Document authentication

[rrmerugu]

I'm attempting to add basic authentication to the websocket channel. I tried following the docs from https://docs.janusgraph.org/basics/server/#http-basic-authentication and added the authentication config in gremlin-server.yaml. I used my own config files in a folder conf and tried to run docker-compose up. Its failing with the error "Gremlin Server was unable to start and will now begin shutdown: Could not create/configure Authenticator null error"

What am I doing wrong here ?

// docker-compose.yml
# Copyright 2019 JanusGraph Authors
#
# 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.

version: "3"

services:
  janusgraph:
    image: janusgraph/janusgraph:latest
    container_name: jce-janusgraph
    ports:
      - "8182:8182"
    networks:
      - jce-network
    volumes:
      # bind mounts for configs; use read only so not overridden by environment variables
      - "./conf:/etc/opt/janusgraph/:ro"
    healthcheck:
      test: ["CMD", "bin/gremlin.sh", "-e", "scripts/remote-connect.groovy"]
      interval: 10s
      timeout: 30s
      retries: 3
  cassandra:
    image: cassandra:3
    container_name: jce-cassandra
    ports:
      - "9042:9042"
      - "9160:9160"
    networks:
      - jce-network
  elasticsearch:
    image: docker.elastic.co/elasticsearch/elasticsearch:6.6.0
    container_name: jce-elastic
    environment:
      - "ES_JAVA_OPTS=-Xms512m -Xmx512m"
      - "http.host=0.0.0.0"
      - "network.host=0.0.0.0"
      - "transport.host=127.0.0.1"
      - "cluster.name=docker-cluster"
      - "xpack.security.enabled=false"
      - "discovery.zen.minimum_master_nodes=1"
    ports:
      - "9200:9200"
    networks:
      - jce-network

networks:
  jce-network:
volumes:
  janusgraph-default-data:

// conf/gremlin-server.yaml
# Copyright 2019 JanusGraph Authors
#
# 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.

host: 0.0.0.0
port: 8182
scriptEvaluationTimeout: 30000
channelizer: org.apache.tinkerpop.gremlin.server.channel.WebSocketChannelizer
graphs: {
  graph: /etc/opt/janusgraph/janusgraph.properties
}
scriptEngines: {
  gremlin-groovy: {
    plugins: { org.janusgraph.graphdb.tinkerpop.plugin.JanusGraphGremlinPlugin: {},
               org.apache.tinkerpop.gremlin.server.jsr223.GremlinServerGremlinPlugin: {},
               org.apache.tinkerpop.gremlin.tinkergraph.jsr223.TinkerGraphGremlinPlugin: {},
               org.apache.tinkerpop.gremlin.jsr223.ImportGremlinPlugin: {classImports: [java.lang.Math], methodImports: [java.lang.Math#*]},
               org.apache.tinkerpop.gremlin.jsr223.ScriptFileGremlinPlugin: {files: [scripts/empty-sample.groovy]}}}}
serializers:
  - { className: org.apache.tinkerpop.gremlin.driver.ser.GryoMessageSerializerV3d0, config: { ioRegistries: [org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistry] }}
  - { className: org.apache.tinkerpop.gremlin.driver.ser.GryoMessageSerializerV3d0, config: { serializeResultToString: true }}
  - { className: org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerV3d0, config: { ioRegistries: [org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistry] }}
  # Older serialization versions for backwards compatibility:
  - { className: org.apache.tinkerpop.gremlin.driver.ser.GryoMessageSerializerV1d0, config: { ioRegistries: [org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistry] }}
  - { className: org.apache.tinkerpop.gremlin.driver.ser.GryoLiteMessageSerializerV1d0, config: {ioRegistries: [org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistry] }}
  - { className: org.apache.tinkerpop.gremlin.driver.ser.GryoMessageSerializerV1d0, config: { serializeResultToString: true }}
  - { className: org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerGremlinV2d0, config: { ioRegistries: [org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistry] }}
  - { className: org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerGremlinV1d0, config: { ioRegistries: [org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistryV1d0] }}
  - { className: org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerV1d0, config: { ioRegistries: [org.janusgraph.graphdb.tinkerpop.JanusGraphIoRegistryV1d0] }}
processors:
  - { className: org.apache.tinkerpop.gremlin.server.op.session.SessionOpProcessor, config: { sessionTimeout: 28800000 }}
  - { className: org.apache.tinkerpop.gremlin.server.op.traversal.TraversalOpProcessor, config: { cacheExpirationTime: 600000, cacheMaxSize: 1000 }}
metrics: {
  consoleReporter: {enabled: true, interval: 180000},
  csvReporter: {enabled: true, interval: 180000, fileName: /tmp/gremlin-server-metrics.csv},
  jmxReporter: {enabled: true},
  slf4jReporter: {enabled: true, interval: 180000},
  gangliaReporter: {enabled: false, interval: 180000, addressingMode: MULTICAST},
  graphiteReporter: {enabled: false, interval: 180000}}
maxInitialLineLength: 4096
maxHeaderSize: 8192
maxChunkSize: 8192
maxContentLength: 65536
maxAccumulationBufferComponents: 1024
resultIterationBatchSize: 64
writeBufferLowWaterMark: 32768
writeBufferHighWaterMark: 65536

