Titan to JanusGraph Migration

Instructions for K8s set up

1. Create a directory in k8s set up where you want to execute titan to janus graph migration.

   e.g. /data/migration

2.  Download JanusGraph gremlin in-built package from URL at /data/migration. https://github.com/JanusGraph/janusgraph/releases/download/v0.3.1/janusgraph-0.3.1-hadoop2.zip
3.  Copy "TitanToJanusGraphMigration.groovy" script to /data/migration. Script location is : \asdctool\src\main\java\org\openecomp\sdc\asdctool\impl. Also attached script. 
   
   

4.  Copy "titan.properties" from SDC-BE pod to /data/migration

   kubectl cp sdc/sdc-sdc-be-5fb5657f9c-brw46:/var/lib/jetty/config/catalog-be/titan.properties /data/migration

5. Add below field to "titan.properties"

   graph.allow-upgrade=true

6. Take backup of entire sdc keyspaces in cassandra.
7. All users should be blocked from using system

8. Copy "janusgraph-0.3.1-hadoop2.zip" , "TitanToJanusGraphMigration.groovy" , "titan.properties" to cassandra pod.

   e.g. kubectl cp /data/migration/ sdc/sdc-sdc-cs-5c8b5c888d-gt446:/root

9. Enter inside the cassandra pod

   e.g.  kubectl -n sdc exec -it sdc-sdc-cs-5c8b5c888d-gt446 bash

10. Execute migration script 
         Navigate to /root and unzip"janusgraph-0.3.1-hadoop2.zip" . 
         Navigate to bin folder and run below command.
         Command : ./gremlin.sh -l <LOG_LEVEL> -e <Path_To_migration_Script_File> <Path_To_Properties_File>

    e.g.  ./gremlin.sh -l ERROR -e /root/TitanToJanusGraphMigration.groovy /root/titan.properties

11. Upgrade SDC-BE, SDC-FE pods with images which includes changes of JanusGraph. 

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Instructions for docker environment

1. Create a directory in docker environment where you want to execute titan to janus graph migration.

   e.g. /data/migration

2. Download JanusGraph gremlin in-built package from URL at /data/migration and unzip it.    https://github.com/JanusGraph/janusgraph/releases/download/v0.3.1/janusgraph-0.3.1-hadoop2.zip

3. Copy "TitanToJanusGraphMigration.groovy" script to /data/migration. Script location is : \asdctool\src\main\java\org\openecomp\sdc\asdctool\impl. Also attached script. 
   
   
   
   

4. Copy "titan.properties" from SDC-BE docker to /data/migration

   e.g. docker cp sdc-BE:/var/lib/jetty/config/catalog-be/titan.properties /data/migration

5.  Add below field to "titan.properties"

   graph.allow-upgrade=true

6. Take backup of entire sdc keyspaces in cassandra.

7. Stop and remove SDC-BE , SDC-FE dockers.

8. Execute migration script 
      Navigate to "janusgraph-0.3.1-hadoop2/bin" folder and run below command.
      Command : ./gremlin.sh -l <LOG_LEVEL> -e <Path_To_migration_Script_File> <Path_To_Properties_File>

   e.g. ./gremlin.sh -l ERROR -e /data/migration/TitanToJanusGraphMigration.groovy /data/migration/titan.properties

9. Start SDC-BE, SDC-FE dockers with images which includes changes of JanusGraph.