nadendlaprasad / opal-helm-chart

You know, for Kubernetes

OPAL Helm Chart for Kubernetes

OPAL is an administration layer for Open Policy Agent (OPA), detecting changes to both policy and policy data in realtime and pushing live updates to your agents.

OPAL brings open-policy up to the speed needed by live applications. As your application state changes (whether it's via your APIs, DBs, git, S3 or 3rd-party SaaS services), OPAL will make sure your services are always in sync with the authorization data and policy they need (and only those they need).

Check out OPAL main repo here.

Installation

OPAL Helm chart could be installed only with Helm 3. The chart is published to public Helm repository, hosted on GitHub itself. It's recommended to install OPAL into a dedicated namespace.

Add Helm repository

helm repo add permitio https://permitio.github.io/opal-helm-chart
helm repo update

Install the latest version

helm install --create-namespace -n opal-ns opal permitio/opal

Search for all available versions

helm search repo opal --versions

Deploy OPAL to your Kubernetes cluster

Install specific version (with default configuration):

helm install --create-namespace -n opal-ns --version x.x.x opal permitio/opal

Install specific version (with custom configuration provided as YAML):

helm install -f myvalues.yaml --create-namespace -n opal-ns --version x.x.x opal permitio/opal

myvalues.yaml must conform to the json schema.

Verify installation

OPAL Client should populate embedded OPA instance with polices and data from configured Git repository. To validate it - one could create port-forwarding to OPAL client Pod. Port 8181 is the embedded OPA agent.

kubectl port-forward -n opal-ns service/opal-client 8181:8181

Then, open http://localhost:8181/v1/data/ in your browser to check OPA data document state.

Important Configuration

This is not a comprehensive list, but includes the main variables you have to think about

Variable	Description
server.policyRepoUrl	Git repository holding policy code (& optionally policy data) to be tracked by OPAL
server.dataConfigSources	Data sources to be published to clients (and their managed OPAs)
server.dataConfigSources.config.entries	Static list of data source entries (See OPAL Docs)
server.dataConfigSources.external_source_url	URL to dynamically fetch data sources entries from (See OPAL Docs)
server.broadcastUri	Backend for broadcasting updates across multiple opal-server processes (necessary if either server.uvicornWorkers or server.replicas is > 1)
server.uvicornWorkers	Count of gunicorn workers (/processes) per opal-server replica
server.replicas	opal-server's deployment replica count
server.extraEnv	Extra configuration for opal-server (see OPAL Docs)
client.extraEnv	Extra configuration for opal-server OPAL Docs

Note: If you leave server.dataConfigSources with no entries - The chart would automatically set OPAL_DATA_UPDATER_ENABLED: False in client.extraEnv so client won't report an unhealthy state.