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Quarkus multi tenant

In this example, we build a very simple quarkus application:

Requirements

To compile and run this demo you will need:

  • JDK 1.8+
  • GraalVM
  • NodeJS

Make sure you have this ports available

  • 80
  • 8080
  • 8180
  • 5432

Setup environment

  • Adding a host name in the /etc/hosts file
sudo gedit /etc/hosts

#paste this hostnames#
127.0.0.1       tenant1.maxilog.io
127.0.0.1       tenant2.maxilog.io
127.0.0.1       tenant3.maxilog.io
  • To start a Keycloak Server,Nginx, Postgres you can use Docker and just run the following command:
docker-compose -f src/main/docker/docker-compose.yaml up -d

You should be able to access your Keycloak Server at http://localhost:8180/auth .

Log in as admin to access the Keycloak Administration Console. Username should be admin and password admin.

For more details, see the Keycloak documentation about how to https://www.keycloak.org/docs/latest/server_admin/index.html#_create-realm[create a new realm].

Initialized Tenant

keycloak realms:
  • default:
    • Clients :
      • front
      • back | back (backend)
    • Users :
      • admin | admin
      • user | user
  • tenant1:
    • Clients :
      • front
      • back | back (backend)
    • Users :
      • admin | admin
      • user | user
  • tenant2:
    • Clients :
      • front
      • back | back (backend)
    • Users :
      • admin | admin
      • user | user
Databases:
  • default:
    • maxilog-default:
      • maxilog-default-user | maxilog-default-password
  • tenant1:
    • maxilog-tenant1:
      • maxilog-tenant1-user | maxilog-tenant1-password
  • tenant2:
    • maxilog-tenant2:
      • maxilog-tenant2-user | maxilog-tenant2-password

Get an access token

Change REALM, USERNAME and PASSWORD by the information of the realm you want to connect :

export access_token=$(\
    curl -X POST http://localhost:8180/auth/realms/REALM/protocol/openid-connect/token \
    --header 'Content-Type: application/x-www-form-urlencoded' \
    --data-urlencode 'username=USERNAME' \
    --data-urlencode 'password=PASSWORD' \
    --data-urlencode 'client_id=front' \
    --data-urlencode 'grant_type=password' | jq --raw-output '.access_token' \
 )

Example :

export access_token=$(\
    curl -X POST http://localhost:8180/auth/realms/tenant1/protocol/openid-connect/token \
    --header 'Content-Type: application/x-www-form-urlencoded' \
    --data-urlencode 'username=admin' \
    --data-urlencode 'password=admin' \
    --data-urlencode 'client_id=front' \
    --data-urlencode 'grant_type=password' | jq --raw-output '.access_token' \
 )

Get your task list

If you get the token from tenant1 realm :

curl -X GET -v http://localhost:8080/api/tasks/me \
--header  "x-tenant: tenant1" \
--header  "Authorization: Bearer $access_token"

Create new Tenant

To create new tenant you have to use default tenant.

Let's create tenant named tenant3

export access_token=$(\
    curl -X POST http://localhost:8180/auth/realms/default/protocol/openid-connect/token \
    --header 'Content-Type: application/x-www-form-urlencoded' \
    --data-urlencode 'username=admin' \
    --data-urlencode 'password=admin' \
    --data-urlencode 'client_id=front' \
    --data-urlencode 'grant_type=password' | jq --raw-output '.access_token' \
 )
 
curl -X POST -v http://localhost:8080/api/tenants/tenant3 \
--header  "x-tenant: default" \
--header  "Authorization: Bearer $access_token"

This command will create realm tenant3 and database maxilog-tenant3.

PS: In this case, you have to add hostname to /etc/hosts :

127.0.0.1 tenant3.maxilog.io

Backend(quarkus)

./mvnw compile quarkus:dev

This command will leave Quarkus running in the foreground listening on port 8080.

Frontend(angular)

cd src/main/webapp/
npm install
npm start

You should be able to access your angular app at http://tenant1.maxilog.io or http://tenant2.maxilog.io.

test