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grafana-pro
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===========
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This is very much a Work in Progess. The architecture and organisation has changed many times and I am not very happy
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with the current structure and architecture. I started with a lot of unit tests and drove the design though that in
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the begining, but then having changed the code and structure (and web framework libs, and database) I sort of
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abandoned them. When the architecture is getting more stable I will write & require more unit & integration tests.
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# Architecture
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I have researched a lot of go projects, found very few with a nice modular & loosly coupled archictecture. Go projects
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organize code very differently, some treat packages as global singletons (which reads nicely and is nice to work with
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but seems like a bad practice). I do miss generics for doing strongly typed but loosley coupled command/query style
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internal buss messaging.
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The biggest challange for architecture is making Grafana Pro very modular in a way that all/most components can
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run inproc or in seperate process (usefull when running Grafana Pro in a large scale SaaS setup). Been investigating
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using ZeroMQ or NanoMsg to handle module communication (Both ZeroMQ and NanoMsg can handle inproc & tcp which a number of
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different topologies). Running Grafana Pro in a SaaS setup might warrant that the alerting stuff runs out of proc on
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other servers feeding of a queue for example, but for simple on prem stuff it would be cool if that could be run in the
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same process. I am also thinking that some stuff might need swapping out/in depending on the setup (plugin model or just
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interfaces with different implementations).
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# Building
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* Just added a simple make file (the main binary package is in pkg/cmd/grafana-pro)
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* Need to change to godep or some go lang dependency management system
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# Data access
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Data access is very strange right now, instead of an interface I tried using public methods in the models package.
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These method pointers are assigned in when the sqlstore is initialized in pkg/store/sqlstore. This is probably a
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bad idea. I am thinking about either moving to simple interfaces. But I do not want a giant interface for all
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data acess. Would much prefe a simple generic command/query interface but golang lacks generics which makes this
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painful. But a generic command/query interface could still be good as it would make it easier to have some commands or
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queries handled buy out of proc components (or inproc if we used someting like ZeroMQ for communication). Or it
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could be overengineering thinking like this.
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# Grafana frontend
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The grafana frontend is added as git submodule in order to easily sync with upstream grafana.
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There should be a symbolic link from ./grafana/src to ./public . Need to add this to the Makefile.
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# TODO
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* Add symbolik link between ./grafana/src ./public
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* Hash & Salt password
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* Unit tests for data access
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* I switched recently from rethinkdb to sql (using a simple mini ORM lib called xorm, might need to switch to a more
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popular ORM lib).
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