使用 Java (Windows) 连接到 Docker 内的 MongoDB 副本集 运行
Connect to MongoDB Replica Set running inside Docker with Java (Windows)
我想用 docker 设置一个 MongoDB 副本集。设置似乎没问题，但我无法使用我的 Java-app 连接到集群。我在 运行ning Docker 版本 17.06.0-ce Windows 10 上使用 VirtualBox 作为驱动程序。
我遵循了本教程中的说明：http://www.sohamkamani.com/blog/2016/06/30/docker-mongo-replica-set/
所以我首先使用以下命令在 docker 和 运行 3 个容器中创建了 my-mongo-cluster 网络：
$ docker run --name mongo1 -d --net mongo-cluster -p 9042:27017 mongo:3.6.0 mongod --replSet my-mongo-set
$ docker run --name mongo2 -d --net mongo-cluster -p 9142:27017 mongo:3.6.0 mongod --replSet my-mongo-set
$ docker run --name mongo3 -d --net mongo-cluster -p 9242:27017 mongo:3.6.0 mongod --replSet my-mongo-set
然后我连接到 mongo1 容器并使用以下配置设置副本集：
config = {"_id" : "my-mongo-set", "members" : [{"_id" : 0,"host" : "mongo1:27017"},{"_id" : 1,"host" : "mongo2:27017"},{"_id" : 2,"host" : "mongo3:27017"}]}
rs.initiate(config)
这似乎工作得很好。正如我从 mongo1 容器的日志中可以看出的那样，所有容器都相互连接。
现在我正在尝试从我的 Java-app 连接到副本集。我使用的是 mongodb-driver 版本 3.6.0。
这是我用来连接副本集 运行ning in docker:
的代码
List<ServerAddress> serverAddresses = new ArrayList<ServerAddress>();
serverAddresses.add(new ServerAddress(InetAddress.getByName("192.168.99.100"), 9042));
serverAddresses.add(new ServerAddress(InetAddress.getByName("192.168.99.100"), 9142));
serverAddresses.add(new ServerAddress(InetAddress.getByName("192.168.99.100"), 9242));
MongoClient client = new MongoClient(serverAddresses);
这是日志输出（末尾的 MongoSocketException 也出现在 mongo1:27017 和 mongo2:27017 中）：
Dez 27, 2017 9:36:07 PM com.mongodb.diagnostics.logging.JULLogger log
INFORMATION: Cluster created with settings {hosts=[192.168.99.100:9042, 192.168.99.100:9142, 192.168.99.100:9242], mode=MULTIPLE, requiredClusterType=UNKNOWN, serverSelectionTimeout='30000 ms', maxWaitQueueSize=500}
Dez 27, 2017 9:36:07 PM com.mongodb.diagnostics.logging.JULLogger log
INFORMATION: Adding discovered server 192.168.99.100:9042 to client view of cluster
Dez 27, 2017 9:36:07 PM com.mongodb.diagnostics.logging.JULLogger log
INFORMATION: Adding discovered server 192.168.99.100:9142 to client view of cluster
Dez 27, 2017 9:36:07 PM com.mongodb.diagnostics.logging.JULLogger log
INFORMATION: Adding discovered server 192.168.99.100:9242 to client view of cluster
Dez 27, 2017 9:36:07 PM com.mongodb.diagnostics.logging.JULLogger log
INFORMATION: Cluster description not yet available. Waiting for 30000 ms before timing out
Dez 27, 2017 9:36:07 PM com.mongodb.diagnostics.logging.JULLogger log
INFORMATION: Opened connection [connectionId{localValue:2, serverValue:5}] to 192.168.99.100:9142
Dez 27, 2017 9:36:07 PM com.mongodb.diagnostics.logging.JULLogger log
INFORMATION: Opened connection [connectionId{localValue:1, serverValue:14}] to 192.168.99.100:9042
Dez 27, 2017 9:36:07 PM com.mongodb.diagnostics.logging.JULLogger log
INFORMATION: Opened connection [connectionId{localValue:3, serverValue:5}] to 192.168.99.100:9242
Dez 27, 2017 9:36:07 PM com.mongodb.diagnostics.logging.JULLogger log
