A modern, distributed monitoring system written in Go.
While there are a bunch of solutions for monitoring and alerting using time series data, there aren't many (or any?) modern solutions for 'regular'/'old-skool' remote monitoring similar to Nagios and Icinga.
9volt offers the following things out of the box:
etcdfor all configuration
9voltimmediately picks up the change)
./9volt cfg --help
./9volt server -e http://etcd-server-1.example.com:2379 -e http://etcd-server-2.example.com:2379 -e http://etcd-server-3.example.com:2379
9volt cfgfor managing configs
9voltto be managed by
upstartor some other process manager
9voltvia env vars
... or, if you prefer to do things via Docker, check out these docs.
9volt is incredibly simple. Launch another
9volt service on a separate host and point it to the same
etcd hosts as the main
9volt node will produce output similar to this when it detects a node join:
Checks will be automatically divided between the all
If one of the nodes were to go down, a new leader will be elected (if the node that went down was the previous leader) and checks will be redistributed among the remaining nodes.
This will produce output similar to this (and will be also available in the event stream via the API and UI):
API documentation can be found here.
Note In the minimum configuration, you could run both
etcd on the same node.
While you can manage 9volt alerter and monitor configs via the API, another approach to config management is to use the built-in config utility (
9volt cfg <flags>).
This utility allows you to scan a given directory for any YAML files that resemble 9volt configs (the file must contain either 'monitor' or 'alerter' sections) and it will automatically parse, validate and push them to your etcd server(s).
By default, the utility will keep your local configs in sync with your etcd server(s). In other words, if the utility comes across a config in etcd that does not exist locally (in config(s)), it will remove the config entry from etcd (and vice versa). This functionality can be turned off by flipping the
You can look at an example of a YAML based config here.
Read through the docs dir.
Got a suggestion/idea? Something that is preventing you from using
9volt over another monitoring system because of a missing feature? Submit an issue and we'll see what we can do!