keycloak-scim/docs/guides/src/main/operator/basic-deployment.adoc

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<#import "/templates/kc.adoc" as kc>
<#import "/templates/options.adoc" as opts>
<#import "/templates/links.adoc" as links>

<@tmpl.guide
title="Basic Keycloak Deployment"
summary="How to install Keycloak using the Operator on Kubernetes or OpenShift">

== Basic Keycloak Deployment
In this guide we will show how to have a basic Keycloak Deployment on Kubernetes or OpenShift using the Operator.
We assume that the Operator is correctly installed and running in the cluster namespace.

=== Pre-requisites

* Database
* Hostname
* TLS Certificate and associated keys

==== Database

A database should be available and accessible from the cluster namespace where you want to install Keycloak.
Please refer to <@links.server id="db"/> for the list of supported databases.
The Keycloak Operator does not manage the database and you need to provision it yourself, we suggest to verify your cloud provider offering or use a database Operator such as https://access.crunchydata.com/documentation/postgres-operator/latest/[Crunchy].


For development purposes you can use an ephemeral Postgres pod installation.
You can provision it using the following commands:

[source,bash]
----
cat <<EOF >> example-postgres.yaml
apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: postgresql-db
spec:
  serviceName: postgresql-db-service
  selector:
    matchLabels:
      app: postgresql-db
  replicas: 1
  template:
    metadata:
      labels:
        app: postgresql-db
    spec:
      containers:
        - name: postgresql-db
          image: postgres:latest
          env:
            - name: POSTGRES_PASSWORD
              value: testpassword
            - name: PGDATA
              value: /data/pgdata
            - name: POSTGRES_DB
              value: keycloak
---
apiVersion: v1
kind: Service
metadata:
  name: postgres-db
spec:
  selector:
    app: postgresql-db
  type: LoadBalancer
  ports:
  - port: 5432
    targetPort: 5432
EOF
kubectl|oc apply -f example-postgres.yaml
----

==== Hostname

To have a production ready installation you need to provide the hostname that will be used to contact Keycloak.
Please refer to <@links.server id="hostname"/> for the available configurations.

For development purposes we will use from now on `test.keycloak.org`.

==== TLS Certificate and key

Please refer to Certification Authority of choice to obtain the certificate and the key.

For development purposes you can use this command to obtain a self-signed certificate:

[source,bash]
----
openssl req -subj '/CN=test.keycloak.org/O=Test Keycloak./C=US' -newkey rsa:2048 -nodes -keyout key.pem -x509 -days 365 -out certificate.pem
----

and you should install it in the cluster namespace as a Secret by running:

[source,bash]
----
kubectl create secret tls example-tls-secret --cert certificate.pem --key key.pem
----

=== Deploying Keycloak

To deploy Keycloak you have to create a Custom Resource (CR from now on) shaped after the Keycloak Custom Resource Definition (CRD).

We suggest you to first store the Database credentials in a separate Secret, you can do it for example by running:
[source,bash]
----
kubectl create secret generic keycloak-db-secret \
  --from-literal=username=[your_database_username] \
  --from-literal=password=[your_database_password]
----

The Keycloak CRD allow you to customize several fields but, for a simple deployment you can use the following example:

[source,bash]
----
cat <<EOF >> example-kc.yaml
apiVersion: keycloak.org/v2alpha1
kind: Keycloak
metadata:
  name: example-kc
spec:
  instances: 1
  serverConfiguration:
    - name: db
      value: postgres
    - name: db-url-host
      value: postgres-db
    - name: db-username
      secret:
        name: keycloak-db-secret
        key: username
    - name: db-password
      secret:
        name: keycloak-db-secret
        key: password
  hostname: test.keycloak.org
  tlsSecret: example-tls-secret
EOF
kubectl|oc apply -f example-kc.yaml
----

And you can check that the Keycloak instance has been provisioned in the cluster by looking at the status of the created CR:

[source,bash]
----
kubectl get keycloaks/example-kc -o go-template='{{range .status.conditions}}CONDITION: {{.type}}{{"\n"}}  STATUS: {{.status}}{{"\n"}}  MESSAGE: {{.message}}{{"\n"}}{{end}}'
----

When the Deployment is ready the output will look like the following:

[source,bash]
----
CONDITION: Ready
  STATUS: true
  MESSAGE: 
CONDITION: HasErrors
  STATUS: false
  MESSAGE: 
CONDITION: RollingUpdate
  STATUS: false
  MESSAGE:
----

=== Accessing the Keycloak Deployment

The Keycloak deployment is, by default, exposed through a basic nginx ingress and it will be accessible through the provided hostname.

For debugging and development purposes we suggest you to directly connect to the Keycloak service using a port forward:

[source,bash]
----
kubectl port-forward service/example-kc-service 8443:8443
----

</@tmpl.guide>