Consul
Consul makes it simple for services to register themselves and to discover other services via a DNS or HTTP interface. Register external services such as SaaS providers as well
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Instrumental
Instrumental is a real-time, high-scale application and server monitoring tool with intelligent alerts, a powerful query language, and free development accounts.
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Nomad
Nomad is a lightweight workload orchestrator. It offers client instance scaling as well as workload scaling.
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Serf
Serf is a service discovery and orchestration tool which is highly decentralized, highly available, fault tolerant, cross platform and extremely lightweight.
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Zipkin
A distributed request tracking system, useful for micro-service and distributed architectures written in Scala
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