threadPoolWorker: 1
gremlinPool: 8

authentication: { <<< this is what i added to the default template
   authenticator: org.janusgraph.graphdb.tinkerpop.gremlin.server.auth.JanusGraphSimpleAuthenticator,
   authenticationHandler: org.apache.tinkerpop.gremlin.server.handler.HttpBasicAuthenticationHandler,
   config: {
     defaultUsername: user,
     defaultPassword: password,
     credentialsDb: /etc/opt/janusgraph/janusgraph-credentials-server.properties
    }
 }

// conf/janusgraph.properties
gremlin.graph=org.janusgraph.core.JanusGraphFactory
storage.backend=cql
storage.hostname=jce-cassandra
cache.db-cache = true
cache.db-cache-clean-wait = 20
cache.db-cache-time = 180000
cache.db-cache-size = 0.25
index.search.backend=elasticsearch
index.search.hostname=jce-elastic
index.search.elasticsearch.client-only=true
storage.directory=/var/lib/janusgraph/data
index.search.directory=/var/lib/janusgraph/index

// conf/janusgraph-credentials-server.properties
username:user
password:password

Here is the response tail of docker-compose up.

jce-janusgraph   | 1    [main] INFO  org.apache.tinkerpop.gremlin.server.GremlinServer  - 3.4.6
jce-janusgraph   |          \,,,/
jce-janusgraph   |          (o o)
jce-janusgraph   | -----oOOo-(3)-oOOo-----
jce-janusgraph   | 
jce-janusgraph   | 76   [main] INFO  org.apache.tinkerpop.gremlin.server.GremlinServer  - Configuring Gremlin Server from /etc/opt/janusgraph/gremlin-server.yaml
jce-janusgraph   | 135  [main] INFO  org.apache.tinkerpop.gremlin.server.util.MetricManager  - Configured Metrics ConsoleReporter configured with report interval=180000ms
jce-janusgraph   | 137  [main] INFO  org.apache.tinkerpop.gremlin.server.util.MetricManager  - Configured Metrics CsvReporter configured with report interval=180000ms to fileName=/tmp/gremlin-server-metrics.csv
jce-janusgraph   | 173  [main] INFO  org.apache.tinkerpop.gremlin.server.util.MetricManager  - Configured Metrics JmxReporter configured with domain= and agentId=
jce-janusgraph   | 174  [main] INFO  org.apache.tinkerpop.gremlin.server.util.MetricManager  - Configured Metrics Slf4jReporter configured with interval=180000ms and loggerName=org.apache.tinkerpop.gremlin.server.Settings$Slf4jReporterMetrics
jce-janusgraph   | 462  [main] INFO  com.datastax.driver.core  - DataStax Java driver 3.9.0 for Apache Cassandra
jce-janusgraph   | 475  [main] INFO  com.datastax.driver.core.GuavaCompatibility  - Detected Guava < 19 in the classpath, using legacy compatibility layer
jce-janusgraph   | 591  [main] INFO  com.datastax.driver.core.ClockFactory  - Using native clock to generate timestamps.
jce-janusgraph   | 661  [main] INFO  com.datastax.driver.core.NettyUtil  - Found Netty's native epoll transport in the classpath, using it
jce-janusgraph   | 890  [main] INFO  com.datastax.driver.core.policies.DCAwareRoundRobinPolicy  - Using data-center name 'datacenter1' for DCAwareRoundRobinPolicy (if this is incorrect, please provide the correct datacenter name with DCAwareRoundRobinPolicy constructor)
jce-janusgraph   | 890  [main] INFO  com.datastax.driver.core.Cluster  - New Cassandra host jce-cassandra/172.18.0.4:9042 added
