(ISSUE 196) - added neo4j backup cron pod (#281)

* * setting up a pvc to allow for neo4j backups

* * allowing pvc to be turned off
* allowing pvc size to be configurable

* ISSUE 196
* added neo4j plugins
* added chart versions
* removed image pull policy never from metadata service

* * PR comment fix; using the correct maven repo urls

* (ISSUE 196) - added neo4j s3 backup cron pod

* * added missing restartPolicy

* (ISSUE 196)
* updated for PR comments
* using export schema, export graphml functions

amundsen-kube-helm/templates/helm/neo4j/Chart.yaml

 name: neo4j
 home: https://www.neo4j.com
 appVersion: 3.3.0
-version: 0.1.0
+version: 0.2.0
\ No newline at end of file

amundsen-kube-helm/templates/helm/neo4j/templates/neo4j-s3-backup.yaml

+{{ if and (and .Values.neo4j.backup.enabled (eq .Values.provider "aws")) (or (kindIs "invalid" .Values.neo4jpvc) .Values.neo4jpvc) }}
+apiVersion: batch/v1beta1
+kind: CronJob
+metadata:
+    name: neo4j-s3-backup
+spec:
+    schedule: {{ .Values.neo4j.backup.schedule }}
+    jobTemplate:
+        spec:
+            template:
+                spec:
+                    containers:
+                        - name: backup-neo4j
+                          image: mesosphere/aws-cli:latest
+                          command:
+                              - "/bin/sh"
+                              - "-c"
+                              - |
+                                  apk -v --update add --no-cache --quiet curl
+                                  NOW="$(date "+%Y-%m-%d-%H:%M:%S")"
+                                  BACKUP_SCHEMA_NAME="graph.db-backup-$NOW.schema"
+                                  BACKUP_DATA_NAME="graph.db-backup-$NOW.data"
+                                  BACKUP_NAME="graph.db-backup-$NOW"
+                                  curl --user neo4j:test -H accept:application/json -H content-type:application/json \
+                                    -d '{"statements":[{"statement":"CALL apoc.export.cypher.schema(\"\/var\/lib\/neo4j\/data\/'$BACKUP_SCHEMA_NAME'\", {})"}]}' \
+                                    http://neo4j:7474/db/data/transaction/commit
+                                  curl --user neo4j:test -H accept:application/json -H content-type:application/json \
+                                    -d '{"statements":[{"statement":"CALL apoc.export.graphml.all(\"\/var\/lib\/neo4j\/data\/'$BACKUP_DATA_NAME'\", {useTypes: true, readLabels: true})"}]}' \
+                                    http://neo4j:7474/db/data/transaction/commit
+                                  printf "\nWaiting for APOC export..."
+                                  while [ ! -f /var/lib/neo4j/data/$BACKUP_DATA_NAME ]; do echo "backup data file does not exist, sleeping: /var/lib/neo4j/data/$BACKUP_DATA_NAME" && sleep 5; done
+                                  printf "\nTarring -> /var/lib/neo4j/data/$BACKUP_SCHEMA_NAME  and /var/lib/neo4j/data/$BACKUP_DATA_NAME to /var/lib/neo4j/data/$BACKUP_NAME.tar"
+                                  tar -cvf "/var/lib/neo4j/data/$BACKUP_NAME.tar" -C "/var/lib/neo4j/data/" $BACKUP_SCHEMA_NAME $BACKUP_DATA_NAME
+                                  printf "Zipping -> /var/lib/neo4j/data/$BACKUP_NAME.tar.gz\n"
+                                  gzip -9 "/var/lib/neo4j/data/$BACKUP_NAME.tar"
+                                  printf "Zipped backup size:"
+                                  du -hs "/var/lib/neo4j/data/$BACKUP_NAME.tar.gz"
+                                  printf "Pushing /var/lib/neo4j/data/$BACKUP_NAME.tar.gz -> $BUCKET"
+                                  aws s3 cp "/var/lib/neo4j/data/$BACKUP_NAME.tar.gz" "$BUCKET"
+                                  printf "Cleaning up /var/lib/neo4j/data/graph.db-backup*"
+                                  rm /var/lib/neo4j/data/graph.db-backup*
+                          env:
+                              - name: BUCKET
+                                value: {{ .Values.neo4j.backup.s3Path }}
+                          volumeMounts:
+                              - name: data
+                                mountPath: /var/lib/neo4j/data
+                    restartPolicy: Never
+                    volumes:
+                        - name: data
+                          persistentVolumeClaim:
+                              claimName: neo4j-pvc
+{{- end}}
\ No newline at end of file

amundsen-kube-helm/templates/helm/neo4j/values.yaml

@@ -18,3 +18,8 @@ config:
     heap_initial_size: 23000m
     heap_max_size: 23000m
     pagecache_size: 26600m
+neo4j:
+    backup:
+      enabled: false
+      s3Path: "s3://my-bucket/my-prefix"
+      schedule: "0 * * * *"