bugsnag
Monitor everything you're building.
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collectd
A daemon that collects system performance statistics periodically, and provides tons of plugins to store and analyze these values
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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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Monit
An open source utility for managing and monitoring processes, programs, files, directories and filesystems
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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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Rollbar
Detect, diagnose and defeat errors.
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Sentry
Automate error tracking to find and fix issues before your users even experience a crash. Sentry is open-source, real-time, and loved by 100,000 developers around the world.
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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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Supervisord Monitor
Supervisord Monitor is multi server monitoring tool for supervisor - watch, start and stop all your supervisord instances and servvices from one place.
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Zabbix
An open source, enterprise-class monitoring framework
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Zipkin
A distributed request tracking system, useful for micro-service and distributed architectures written in Scala
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