jce-janusgraph   | 1020 [main] INFO  org.janusgraph.core.util.ReflectiveConfigOptionLoader  - Loaded and initialized config classes: 13 OK out of 13 attempts in PT0.034S
jce-janusgraph   | 3081 [main] INFO  org.janusgraph.graphdb.idmanagement.UniqueInstanceIdRetriever  - Generated unique-instance-id=ac120003460-8e2964850e221
jce-janusgraph   | 3085 [main] INFO  com.datastax.driver.core.ClockFactory  - Using native clock to generate timestamps.
jce-janusgraph   | 3131 [main] INFO  com.datastax.driver.core.policies.DCAwareRoundRobinPolicy  - Using data-center name 'datacenter1' for DCAwareRoundRobinPolicy (if this is incorrect, please provide the correct datacenter name with DCAwareRoundRobinPolicy constructor)
jce-janusgraph   | 3131 [main] INFO  com.datastax.driver.core.Cluster  - New Cassandra host jce-cassandra/172.18.0.4:9042 added
jce-janusgraph   | 3154 [main] INFO  org.janusgraph.diskstorage.Backend  - Configuring index [search]
jce-janusgraph   | 3436 [main] INFO  org.janusgraph.diskstorage.Backend  - Initiated backend operations thread pool of size 24
jce-janusgraph   | 3480 [main] INFO  org.janusgraph.diskstorage.Backend  - Configuring total store cache size: 112424774
jce-janusgraph   | 3571 [main] INFO  org.janusgraph.diskstorage.log.kcvs.KCVSLog  - Loaded unidentified ReadMarker start time 2020-07-17T18:37:39.866Z into org.janusgraph.diskstorage.log.kcvs.KCVSLog$MessagePuller@3e6534e7
jce-janusgraph   | 3572 [main] INFO  org.apache.tinkerpop.gremlin.server.GremlinServer  - Graph [graph] was successfully configured via [/etc/opt/janusgraph/janusgraph.properties].
jce-janusgraph   | 3572 [main] INFO  org.apache.tinkerpop.gremlin.server.util.ServerGremlinExecutor  - Initialized Gremlin thread pool.  Threads in pool named with pattern gremlin-*
jce-janusgraph   | 3600 [main] INFO  org.apache.tinkerpop.gremlin.server.util.ServerGremlinExecutor  - Initialized GremlinExecutor and preparing GremlinScriptEngines instances.
jce-janusgraph   | 5874 [main] INFO  org.apache.tinkerpop.gremlin.server.util.ServerGremlinExecutor  - Initialized gremlin-groovy GremlinScriptEngine and registered metrics
jce-janusgraph   | 5878 [main] INFO  org.apache.tinkerpop.gremlin.server.util.ServerGremlinExecutor  - A GraphTraversalSource is now bound to [g] with graphtraversalsource[standardjanusgraph[cql:[jce-cassandra]], standard]
jce-janusgraph   | 5884 [main] INFO  org.apache.tinkerpop.gremlin.server.op.OpLoader  - Adding the standard OpProcessor.
jce-janusgraph   | 5886 [main] INFO  org.apache.tinkerpop.gremlin.server.op.OpLoader  - Adding the session OpProcessor.
jce-janusgraph   | 5943 [main] INFO  org.apache.tinkerpop.gremlin.server.op.OpLoader  - Adding the traversal OpProcessor.
jce-janusgraph   | 5949 [main] INFO  org.apache.tinkerpop.gremlin.server.op.traversal.TraversalOpProcessor  - Initialized cache for TraversalOpProcessor with size 1000 and expiration time of 600000 ms
jce-janusgraph   | 5950 [main] INFO  org.apache.tinkerpop.gremlin.server.GremlinServer  - Executing start up LifeCycleHook
jce-janusgraph   | 5962 [main] INFO  org.apache.tinkerpop.gremlin.server.GremlinServer  - Executed once at startup of Gremlin Server.
