Copying mounted files with command in Kubernetes is slow - kubernetes

Question

I am creating an OrientDB cluster with Kubernetes (in Minikube) and I use Stateful Sets to create pods. I am trying to mount all the OrientDB cluster configs into a folder named configs. Using command I copy the files after mounting into the standard /orientdb/config folder. However, after I have added this functionality the pods were created at a slower rate and sometimes I get exceptions like:
Unable to connect to the server: net/http: TLS handshake timeout
Before that, I tried to mount configs directly into the /orientdb/config folder. But I had an error with permissions so I have researched that mounting to the root folder is prohibited.
How can I approach such an issue? And can I find some workaround?
The Stateful Set looks like this:
kind: StatefulSet
apiVersion: apps/v1
metadata:
name: orientdbservice
spec:
serviceName: orientdbservice
replicas: 3
selector:
matchLabels:
service: orientdb
type: container-deployment
template:
metadata:
labels:
service: orientdb
type: container-deployment
spec:
containers:
- name: orientdbservice
image: orientdb:2.2.36
command: ["/bin/sh","-c", "cp /configs/* /orientdb/config/ ; /orientdb/bin/server.sh -Ddistributed=true" ]
env:
- name: ORIENTDB_ROOT_PASSWORD
valueFrom:
secretKeyRef:
name: orientdb-password
key: password.txt
- name: POD_NAME
valueFrom:
fieldRef:
fieldPath: metadata.name
ports:
- containerPort: 2424
name: port-binary
- containerPort: 2480
name: port-http
volumeMounts:
- name: config
mountPath: /orientdb/config
- name: orientdb-config-backups
mountPath: /configs/backups.json
subPath: backups.json
- name: orientdb-config-events
mountPath: /configs/events.json
subPath: events.json
- name: orientdb-config-distributed
mountPath: /configs/default-distributed-db-config.json
subPath: default-distributed-db-config.json
- name: orientdb-config-hazelcast
mountPath: /configs/hazelcast.xml
subPath: hazelcast.xml
- name: orientdb-config-server
mountPath: /configs/orientdb-server-config.xml
subPath: orientdb-server-config.xml
- name: orientdb-config-client-logs
mountPath: /configs/orientdb-client-log.properties
subPath: orientdb-client-log.properties
- name: orientdb-config-server-logs
mountPath: /configs/orientdb-server-log.properties
subPath: orientdb-server-log.properties
- name: orientdb-config-plugin
mountPath: /configs/pom.xml
subPath: pom.xml
- name: orientdb-databases
mountPath: /orientdb/databases
- name: orientdb-backup
mountPath: /orientdb/backup
- name: orientdb-data
mountPath: /orientdb/bin/data
volumes:
- name: config
emptyDir: {}
- name: orientdb-config-backups
configMap:
name: orientdb-configmap-backups
- name: orientdb-config-events
configMap:
name: orientdb-configmap-events
- name: orientdb-config-distributed
configMap:
name: orientdb-configmap-distributed
- name: orientdb-config-hazelcast
configMap:
name: orientdb-configmap-hazelcast
- name: orientdb-config-server
configMap:
name: orientdb-configmap-server
- name: orientdb-config-client-logs
configMap:
name: orientdb-configmap-client-logs
- name: orientdb-config-server-logs
configMap:
name: orientdb-configmap-server-logs
- name: orientdb-config-plugin
configMap:
name: orientdb-configmap-plugin
- name: orientdb-data
hostPath:
path: /import_data
type: Directory
volumeClaimTemplates:
- metadata:
name: orientdb-databases
labels:
service: orientdb
type: pv-claim
spec:
accessModes: [ "ReadWriteOnce" ]
resources:
requests:
storage: 20Gi
- metadata:
name: orientdb-backup
labels:
service: orientdb
type: pv-claim
spec:
accessModes: [ "ReadWriteOnce" ]
resources:
requests:
storage: 10Gi