System requirements

Software

Requirement	Version
Juju	3.4 or later
Kubernetes	A cluster supported by Juju, with a default storage class
DataHub workload	1.4 series (packaged as rocks with the charm resources)

Cloud topology

DataHub requires a multi-cloud setup:

Component	Cloud
DataHub (this charm)	Kubernetes
PostgreSQL	Kubernetes or machine
Kafka and ZooKeeper	Kubernetes or machine
OpenSearch	Machine only

A multi-cloud setup can be achieved with a single controller that has multiple clouds registered (used by the Terraform product module) or with two controllers of one cloud each. The single-controller setup uses cross-model relations, which are more stable than cross-controller relations.

Host requirements for OpenSearch

The machine host running OpenSearch requires these kernel parameters:

vm.max_map_count=262144
vm.swappiness=0
net.ipv4.tcp_retries2=5
fs.file-max=1048576

Resource sizing

For a single-host evaluation deployment (the tutorial setup with the full data platform co-located):

Resource	Minimum
CPU	8 threads
RAM	24 GB
Disk	80 GB

The DataHub pod alone runs three workloads: two JVM services (GMS and frontend) and the Python-based actions framework. Production sizing depends on metadata volume and ingestion frequency; monitor JVM heap metrics (see Observability) to size the deployment.

Supported dependency channels

The deployment flows in this documentation are tested with:

Charm	Channel
postgresql	14/stable
kafka	3/stable
zookeeper	3/stable
opensearch	2/stable
self-signed-certificates	latest/stable
traefik-k8s	latest/stable