Error connecting to Node(endPoint=/127.0.0.1:9042 #3654

raphael10-collab · 2023-03-09T09:41:19Z

raphael10-collab
Mar 9, 2023

I installed and set in a cloud's VPS a v8ssandra node :

root@vmi1231861:~# docker ps -a
CONTAINER ID   IMAGE                  COMMAND                  CREATED        STATUS        PORTS                                                                                                     NAMES
2c83d209be03   kindest/node:v1.25.3   "/usr/local/bin/entr…"   26 hours ago   Up 26 hours   0.0.0.0:30080->30080/tcp, 0.0.0.0:30443->30443/tcp, 0.0.0.0:30942->30942/tcp, 127.0.0.1:43263->6443/tcp   k8ssandra-0-control-plane
0c1548e123a1   kindest/node:v1.25.3   "/usr/local/bin/entr…"   26 hours ago   Up 26 hours                                                                                                             k8ssandra-0-worker3
ae0e54a2f510   kindest/node:v1.25.3   "/usr/local/bin/entr…"   26 hours ago   Up 26 hours                                                                                                             k8ssandra-0-worker2
f683494db5f5   kindest/node:v1.25.3   "/usr/local/bin/entr…"   26 hours ago   Up 26 hours                                                                                                             k8ssandra-0-worker
74738f0ee6ff   kindest/node:v1.25.3   "/usr/local/bin/entr…"   26 hours ago   Up 26 hours                                                                                                             k8ssandra-0-worker4
ed00413b9b98   registry:2             "/entrypoint.sh /etc…"   26 hours ago   Up 26 hours   0.0.0.0:5000->5000/tcp                                                                                    kind-registry

In a file janusgraph-env.txt I defined the configuration's environment variables :

janusgraph.storage.backend=cql
janusgraph.storage.hostname=127.0.0.1
janusgraph.cluster.max-partitions=32

And run the janusgraph docker container passing the environment variables :

