Docker Swarm + Consul によるコンテナマネージメント（スケーラビリティとロードバランサー）
Swarm mode overview
Consul : Open Source Software
Docker Consul
https://hub.docker.com/_/consul
Docker Swarm vs. Kubernetes: A Comparison
K8s and Docker Swarm have many of the same features, but each tool shines in different aspects. The table below offers a head-to-head Kubernetes vs Docker Swarm comparison:
| Point of comparison | Kubernetes | Docker Swarm |
|---|---|---|
| Main selling point | A complete container orchestration solution with advanced automation features and high customization | An emphasis on ease of use and a seamless fit with other Docker products |
| Installation | Somewhat complex as you need to install (and learn to use) kubectl | Quick and easy setup (if you already run Docker) |
| Learning curve | High learning curve (but has more features) | Lightweight and easy to use (but limited functionality) |
| GUI | Detailed native dashboards | No out-of-the-box dashboards (but you can integrate a third-party tool) |
| Cluster setup | Difficult to start a cluster (but the cluster is very strong once set up) | Easy to start a cluster |
| Availability features | Self-healing, intelligent scheduling, and replication features | Availability controls and service duplication |
| Scalability | All-in-one scaling based on traffic | Values scaling quickly (approx. 5x faster than K8s) over scaling automatically |
| Horizontal auto-scaling | Yes | No |
| Monitoring capabilities | Has built-in monitoring and logging | Basic server log and event tools, but needs a third-party tool for advanced monitoring |
| Load balancing | No built-in mechanism for auto load-balancing | Internal load balancing |
| Security features | Relies on transport layer security (TLS) and access control-related tasks | Supports multiple security protocols (RBAC authorization, TLS/SSL, secrets management, policies, etc.) |
| CLI | Needs a separate CLI | Integrated Docker CLI, which can limit the functionality in some use cases |
| Community | Huge and active community | Reasonably popular, but the user base is getting smaller since the Mirantis acquisition |
| Optimal use case | High-demand apps with a complex configuration | Simple apps that are quick to deploy and easy to manage |
