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Add to SafariWhen comparing Marathon on Apache Mesos vs Nomad, the Slant community recommends Nomad for most people. In the question“What are the best Docker orchestration tools?” Nomad is ranked 3rd while Marathon on Apache Mesos is ranked 8th. The most important reason people chose Nomad is:
Being focused on one thing only also has its advantages. For one, Nomad is very simple architecturally. There's only a single binary for both clients and servers, it also does not need any external services for any coordination or storage.
Question Ranking
Pros
Pro Extremely fault-tolerant
Mesos handles (HA) master or agent failover; Marathon HA can survive scheduler failover; and Marathon automatically restarts failed tasks to maintain the desired number of task instances.
Pro Mesos is battle-tested at scale in production
Running all of Twitter, Apple's Siri, etc.
Pro Scalable to 10,000s of containers
Pro Free and Open Source
Pro Also supports non-Docker cgroups containers
Pro Simple, minimal architecture
Being focused on one thing only also has its advantages. For one, Nomad is very simple architecturally. There's only a single binary for both clients and servers, it also does not need any external services for any coordination or storage.
Pro Complex applications can easily be expressed through Nomad
Nomad uses a high-level abstraction of jobs. Jobs are essentially task groups (sets of tasks). Because of this, Nomad allows users to develop and manage complex applications easily, without having to think about the individual containers that make these applications.
Pro Easy to reason about
Nomad gives a lot of output and is intentionally kept simple. This makes maintenance easy and reduces downtimes.
Pro Big comapnies, like eBay and CircleCI use it
Cons
Con Only provides cluster management and scheduling
While other orchestration tools provide much more than just cluster management and scheduling (they also provide things like secrets management, discovery, monitoring, etc.), Nomad follows the Unix philosophy of doing only one thing and doing it well, providing only cluster management and scheduling.