jce-janusgraph   | 5967 [main] INFO  org.apache.tinkerpop.gremlin.server.GremlinServer  - idleConnectionTimeout was set to 0 which resolves to 0 seconds when configuring this value - this feature will be disabled
jce-janusgraph   | 5967 [main] INFO  org.apache.tinkerpop.gremlin.server.GremlinServer  - keepAliveInterval was set to 0 which resolves to 0 seconds when configuring this value - this feature will be disabled
jce-janusgraph   | 5969 [main] WARN  org.apache.tinkerpop.gremlin.server.AbstractChannelizer  - The org.apache.tinkerpop.gremlin.driver.ser.GryoMessageSerializerV3d0 serialization class is deprecated.
jce-janusgraph   | 6008 [main] INFO  org.apache.tinkerpop.gremlin.server.AbstractChannelizer  - Configured application/vnd.gremlin-v3.0+gryo with org.apache.tinkerpop.gremlin.driver.ser.GryoMessageSerializerV3d0
jce-janusgraph   | 6008 [main] WARN  org.apache.tinkerpop.gremlin.server.AbstractChannelizer  - The org.apache.tinkerpop.gremlin.driver.ser.GryoMessageSerializerV3d0 serialization class is deprecated.
jce-janusgraph   | 6008 [main] INFO  org.apache.tinkerpop.gremlin.server.AbstractChannelizer  - Configured application/vnd.gremlin-v3.0+gryo-stringd with org.apache.tinkerpop.gremlin.driver.ser.GryoMessageSerializerV3d0
jce-janusgraph   | 6023 [main] INFO  org.apache.tinkerpop.gremlin.server.AbstractChannelizer  - Configured application/vnd.gremlin-v3.0+json with org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerV3d0
jce-janusgraph   | 6023 [main] INFO  org.apache.tinkerpop.gremlin.server.AbstractChannelizer  - Configured application/json with org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerV3d0
jce-janusgraph   | 6024 [main] WARN  org.apache.tinkerpop.gremlin.server.AbstractChannelizer  - The org.apache.tinkerpop.gremlin.driver.ser.GryoMessageSerializerV1d0 serialization class is deprecated.
jce-janusgraph   | 6025 [main] INFO  org.apache.tinkerpop.gremlin.server.AbstractChannelizer  - Configured application/vnd.gremlin-v1.0+gryo with org.apache.tinkerpop.gremlin.driver.ser.GryoMessageSerializerV1d0
jce-janusgraph   | 6026 [main] WARN  org.apache.tinkerpop.gremlin.server.AbstractChannelizer  - The org.apache.tinkerpop.gremlin.driver.ser.GryoLiteMessageSerializerV1d0 serialization class is deprecated.
jce-janusgraph   | 6027 [main] INFO  org.apache.tinkerpop.gremlin.server.AbstractChannelizer  - Configured application/vnd.gremlin-v1.0+gryo-lite with org.apache.tinkerpop.gremlin.driver.ser.GryoLiteMessageSerializerV1d0
jce-janusgraph   | 6027 [main] WARN  org.apache.tinkerpop.gremlin.server.AbstractChannelizer  - The org.apache.tinkerpop.gremlin.driver.ser.GryoMessageSerializerV1d0 serialization class is deprecated.
jce-janusgraph   | 6027 [main] INFO  org.apache.tinkerpop.gremlin.server.AbstractChannelizer  - Configured application/vnd.gremlin-v1.0+gryo-stringd with org.apache.tinkerpop.gremlin.driver.ser.GryoMessageSerializerV1d0
jce-janusgraph   | 6027 [main] WARN  org.apache.tinkerpop.gremlin.server.AbstractChannelizer  - The org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerGremlinV2d0 serialization class is deprecated.
jce-janusgraph   | 6031 [main] INFO  org.apache.tinkerpop.gremlin.server.AbstractChannelizer  - Configured application/vnd.gremlin-v2.0+json with org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerGremlinV2d0