INFORMATION: Monitor thread successfully connected to server with description ServerDescription{address=192.168.99.100:9242, type=REPLICA_SET_SECONDARY, state=CONNECTED, ok=true, version=ServerVersion{versionList=[3, 6, 0]}, minWireVersion=0, maxWireVersion=6, maxDocumentSize=16777216, logicalSessionTimeoutMinutes=30, roundTripTimeNanos=5002651, setName='my-mongo-set', canonicalAddress=mongo3:27017, hosts=[mongo3:27017, mongo2:27017, mongo1:27017], passives=[], arbiters=[], primary='mongo1:27017', tagSet=TagSet{[]}, electionId=null, setVersion=1, lastWriteDate=Wed Dec 27 21:36:00 CET 2017, lastUpdateTimeNanos=440549516217673}
Dez 27, 2017 9:36:07 PM com.mongodb.diagnostics.logging.JULLogger log
INFORMATION: Monitor thread successfully connected to server with description ServerDescription{address=192.168.99.100:9142, type=REPLICA_SET_SECONDARY, state=CONNECTED, ok=true, version=ServerVersion{versionList=[3, 6, 0]}, minWireVersion=0, maxWireVersion=6, maxDocumentSize=16777216, logicalSessionTimeoutMinutes=30, roundTripTimeNanos=5542139, setName='my-mongo-set', canonicalAddress=mongo2:27017, hosts=[mongo3:27017, mongo2:27017, mongo1:27017], passives=[], arbiters=[], primary='mongo1:27017', tagSet=TagSet{[]}, electionId=null, setVersion=1, lastWriteDate=Wed Dec 27 21:36:00 CET 2017, lastUpdateTimeNanos=440549516254709}
Dez 27, 2017 9:36:07 PM com.mongodb.diagnostics.logging.JULLogger log
INFORMATION: Monitor thread successfully connected to server with description ServerDescription{address=192.168.99.100:9042, type=REPLICA_SET_PRIMARY, state=CONNECTED, ok=true, version=ServerVersion{versionList=[3, 6, 0]}, minWireVersion=0, maxWireVersion=6, maxDocumentSize=16777216, logicalSessionTimeoutMinutes=30, roundTripTimeNanos=4113767, setName='my-mongo-set', canonicalAddress=mongo1:27017, hosts=[mongo3:27017, mongo2:27017, mongo1:27017], passives=[], arbiters=[], primary='mongo1:27017', tagSet=TagSet{[]}, electionId=7fffffff0000000000000001, setVersion=1, lastWriteDate=Wed Dec 27 21:36:00 CET 2017, lastUpdateTimeNanos=440549515190458}
Dez 27, 2017 9:36:07 PM com.mongodb.diagnostics.logging.JULLogger log
INFORMATION: Discovered cluster type of REPLICA_SET
Dez 27, 2017 9:36:07 PM com.mongodb.diagnostics.logging.JULLogger log
INFORMATION: Adding discovered server mongo3:27017 to client view of cluster
Dez 27, 2017 9:36:07 PM com.mongodb.diagnostics.logging.JULLogger log
INFORMATION: Adding discovered server mongo2:27017 to client view of cluster
Dez 27, 2017 9:36:07 PM com.mongodb.diagnostics.logging.JULLogger log
INFORMATION: Adding discovered server mongo1:27017 to client view of cluster
Dez 27, 2017 9:36:07 PM com.mongodb.diagnostics.logging.JULLogger log
INFORMATION: Canonical address mongo2:27017 does not match server address. Removing 192.168.99.100:9142 from client view of cluster
Dez 27, 2017 9:36:07 PM com.mongodb.diagnostics.logging.JULLogger log
INFORMATION: Server 192.168.99.100:9242 is no longer a member of the replica set. Removing from client view of cluster.
Dez 27, 2017 9:36:07 PM com.mongodb.diagnostics.logging.JULLogger log
INFORMATION: Server 192.168.99.100:9042 is no longer a member of the replica set. Removing from client view of cluster.
