Table of contents
Open Table of contents
I came across an interesting article on London Tube system analysis with Neo4j, utilizing the Graph algorithms plugin. This is how I set up Neo4j Docker instance for the journey.
- Recent macOS, Windows or Linux laptop should all work. At the time of writing I am running
macOS Sierra 10.12.6.
- You have the Docker Community Edition running. At the time of writing I am running
Version 17.06.2-ce-mac27 (19124).
Prepare host machine
We are going to store the data to host among other things. To accomplish this, we need to create few directories under our work dir (whichever you like it to be):
mkdir data mkdir logs mkdir conf mkdir plugins
Get the initial config
We will need to add new parameter to
neo4j.conf, so first we need to get our hands on the file as it is now. Luckily we can dump it from the container:
docker run --rm \ --volume=$(pwd)/conf:/conf \ neo4j:3.2.3 dump-config
… which will “download” the configuration file to conf directory under current host directory.
Download the plugin
In order to use the Graph Algorithm, we need to download it from GitHub under releases. At the time of writing, the file in question is
Store it in
Since we are using Neo4j version 3.2.x, we need to add a line to the conf. From the repo’s
README copy the line
dbms.security.procedures.unrestricted=algo.* and add it to the
Run the container
Now that all prerequisites are in order, it’s time to run the container. With the options set as below:
- the container is run as daemon,
- no authentication is required (we could set/require it by using
- data will be stored in
- logs will be written to
- conf will be used from
- plugins will be included and run from
docker run -d \ --publish=7474:7474 \ --publish=7687:7687 \ --volume=$(pwd)/data:/data \ --volume=$(pwd)/logs:/logs \ --volume=$(pwd)/conf:/conf \ --volume=$(pwd)/plugins:/plugins \ --env=NEO4J_AUTH=none \ --name my_neo4j neo4j:3.2.3
So, with the container running — we can check the status with
docker ps -a — it’s time to open a web browser and head to http://localhost:7474/browser/. Should all have gone well, we should see Neo4j’s web GUI.
We can verify that the plugin have loaded correctly by querying
CALL dbms.procedures() YIELD name, description, signature WHERE name STARTS WITH "algo." RETURN name, description, signature ORDER BY name
… which should list the algorithm procedures.
Follow the original article
Now that we have Neo4j up and running — with plugins — it’s time to follow the aforementioned article and analyze the London Tube data.