CODEWITHSUNDEEP
dockercassandrajettydockerfile
Prasad Khode
Prasad Khode

Reputation: 6739

Creating docker container with Jetty and Cassandra

Installed docker on Cent OS using the steps mentioned here

So far I can run docker images of jetty and cassandra independently by following the steps mentioned Jetty & Cassandra

I want to create a docker container which will have Cassandra database and a web application running in Jetty server which interacts with this database.

I'm able to create docker container with Jetty and able to run some sample web application with in jetty using the following Dockerfile content

FROM jetty
RUN mkdir /var/lib/jetty/webapps/test-app
COPY index.html /var/lib/jetty/webapps/test-app/

and once I save this file as Dockerfile I issue the following commands to create docker image and run the same

docker build -t test-docker .

docker run -d -p 8443:8080 test-docker

now I can see the same outcome of this application in my browser using

<ip_address>:8443/test-app/index.html

Question:

How I should be able to integrate Cassandra database with in this docker image and run the complete Jetty + Cassandra + Web Application packaged as a group?

Upvotes: 2

Views: 1237

Answers (2)

Prasad Khode
Prasad Khode

Reputation: 6739

As mentioned in the Docker Cassandra Documentation instead of running cassandra with 

docker run --name some-cassandra -d cassandra:tag

mention all the ports that cassandra uses so that the same can be communicated or interacted from external resources like below

docker run --name some-cassandra -d -p 7000:7000 -p 7001:7001 -p 7199:7199 -p 9042:9042 -p 9160:9160 cassandra:tag

Now my web application running in Jetty Container can access the Cassandra database using Java Driver.

Note: if you are using Cassandra version > 3.0 then you should use cassandra-driver-core of version >= 3.0

Maven dependency for cassandra-driver-core 

<dependency>
    <groupId>com.datastax.cassandra</groupId>
    <artifactId>cassandra-driver-core</artifactId>
    <version>3.0.0</version>
</dependency>

and cassandra-driver-mapping

<dependency>
    <groupId>com.datastax.cassandra</groupId>
    <artifactId>cassandra-driver-mapping</artifactId>
    <version>3.0.0</version>
</dependency>

Upvotes: 1

Gangaraju
Gangaraju

Reputation: 4562

You can use Cassandra Official Docker Image, to start cassandra database. Start your web application in a seperate container as you are doing right now.

You can link cassandra container with your web application container

docker run --name webapp --link cassandra:cassandra -d test-docker

You need to use cassandra hostname/container IP in the webapplication. You can pass the cassandra DB_URL as environment variable.

docker run --name webapp --link cassandra:cassandra  -e DB_URL='cassandra:7000' -d test-docker

Read more about Docker container Linking

Upvotes: 0

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