Dez 27, 2017 9:36:07 PM com.mongodb.diagnostics.logging.JULLogger log
INFORMATION: Canonical address mongo1:27017 does not match server address. Removing 192.168.99.100:9042 from client view of cluster
Dez 27, 2017 9:36:07 PM com.mongodb.diagnostics.logging.JULLogger log
INFORMATION: No server chosen by com.mongodb.Mongo@67784306 from cluster description ClusterDescription{type=REPLICA_SET, connectionMode=MULTIPLE, serverDescriptions=[ServerDescription{address=192.168.99.100:9242, type=UNKNOWN, state=CONNECTING}, ServerDescription{address=mongo3:27017, type=UNKNOWN, state=CONNECTING}, ServerDescription{address=mongo2:27017, type=UNKNOWN, state=CONNECTING}, ServerDescription{address=mongo1:27017, type=UNKNOWN, state=CONNECTING}, ServerDescription{address=192.168.99.100:9042, type=UNKNOWN, state=CONNECTING}]}. Waiting for 30000 ms before timing out
Dez 27, 2017 9:36:09 PM com.mongodb.diagnostics.logging.JULLogger log
INFORMATION: Exception in monitor thread while connecting to server mongo3:27017
com.mongodb.MongoSocketException: mongo3
at com.mongodb.ServerAddress.getSocketAddress(ServerAddress.java:188)
at com.mongodb.connection.SocketStreamHelper.initialize(SocketStreamHelper.java:59)
at com.mongodb.connection.SocketStream.open(SocketStream.java:57)
at com.mongodb.connection.InternalStreamConnection.open(InternalStreamConnection.java:126)
at com.mongodb.connection.DefaultServerMonitor$ServerMonitorRunnable.run(DefaultServerMonitor.java:114)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.net.UnknownHostException: mongo3
at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
at java.net.InetAddress.lookupAllHostAddr(InetAddress.java:928)
at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1323)
at java.net.InetAddress.getAllByName0(InetAddress.java:1276)
at java.net.InetAddress.getAllByName(InetAddress.java:1192)
at java.net.InetAddress.getAllByName(InetAddress.java:1126)
at java.net.InetAddress.getByName(InetAddress.java:1076)
at com.mongodb.ServerAddress.getSocketAddress(ServerAddress.java:186)
... 5 more
问题是您的副本集节点在端口 9x42 的外部可见，但这些节点的内部（配置）地址是 27017。两者都必须是 same.So，当您开始 mongod 时，您必须提供--port 与在容器外部使用的端口号相同的参数。
最后我通过阅读找到了解决方案：
最后一句很重要：
"In conclusion, to support key features of replica sets, we require that the hostnames used in a replica set config are reachable from the client."
所以这意味着配置中的主机名必须是来自外部的 visible/accessible。但是由于我在 运行 Docker 上 Windows 使用 VirtualBox，MongoClient 只能看到我的 VM 的 IP 而无法处理 mongo1、mongo2、mongo3（分别是容器）。
解决方案是将主机名添加到主机文件中（在位于 C:/Windows/System32/drivers/etc/hosts 的 Windows 中）：
192.168.99.100 mongo1
192.168.99.100 mongo2
192.168.99.100 mongo3
将主机名添加到主机文件对我不起作用。我认为如果所有主机名都引用相同的主机 IP（例如 127.0.0.1），如果所有 docker 端口都相同（例如 27017），它将无法工作。副本集是由mongo1:27017, mongo2:27017 and mongo3:27017里面docker组成的。在 docker 之外，它对应于 127.0.0.1:27017, 127.0.0.1:27017 and 127.0.0.1:27017，这是行不通的。为了解决这个问题，我必须为每个节点设置不同的端口。
docker network create mongo-cluster
docker run --name mongo1 -d --net mongo-cluster -p 9042:9042 mongo:3.6 mongod --replSet docker-rs --port 9042
docker run --name mongo2 -d --net mongo-cluster -p 9142:9142 mongo:3.6 mongod --replSet docker-rs --port 9142
docker run --name mongo3 -d --net mongo-cluster -p 9242:9242 mongo:3.6 mongod --replSet docker-rs --port 9242
