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Docker is very attractive for developers of multi-tiered architecture systems. Each individual application service (e.g. presentation, processing, data, etc.) are setup in individual containers. These are resources that are isolated to allow multiple independent containers to run on a single kernel instance.
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The real cloud power of Docker containers is achieved through one of the "container management" tools or frameworks. Container management tools provide functionality for bootstrapping, scheduling, discovery, configuration, proxies, application monitoring, replication, and software defined network fabrics. You can sort of think of these tools are as vCenter for your containers and applications. There are currently three major frameworks for container management:
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