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Support Article

Unable to execute the Pega Docker Container

KCP-166

Summary



A Docker Deamon is executed on AWS. On spinning up a new Docker Container, which is the official running Image of DockerHub: https://hub.docker.com/r/pegasystems/pega, the user is unable to execute the Pega Docker Container.

During the startup, the following command is used:

docker run -p 8080:8080 -e DB_HOST=pega83dbfull_baseline -e DB_NAME=pega83 -e DB_USERNAME=pega83 -e DB_PASSWORD=pegasys -e JDBC_URL=jdbc:postgresql://localhost:5432/pega83 -e JDBC_CLASS=org.postgresql.Driver --link pega83dbfull_baseline --name pega83 pegasystems/pega:8.3


Error Messages



java.sql.SQLException: Cannot load JDBC driver class 'org.postgresql.Driver'


Steps to Reproduce

  1. Retrieve the image from the Docker Hub.
  2. Execute the Image with the related command. The build fails


Root Cause



A defect or configuration issue in the operating environment.
The command to execute the Docker pointed to the local host instead of the container's IP address. Since it was unable to point to the database, the server failed to start.


Resolution



Perform the following local-change:
  1. Execute docker inspect db_container_name 
  2. Copy the IP address from networks {} and use it while connecting to the database.
  3. Provide a URL to download the driver file (https://jdbc.postgresql.org/download/postgresql-42.2.2.jre6.jar).
  4. Ensure to provide the Env variables for the Rules and the Data Schema.

    Execute:

    docker run -p 8088:8080 -e DB_NAME=pega -e DB_USERNAME=pega

    -e DB_PASSWORD=pegasys -e JDBC_URL=jdbc:postgresql://IP_OF_Container:5432/pega

    -e JDBC_CLASS=org.postgresql.Driver

    -e JDBC_DRIVER_URI=https://jdbc.postgresql.org/download/postgresql-42.2.2.jre6.jar

    -e RULES_SCHEMA=pegarules -e DATA_SCHEMA=pegadata pegasystems/pega:8.3

Suggest Edit

Published December 2, 2021

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