docker exec -it mongo1 mongo --port 9042
config = {"_id" : "docker-rs", "members" : [{"_id" : 0,"host" : "mongo1:9042"},{"_id" : 1,"host" : "mongo2:9142"},{"_id" : 2,"host" : "mongo3:9242"}]}
rs.initiate(config)
rs.status()
最后将主机名添加到主机文件
127.0.0.1 mongo1 mongo2 mongo3
我想用 docker 设置一个 MongoDB 副本集。设置似乎没问题，但我无法使用我的 Java-app 连接到集群。我在 运行ning Docker 版本 17.06.0-ce Windows 10 上使用 VirtualBox 作为驱动程序。
我遵循了本教程中的说明：http://www.sohamkamani.com/blog/2016/06/30/docker-mongo-replica-set/
所以我首先使用以下命令在 docker 和 运行 3 个容器中创建了 my-mongo-cluster 网络：
$ docker run --name mongo1 -d --net mongo-cluster -p 9042:27017 mongo:3.6.0 mongod --replSet my-mongo-set
$ docker run --name mongo2 -d --net mongo-cluster -p 9142:27017 mongo:3.6.0 mongod --replSet my-mongo-set
$ docker run --name mongo3 -d --net mongo-cluster -p 9242:27017 mongo:3.6.0 mongod --replSet my-mongo-set
然后我连接到 mongo1 容器并使用以下配置设置副本集：
config = {"_id" : "my-mongo-set", "members" : [{"_id" : 0,"host" : "mongo1:27017"},{"_id" : 1,"host" : "mongo2:27017"},{"_id" : 2,"host" : "mongo3:27017"}]}
rs.initiate(config)
这似乎工作得很好。正如我从 mongo1 容器的日志中可以看出的那样，所有容器都相互连接。
现在我正在尝试从我的 Java-app 连接到副本集。我使用的是 mongodb-driver 版本 3.6.0。 这是我用来连接副本集 运行ning in docker:
的代码List<ServerAddress> serverAddresses = new ArrayList<ServerAddress>();
serverAddresses.add(new ServerAddress(InetAddress.getByName("192.168.99.100"), 9042));
serverAddresses.add(new ServerAddress(InetAddress.getByName("192.168.99.100"), 9142));
serverAddresses.add(new ServerAddress(InetAddress.getByName("192.168.99.100"), 9242));
MongoClient client = new MongoClient(serverAddresses);
这是日志输出（末尾的 MongoSocketException 也出现在 mongo1:27017 和 mongo2:27017 中）：
Dez 27, 2017 9:36:07 PM com.mongodb.diagnostics.logging.JULLogger log
INFORMATION: Cluster created with settings {hosts=[192.168.99.100:9042, 192.168.99.100:9142, 192.168.99.100:9242], mode=MULTIPLE, requiredClusterType=UNKNOWN, serverSelectionTimeout='30000 ms', maxWaitQueueSize=500}
Dez 27, 2017 9:36:07 PM com.mongodb.diagnostics.logging.JULLogger log
INFORMATION: Adding discovered server 192.168.99.100:9042 to client view of cluster
Dez 27, 2017 9:36:07 PM com.mongodb.diagnostics.logging.JULLogger log
INFORMATION: Adding discovered server 192.168.99.100:9142 to client view of cluster
Dez 27, 2017 9:36:07 PM com.mongodb.diagnostics.logging.JULLogger log
INFORMATION: Adding discovered server 192.168.99.100:9242 to client view of cluster
Dez 27, 2017 9:36:07 PM com.mongodb.diagnostics.logging.JULLogger log
INFORMATION: Cluster description not yet available. Waiting for 30000 ms before timing out
Dez 27, 2017 9:36:07 PM com.mongodb.diagnostics.logging.JULLogger log
INFORMATION: Opened connection [connectionId{localValue:2, serverValue:5}] to 192.168.99.100:9142
Dez 27, 2017 9:36:07 PM com.mongodb.diagnostics.logging.JULLogger log
INFORMATION: Opened connection [connectionId{localValue:1, serverValue:14}] to 192.168.99.100:9042
Dez 27, 2017 9:36:07 PM com.mongodb.diagnostics.logging.JULLogger log
INFORMATION: Opened connection [connectionId{localValue:3, serverValue:5}] to 192.168.99.100:9242
Dez 27, 2017 9:36:07 PM com.mongodb.diagnostics.logging.JULLogger log