jce-janusgraph   | 6031 [main] INFO  org.apache.tinkerpop.gremlin.server.AbstractChannelizer  - application/json already has org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerV3d0 configured - it will not be replaced by org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerGremlinV2d0, change order of serialization configuration if this is not desired.
jce-janusgraph   | 6035 [main] INFO  org.apache.tinkerpop.gremlin.server.AbstractChannelizer  - Configured application/vnd.gremlin-v1.0+json with org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerGremlinV1d0
jce-janusgraph   | 6036 [main] INFO  org.apache.tinkerpop.gremlin.server.AbstractChannelizer  - application/json already has org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerV3d0 configured - it will not be replaced by org.apache.tinkerpop.gremlin.driver.ser.GraphSONMessageSerializerV1d0, change order of serialization configuration if this is not desired.
jce-janusgraph   | 6036 [main] INFO  org.janusgraph.graphdb.tinkerpop.gremlin.server.auth.JanusGraphAbstractAuthenticator  - Initializing authentication with the org.janusgraph.graphdb.tinkerpop.gremlin.server.auth.JanusGraphSimpleAuthenticator
jce-janusgraph   | 6037 [main] WARN  org.apache.tinkerpop.gremlin.server.AbstractChannelizer  - Need to set configuration value: root.storage.backend
jce-janusgraph   | 6038 [main] ERROR org.apache.tinkerpop.gremlin.server.GremlinServer  - Gremlin Server Error
jce-janusgraph   | java.lang.IllegalStateException: Could not create/configure Authenticator null
jce-janusgraph   |      at org.apache.tinkerpop.gremlin.server.AbstractChannelizer.createAuthenticator(AbstractChannelizer.java:206)
jce-janusgraph   |      at org.apache.tinkerpop.gremlin.server.AbstractChannelizer.init(AbstractChannelizer.java:152)
jce-janusgraph   |      at org.apache.tinkerpop.gremlin.server.channel.WebSocketChannelizer.init(WebSocketChannelizer.java:62)
jce-janusgraph   |      at org.apache.tinkerpop.gremlin.server.GremlinServer.start(GremlinServer.java:162)
jce-janusgraph   |      at org.apache.tinkerpop.gremlin.server.GremlinServer.main(GremlinServer.java:346)
jce-janusgraph   | Caused by: java.lang.IllegalStateException: Need to set configuration value: root.storage.backend
jce-janusgraph   |      at com.google.common.base.Preconditions.checkState(Preconditions.java:197)
jce-janusgraph   |      at org.janusgraph.diskstorage.configuration.ConfigOption.get(ConfigOption.java:229)
jce-janusgraph   |      at org.janusgraph.diskstorage.configuration.BasicConfiguration.get(BasicConfiguration.java:69)
jce-janusgraph   |      at org.janusgraph.diskstorage.configuration.Configuration.get(Configuration.java:35)
jce-janusgraph   |      at org.janusgraph.diskstorage.Backend.getStorageManager(Backend.java:411)
jce-janusgraph   |      at org.janusgraph.graphdb.configuration.builder.GraphDatabaseConfigurationBuilder.build(GraphDatabaseConfigurationBuilder.java:50)
jce-janusgraph   |      at org.janusgraph.core.JanusGraphFactory.open(JanusGraphFactory.java:161)
jce-janusgraph   |      at org.janusgraph.core.JanusGraphFactory.open(JanusGraphFactory.java:132)
