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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Errbit
An open source, self-hosted error catching tool, which can collect and manage errors from other applications. It is compatible with the Airbrake API and can be used as a drop-in replacement.
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FastForward
Flexible operating-system event and metric forwarding agent. Receives input and forwards output using plugins.
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Fig
A package management tool, similar to Ivy/APT, but language agnostic, faster and works well with both executables and libraries.
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FnordMetric
A HTML5/Javascript API for collecting and visualizing time series data
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Monigusto
A collection of Chef recipes to install various monitoring tools (such as sensu, statsd, etc). Makes it a breeze to get a monitoring infrastructure up and running
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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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Orc
A model driven orchestration tool for deployment of application clusters
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Puppet Dashboard
A web interface for Puppet. It can view and analyze Puppet reports, assign Puppet classes and parameters to nodes, view inventory data and backed-up file contents, etc.
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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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Statman
Statman makes it possible to instrument and collect statistics from your high-traffic production Erlang systems with very low overhead. The collected data points are aggregated in the VM and can be sent to services like Graphite, Munin, New Relic, etc.
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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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Vagrant Cachier
A Vagrant plugin that helps you reduce the amount of coffee you drink while waiting for boxes to be provisioned by sharing a common package cache among similiar VM instances.
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Veewee
veewee is a great tool for building Virtual Machine images (aka base boxes). It automates most of the steps and allows you to easily create readymade images for VirtualBox/Vagrant, VMWare Fusion, KVM and Parallels. No longer need to shy away from building custom VM images!
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Zipkin
A distributed request tracking system, useful for micro-service and distributed architectures written in Scala
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