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Pre-requisites

1. Ensure you have the syndeia-cloud-3.56_janusgraph_setup.zip (or latest service pack) downloaded to your home directory (or home directory's Downloads folder) from the download/license instructions sent out by our team.

Note: the .ZIP will pre-create a separate folder for its contents when extracted so there is no need to pre-create a separate folder for it.

2. Ensure you satisfy Janusgraph's pre-requisites, ie: have (Open|Oracle)JDK/JRE + Apache Cassandra (& optionally Elasticsearch) installed. Re. CPU, memory, HD space, etc. this will depend on how much data you expect to store, query, and graph.

3. If using a firewall, and JG will be on a separate server from SC, ensure the following port is accessible (consult your local network admin if required): TCP port 8182 (this is the port to listen to for client connections).

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Downloading & Extracting JanusGraph

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3. Unzip Syndeia Cloud's JanusGraph setup package in your home directory ~/, ie: unzip syndeia-cloud-3.56_janusgraph_setup.zip -d ~/

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6. In a new terminal session, cd into the bin dir and run the Syndeia Cloud JanusGraph setup script, ie: cd ~/syndeia-cloud-3.56_janusgraph_setup/bin; ./syndeia-cloud-3.56_janusgraph_setup.bash.

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Note, If you are deploying JG on a multi-node configuration where JG is not on the same machine as Cassandra, please:

ensure you have CQLSH installed,
run this setup with the --multi_node or -m switch.

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This will:

- Create/update janusgraph-current symlink to specified version, default = 0.5.3
- Create a new syndeia_admin superuser in Cassandra with a password you specify
- Create a new syndeia_cloud_graph and syndeia_cloud_graph_config keyspaces
- GRANT ALL PERMISSIONS ON KEYSPACE syndeia_cloud_graph TO syndeia_admin
- GRANT ALL PERMISSIONS ON KEYSPACE syndeia_cloud_graph_config TO syndeia_admin
- Run a Groovy JanusGraph setup script to set storage params for your graph and build indexes
- Create a renamed copy of the file /opt/janusgraph-<release_ver>/conf/janusgraph-cql-configurationgraph.properties as janusgraph-cql-configurationgraph-syndeia.properties with:

graph.graphname=syndeia_cloud_graph_configAdd storage.username=syndeia_adminAdd storage.password=<password_specified>
storage.hostname=<your_Cassandra_host>

- If you installed Elasticsearch on the same machine, add index.search.backend=elasticsearch and index.search.hostname=localhost to use Elasticsearch for search indexing
- Create a renamed copy of the file /opt/janusgraph-<release_ver>/conf/gremlin-server/gremlin-server-configuration.yaml as gremlin-server-configuration-syndeia.yaml and set ConfigurationManagementGraph to point to janusgraph-cql-configurationgraph-syndeia.properties.
- Install systemd .service file for JanusGraph service
- Start JanusGraph service

Note: you may be prompted for sudo authentication. You will also be prompted for your cassandra account password (default = cassandra), to set your syndeia_admin password and the FQDN of your Cassandra host.

Avoid all of the following special characters: \?*[]+#&.{}$ when setting your syndeia_admin password.

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When completed, confirm all of the following are true before proceeding or when trying to determine if the JanusGraph service is properly configured and operating.

(The tools used and the network locations used are site-dependent.)

SC's .groovy script for JG ran successfully, ie: you should have only received a WARN org.apache.hadoop.util.NativeCodeLoader - Unable to load native-hadoop library for your platform... using builtin-java classes where applicable WARN-ing
JanusGraph service is now running: systemctl status janusgraph
JanusGraph port is accessible: netstat -tulpn | grep 8182
Cassandra syndeia_cloud_graph and syndeia_cloud_graph_config keyspaces exist, ie: if you type SELECT * FROM syndeia_cloud_ in CQLSH and hit tab, you should see syndeia_cloud_graph. syndeia_cloud_graph_config.

Following files exist as described below:

/opt/janusgraph-current symlink exists, and points to the latest Intercax-approved version of JanusGraph

/opt/janusgraph-current/conf/gremlin-server/gremlin-server-configuration-syndeia.yaml exists.

