# The Entando Operator
The Entando Operator processes the custom resources in Kubernetes that represent the different components of an Entando application. The goal of the operator is to provide automation and a set of default configuration options to simplify and accelerate the deployment of an Entando application.
The sections below provide details and assumptions that the operator makes when deploying Entando Custom Resources. If you're using OpenShift, these sections will provide details on how to configure your deployment via the Operator Hub.
For details on the individual custom resources and their configuration, check out the custom resources documentation. See the instructions here on deploying via the Entando Operator.
# TLS Secret Creation
When configuring and deploying Entando via the operator, you will be asked to provide a secret for some of the components in the architecture. A few things to be aware of when creating and configuring a Secret:
- The Secret is assumed to be in the same namespace as the component being created.
- This Secret is expected to have a private key, and a certificate for the hostname (or a wildcard certificate) that the service will be exposed on.
- Refer to the 'ingressHostname' property in the custom resource for more information on how the hostname is determined.
- If a Secret isn't provided, the Entando Operator will evaluate the value of the
ENTANDO_PATH_TO_TLS_KEYPAIR, which is expected to contain two files: tls.key and tls.crt.
- If a key pair is found in the folder specified, the operator will use that key pair.
- If a key pair is not found, the Entando Operator will evaluate the value of the
ENTANDO_USE_AUTO_CERT_GENERATION. If that property is set to
true, the Entando Operator will assume that the cluster has been configured with a valid Certificate Authority (CA) and leave it to the Ingress controller to generate its own certificates.
# Database Deployment
Some Entando components include the option to select a database management system (DBMS):
The value of the DBMS field in Entando Custom Resources can be mysql, oracle, postgresql or embedded.
- IMPORTANT! -- If embedded is selected for a component, only one replica for the component can be created.
- IMPORTANT! -- Oracle instances are not supported for automatic deployment in a container. You must create your own Oracle instance or reuse an existing instance and then configure the external database for your EntandoApp.
If an EntandoDatabaseService has been deployed in the component's namespace and the DBMS specified for this EntandoDatabaseService is the same as the DBMS specified for this EntandoApp, then the Entando Operator will create dedicated schemas (in the case of PostgreSQL or Oracle), or databases in the case of MySQL.
- If a matching EntandoDatabaseService does not exist in this namespace, the Entando Operator will automatically deploy the appropriate container to host the DBMS specified. This last option is not yet supported for Oracle.
For an EntandoApp, three schemas/databases will be created: the Entando Port DB, tne Entando Serv DB and a database for the Entando Component Manager.
- If the Port and Serv schemas/databases are empty, the Entando Operator will use the underlying Entando App to populate these databases with the data backup available in the standard backup path in the WAR deployment.
- In scenarios where the EntandoApp needs to connect to an existing database that is fully managed
by the customer, it is best to setup the standard database connection variables using the
spec.environmentVariablesproperty and set this property to 'none'. This will skip any database preparations steps in the deployment.
When deploying a component the operator will evaluate the spec and if it supports the standard
property, the value of this property will be given to the component's
spec.dbms. Please consult
the documentation for each component's CRD to determine how each Entando resource uses the dbms (if any).
# Ingress Path Generation
When deploying an Entando Custom Resource that uses an Ingress path:
ingressHostNameproperty defines the host path that will be used to access this service from outside the cluster. The Entando Operator will create an ingress with this hostname and expose the resource at its default path.