root@vmi1231861:~# docker run --env-file ./janusgraph-env.txt --name janusgraph-default janusgraph/janusgraph:latest
waiting for storage...
waiting for storage...
waiting for storage...
/etc/opt/janusgraph/janusgraph-server.yaml will be used to start JanusGraph Server in foreground
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/opt/janusgraph/lib/logback-classic-1.2.11.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/opt/janusgraph/lib/slf4j-reload4j-1.7.36.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [ch.qos.logback.classic.util.ContextSelectorStaticBinder]
09:37:09 WARN  com.datastax.oss.driver.internal.core.control.ControlConnection - [JanusGraph Session] Error connecting to Node(endPoint=/127.0.0.1:9042, hostId=null, hashCode=269b1ea6), trying next node (ConnectionInitException: [JanusGraph Session|control|connecting...] Protocol initialization request, step 1 (OPTIONS): failed to send request (io.netty.channel.StacklessClosedChannelException))
09:37:09 WARN  org.apache.tinkerpop.gremlin.server.util.DefaultGraphManager - Graph [graph] configured at [/etc/opt/janusgraph/janusgraph.properties] could not be instantiated and will not be available in Gremlin Server.  GraphFactory message: GraphFactory could not instantiate this Graph implementation [class org.janusgraph.core.JanusGraphFactory]
java.lang.RuntimeException: GraphFactory could not instantiate this Graph implementation [class org.janusgraph.core.JanusGraphFactory]
    at org.apache.tinkerpop.gremlin.structure.util.GraphFactory.open(GraphFactory.java:84)
    at org.apache.tinkerpop.gremlin.structure.util.GraphFactory.open(GraphFactory.java:72)
    at org.apache.tinkerpop.gremlin.structure.util.GraphFactory.open(GraphFactory.java:106)
    at org.apache.tinkerpop.gremlin.server.util.DefaultGraphManager.addGraph(DefaultGraphManager.java:63)
    at java.util.LinkedHashMap.forEach(LinkedHashMap.java:684)
    at org.apache.tinkerpop.gremlin.server.util.DefaultGraphManager.<init>(DefaultGraphManager.java:58)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    at org.apache.tinkerpop.gremlin.server.util.ServerGremlinExecutor.<init>(ServerGremlinExecutor.java:86)
    at org.apache.tinkerpop.gremlin.server.GremlinServer.<init>(GremlinServer.java:127)
    at org.apache.tinkerpop.gremlin.server.GremlinServer.<init>(GremlinServer.java:90)
    at org.janusgraph.graphdb.server.JanusGraphServer.start(JanusGraphServer.java:85)
    at org.janusgraph.graphdb.server.JanusGraphServer.main(JanusGraphServer.java:53)
Caused by: java.lang.reflect.InvocationTargetException: null
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.apache.tinkerpop.gremlin.structure.util.GraphFactory.open(GraphFactory.java:80)
    ... 14 common frames omitted
Caused by: java.lang.IllegalArgumentException: Could not instantiate implementation: org.janusgraph.diskstorage.cql.CQLStoreManager
    at org.janusgraph.util.system.ConfigurationUtil.instantiate(ConfigurationUtil.java:79)
    at org.janusgraph.diskstorage.Backend.getImplementationClass(Backend.java:527)
    at org.janusgraph.diskstorage.Backend.getStorageManager(Backend.java:491)
    at org.janusgraph.graphdb.configuration.builder.GraphDatabaseConfigurationBuilder.build(GraphDatabaseConfigurationBuilder.java:64)
    at org.janusgraph.core.JanusGraphFactory.open(JanusGraphFactory.java:176)
    at org.janusgraph.core.JanusGraphFactory.open(JanusGraphFactory.java:147)
    at org.janusgraph.core.JanusGraphFactory.open(JanusGraphFactory.java:127)
    ... 19 common frames omitted
Caused by: java.lang.reflect.InvocationTargetException: null
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    at org.janusgraph.util.system.ConfigurationUtil.instantiate(ConfigurationUtil.java:73)
    ... 25 common frames omitted
Caused by: com.datastax.oss.driver.api.core.AllNodesFailedException: Could not reach any contact point, make sure you've provided valid addresses (showing first 1 nodes, use getAllErrors() for more): Node(endPoint=/127.0.0.1:9042, hostId=null, hashCode=269b1ea6): [com.datastax.oss.driver.api.core.connection.ConnectionInitException: [JanusGraph Session|control|connecting...] Protocol initialization request, step 1 (OPTIONS): failed to send request (io.netty.channel.StacklessClosedChannelException)]
    at com.datastax.oss.driver.api.core.AllNodesFailedException.copy(AllNodesFailedException.java:141)
    at com.datastax.oss.driver.internal.core.util.concurrent.CompletableFutures.getUninterruptibly(CompletableFutures.java:149)
    at com.datastax.oss.driver.api.core.session.SessionBuilder.build(SessionBuilder.java:835)
    at org.janusgraph.diskstorage.cql.builder.CQLSessionBuilder.build(CQLSessionBuilder.java:81)
    at org.janusgraph.diskstorage.cql.CQLStoreManager.<init>(CQLStoreManager.java:135)
