Final Note

Recap of what we’ve learned

In this course, we’ve covered two sections of troubleshooting containers—Docker and Kubernetes. For Docker, we looked at:

• Image builds: Fixed Dockerfile commands, and files found in the build context and referenced them properly. Ensured dependencies, and package installation were well configured while images were built.

• Network issues: Fixed container communication and network settings issues.

• Docker Compose issues: Fixed various Docker Compose file structures and package dependency issues.

• Resource control and cleaning: Ensured resources allocated to containers were controlled and set up jobs to clean resources not needed in the environment.

• Volume issues: Fixed volume mount issues and ensured files were properly referenced.

• Security in Docker: Images scanned for vulnerabilities, and privileges controlled.

For Kubernetes, we looked at:

• Reliability issues: Troubleshooted readiness and liveness probe errors and fixed them.

• Resource issues: Monitored resource utilization, set resource constraints, and considered autoscaling.

• Managing deployments: Covered how to manage application deployments in a cluster.

• Cluster logs: Checked how to review logs on pod, node, and cluster levels.

• Network, storage, and Ingress issues: Debugged service, Ingress, and storage issues, and resolved storage configurations.

• Backup and Disaster Recovery: Implemented backup and disaster recovery strategies.

Conclusion

As you complete this course on troubleshooting containers, in Docker and Kubernetes, you’ve acquired valuable skills and knowledge essential for effectively managing and maintaining containerized environments. Remember that troubleshooting isn’t just about solving problems, it’s also about embracing challenges as opportunities for growth.