Add plugins using a plugins volume on kubernetes

[ozmoze]

• Neo4j version: 5.26.0

When trying to install graph data-science plugin in our neo4j kubernetes instance using neo4j-5.26.0 helm chart, we hit a bug where the symbolic link is not properly set for plugins folder.

• plugin volume definition in helm chart

volumes:
  plugins:
    labels: {}
    disableSubPathExpr: false
    mode: "share"
    share:
      name: "data"

• resulting volume in kubernetes neo4j pod

We can see that there is no symbolic link for plugins pointing to /plugins mounted directory.
Instead there is a empty plugins directory under neo4j home.

neo4j@neo4j-voyager-0:~$ ls -l
total 240
-rwxrwxrwx 1 neo4j neo4j  36008 Dec  5 12:07 LICENSE.txt
-rwxrwxrwx 1 neo4j neo4j 118877 Dec  5 12:07 LICENSES.txt
-rwxrwxrwx 1 neo4j neo4j  11647 Dec  5 12:07 NOTICE.txt
-rwxrwxrwx 1 neo4j neo4j   1432 Dec  5 12:07 README.txt
-rwxrwxrwx 1 neo4j neo4j     94 Dec  5 12:07 UPGRADE.txt
drwxr-xr-x 3 neo4j neo4j   4096 Dec 24 22:27 bin
drwxrwxrwx 2 neo4j neo4j   4096 Dec  5 12:07 certificates
drwxrwxrwx 1 neo4j neo4j   4096 Dec 27 14:04 conf
lrwxrwxrwx 1 root  root       5 Dec 24 22:27 data -> /data
drwxrwxrwx 2 neo4j neo4j   4096 Dec  5 12:07 import
drwxrwxrwx 2 neo4j neo4j   4096 Dec  6 10:04 labs
drwxrwxrwx 3 neo4j neo4j  20480 Dec  6 10:04 lib
drwxrwxrwx 2 neo4j neo4j   4096 Dec  5 12:07 licenses
lrwxrwxrwx 1 root  root       5 Dec 24 22:27 logs -> /logs
-rwxrwxrwx 1 neo4j neo4j     64 Dec 24 22:27 packaging_info
drwxrwxrwx 1 neo4j neo4j   4096 Dec 27 14:09 plugins
drwxrwxrwx 2 neo4j neo4j   4096 Dec  6 10:04 products
drwxrwxrwx 1 neo4j neo4j   4096 Dec 27 14:05 run
neo4j@neo4j-voyager-0:~$

Our GDS jar file is under /plugins

neo4j@neo4j-voyager-0:~$ ls -l /plugins/
total 62440
-rw-r--r-- 1 neo4j neo4j 63936757 Dec 27 13:57 neo4j-graph-data-science-2.13.2.jar
neo4j@neo4j-voyager-0:~$ 

[jennyowen]

@ozmoze Only the /data and /logs directories will have a simlink under /var/lib/neo4j. Other mounted directories, including /plugins are connected to neo4j by setting the server.directories.plugins setting in the neo4j.conf to /plugins.

Are you finding that the GDS plugin is correctly loaded?

Does your bug about a missing symbolic link have an error message?