INFORMATION: Monitor thread successfully connected to server with description ServerDescription{address=192.168.99.100:9242, type=REPLICA_SET_SECONDARY, state=CONNECTED, ok=true, version=ServerVersion{versionList=[3, 6, 0]}, minWireVersion=0, maxWireVersion=6, maxDocumentSize=16777216, logicalSessionTimeoutMinutes=30, roundTripTimeNanos=5002651, setName='my-mongo-set', canonicalAddress=mongo3:27017, hosts=[mongo3:27017, mongo2:27017, mongo1:27017], passives=[], arbiters=[], primary='mongo1:27017', tagSet=TagSet{[]}, electionId=null, setVersion=1, lastWriteDate=Wed Dec 27 21:36:00 CET 2017, lastUpdateTimeNanos=440549516217673}
Dez 27, 2017 9:36:07 PM com.mongodb.diagnostics.logging.JULLogger log
INFORMATION: Monitor thread successfully connected to server with description ServerDescription{address=192.168.99.100:9142, type=REPLICA_SET_SECONDARY, state=CONNECTED, ok=true, version=ServerVersion{versionList=[3, 6, 0]}, minWireVersion=0, maxWireVersion=6, maxDocumentSize=16777216, logicalSessionTimeoutMinutes=30, roundTripTimeNanos=5542139, setName='my-mongo-set', canonicalAddress=mongo2:27017, hosts=[mongo3:27017, mongo2:27017, mongo1:27017], passives=[], arbiters=[], primary='mongo1:27017', tagSet=TagSet{[]}, electionId=null, setVersion=1, lastWriteDate=Wed Dec 27 21:36:00 CET 2017, lastUpdateTimeNanos=440549516254709}
Dez 27, 2017 9:36:07 PM com.mongodb.diagnostics.logging.JULLogger log
INFORMATION: Monitor thread successfully connected to server with description ServerDescription{address=192.168.99.100:9042, type=REPLICA_SET_PRIMARY, state=CONNECTED, ok=true, version=ServerVersion{versionList=[3, 6, 0]}, minWireVersion=0, maxWireVersion=6, maxDocumentSize=16777216, logicalSessionTimeoutMinutes=30, roundTripTimeNanos=4113767, setName='my-mongo-set', canonicalAddress=mongo1:27017, hosts=[mongo3:27017, mongo2:27017, mongo1:27017], passives=[], arbiters=[], primary='mongo1:27017', tagSet=TagSet{[]}, electionId=7fffffff0000000000000001, setVersion=1, lastWriteDate=Wed Dec 27 21:36:00 CET 2017, lastUpdateTimeNanos=440549515190458}
Dez 27, 2017 9:36:07 PM com.mongodb.diagnostics.logging.JULLogger log
INFORMATION: Discovered cluster type of REPLICA_SET
Dez 27, 2017 9:36:07 PM com.mongodb.diagnostics.logging.JULLogger log
INFORMATION: Adding discovered server mongo3:27017 to client view of cluster
Dez 27, 2017 9:36:07 PM com.mongodb.diagnostics.logging.JULLogger log
INFORMATION: Adding discovered server mongo2:27017 to client view of cluster
Dez 27, 2017 9:36:07 PM com.mongodb.diagnostics.logging.JULLogger log
INFORMATION: Adding discovered server mongo1:27017 to client view of cluster
Dez 27, 2017 9:36:07 PM com.mongodb.diagnostics.logging.JULLogger log
INFORMATION: Canonical address mongo2:27017 does not match server address. Removing 192.168.99.100:9142 from client view of cluster
Dez 27, 2017 9:36:07 PM com.mongodb.diagnostics.logging.JULLogger log
INFORMATION: Server 192.168.99.100:9242 is no longer a member of the replica set. Removing from client view of cluster.
Dez 27, 2017 9:36:07 PM com.mongodb.diagnostics.logging.JULLogger log
INFORMATION: Server 192.168.99.100:9042 is no longer a member of the replica set. Removing from client view of cluster.