    at org.janusgraph.diskstorage.cql.CQLStoreManager.<init>(CQLStoreManager.java:116)
    ... 30 common frames omitted
    Suppressed: com.datastax.oss.driver.api.core.connection.ConnectionInitException: [JanusGraph Session|control|connecting...] Protocol initialization request, step 1 (OPTIONS): failed to send request (io.netty.channel.StacklessClosedChannelException)
	    at com.datastax.oss.driver.internal.core.channel.ProtocolInitHandler$InitRequest.fail(ProtocolInitHandler.java:356)
	    at com.datastax.oss.driver.internal.core.channel.ChannelHandlerRequest.writeListener(ChannelHandlerRequest.java:87)
	    at io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:590)
	    at io.netty.util.concurrent.DefaultPromise.notifyListenersNow(DefaultPromise.java:557)
	    at io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:492)
	    at io.netty.util.concurrent.DefaultPromise.addListener(DefaultPromise.java:185)
	    at io.netty.channel.DefaultChannelPromise.addListener(DefaultChannelPromise.java:95)
	    at io.netty.channel.DefaultChannelPromise.addListener(DefaultChannelPromise.java:30)
	    at com.datastax.oss.driver.internal.core.channel.ChannelHandlerRequest.send(ChannelHandlerRequest.java:76)
	    at com.datastax.oss.driver.internal.core.channel.ProtocolInitHandler$InitRequest.send(ProtocolInitHandler.java:193)
	    at com.datastax.oss.driver.internal.core.channel.ProtocolInitHandler.onRealConnect(ProtocolInitHandler.java:124)
	    at com.datastax.oss.driver.internal.core.channel.ConnectInitHandler.lambda$connect$0(ConnectInitHandler.java:57)
	    at io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:590)
	    at io.netty.util.concurrent.DefaultPromise.notifyListeners0(DefaultPromise.java:583)
	    at io.netty.util.concurrent.DefaultPromise.notifyListenersNow(DefaultPromise.java:559)
	    at io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:492)
	    at io.netty.util.concurrent.DefaultPromise.setValue0(DefaultPromise.java:636)
	    at io.netty.util.concurrent.DefaultPromise.setFailure0(DefaultPromise.java:629)
	    at io.netty.util.concurrent.DefaultPromise.tryFailure(DefaultPromise.java:118)
	    at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.fulfillConnectPromise(AbstractNioChannel.java:321)
	    at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:337)
	    at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:776)
	    at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:724)
	    at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:650)
	    at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:562)
	    at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997)
	    at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
	    at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
	    at java.lang.Thread.run(Thread.java:750)
	    Suppressed: io.netty.channel.AbstractChannel$AnnotatedConnectException: Connection refused: /127.0.0.1:9042
	    Caused by: java.net.ConnectException: Connection refused
		    at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
		    at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:716)
		    at io.netty.channel.socket.nio.NioSocketChannel.doFinishConnect(NioSocketChannel.java:337)
		    at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:334)
		    at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:776)
		    at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:724)
		    at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:650)
		    at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:562)
		    at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997)
		    at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
		    at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
		    at java.lang.Thread.run(Thread.java:750)
    Caused by: io.netty.channel.StacklessClosedChannelException: null
	    at io.netty.channel.AbstractChannel$AbstractUnsafe.flush0()(Unknown Source)
09:37:12 ERROR org.apache.tinkerpop.gremlin.jsr223.DefaultGremlinScriptEngineManager - Could not create GremlinScriptEngine for gremlin-groovy
java.lang.IllegalStateException: javax.script.ScriptException: javax.script.ScriptException: groovy.lang.MissingPropertyException: No such property: graph for class: Script1
    at org.apache.tinkerpop.gremlin.jsr223.DefaultGremlinScriptEngineManager.lambda$createGremlinScriptEngine$16(DefaultGremlinScriptEngineManager.java:464)
    at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183)
    at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
    at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1384)
    at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:647)
    at java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:272)
