我正在尝试创建一个部署在kubernetes上的kafka集群。我有以下配置：
Kafka服务：
apiVersion: v1
kind: Service
metadata:
name: kafka
labels:
app: kafka
namespace: kafka
spec:
ports:
- name: kafka-port
port: 9093
protocol: TCP
selector:
app: kafka
type: NodePort
Kafka StatefullSet：
apiVersion: apps/v1
kind: StatefulSet
metadata:
name: kafka
namespace: kafka
labels:
app: kafka
spec:
replicas: 1
serviceName: kafka
podManagementPolicy: Parallel
updateStrategy:
type: RollingUpdate
selector:
matchLabels:
app: kafka
template:
metadata:
labels:
app: kafka
spec:
containers:
- name: kafka
imagePullPolicy: Always
image: wurstmeister/kafka
ports:
- containerPort: 9093
command:
- sh
- -c
- "exec kafka-server-start.sh /opt/kafka/config/server.properties --override broker.id=${HOSTNAME##*-} \
--override listeners=PLAINTEXT://:9093 \
--override zookeeper.connect=zookeeper:2181 \
--override log.dir=/var/lib/kafka \
--override auto.create.topics.enable=true \
--override auto.leader.rebalance.enable=true \
--override background.threads=10 \
--override compression.type=producer \
--override delete.topic.enable=false \
--override leader.imbalance.check.interval.seconds=300 \
--override leader.imbalance.per.broker.percentage=10 \
--override log.flush.interval.messages=9223372036854775807 \
--override log.flush.offset.checkpoint.interval.ms=60000 \
--override log.flush.scheduler.interval.ms=9223372036854775807 \
--override log.retention.bytes=-1 \
--override log.retention.hours=168 \
--override log.roll.hours=168 \
--override log.roll.jitter.hours=0 \
--override log.segment.bytes=1073741824 \
--override log.segment.delete.delay.ms=60000 \
--override message.max.bytes=1000012 \
--override min.insync.replicas=1 \
--override num.io.threads=8 \
--override num.network.threads=3 \
--override num.recovery.threads.per.data.dir=1 \
--override num.replica.fetchers=1 \
--override offset.metadata.max.bytes=4096 \
--override offsets.commit.required.acks=-1 \
--override offsets.commit.timeout.ms=5000 \
--override offsets.load.buffer.size=5242880 \
--override offsets.retention.check.interval.ms=600000 \
--override offsets.retention.minutes=1440 \
--override offsets.topic.compression.codec=0 \
--override offsets.topic.num.partitions=50 \
--override offsets.topic.replication.factor=1 \
--override offsets.topic.segment.bytes=104857600 \
--override queued.max.requests=500 \
--override quota.consumer.default=9223372036854775807 \
--override quota.producer.default=9223372036854775807 \
--override replica.fetch.min.bytes=1 \
--override replica.fetch.wait.max.ms=500 \
--override replica.high.watermark.checkpoint.interval.ms=5000 \
--override replica.lag.time.max.ms=10000 \
--override replica.socket.receive.buffer.bytes=65536 \
--override replica.socket.timeout.ms=30000 \
--override request.timeout.ms=30000 \
--override socket.receive.buffer.bytes=102400 \
--override socket.request.max.bytes=104857600 \
--override socket.send.buffer.bytes=102400 \
--override unclean.leader.election.enable=true \
--override zookeeper.session.timeout.ms=6000 \
--override zookeeper.set.acl=false \
--override broker.id.generation.enable=true \
--override connections.max.idle.ms=600000 \
--override controlled.shutdown.enable=true \
--override controlled.shutdown.max.retries=3 \
--override controlled.shutdown.retry.backoff.ms=5000 \
--override controller.socket.timeout.ms=30000 \
--override default.replication.factor=1 \
--override fetch.purgatory.purge.interval.requests=1000 \
--override group.max.session.timeout.ms=300000 \
--override group.min.session.timeout.ms=6000 \
--override inter.broker.protocol.version=0.11.0 \
--override log.cleaner.backoff.ms=15000 \
--override log.cleaner.dedupe.buffer.size=134217728 \
--override log.cleaner.delete.retention.ms=86400000 \
--override log.cleaner.enable=true \
--override log.cleaner.io.buffer.load.factor=0.9 \
--override log.cleaner.io.buffer.size=524288 \
--override log.cleaner.io.max.bytes.per.second=1.7976931348623157E308 \
--override log.cleaner.min.cleanable.ratio=0.5 \
--override log.cleaner.min.compaction.lag.ms=0 \
--override log.cleaner.threads=1 \
--override log.cleanup.policy=delete \
--override log.index.interval.bytes=4096 \
--override log.index.size.max.bytes=10485760 \
--override log.message.timestamp.difference.max.ms=9223372036854775807 \
--override log.message.timestamp.type=CreateTime \
--override log.preallocate=false \
--override log.retention.check.interval.ms=300000 \
--override max.connections.per.ip=2147483647 \
--override num.partitions=1 \
--override producer.purgatory.purge.interval.requests=1000 \
--override replica.fetch.backoff.ms=1000 \
--override replica.fetch.max.bytes=1048576 \
--override replica.fetch.response.max.bytes=10485760 \
--override reserved.broker.max.id=1000 "
volumeMounts:
- name: datadir
mountPath: /var/lib/kafka
readinessProbe:
exec:
command:
- sh
- -c
- "/opt/kafka/bin/kafka-broker-api-versions.sh --bootstrap-server=localhost:9093"
volumeClaimTemplates:
- metadata:
name: datadir
spec:
accessModes: [ "ReadWriteOnce" ]
resources:
requests:
storage: 10Gi
Zookeeper服务
apiVersion: v1
kind: Service
metadata:
name: zookeeper
namespace: kafka
labels:
name: zookeeper
spec:
ports:
- name: client
port: 2181
protocol: TCP
- name: follower
port: 2888
protocol: TCP
- name: leader
port: 3888
protocol: TCP
selector:
name: zookeeper
Zookeeper部署：
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: zookeeper
namespace: kafka
spec:
replicas: 1
template:
metadata:
labels:
name: zookeeper
spec:
containers:
- env:
- name: ZOOKEEPER_ID
value: "1"
- name: ZOOKEEPER_SERVER_1
value: zookeeper
name: zookeeper
image: digitalwonderland/zookeeper
ports:
- containerPort: 2181
使用此配置，一切正常。但我想添加更多kafka副本。如果我尝试添加另一个副本，则会收到此错误：
Error connecting to node kafka-1.kafka.kafka.svc.cluster.local:9093 (id: 1 rack: null) (org.apache.kafka.clients.NetworkClient)
java.io.IOException: Can't resolve address: kafka-1.kafka.kafka.svc.cluster.local:9093
我不知道在哪里设置了“ kafka-1.kafka.kafka.svc.cluster.local”，如果可以的话。我可以看到一个解决方案是为每个Pod创建一个服务，但是采用这种方法，群集很难扩展。
我可以将我的kafka配置为有状态，以便在没有任何其他服务的情况下彼此发现吗？
编辑：
只有一个副本的配置仅在群集中有效，如果我尝试从外部访问代理，则会收到异常：
Can't resolve address: kafka-0.kafka.kafka.svc.cluster.local:9093
谢谢
答案 0 :(得分：1)
您需要将服务定义中的.metadata.name和部署定义中的.spec.serviceName设置为相同的名称，并且该服务应为无头服务，并在您的设置中使用'clusterIP: None' ，则可以将kafka-0.kafka.kafka.svc.cluster.local解析为Pod ip。