To create a minikube cluster

To install minikube I followed See these instructions. Therefore you need to:

curl -LO https://storage.googleapis.com/minikube/releases/latest/minikube-linux-amd64

sudo install minikube-linux-amd64 /usr/local/bin/minikube

minikube start

The startup will take a short time.

To create the namespace

kubectl apply -f minikube/minikube-namespace.yaml

Check with

kubectl get namespaces

To create the persistent volume

kubectl apply -f minikube/minikube-persistentVolume.yaml

Check with

kubectl get pv

To create the persistent volume claims

kubectl apply -f minikube/minikube-persistentVolumeClaim.yaml

Check with

kubectl get pvc --namespace neo4j-namespace

Deploy neo4j version 4

kubectl apply -f neo4j/neo4j4-deployment.yaml 

Check with

kubectl --namespace neo4j-namespace get all

This may take a while. To debug the startup of the database pod:

kubectl --namespace neo4j-namespace logs neo4j-database-0

or

kubectl --namespace neo4j-namespace describe pod neo4j-database-0

Create some data in the database

Use the default login for neo4j version 4 (neo4j:neo4j). Open up the files NodeCreation.cypher and Relationship.cypher and copy/paste the statements to the webfrontend and executed it there.

To figure out what is the URL to access the webfront end use

minikube --namespace neo4j-namespace service neo4j-service –url

To export the data using graphml

Run this Cypher-statement in the neo4j-Webfrontend

WITH "export-neo4j4.graphml" AS filename
CALL apoc.export.graphml.all(filename, {useTypes:TRUE, storeNodeIds:FALSE})
YIELD file
RETURN file;

after that export the saved data to your file system.

Delete the neo4j version 4

Removing statefulset
kubectl --namespace neo4j-namespace delete statefulsets.apps neo4j-database
removing service
kubectl --namespace neo4j-namespace delete service neo4j-service
check if deleted
kubectl --namespace neo4j-namespace get all

Create secret for neo4j version 5

kubectl apply -f neo4j5-on-kubernetes/neo4j/neo4j-secret.yaml

Create neo4j version 5 database

kubectl apply -f neo4j5-on-kubernetes/neo4j/neo4j5-deployment.yaml 

Import the graphml data

Using this Cypher-statement

CALL apoc.import.graphml("export-neo4j4.graphml", {readLabels: true})

Deploy neo4j version 5 to the neo4j-backup namespace

kubectl apply -f neo4j5-on-kubernetes/backup/neo4j5-secret-backup.yaml
kubectl apply -f neo4j5-on-kubernetes/backup/neo4j5-deployment-backup.yaml

Check the connection to the HTTP API

by placing this curl statement into your terminal

curl -X POST http://192.168.49.2:30047/db/neo4j/tx/commit -H "Content-Type:application/json" -d "{\"statements\":[{\"statement\":\"match (n) return count(n)\"}]}" -H "Authorization: bmVvNGo6MTIzNDU2Nzg="

use this similar statement into your Cronjob

curl -d '{"statements": [ {  "statement" : "WITH \"backup.graphml\" AS filename CALL apoc.export.graphml.all(filename, {useTypes:TRUE, storeNodeIds:FALSE}) YIELD file RETURN file;" } ]}' -H "Authorization: Basic bmVvNGo6MTIzNDU2Nzg=" -H "Content-Type: application/json" -X POST http://192.168.49.2:30047/db/neo4j/tx/commit

Deploy the Cronjob

kubectl apply -f neo4j5-on-kubernetes/backup/neo4j5-backup-job.yaml

Derive a job from the Cronjob for immediate execution

kubectl --namespace neo4j-backup create job --from=cronjob/neo4j-backup neo4j-backup-once

Check for the availability of the created backup file

by accessing the database backend and navigating to the import folder

kubectl --namespace neo4j-backup exec -it neo4j-database-0  -- /bin/sh

To reset anything you did and start from scratch

minikube delete