jce-janusgraph   |      at org.janusgraph.core.JanusGraphFactory.open(JanusGraphFactory.java:79)
jce-janusgraph   |      at org.janusgraph.graphdb.tinkerpop.gremlin.server.auth.JanusGraphAbstractAuthenticator.openGraph(JanusGraphAbstractAuthenticator.java:77)
jce-janusgraph   |      at org.janusgraph.graphdb.tinkerpop.gremlin.server.auth.JanusGraphAbstractAuthenticator.setup(JanusGraphAbstractAuthenticator.java:94)
jce-janusgraph   |      at org.janusgraph.graphdb.tinkerpop.gremlin.server.auth.JanusGraphSimpleAuthenticator.setup(JanusGraphSimpleAuthenticator.java:37)
jce-janusgraph   |      at org.apache.tinkerpop.gremlin.server.AbstractChannelizer.createAuthenticator(AbstractChannelizer.java:202)
jce-janusgraph   |      ... 4 more
jce-janusgraph   | 6039 [main] ERROR org.apache.tinkerpop.gremlin.server.GremlinServer  - Gremlin Server was unable to start and will now begin shutdown: Could not create/configure Authenticator null
jce-janusgraph   | 6040 [main] INFO  org.apache.tinkerpop.gremlin.server.GremlinServer  - Shutting down OpProcessor[]
jce-janusgraph   | 6040 [main] INFO  org.apache.tinkerpop.gremlin.server.GremlinServer  - Shutting down OpProcessor[session]
jce-janusgraph   | 6040 [main] INFO  org.apache.tinkerpop.gremlin.server.GremlinServer  - Shutting down OpProcessor[traversal]
jce-janusgraph   | 6040 [main] INFO  org.apache.tinkerpop.gremlin.server.GremlinServer  - Shutting down thread pools.
jce-janusgraph   | 6042 [gremlin-server-stop] INFO  org.apache.tinkerpop.gremlin.server.GremlinServer  - Executing shutdown LifeCycleHook
jce-janusgraph   | 6042 [gremlin-server-stop] INFO  org.apache.tinkerpop.gremlin.server.GremlinServer  - Executed once at shutdown of Gremlin Server.
jce-janusgraph   | 10069 [gremlin-server-stop] INFO  org.apache.tinkerpop.gremlin.server.GremlinServer  - Closed Graph instance [graph]
jce-janusgraph   | 10072 [gremlin-server-stop] INFO  org.apache.tinkerpop.gremlin.server.GremlinServer  - Gremlin Server - shutdown complete

[rrmerugu]

I have pushed the code to https://github.com/rrmerugu/janusgraph-docker-auth-example to make it easy to test.

[rrmerugu]

Never mind, I got it working when i changed conf/janusgraph-credentials-server.properties to

// conf/janusgraph-credentials-server.properties

gremlin.graph=org.janusgraph.core.JanusGraphFactory
storage.backend=cql
storage.hostname=127.0.0.1
storage.cql.keyspace=janusgraph_auth

Example of janusgraph-credentials-server.properties in the documentation might have helped. The documentation in https://docs.janusgraph.org/basics/server/#http-basic-authentication states the following.

In the preceding example, credentialsDb should be different from the graph(s) you are using. It should be configured with the correct backend and a different keyspace, table, or storage directory as appropriate for the configured backend. This graph will be used for storing usernames and passwords.

But it took some time for me to figure out the keys needed for it to work. Can we add example of janusgraph-credentials-server.properties in the documentation ?

[FlorianHockmann]

I changed the title here to make it easier to see that this issue is now only about adding documentation for authentication with the Docker image.