    at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1384)
    at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482)
    at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472)
    at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150)
    at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173)
    at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
    at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:485)
    at org.apache.tinkerpop.gremlin.jsr223.DefaultGremlinScriptEngineManager.createGremlinScriptEngine(DefaultGremlinScriptEngineManager.java:450)
    at org.apache.tinkerpop.gremlin.jsr223.DefaultGremlinScriptEngineManager.getEngineByName(DefaultGremlinScriptEngineManager.java:219)
    at org.apache.tinkerpop.gremlin.jsr223.CachedGremlinScriptEngineManager.lambda$getEngineByName$0(CachedGremlinScriptEngineManager.java:57)
    at java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1660)
    at org.apache.tinkerpop.gremlin.jsr223.CachedGremlinScriptEngineManager.getEngineByName(CachedGremlinScriptEngineManager.java:57)
    at org.apache.tinkerpop.gremlin.groovy.engine.GremlinExecutor.lambda$eval$0(GremlinExecutor.java:272)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread.java:750)
Caused by: javax.script.ScriptException: javax.script.ScriptException: groovy.lang.MissingPropertyException: No such property: graph for class: Script1
    at org.apache.tinkerpop.gremlin.groovy.jsr223.GremlinGroovyScriptEngine.eval(GremlinGroovyScriptEngine.java:381)
    at javax.script.AbstractScriptEngine.eval(AbstractScriptEngine.java:264)
    at org.apache.tinkerpop.gremlin.jsr223.DefaultGremlinScriptEngineManager.lambda$createGremlinScriptEngine$16(DefaultGremlinScriptEngineManager.java:460)
    ... 24 common frames omitted
Caused by: javax.script.ScriptException: groovy.lang.MissingPropertyException: No such property: graph for class: Script1
    at org.apache.tinkerpop.gremlin.groovy.jsr223.GremlinGroovyScriptEngine.eval(GremlinGroovyScriptEngine.java:700)
    at org.apache.tinkerpop.gremlin.groovy.jsr223.GremlinGroovyScriptEngine.eval(GremlinGroovyScriptEngine.java:379)
    ... 26 common frames omitted
Caused by: groovy.lang.MissingPropertyException: No such property: graph for class: Script1
    at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.unwrap(ScriptBytecodeAdapter.java:65)
    at org.codehaus.groovy.runtime.callsite.PogoGetPropertySite.getProperty(PogoGetPropertySite.java:51)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callGroovyObjectGetProperty(AbstractCallSite.java:309)
    at Script1.run(Script1.groovy:30)
    at org.apache.tinkerpop.gremlin.groovy.jsr223.GremlinGroovyScriptEngine.eval(GremlinGroovyScriptEngine.java:677)
    ... 27 common frames omitted
09:37:12 WARN  org.apache.tinkerpop.gremlin.server.util.ServerGremlinExecutor - Could not initialize gremlin-groovy GremlinScriptEngine as init script could not be evaluated
java.util.concurrent.CompletionException: java.lang.IllegalArgumentException: gremlin-groovy is not an available GremlinScriptEngine
    at java.util.concurrent.CompletableFuture.reportJoin(CompletableFuture.java:375)
    at java.util.concurrent.CompletableFuture.join(CompletableFuture.java:1947)
    at org.apache.tinkerpop.gremlin.server.util.ServerGremlinExecutor.lambda$new$4(ServerGremlinExecutor.java:153)
    at java.util.LinkedHashMap$LinkedKeySet.forEach(LinkedHashMap.java:559)
    at org.apache.tinkerpop.gremlin.server.util.ServerGremlinExecutor.<init>(ServerGremlinExecutor.java:145)
    at org.apache.tinkerpop.gremlin.server.GremlinServer.<init>(GremlinServer.java:127)
    at org.apache.tinkerpop.gremlin.server.GremlinServer.<init>(GremlinServer.java:90)
    at org.janusgraph.graphdb.server.JanusGraphServer.start(JanusGraphServer.java:85)
    at org.janusgraph.graphdb.server.JanusGraphServer.main(JanusGraphServer.java:53)
Caused by: java.lang.IllegalArgumentException: gremlin-groovy is not an available GremlinScriptEngine
    at org.apache.tinkerpop.gremlin.jsr223.CachedGremlinScriptEngineManager.registerLookUpInfo(CachedGremlinScriptEngineManager.java:95)
    at org.apache.tinkerpop.gremlin.jsr223.CachedGremlinScriptEngineManager.getEngineByName(CachedGremlinScriptEngineManager.java:58)
    at org.apache.tinkerpop.gremlin.groovy.engine.GremlinExecutor.lambda$eval$0(GremlinExecutor.java:272)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread.java:750)
09:37:13 WARN  org.apache.tinkerpop.gremlin.server.AbstractChannelizer - The org.apache.tinkerpop.gremlin.driver.ser.GryoMessageSerializerV3d0 serialization class is deprecated.
09:37:13 WARN  org.apache.tinkerpop.gremlin.server.AbstractChannelizer - The org.apache.tinkerpop.gremlin.driver.ser.GryoMessageSerializerV3d0 serialization class is deprecated.

