Getting used to a more intricate orchestration system is necessary when switching from Docker Swarm to Kubernetes. Among the difficulties and fixes are:
Variations in Configuration:
Problem: Kubernetes manifests, and Docker Compose files are not directly compatible.
Solution: Either manually rewrite Compose files as Kubernetes YAML files or convert them using tools like Kompose.
Changes in Networking:
Problem: Kubernetes employs a more advanced networking architecture.
Solution: Comprehend the networking principles of Kubernetes (such as Services and Ingress) and set them up appropriately.
Stateful applications:
Challenge: Data consistency problems may arise when stateful workloads are migrated.
Solution: Use Kubernetes Persistent Volumes (PVs) and Persistent Volume Claims (PVCs) to manage storage.
Learning Curve:
Challenge: Kubernetes is more complex than Docker Swarm.
Solution: Invest in training and use managed Kubernetes services (e.g., EKS, AKS) for easier management.
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