Mirantis recently announced the release of Mirantis Kubernetes Engine (MKE) 4, signaling a strategic pivot toward Kubernetes. In their official press release, Mirantis stated:

"For existing MKE users, upgrading to MKE 4 requires just one command or a single click. Users of MKE 3.7 can easily transition while keeping all workloads running. For Swarm users, Mirantis will continue support in MKE 3."

While Mirantis has pledged to maintain Swarm support in the MKE 3 series, the release of MKE 4—with its complete focus on Kubernetes—makes one thing clear: the clock is ticking for Swarm users. If you rely on Swarm as your container orchestration tool, now is the time to consider your next steps.

For those who, either by choice, or are required to remain on Swarm for legacy reasons, Portainer is the ideal solution, It offers continuity, a seamless transition path, and an unparalleled user experience for both Swarm and Kubernetes environments, especially if you’re comparing Docker desktop competitors and want a smoother path from local work to multi-cluster ops.

Why You Need to Plan for the Future of Swarm

Mirantis’ decision to limit Swarm support to MKE 3 raises several concerns for Swarm users:

1. No New Features or Innovations
   The focus on Kubernetes in MKE 4 means Swarm is effectively in maintenance mode. While Mirantis will address critical issues, there’s no guarantee of future enhancements or compatibility improvements.
2. Increasing Security Risks
   Over time, relying on an older version of MKE with limited updates could expose your environment to unpatched vulnerabilities and compatibility issues with modern container runtimes.
3. Integration Challenges
   The industry is rapidly converging on Kubernetes as the standard for container orchestration. New tools, technologies, and platforms are increasingly designed with Kubernetes in mind, leaving Swarm users at risk of being left behind.

Why Portainer is the Ideal Solution for Swarm Users

Portainer bridges the gap between the simplicity of Swarm and the growing dominance of Kubernetes. For teams evaluating Docker Swarm vs Kubernetes, Portainer provides a practical way to run both side by side and make a measured, low-risk transition based on real operational experience rather than theory. Here’s why it’s the perfect fit for Swarm users facing this transition:

1. Seamless Swarm Support

Portainer fully supports Docker Swarm, allowing you to continue managing your Swarm environments with ease. If you love Swarm’s straightforward approach to container orchestration, you can keep using it while benefiting from Portainer’s enhanced management capabilities.

2. Gradual Transition to Kubernetes

Portainer doesn’t force you to choose between Swarm and Kubernetes. Instead, it allows you to:

• Manage Both Orchestrators: Operate Swarm and Kubernetes clusters side by side within the same interface.
• Transition at Your Own Pace: Migrate workloads incrementally without operational disruptions.
• Learn Kubernetes Slowly: Use Portainer’s intuitive interface to manage Kubernetes without diving headfirst into its complexities.

3. Simplicity Meets Scalability

Portainer combines the simplicity Swarm users love with the scalability of Kubernetes:

• Streamlined UI: Manage stacks, networks, and services with ease.
• Guided Kubernetes Workflows: Deploy applications without writing complex Kubernetes manifests.
• Built-in GitOps: Automate codified deployments for both Swarm and Kubernetes environments.

4. Enterprise-Grade Features

Portainer provides advanced functionality that makes it suitable for enterprise use:

• Multi-Cluster Management: Oversee multiple Swarm or Kubernetes clusters from a single pane of glass.
• Role-Based Access Control (RBAC): Enforce granular permissions for secure, multi-team environments.
• Monitoring and Troubleshooting: Gain visibility into workloads and simplify debugging with integrated tools.

5. Reduced Costs and Operational Overhead

Unlike Kubernetes, which often requires hiring specialized staff or investing in extensive training, Portainer empowers your existing team to manage Swarm and Kubernetes with minimal additional resources.

Why Swarm Users Should Choose Portainer

If you’re a Swarm user, switching to Portainer is not just a smart move—it’s a necessary one. Here’s why:

• Continuity: Stick with Swarm while maintaining access to modern tools and active support.
• Flexibility: Transition to Kubernetes on your own terms, without a forced migration.
• Ease of Use: Manage both orchestrators through a unified, intuitive interface.
• Support: Enjoy the backing of an enterprise-grade platform used by Fortune 500 companies, governments, and aerospace organizations.

In summary, the release of MKE 4 marks a turning point for Docker Swarm users. While Mirantis has promised continued support in MKE 3, the writing is on the wall: Kubernetes is the future.

With Portainer, you don’t have to abandon the simplicity of Swarm or rush into the complexities of Kubernetes. Portainer provides the tools you need to manage Swarm today and transition to Kubernetes tomorrow—all without missing a beat.

For further information you might like to read about this customer's experience in migrating from Mirantis to Portainer.  Read more. 

Infrastructure Moves Fast. Stay Ahead.

Subscribe to our monthly newsletter

Neil Cresswell is the co-founder and CEO of Portainer, a popular platform that simplifies container management for Docker, Kubernetes, and edge environments. A veteran of over 25 years in IT, he began his career with 12 years at IBM before leading VMware consulting at ViFX across Asia-Pacific and serving as CEO for cloud service providers. Frustrated by the lack of usable tooling for “containers as a service,” he created Portainer to make container technology accessible to everyone. Under his leadership, Portainer has grown from an open-source UI into an enterprise-ready platform used globally.