Übung überarbeitet: Gegenüberstellung von Key-Hashing und Fixed

diff --git a/README.sh b/README.sh
index 513a7d5..f227f47 100755 (executable)
--- a/README.sh
+++ b/README.sh
@@ -30,41 +30,94 @@ docker-compose -f docker/docker-compose.yml up -t0 -d cli
 sleep 1
 docker-compose -f docker/docker-compose.yml logs setup
 
-docker-compose -f docker/docker-compose.yml up -d producer-0 producer-1
-while ! [[ $(http 0:8000/actuator/health 2> /dev/null) =~ "UP" ]]; do echo "Waiting for producer-0..."; sleep 1; done
-while ! [[ $(http 0:8001/actuator/health 2> /dev/null) =~ "UP" ]]; do echo "Waiting for producer-1..."; sleep 1; done
-docker-compose -f docker/docker-compose.yml up -d consumer
+docker-compose -f docker/docker-compose.yml up -d producer
+while ! [[ $(http 0:8080/actuator/health 2> /dev/null) =~ "UP" ]]; do echo "Waiting for producer..."; sleep 1; done
 
-# tag::http[]
-echo -n Nachricht 1 an Producer 0 | http -v :8000/foo
-echo -n Nachricht 1 an Producer 1 | http -v :8001/foo
-# end::http[]
-echo -n Nachricht 2 an Producer 0 | http -v :8000/bar
-echo -n Nachricht 2 an Producer 1 | http -v :8001/bar
+# tag::hashed[]
+echo -n Nachricht 1 an klaus über producer | http -v :8080/klaus
+# end::hashed[]
+echo -n Nachricht 2 an klaus über producer | http -v :8080/klaus
+# tag::hashed[]
+echo -n Nachricht 1 an peter über producer | http -v :8080/peter
+# end::hashed[]
+echo -n Nachricht 3 an klaus über producer | http -v :8080/klaus
+echo -n Nachricht 2 an peter über producer | http -v :8080/peter
+echo -n Nachricht 3 an peter über producer | http -v :8080/peter
 
-docker-compose -f docker/docker-compose.yml logs consumer
+echo Nachrichten in Partition 0:
+kafkacat -b :9092 -t test -o 0 -p0 -f'key: %k\toffset: %o\tvalue: %s\n' -qe
+echo
+echo Nachrichten in Partition 1:
+kafkacat -b :9092 -t test -o 0 -p1 -f'key: %k\toffset: %o\tvalue: %s\n' -qe
+echo
 
 docker-compose -f docker/docker-compose.yml exec -T cli bash << 'EOF'
-echo "Altering number of partitions from 3 to 7..."
+echo "Altering number of partitions from 2 to 3..."
 kafka-topics --bootstrap-server kafka:9092 --describe --topic test
 # tag::repartitioning[]
-kafka-topics --bootstrap-server kafka:9092 --alter --topic test --partitions 7
+kafka-topics --bootstrap-server kafka:9092 --alter --topic test --partitions 3
 # end::repartitioning[]
 kafka-topics --bootstrap-server kafka:9092 --describe --topic test
 EOF
 
-docker-compose -f docker/docker-compose.yml restart producer-0 producer-1
+docker-compose -f docker/docker-compose.yml restart producer
+while ! [[ $(http 0:8080/actuator/health 2> /dev/null) =~ "UP" ]]; do echo "Waiting for producer..."; sleep 1; done
+
+echo -n Nachricht 4 an klaus über producer | http -v :8080/klaus
+echo -n Nachricht 5 an peter über producer | http -v :8080/peter
+echo -n Nachricht 4 an peter über producer | http -v :8080/peter
+echo -n Nachricht 5 an klaus über producer | http -v :8080/klaus
+echo -n Nachricht 6 an klaus über producer | http -v :8080/klaus
+echo -n Nachricht 6 an peter über producer | http -v :8080/peter
+
+echo Nachrichten in Partition 0:
+# tag::kafkacat[]
+kafkacat -b :9092 -t test -o 0 -p0 -f'key: %k\toffset: %o\tvalue: %s\n' -qe
+# end::kafkacat[]
+echo
+echo Nachrichten in Partition 1:
+# tag::kafkacat[]
+kafkacat -b :9092 -t test -o 0 -p1 -f'key: %k\toffset: %o\tvalue: %s\n' -qe
+# end::kafkacat[]
+echo
+echo Nachrichten in Partition 2:
+kafkacat -b :9092 -t test -o 0 -p2 -f'key: %k\toffset: %o\tvalue: %s\n' -qe
+
+
+docker-compose -f docker/docker-compose.yml restart setup
+sleep 1
+docker-compose -f docker/docker-compose.yml up -d producer-0 producer-1
 while ! [[ $(http 0:8000/actuator/health 2> /dev/null) =~ "UP" ]]; do echo "Waiting for producer-0..."; sleep 1; done
 while ! [[ $(http 0:8001/actuator/health 2> /dev/null) =~ "UP" ]]; do echo "Waiting for producer-1..."; sleep 1; done
 