Why does it not recognize the localhost? : Error connecting to Node(endPoint=/127.0.0.1:9042, hostId=null, hashCode=269b1ea6), trying next node (ConnectionInitException: [JanusGraph Session|control|connecting...] Protocol initialization request, step 1 (OPTIONS): failed to send request (io.netty.channel.StacklessClosedChannelException))

May be this kubelet issue is related ... :

root@vmi1231861:~# tail /var/log/syslog
Mar  9 11:17:37 vmi1231861 systemd[1]: Started kubelet: The Kubernetes Node Agent.
Mar  9 11:17:38 vmi1231861 kubelet[707292]: E0309 11:17:38.067012  707292 run.go:74] "command failed" err="failed to validate kubelet flags: the container runtime endpoint address was not specified or empty, use --container-runtime-endpoint to set"
Mar  9 11:17:38 vmi1231861 systemd[1]: kubelet.service: Main process exited, code=exited, status=1/FAILURE
Mar  9 11:17:38 vmi1231861 systemd[1]: kubelet.service: Failed with result 'exit-code'.
Mar  9 11:17:48 vmi1231861 systemd[1]: kubelet.service: Scheduled restart job, restart counter is at 13636.
Mar  9 11:17:48 vmi1231861 systemd[1]: Stopped kubelet: The Kubernetes Node Agent.
Mar  9 11:17:48 vmi1231861 systemd[1]: Started kubelet: The Kubernetes Node Agent.
Mar  9 11:17:48 vmi1231861 kubelet[707376]: E0309 11:17:48.255967  707376 run.go:74] "command failed" err="failed to validate kubelet flags: the container runtime endpoint address was not specified or empty, use --container-runtime-endpoint to set"
Mar  9 11:17:48 vmi1231861 systemd[1]: kubelet.service: Main process exited, code=exited, status=1/FAILURE
Mar  9 11:17:48 vmi1231861 systemd[1]: kubelet.service: Failed with result 'exit-code'.

This is /etc/containerd/config.toml :

#   Copyright 2018-2022 Docker Inc.

#   Licensed under the Apache License, Version 2.0 (the "License");
#   you may not use this file except in compliance with the License.
#   You may obtain a copy of the License at

#       http://www.apache.org/licenses/LICENSE-2.0

#   Unless required by applicable law or agreed to in writing, software
#   distributed under the License is distributed on an "AS IS" BASIS,
#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#   See the License for the specific language governing permissions and
#   limitations under the License.

disabled_plugins = ["cri"]

#root = "/var/lib/containerd"
#state = "/run/containerd"
#subreaper = true
#oom_score = 0

#[grpc]
#  address = "/run/containerd/containerd.sock"
#  uid = 0
#  gid = 0

#[debug]
#  address = "/run/containerd/debug.sock"
#  uid = 0
#  gid = 0
#  level = "info"

How to make it work?

FlorianHockmann · 2023-03-09T11:46:24Z

FlorianHockmann
Mar 9, 2023
Maintainer

As you have already put in the title: Error connecting to Node(endPoint=/127.0.0.1:9042, JanusGraph tries to connect to 127.0.0.1:9042. Your docker ps output however doesn't show that any container has that port mapped to localhost. I instead see this mapping 0.0.0.0:30942->30942/tcp which could be used intead of 9042 so I would try that port.

Even better would be if you wouldn't use localhost, but instead a DNS name that is available in Docker and which directly returns the IP address of the Cassandra containers.

3 replies

raphael10-collab Mar 9, 2023
Author

I removed the previous containers and I 've run new ones:

root@vmi1231861:~# ./setup-kind-multicluster.sh --kind-worker-nodes 1
d9fbbb80fcbb032aeb7e9791403ac1952ff45ae3275e76cf1e26a6badac07436
Creating 1 clusters...
Creating cluster 1 out of 1
Creating cluster "k8ssandra-0" ...
 ✓ Ensuring node image (kindest/node:v1.25.3) 🖼 
 ✓ Preparing nodes 📦 📦  
 ✓ Writing configuration 📜 
 ✓ Starting control-plane 🕹️ 
 ✓ Installing CNI 🔌 
 ✓ Installing StorageClass 💾 
 ✓ Joining worker nodes 🚜 
Set kubectl context to "kind-k8ssandra-0"
You can now use your cluster with:

kubectl cluster-info --context kind-k8ssandra-0

Not sure what to do next? 😅  Check out https://kind.sigs.k8s.io/docs/user/quick-start/

