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In the ever-evolving world of workflow management, the migration from Camunda 7 to Camunda 8 is an essential step for businesses seeking improved performance and new features. This article outlines the steps required to ensure a seamless transition and maintain functionality.
**1. Orient Yourself**
Before diving into the migration process, it's crucial to familiarise yourself with the changes between Camunda 7 and 8, particularly the introduction of job workers and improved architecture flexibility. Carefully read through Camunda 8 documentation to grasp new concepts, APIs, and tools available for migration.
**2. Set Up Camunda 8**
Camunda 8 offers various installation methods, such as Docker Compose, Helm charts, or running as a single JAR. Regardless of the chosen method, it's essential to set up the necessary infrastructure, including databases and storage systems, according to Camunda 8 requirements.
**3. Migrate Your Solution**
### **Adjust BPMN Models**
Ensure your BPMN models are compatible with Camunda 8 by reviewing supported features and updating models as needed. Utilise the Migration Analyser & Diagram Converter tool to help convert models from Camunda 7 to Camunda 8.
### **Adjust DMN Models**
Verify that decision tables and FEEL expressions work with Camunda 8’s DMN engine. Modify as necessary, and consider using FEEL Copilot for rewriting complex expressions.
### **Adjust Source Code**
Transition from Java Delegates to Camunda 8 job workers. Refactor code to use the client-worker architecture and Camunda 8 APIs. Ensure all dependencies are updated to be compatible with Camunda 8.
### **Data Migration**
Transfer runtime data from Camunda 7 to Camunda 8 using the Data Migrator Tool. Note that history and audit data migration will be available in Camunda 8.9. Verify data consistency and plan for backups and rollbacks.
**4. Testing and Validation**
Test individual components after migration to ensure compatibility and functionality. Validate how different components interact in the new environment, and perform comprehensive tests of entire processes to confirm they work as expected.
**5. Deployment**
Start with a pilot deployment to test the actual production environment. Once verified, deploy the entire system to production.
**6. Post-Migration Activities**
Continuously monitor the system to identify and address any issues that arise post-migration. Provide training to users on changes and new features, and update documentation to reflect the migrated system. Gather feedback from users and stakeholders, and use it to further improve the system and workflow efficiency.
In conclusion, migrating from Camunda 7 to Camunda 8 involves fundamental changes in architecture, APIs, and concepts. However, with careful planning, the right tools, and thorough testing, businesses can smoothly transition to the latest version of Camunda and reap the benefits of improved performance and new features.
- As part of the migration process, utilize data-and-cloud-computing technologies to store and manage data efficiently during the transition from Camunda 7 to Camunda 8, ensuring a seamless and secure migration.
- Familiarize yourself with various technology solutions available for migration, such as using cloud services or managed Kubernetes providers, to streamline the installation process for Camunda 8 and optimize overall workflow management.
