在本地基于docker运行hazelcast

Question

我想基于aws实例中的docker运行Hazelcast for POC，以备将来使用。

我使用下一个配置在笔记本电脑上运行进行调查：

docker run -e JAVA_OPTS="-Dhazelcast.local.publicAddress=192.168.1.227:5701" -itd -p 5701:5701 hazelcast/hazelcast
docker run -e JAVA_OPTS="-Dhazelcast.local.publicAddress=192.168.1.227:5702" -itd -p 5702:5701 hazelcast/hazelcast

它开始正常，但是一旦尝试在浏览器中打开它，我会收到下一个警告：

    docker logs -ft a91ed298117a

2020-02-02T16:30:41.846203500Z ########################################
2020-02-02T16:30:41.846284000Z # JAVA_OPTS=-Dhazelcast.mancenter.enabled=false -Djava.net.preferIPv4Stack=true -Djava.util.logging.config.file=/opt/hazelcast/logging.properties -XX:MaxRAMPercentage=80.0 -Dhazelcast.local.publicAddress=192.168.1.227:5702
2020-02-02T16:30:41.846346700Z # CLASSPATH=/opt/hazelcast/*:/opt/hazelcast/lib/*
2020-02-02T16:30:41.846374200Z # starting now....
2020-02-02T16:30:41.846424700Z ########################################
2020-02-02T16:30:41.846467100Z + exec java -server -Dhazelcast.mancenter.enabled=false -Djava.net.preferIPv4Stack=true -Djava.util.logging.config.file=/opt/hazelcast/logging.properties -XX:MaxRAMPercentage=80.0 -Dhazelcast.local.publicAddress=192.168.1.227:5702 com.hazelcast.core.server.StartServer

Members {size:2, ver:2} [
2020-02-02T16:30:52.360102700Z  Member [192.168.1.227]:5701 - e152d11b-df3e-4c29-a363-188842fc624c
2020-02-02T16:30:52.360128200Z  Member [192.168.1.227]:5702 - e7811c67-34ef-4ec5-9687-1945d7c36b69 this
2020-02-02T16:30:52.360159400Z ]
2020-02-02T16:30:52.360183200Z
2020-02-02T16:30:53.384531200Z Feb 02, 2020 4:30:53 PM com.hazelcast.core.LifecycleService
2020-02-02T16:30:53.384586000Z INFO: [192.168.1.227]:5702 [dev] [3.12.6] [192.168.1.227]:5702 is STARTED
2020-02-02T16:31:00.582731400Z Feb 02, 2020 4:31:00 PM com.hazelcast.nio.tcp.TcpIpConnection
2020-02-02T16:31:00.582871900Z WARNING: [192.168.1.227]:5702 [dev] [3.12.6] Connection[id=2, /172.17.0.3:5701->/172.17.0.1:60574, qualifier=null, endpoint=null, alive=false, type=NONE] closed. Reason: Exception in Connection[id=2, /172.17.0.3:5701->/172.17.0.1:60574, qualifier=null, endpoint=null, alive=true, type=NONE], thread=hz._hzInstance_1_dev.IO.thread-in-1
2020-02-02T16:31:00.582909200Z java.lang.IllegalStateException: REST API is not enabled.
2020-02-02T16:31:00.583013000Z  at com.hazelcast.nio.tcp.UnifiedProtocolDecoder.onRead(UnifiedProtocolDecoder.java:96)
2020-02-02T16:31:00.583049600Z  at com.hazelcast.internal.networking.nio.NioInboundPipeline.process(NioInboundPipeline.java:135)
2020-02-02T16:31:00.583077900Z  at com.hazelcast.internal.networking.nio.NioThread.processSelectionKey(NioThread.java:369)
2020-02-02T16:31:00.583122400Z  at com.hazelcast.internal.networking.nio.NioThread.processSelectionKeys(NioThread.java:354)
2020-02-02T16:31:00.583189100Z  at com.hazelcast.internal.networking.nio.NioThread.selectLoop(NioThread.java:280)
2020-02-02T16:31:00.583220000Z  at com.hazelcast.internal.networking.nio.NioThread.run(NioThread.java:235)
2020-02-02T16:31:00.583249400Z
2020-02-02T16:31:00.604505300Z Feb 02, 2020 4:31:00 PM com.hazelcast.nio.tcp.TcpIpConnection

您能帮我了解我哪里出错了吗？

Answer 1

Hazelcast REST API已默认未启用，这就是为什么您在日志中得到异常的原因。另外，请记住，在浏览器中打开Hazelcast没有太大意义，因为它不提供任何HTTP网页。

表示您已在Docker中成功运行Hazelcast集群。现在，如果您想使用它，最简单的方法是启用REST API或使用您选择的语言并与Hazelcast客户端连接。

1。 REST API

要在启用REST API的情况下启动Hazelcast，您需要将-Dhazelcast.rest.enabled=true添加到JAVA_OPTS。因此，您可以运行以下命令：

docker run -e JAVA_OPTS="-Dhazelcast.local.publicAddress=192.168.1.227:5701 -Dhazelcast.rest.enabled=true" -itd -p 5701:5701 hazelcast/hazelcast:3.12.6
docker run -e JAVA_OPTS="-Dhazelcast.local.publicAddress=192.168.1.227:5702 -Dhazelcast.rest.enabled=true" -itd -p 5702:5701 hazelcast/hazelcast:3.12.6

然后，您可以使用Hazelcast REST API，例如从地图中添加和读取值：

$ curl -X POST 192.168.1.227:5701/hazelcast/rest/maps/mapName/foo -d "bar"
$ curl 192.168.1.227:5701/hazelcast/rest/maps/mapName/foo
bar

2。 Hazelcast客户端

[大多数编程语言都有Hazelcast客户端。您只需指定192.168.1.227:5701和192.168.1.227:5702作为Hazelcast群集的地址。例如，在Python中，它看起来像这样。

import hazelcast

config = hazelcast.ClientConfig()
config.network_config.addresses.append("192.168.1.227:5701")
config.network_config.addresses.append("192.168.1.227:5702")
client = hazelcast.HazelcastClient(config)

my_map = client.get_map("map")
my_map.put("key", "value")

client.shutdown()

然后，您可以使用以下命令运行它：

pip install hazelcast-python-client && python client.py