-echo -n Nachricht 3 an Producer 0 | http -v :8000/foo
-echo -n Nachricht 3 an Producer 1 | http -v :8001/foo
-echo -n Nachricht 4 an Producer 0 | http -v :8000/bar
-echo -n Nachricht 4 an Producer 1 | http -v :8001/bar
+# tag::fixed[]
+echo -n Nachricht 1 über producer-0 | http -v :8000/klaus
+echo -n Nachricht 1 über producer-1 | http -v :8001/klaus
+echo -n Nachricht 2 über producer-0 | http -v :8000/peter
+echo -n Nachricht 2 über producer-1 | http -v :8001/peter
+# end::fixed[]
 
-docker-compose -f docker/docker-compose.yml logs consumer
+docker-compose -f docker/docker-compose.yml exec -T cli bash << 'EOF'
+echo "Altering number of partitions from 2 to 3..."
+kafka-topics --bootstrap-server kafka:9092 --describe --topic test
+kafka-topics --bootstrap-server kafka:9092 --alter --topic test --partitions 3
+kafka-topics --bootstrap-server kafka:9092 --describe --topic test
+EOF
 
-# tag::kafkacat[]
-kafkacat -b :9092 -t test -o 0 -p0 -f'p=%p|o=%o|k=%k|v=%s\n' -qe
-kafkacat -b :9092 -t test -o 0 -p1 -f'p=%p|o=%o|k=%k|v=%s\n' -qe
-# end::kafkacat[]
+docker-compose -f docker/docker-compose.yml restart producer-0 producer-1
+while ! [[ $(http 0:8000/actuator/health 2> /dev/null) =~ "UP" ]]; do echo "Waiting for producer-0..."; sleep 1; done
+while ! [[ $(http 0:8001/actuator/health 2> /dev/null) =~ "UP" ]]; do echo "Waiting for producer-1..."; sleep 1; done
+
+echo -n Nachricht 3 über producer-0 | http -v :8000/klaus
+echo -n Nachricht 3 über producer-1 | http -v :8001/klaus
+echo -n Nachricht 4 über producer-0 | http -v :8000/peter
+echo -n Nachricht 4 über producer-1 | http -v :8001/peter
+
+echo Nachrichten in Partition 0:
+kafkacat -b :9092 -t test -o 0 -p0 -f'key: %k\toffset: %o\tvalue: %s\n' -qe
+echo
+echo Nachrichten in Partition 1:
+kafkacat -b :9092 -t test -o 0 -p1 -f'key: %k\toffset: %o\tvalue: %s\n' -qe
+echo
+echo Nachrichten in Partition 2:
+kafkacat -b :9092 -t test -o 0 -p2 -f'key: %k\toffset: %o\tvalue: %s\n' -qe

diff --git a/docker/docker-compose.yml b/docker/docker-compose.yml
index 0569a91..12ba802 100644 (file)
--- a/docker/docker-compose.yml
+++ b/docker/docker-compose.yml
@@ -131,6 +131,14 @@ services:
       producer.topic: test
       producer.partition: 1
 
-  consumer:
+  consumer-1:
     image: juplo/simple-consumer:1.0-SNAPSHOT
-    command: kafka:9092 test my-group consumer
+    command: kafka:9092 test my-group consumer-1
+
+  consumer-2:
+    image: juplo/simple-consumer:1.0-SNAPSHOT
+    command: kafka:9092 test my-group consumer-2
+
+  consumer-3:
+    image: juplo/simple-consumer:1.0-SNAPSHOT
+    command: kafka:9092 test my-group consumer-3