Dez 27, 2017 9:36:07 PM com.mongodb.diagnostics.logging.JULLogger log
INFORMATION: Canonical address mongo1:27017 does not match server address. Removing 192.168.99.100:9042 from client view of cluster
Dez 27, 2017 9:36:07 PM com.mongodb.diagnostics.logging.JULLogger log
INFORMATION: No server chosen by com.mongodb.Mongo@67784306 from cluster description ClusterDescription{type=REPLICA_SET, connectionMode=MULTIPLE, serverDescriptions=[ServerDescription{address=192.168.99.100:9242, type=UNKNOWN, state=CONNECTING}, ServerDescription{address=mongo3:27017, type=UNKNOWN, state=CONNECTING}, ServerDescription{address=mongo2:27017, type=UNKNOWN, state=CONNECTING}, ServerDescription{address=mongo1:27017, type=UNKNOWN, state=CONNECTING}, ServerDescription{address=192.168.99.100:9042, type=UNKNOWN, state=CONNECTING}]}. Waiting for 30000 ms before timing out
Dez 27, 2017 9:36:09 PM com.mongodb.diagnostics.logging.JULLogger log
INFORMATION: Exception in monitor thread while connecting to server mongo3:27017
com.mongodb.MongoSocketException: mongo3
at com.mongodb.ServerAddress.getSocketAddress(ServerAddress.java:188)
at com.mongodb.connection.SocketStreamHelper.initialize(SocketStreamHelper.java:59)
at com.mongodb.connection.SocketStream.open(SocketStream.java:57)
at com.mongodb.connection.InternalStreamConnection.open(InternalStreamConnection.java:126)
at com.mongodb.connection.DefaultServerMonitor$ServerMonitorRunnable.run(DefaultServerMonitor.java:114)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.net.UnknownHostException: mongo3
at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
at java.net.InetAddress.lookupAllHostAddr(InetAddress.java:928)
at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1323)
at java.net.InetAddress.getAllByName0(InetAddress.java:1276)
at java.net.InetAddress.getAllByName(InetAddress.java:1192)
at java.net.InetAddress.getAllByName(InetAddress.java:1126)
at java.net.InetAddress.getByName(InetAddress.java:1076)
at com.mongodb.ServerAddress.getSocketAddress(ServerAddress.java:186)
... 5 more
问题是您的副本集节点在端口 9x42 的外部可见，但这些节点的内部（配置）地址是 27017。两者都必须是 same.So，当您开始 mongod 时，您必须提供--port 与在容器外部使用的端口号相同的参数。
最后我通过阅读找到了解决方案：
最后一句很重要： "In conclusion, to support key features of replica sets, we require that the hostnames used in a replica set config are reachable from the client."
所以这意味着配置中的主机名必须是来自外部的 visible/accessible。但是由于我在 运行 Docker 上 Windows 使用 VirtualBox，MongoClient 只能看到我的 VM 的 IP 而无法处理 mongo1、mongo2、mongo3（分别是容器）。
解决方案是将主机名添加到主机文件中（在位于 C:/Windows/System32/drivers/etc/hosts 的 Windows 中）：
192.168.99.100 mongo1
192.168.99.100 mongo2
192.168.99.100 mongo3
将主机名添加到主机文件对我不起作用。我认为如果所有主机名都引用相同的主机 IP（例如 127.0.0.1），如果所有 docker 端口都相同（例如 27017），它将无法工作。副本集是由mongo1:27017, mongo2:27017 and mongo3:27017里面docker组成的。在 docker 之外，它对应于 127.0.0.1:27017, 127.0.0.1:27017 and 127.0.0.1:27017，这是行不通的。为了解决这个问题，我必须为每个节点设置不同的端口。
docker network create mongo-cluster
docker run --name mongo1 -d --net mongo-cluster -p 9042:9042 mongo:3.6 mongod --replSet docker-rs --port 9042
docker run --name mongo2 -d --net mongo-cluster -p 9142:9142 mongo:3.6 mongod --replSet docker-rs --port 9142
docker run --name mongo3 -d --net mongo-cluster -p 9242:9242 mongo:3.6 mongod --replSet docker-rs --port 9242
docker exec -it mongo1 mongo --port 9042
config = {"_id" : "docker-rs", "members" : [{"_id" : 0,"host" : "mongo1:9042"},{"_id" : 1,"host" : "mongo2:9142"},{"_id" : 2,"host" : "mongo3:9242"}]}
rs.initiate(config)
rs.status()
最后将主机名添加到主机文件
127.0.0.1 mongo1 mongo2 mongo3