139 lines
4.7 KiB
Text
139 lines
4.7 KiB
Text
|
|
[[_external_database]]
|
|
=== Connecting to an external database
|
|
|
|
You can use the Operator to connect to an external PostgreSQL database by modifying the Keycloak custom resource and creating a `keycloak-db-secret` YAML file. Note that values are Base64 encoded.
|
|
|
|
.Example YAML file for `keycloak-db-secret`
|
|
```yaml
|
|
apiVersion: v1
|
|
kind: Secret
|
|
metadata:
|
|
name: keycloak-db-secret
|
|
namespace: keycloak
|
|
stringData:
|
|
POSTGRES_DATABASE: <Database Name>
|
|
POSTGRES_EXTERNAL_ADDRESS: <External Database IP or URL (resolvable by K8s)>
|
|
POSTGRES_EXTERNAL_PORT: <External Database Port>
|
|
# Strongly recommended to use <'Keycloak CR Name'-postgresql>
|
|
POSTGRES_HOST: <Database Service Name>
|
|
POSTGRES_PASSWORD: <Database Password>
|
|
# Required for AWS Backup functionality
|
|
POSTGRES_SUPERUSER: true
|
|
POSTGRES_USERNAME: <Database Username>
|
|
type: Opaque
|
|
```
|
|
|
|
The following properties set the hostname or IP address and port of the database.
|
|
|
|
* `POSTGRES_EXTERNAL_ADDRESS` - an IP address or a hostname of the external database.
|
|
ifeval::[{project_community}==true]
|
|
This address needs be resolvable in a Kubernetes cluster.
|
|
endif::[]
|
|
* `POSTGRES_EXTERNAL_PORT` - (Optional) A database port.
|
|
|
|
The other properties work in the same way for a hosted or external database. Set them as follows:
|
|
|
|
* `POSTGRES_DATABASE` - Database name to be used.
|
|
* `POSTGRES_HOST` - The name of the `Service` used to communicate with a database. Typically `keycloak-postgresql`.
|
|
* `POSTGRES_USERNAME` - Database username
|
|
* `POSTGRES_PASSWORD` - Database password
|
|
* `POSTGRES_SUPERUSER` - Indicates, whether backups should run as super user. Typically `true`.
|
|
|
|
The Keycloak custom resource requires updates to enable external database support.
|
|
|
|
.Example YAML file for `Keycloak` custom resource that supports an external database
|
|
```yaml
|
|
apiVersion: keycloak.org/v1alpha1
|
|
kind: Keycloak
|
|
metadata:
|
|
labels:
|
|
app: sso
|
|
name: example-keycloak
|
|
namespace: keycloak
|
|
spec:
|
|
externalDatabase:
|
|
enabled: true
|
|
instances: 1
|
|
```
|
|
|
|
.Prerequisites
|
|
|
|
* You have a YAML file for `keycloak-db-secret`.
|
|
* You have modified the Keycloak custom resource to set `externalDatabase` to `true`.
|
|
* You have cluster-admin permission or an equivalent level of permissions granted by an administrator.
|
|
|
|
.Procedure
|
|
|
|
. Locate the secret for your PostgreSQL database: `{create_cmd_brief} get secret <secret_for_db> -o yaml`. For example:
|
|
+
|
|
[source,bash,subs=+attributes]
|
|
----
|
|
$ {create_cmd_brief} get secret keycloak-db-secret -o yaml
|
|
apiVersion: v1
|
|
data
|
|
POSTGRES_DATABASE: cm9vdA==
|
|
POSTGRES_EXTERNAL_ADDRESS: MTcyLjE3LjAuMw==
|
|
POSTGRES_EXTERNAL_PORT: NTQzMg==
|
|
----
|
|
+
|
|
The `POSTGRES_EXTERNAL_ADDRESS` is in Base64 format.
|
|
|
|
. Decode the value for the secret: `echo "<encoded_secret>" | base64 -decode`. For example:
|
|
+
|
|
[source,bash,subs=+attributes]
|
|
----
|
|
$ echo "MTcyLjE3LjAuMw==" | base64 -decode
|
|
192.0.2.3
|
|
----
|
|
|
|
. Confirm that the decoded value matches the IP address for your database:
|
|
+
|
|
[source,bash,subs=+attributes]
|
|
----
|
|
$ {create_cmd_brief} get pods -o wide
|
|
NAME READY STATUS RESTARTS AGE IP
|
|
keycloak-0 1/1 Running 0 13m 192.0.2.0
|
|
keycloak-postgresql-c8vv27m 1/1 Running 0 24m 192.0.2.3
|
|
----
|
|
|
|
. Confirm that `keycloak-postgresql` appears in a list of running services:
|
|
+
|
|
[source,bash,subs=+attributes]
|
|
----
|
|
$ {create_cmd_brief} get svc
|
|
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
|
|
keycloak ClusterIP 203.0.113.0 <none> 8443/TCP 27m
|
|
keycloak-discovery ClusterIP None <none> 8080/TCP 27m
|
|
keycloak-postgresql ClusterIP 203.0.113.1 <none> 5432/TCP 27m
|
|
----
|
|
+
|
|
The `keycloak-postgresql` service sends requests to a set of IP addresses in the backend. These IP addresses are called endpoints.
|
|
|
|
. View the endpoints used by the `keycloak-postgresql` service to confirm that they use the IP addresses for your database:
|
|
+
|
|
[source,bash,subs=+attributes]
|
|
----
|
|
$ {create_cmd_brief} get endpoints keycloak-postgresql
|
|
NAME ENDPOINTS AGE
|
|
keycloak-postgresql 192.0.2.3.5432 27m
|
|
----
|
|
|
|
. Confirm that {project_name} is running with the external database. This example shows that everything is running:
|
|
+
|
|
[source,bash,subs=+attributes]
|
|
----
|
|
$ {create_cmd_brief} get pods
|
|
NAME READY STATUS RESTARTS AGE IP
|
|
keycloak-0 1/1 Running 0 26m 192.0.2.0
|
|
keycloak-postgresql-c8vv27m 1/1 Running 0 36m 192.0.2.3
|
|
----
|
|
|
|
ifeval::[{project_community}==true]
|
|
.Additional Resources
|
|
|
|
* To back up your database using custom resources, see xref:_backup-cr[Scheduling database backups].
|
|
|
|
|
|
* For more information on Base64 encoding, see the https://kubernetes.io/docs/concepts/configuration/secret/[Kubernetes Secrets manual].
|
|
endif::[]
|