy
+      active-entity-limit = 1000
     }
   }
+}
+
+akka.management {
+  http.port = 8558
+  http.port = ${?HTTP_MGMT_PORT}
 
-  management {
-    http.port = 8558
-    http.port = ${?HTTP_MGMT_PORT}
+  cluster.bootstrap.contact-point-discovery {
+    service-name = "local-drone-control"
+    discovery-method = kubernetes-api
+    required-contact-point-nr = 1
+    required-contact-point-nr = ${?REQUIRED_CONTACT_POINT_NR}
   }
 }

samples/grpc/local-drone-control-java/src/main/resources/local-shared.conf

@@ -2,7 +2,7 @@
 # through the local.drones.ClusteredMain and a separate PostgreSQL database
 include "cluster"
 include "grpc"
-include "postgres"
+include "persistence-postgres"
 
 local-drone-control.grpc.interface = "127.0.0.1"
 akka.remote.artery.canonical.hostname = "127.0.0.1"

samples/grpc/local-drone-control-scala/src/main/resources/application-kubernetes.conf → samples/grpc/local-drone-control-scala/src/main/resources/application-cluster.conf

@@ -1,14 +1,10 @@
 # Production configuration for running the local-drone-control service in Kubernetes,
 # as a multi-node cluster and with a separate PostgreSQL database.
-
 include "cluster"
 include "grpc"
-include "postgres"
+include "persistence-postgres"
 
 local-drone-control {
-  # consider setting this to a specific interface for your environment
-  grpc.interface = "0.0.0.0"
-  grpc.interface = ${?GRPC_INTERFACE}
 
   nr-of-event-producers = 4
   # unique identifier for the instance of local control, must be known up front by the cloud service
@@ -18,9 +14,6 @@ local-drone-control {
   ask-timeout = 3s
 }
 
-akka.management.cluster.bootstrap.contact-point-discovery {
-  service-name = "local-drone-control"
-  discovery-method = kubernetes-api
-  required-contact-point-nr = 1
-  required-contact-point-nr = ${?REQUIRED_CONTACT_POINT_NR}
+akka {
+  loglevel = DEBUG
 }

samples/grpc/local-drone-control-scala/src/main/resources/application.conf

@@ -1,14 +1,9 @@
-include "h2-default-projection-schema.conf"
-include "grpc"
-include "persistence"
-
 # Default config, used for running a single-node cluster that cannot scale out to many nodes, using H2 for
 # persistence, started through local.drones.Main
 
-akka {
-  actor.provider = cluster
-  loglevel = DEBUG
-}
+include "h2-default-projection-schema.conf"
+include "grpc"
+include "persistence-h2"
 
 local-drone-control {
   # unique identifier for the instance of local control, must be known up front by the cloud service
@@ -17,3 +12,22 @@ local-drone-control {
 
   ask-timeout = 3s
 }
+
+akka {
+  loglevel = DEBUG
+  actor.provider = cluster
+}
+
+akka.remote.artery {
+  # single node cluster
+  canonical.hostname = "127.0.0.1"
+  canonical.port = 0
+  canonical.port = ${?REMOTE_PORT}
+}
+
+akka.cluster.sharding {
+  passivation {
+    strategy = default-strategy
+    active-entity-limit = 1000
+  }
+}

samples/grpc/local-drone-control-scala/src/main/resources/cluster.conf

@@ -1,24 +1,34 @@
 akka {
   actor.provider = cluster
+}
 
-  remote.artery {
-    canonical.port = 2552
-    canonical.port = ${?REMOTE_PORT}
-  }
+akka.remote.artery {
+  canonical.port = 2552
+  canonical.port = ${?REMOTE_PORT}
+}
 
-  cluster {
-    downing-provider-class = "akka.cluster.sbr.SplitBrainResolverProvider"
+akka.cluster {
+  downing-provider-class = "akka.cluster.sbr.SplitBrainResolverProvider"
 
-    shutdown-after-unsuccessful-join-seed-nodes = 120s
+  shutdown-after-unsuccessful-join-seed-nodes = 120s
 
-    sharding {
-      least-shard-allocation-strategy.rebalance-absolute-limit = 20
-      passivation.strategy = default-strategy
+  sharding {
+    least-shard-allocation-strategy.rebalance-absolute-limit = 20
+    passivation {
+      strategy = default-strategy
+      active-entity-limit = 1000
     }
   }
+}
+
+akka.management {
+  http.port = 8558
+  http.port = ${?HTTP_MGMT_PORT}
 
-  management {
-    http.port = 8558
-    http.port = ${?HTTP_MGMT_PORT}
+  cluster.bootstrap.contact-point-discovery {
+    service-name = "local-drone-control"
+    discovery-method = kubernetes-api
+    required-contact-point-nr = 1
+    required-contact-point-nr = ${?REQUIRED_CONTACT_POINT_NR}
   }
 }

samples/grpc/local-drone-control-scala/src/main/resources/local-shared.conf

@@ -2,7 +2,7 @@
 # through the local.drones.ClusteredMain and a separate PostgreSQL database
 include "cluster"
 include "grpc"
-include "postgres"
+include "persistence-postgres"
 
 local-drone-control.grpc.interface = "127.0.0.1"
 akka.remote.artery.canonical.hostname = "127.0.0.1"

samples/grpc/local-drone-control-java/src/main/resources/local-persistence.conf → samples/grpc/local-drone-control-scala/src/main/resources/persistence-postgres.conf

@@ -20,12 +20,14 @@ akka {
         host = ${?DB_HOST}
         # note: different port for running in parallel with db for restaurant-drone-deliveries-service
         port = 5433
+        port = ${?DB_PORT}
         database = "postgres"
+        database = ${?DB_DATABASE}
         user = "postgres"
         user = ${?DB_USER}
         password = "postgres"
         password = ${?DB_PASSWORD}
       }
     }
   }
-}
+}

samples/grpc/local-drone-control-scala/src/main/scala/local/drones/ClusteredMain.scala

@@ -9,6 +9,8 @@ import akka.management.scaladsl.AkkaManagement
 /**
  * Main for starting the local-drone-control as a cluster rather than a single self-contained node. Requires
  * a separate database, start with config from local{1,2,3}.conf files for running as cluster locally.
+ *
+ * This should be started with -Dconfig.resource=application-cluster.conf or `-Dconfig.resource=local1.conf`
  */
 object ClusteredMain {