Generating ./build/kind-kubeconfig
Switched to context "kind-k8ssandra-0".
root@vmi1231861:~# 


root@vmi1231861:~# docker ps -a
CONTAINER ID   IMAGE                  COMMAND                  CREATED              STATUS              PORTS                                                                                                     NAMES
b9dbdebe5e87   kindest/node:v1.25.3   "/usr/local/bin/entr…"   About a minute ago   Up 54 seconds       0.0.0.0:30080->30080/tcp, 0.0.0.0:30443->30443/tcp, 0.0.0.0:30942->30942/tcp, 127.0.0.1:36853->6443/tcp   k8ssandra-0-control-plane
7a98b85eeb26   kindest/node:v1.25.3   "/usr/local/bin/entr…"   About a minute ago   Up 54 seconds                                                                                                                 k8ssandra-0-worker
d9fbbb80fcbb   registry:2             "/entrypoint.sh /etc…"   About a minute ago   Up About a minute   0.0.0.0:5000->5000/tcp

As far as I understand, the interested port of this single node is 30080

So I tried to put in the environment variables file this port:

janusgraph-env.txt :

janusgraph.storage.backend=cql
janusgraph.storage.hostname=localhost:30080
janusgraph.cluster.max-partitions=32

With localhost as hostname, it doesn't work:

Error connecting to Node(endPoint=localhost/127.0.0.1:30080

I tried with janusgraph-default as hostname and it doesn't work either:

Ignoring invalid contact point janusgraph-default:30080 (unknown host janusgraph-default)

In /etc/resolv.conf I've found :

nameserver 127.0.0.53
options edns0 trust-ad
search invalid

So I tried with 127.0.0.53 as hostname:

janusgraph.storage.backend=cql
janusgraph.storage.hostname=127.0.0.53:30080
janusgraph.cluster.max-partitions=32

but, again, it doesn't work: Error connecting to Node(endPoint=/127.0.0.53:30080

I don't understand what you mean as "DNS name that is available in Docker which directly returns the IP address of the Cassandra containers"

root@vmi1231861:~# docker network ls
NETWORK ID     NAME      DRIVER    SCOPE
51f44a821b43   bridge    bridge    local
edf5a0415dfc   host      host      local
5595be8d6371   kind      bridge    local
af680df02a81   none      null      local
root@vmi1231861:~# 
root@vmi1231861:~# docker ps -a
CONTAINER ID   IMAGE                  COMMAND                  CREATED          STATUS          PORTS                                                                                                     NAMES
b9dbdebe5e87   kindest/node:v1.25.3   "/usr/local/bin/entr…"   59 minutes ago   Up 59 minutes   0.0.0.0:30080->30080/tcp, 0.0.0.0:30443->30443/tcp, 0.0.0.0:30942->30942/tcp, 127.0.0.1:36853->6443/tcp   k8ssandra-0-control-plane
7a98b85eeb26   kindest/node:v1.25.3   "/usr/local/bin/entr…"   59 minutes ago   Up 59 minutes                                                                                                             k8ssandra-0-worker
d9fbbb80fcbb   registry:2             "/entrypoint.sh /etc…"   59 minutes ago   Up 59 minutes   0.0.0.0:5000->5000/tcp                                                                                    kind-registry

FlorianHockmann Mar 9, 2023
Maintainer

janusgraph.storage.hostname=localhost:30080

That won't work because this config option really only expects a hostname, not a combination of hostname and port.
You can use janusgraph.storage.port to specify the port.

So I tried with 127.0.0.53 as hostname:

Not sure why you think that 127.0.0.53 is the hostname for your Cassandra container. This is simply the IP address for DNS which is also why you've found it as the nameserver in your resolv.conf.

I don't understand what you mean as "DNS name that is available in Docker which directly returns the IP address of the Cassandra containers"

The name of the Cassandra container should work for example.

In general, my advise is that you don't start directly with Kubernetes if you're new to JanusGraph, Cassandra, AND Docker networking in general. Kubernetes brings even more complexity to this setup.
I would just try to get up a simple JanusGraph container first, without anything else, so no Cassandra and no Kubernetes. Just use the default config and try to connect to JanusGraph Server from outside the container. When you have that running, than you can as a next step start a Cassandra container and try to configure JanusGraph to use that as its backend. The next step can be to add Solr or to move the two containers into Kubernetes.
But I would really only make the setup more complex when you have the simpler version running and a good understanding of it.

raphael10-collab Mar 9, 2023
Author

Yes. I totally agree. I wipe everything out, start from scratch again.

I've found also this docker's guide on how to create a simple multi-machine Cassandra cluster: https://hub.docker.com/_/cassandra/

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