Openshift: Run docker-compoe in Openshift

Kompose is a open source tool that uses docker-compose file to deploy on kubernetes. Openshift is also Kubernetes based and Kompose is support Openshift too.

Parts of the Openshift series

• Part1: Install Opeshift
• Part2: How to Enable Auto Approval of CSR in Openshift v3.11
• Part3: Add new workers to Openshift cluster
• Part4: Chane the certificates of the Openshift cluster
• Part5: LDAP authentication for Openshift
• Part6: Keycloak SSO authentication for Openshift
• Part7: Gitlab SSO authentication for Openshift
• Part8a: Ceph persistent storage for Openshift
• Part8b: vSphere persistent storage for Openshift
• Part9: Helm on Openshift
• Part10: Tillerless Helm on Openshift
• Part11: Use external docker registry on Openshift
• Part12: Secondary router on Openshift
• Part13a: Use Letsencrypt on Openshift
• Part13b: Install cert-managger on Openshift
• Part14: Create Openshift operators
• Part15: Convert docker-compose file to Opeshift
• Part16a: Opeshift elasticsearch search-guard error
• Part16b: Openshift: Log4Shell - Remote Code Execution (CVE-2021-44228) (CVE-2021-4104)

Let’s say we have project with multiple microsevices that needs to deploy on Openshift and they have docker-compose.yml and Dockerfile. How do we deploy on Openshift?

Use Kompose to convert the docker-compose file to openshift compatible kubernetes config.

kompose convert -f docker-compose.yaml --provider=openshift

This command creates a separet yaml file for all kubernetes building block like “-imagestream.yaml”, “-service.yaml”, “-deploymentconfig.yaml” for each microservice. We can use these config files to deploy on Openshift easily.

kompose up --provider=openshift -f docker-compose.yml --build build-config --namespace=devopstales

If you have “build” option in docker-compose file, kompose automatically detects remote git url to deploy automatically.