# Running Application Container 1. Create and run a container from the container image. ```sh docker run --rm -it -p 8080:8080 docker.io/audomsak/quarkus-todo-app:1.0 ``` The application can be started and run. However, you can see the logs complaining about database connection error. That's because the application has a dependency with PostgreSQL database so we have to start an instance of PostgreSQL first. Press `Ctrl+C` To stop the application (and contianer). *Example Output* ```sh exec java -Dquarkus.http.host=0.0.0.0 -Djava.util.logging.manager=org.jboss.logmanager.LogManager -XX:+ExitOnOutOfMemoryError -cp . -jar /deployments/app.jar ______ __ ___ /_ __/___ ____/ /___ / | ____ ____ / / / __ \/ __ / __ \ / /| | / __ \/ __ \ / / / /_/ / /_/ / /_/ / / ___ |/ /_/ / /_/ / /_/ \____/\__,_/\____/ /_/ |_/ .___/ .___/ /_/ /_/ Powered by Quarkus 2.16.3.Final 2023-02-27 07:26:58,718 INFO [io.agr.pool] (main) Datasource '': Initial size smaller than min. Connections will be created when necessary 2023-02-27 07:26:59,279 WARN [io.agr.pool] (agroal-11) Datasource '': The connection attempt failed. 2023-02-27 07:26:59,281 WARN [org.hib.eng.jdb.env.int.JdbcEnvironmentInitiator] (JPA Startup Thread) HHH000342: Could not obtain connection to query metadata: org.postgresql.util.PSQLException: The connection attempt failed. at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:354) at org.postgresql.core.ConnectionFactory.openConnection(ConnectionFactory.java:54) at org.postgresql.jdbc.PgConnection.(PgConnection.java:253) at org.postgresql.Driver.makeConnection(Driver.java:434) at org.postgresql.Driver.connect(Driver.java:291) at io.agroal.pool.ConnectionFactory.createConnection(ConnectionFactory.java:226) at io.agroal.pool.ConnectionPool$CreateConnectionTask.call(ConnectionPool.java:535) at io.agroal.pool.ConnectionPool$CreateConnectionTask.call(ConnectionPool.java:516) at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) at io.agroal.pool.util.PriorityScheduledExecutor.beforeExecute(PriorityScheduledExecutor.java:75) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) at java.base/java.lang.Thread.run(Thread.java:833) Caused by: java.net.UnknownHostException: todo-db at java.base/sun.nio.ch.NioSocketImpl.connect(NioSocketImpl.java:567) at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:327) at java.base/java.net.Socket.connect(Socket.java:633) at org.postgresql.core.PGStream.createSocket(PGStream.java:243) at org.postgresql.core.PGStream.(PGStream.java:98) at org.postgresql.core.v3.ConnectionFactoryImpl.tryConnect(ConnectionFactoryImpl.java:132) at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:258) ... 12 more 2023-02-27 07:27:00,220 INFO [io.qua.sma.ope.run.OpenApiRecorder] (main) CORS filtering is disabled and cross-origin resource sharing is allowed without restriction, which is not recommended in production. Please configure the CORS filter through 'quarkus.http.cors.*' properties. For more information, see Quarkus HTTP CORS documentation 2023-02-27 07:27:00,499 INFO [io.quarkus] (main) quarkus-todo-apps 1.0.0 on JVM (powered by Quarkus 2.16.3.Final) started in 5.339s. Listening on: http://0.0.0.0:8080 2023-02-27 07:27:00,499 INFO [io.quarkus] (main) Profile prod activated. 2023-02-27 07:27:00,500 INFO [io.quarkus] (main) Installed features: [agroal, cdi, hibernate-orm, hibernate-orm-panache, hibernate-validator, jdbc-postgresql, micrometer, narayana-jta, resteasy, resteasy-jsonb, smallrye-context-propagation, smallrye-health, smallrye-openapi, vertx] ^C2023-02-27 07:27:47,423 INFO [io.quarkus] (Shutdown thread) quarkus-todo-apps stopped in 0.073s ``` 2. To allow a communication between the application container and database container, we have to create a new private Docker network by running this command. ```sh docker network create quarkus-todo ``` *Example Output* ```sh efdf5c78cd423a021108dda21c7a141d4e8627b68dd8787943ad374f2cf44538 ``` 3. Run a PostgreSQL database container within the network we've just created above ```sh docker run --name todo-db \ -e POSTGRES_USER=todo \ -e POSTGRES_PASSWORD=todoPassword \ -e POSTGRES_DB=todo \ --network quarkus-todo \ -v $(pwd)/etc/init-db.sql:/docker-entrypoint-initdb.d/init-db.sql \ -d --rm postgres ``` *Example Output* ```sh 33cc043b7fbec34e36e85c0fdf85b1447dac5082f61d2296e13fbee1a4e2cb5c ``` 4. Run the applcation container again within the same network as PostgreSQL database container. The application should be started and run without any error. ```sh docker run --rm -it -p 8080:8080 --network quarkus-todo docker.io/audomsak/quarkus-todo-app:1.0 ``` *Example Output* ```sh exec java -Dquarkus.http.host=0.0.0.0 -Djava.util.logging.manager=org.jboss.logmanager.LogManager -XX:+ExitOnOutOfMemoryError -cp . -jar /deployments/app.jar ______ __ ___ /_ __/___ ____/ /___ / | ____ ____ / / / __ \/ __ / __ \ / /| | / __ \/ __ \ / / / /_/ / /_/ / /_/ / / ___ |/ /_/ / /_/ / /_/ \____/\__,_/\____/ /_/ |_/ .___/ .___/ /_/ /_/ Powered by Quarkus 2.16.3.Final 2023-02-27 08:27:41,084 INFO [io.agr.pool] (main) Datasource '': Initial size smaller than min. Connections will be created when necessary 2023-02-27 08:27:41,809 INFO [io.qua.sma.ope.run.OpenApiRecorder] (main) CORS filtering is disabled and cross-origin resource sharing is allowed without restriction, which is not recommended in production. Please configure the CORS filter through 'quarkus.http.cors.*' properties. For more information, see Quarkus HTTP CORS documentation 2023-02-27 08:27:41,992 INFO [io.quarkus] (main) quarkus-todo-apps 1.0.0 on JVM (powered by Quarkus 2.16.3.Final) started in 2.972s. Listening on: http://0.0.0.0:8080 2023-02-27 08:27:41,993 INFO [io.quarkus] (main) Profile prod activated. 2023-02-27 08:27:41,993 INFO [io.quarkus] (main) Installed features: [agroal, cdi, hibernate-orm, hibernate-orm-panache, hibernate-validator, jdbc-postgresql, micrometer, narayana-jta, resteasy, resteasy-jsonb, smallrye-context-propagation, smallrye-health, smallrye-openapi, vertx] ``` 5. Open `http://localhost:8080` URL in a web browser, you should see a webpage like this screenshot which means the application is working as expected. ![Todo App Homepage](https://4096465133-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fa3i2iCO0U9uw1JFkKW85%2Fuploads%2Fgit-blob-2c79d4679c3b2bd13c556b4f43aff6da7fe8af77%2Ftodo-app-homepage.png?alt=media) 6. Press `Ctrl+C` to stop and exit from application container *Example Output* ```sh ^C2023-02-27 08:56:33,780 INFO [io.quarkus] (main) quarkus-todo-apps stopped in 0.079s ``` 7. Stop PostgreSQL database container ```sh docker stop todo-db ```