Skip to main content

Installing the Docker environment

It guides you how to create a DockerFile in the Docker environment to install and run the Node.js agent. For the example file used in the following guide, see the following link.

File structure​

The Node.js agent's sample file has the structure as follows.

  • html: Sample application folder.

  • Dockerfile: Configuration file to build the Docker image.

  • http.js: Sample application file.

  • package.json: Document for the sample application information and dependency management.

  • whatap.conf: Option configuration file for monitoring.

  • security.conf (or paramkey.txt): Parameter encryption key.

Installing the agent​

Add the Node.js agent in the package.json file or execute the npm installation command.

package.json
"dependencies": {
    "whatap": "^0.4.72"
}
npm install --save whatap

Container image building​

Write the Docker file to build the image.

Dockerfile
FROM node:latest

WORKDIR /app
ADD . .

RUN npm install

CMD ["node","http.js"]

Build​

Execute the build command.

$ docker build -t sampleapp/nodejs:0503 .

Execution​

Start the container by setting the collection server IP and access key in the environment variables. The application runs along with the Node.js agent.

export WHATAP_LICENSE={access Key}
export WHATAP_SERVER_HOST={collection server IP}

$ docker run --rm -p 3500:3500 \
    -e whatap_server_host=$WHATAP_SERVER_HOST \
    -e license=$WHATAP_LICENSE \
    sampleapp/nodejs:0503