The Ruby equivalent of Fabric, Capistrano is a Ruby framework to configure and run deployment or system administration tasks on local or remote machines. It extends the Rake DSL to define tasks, and can group tasks by Roles.
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A simple, rack-based deployment framework
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Flexible operating-system event and metric forwarding agent. Receives input and forwards output using plugins.
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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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Marionette Collective (MCollective) is an orchestration framework built on top of Puppet. It can interact with a large number of servers (using a pub-sub middleware) and can execute jobs in parallel
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A Ruby Rake-like DSL for fast deployment and automation, similar to Capistrano but faster and lesser overhead, since it creates only a single SSH connection for a deploy
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Nagios Log Server greatly simplifies the process of searching your log data. Set up alerts to notify you when potential threats arise, or simply query your log data to quickly audit any system. With Nagios Log Server, you get all of your log data in one location, with high availability and fail-over built right in.
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Bootstrap a DevOps infrastructure with some opinionated defaults (vagrant, puppet, librarian-puppet, git, etc), standard development guidelines, etc. Makes it very quick to get a DevOps team up and running
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A model driven orchestration tool for deployment of application clusters
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