When completed with the defaults, the beginning of the file should resemble this content:

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title	sample: gremlin-server-configuration-syndeia.yaml
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host: localhost
port: 8182
scriptEvaluationTimeout: 60000
channelizer: org.janusgraph.channelizers.JanusGraphWebSocketChannelizer
graphManager: org.janusgraph.graphdb.management.JanusGraphManager
graphs: {
  ConfigurationManagementGraph: conf/janusgraph-cql-configurationgraph-syndeia.properties
}
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janusgraph-cql-configurationgraph-syndeia.properties'
- storage.hostname entry should be set to the hostname/IP address for the Cassandra host
/opt/janusgraph-current/conf/gremlin-server/gremlin-server-configuration-syndeia.yaml exists
/opt/janusgraph-current/log/gremlin-server.log exists

A message similar to INFO org.apache.tinkerpop.gremlin.server.GremlinServer - Channel started at port 8182. appears near the recent end of the gremlin-server.log file

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9. To view the logs for JanusGraph, use sudo journalctl -eu janusgraph & less /opt/janusgraph-0.5.3-full/log/gremlin-server.log. To follow the log files, you can use sudo journalctl -feu janusgraph & tail -f /opt/janusgraph-0.5.3-full/log/gremlin-server.log. You should see output similar to the following (abridged) text:

Note, for your convenience you may wish to create a symlink to /opt/janusgraph-0.5.3-full/log/ from /var/log, ie: sudo ln -nfs /opt/janusgraph-0.5.3-full/log/ /var/log/janusgraph

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18. Three things need to occur: you will need to change the Snitch (if not already done for Cassandra), alter the keyspace Replication Factor (RF), and run nodetool repair on each node (see https://docs.datastax.com/en/archived/cassandra/3.x/cassandra/operations/opsChangeKSStrategy.html for a summary of the process).

Change the Snitch: see "Switching Snitches": https://docs.datastax.com/en/archived/cassandra/3.x/cassandra/operations/opsChangeKSStrategy.html

Alter the RF: verify the Cassandra “datacenter” name (default = dc1) from the CLI by running nodetool status and then from Cassandra CQLSH increment the RF for your JanusGraph keyspace(s):

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ALTER KEYSPACE syndeia_cloud_auth WITH REPLICATION = { 'class' : 'NetworkTopologyStrategy', '<datacenter_name>' : <total_number_of_nodes> };
-- where <datacenter_name> = the name of the datacenter as shown via nodetool status, and <total_number_of_nodes> = total # of nodes (in the cluster)
ALTER KEYSPACE syndeia_cloud_store WITH REPLICATION = { 'class' : 'NetworkTopologyStrategy', '<datacenter_name>' : <total_number_of_nodes> };
-- where <datacenter_name> = the name of the datacenter as shown via nodetool status, and <total_number_of_nodes> = total # of nodes (in the cluster)
ALTER KEYSPACE syndeia_cloud_confluence WITH REPLICATION = { 'class' : 'NetworkTopologyStrategy', '<datacenter_name>' : <total_number_of_nodes> };
-- where <datacenter_name> = the name of the datacenter as shown via nodetool status, and <total_number_of_nodes> = total # of nodes (in the cluster)
ALTER KEYSPACE syndeia_cloud_graph WITH REPLICATION = { 'class' : 'NetworkTopologyStrategy', '<datacenter_name>' : <total_number_of_nodes> };
-- where <datacenter_name> = the name of the datacenter as shown via nodetool status, and <total_number_of_nodes> = total # of nodes (in the cluster)
ALTER KEYSPACE syndeia_cloud_graph_config WITH REPLICATION = { 'class' : 'NetworkTopologyStrategy', '<datacenter_name>' : <total_number_of_nodes> };
-- where <datacenter_name> = the name of the datacenter as shown via nodetool status, and <total_number_of_nodes> = total # of nodes (in the cluster)

Run nodetool repair: Run nodetool repair --full <keyspace_name> on each node (for more details see https://docs.datastax.com/en/dse/5.1/cql/cql/cql_using/cqlUpdateKeyspaceRF.html)

19. Follow "Things to Consider in a Multi-Node JanusGraph Cluster" https://docs.janusgraph.org/0.3.1/things-to-consider-in-a-multi-node-janusgraph-cluster.html

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Code Block

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:remote connect tinkerpop.server conf/remote.yaml session
:remote console
graph = ConfiguredGraphFactory.open('syndeia_cloud_graph');
// should return: ==>standardjanusgraph[cql:[cassandra.mydomain.com]]
g = graph.traversal();
g.V();
g.E();

The last 2 commands above should not return any results since the graph (syndeia_cloud_graph) is empty - no vertices or edges.

21.4. Type :quit

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Versions Compared

Old Version 2

New Version 3

Key

Pre-requisites

Downloading & Extracting JanusGraph