grange-server

grange-server

A read-only range server frontend to grange. See there for documentation of concepts and query language.

Cluster and group data is specified in YAML files.

Installation

1. Setup your go environment if needed

    mkdir $HOME/go
    export GOPATH=$HOME/go
   

2. Install grange-server and erg client

    go get -v -u github.com/square/grange-server
    go get -v -u github.com/square/erg
   

Usage

Put some range YAML files in clusters/, then:

$GOPATH/bin/grange-server --port=8888 $GOPATH/src/github.com/square/grange-server/grange.gcfg

Simple expansion (with erg client):

erg -v 1..2

Find all clusters that have type key set to "mysql":

erg -v '%{has(TYPE;mysql)}'

Features

• Read-only serving of cluster YAML files on disk.
• -parse option to dry-run parse source files and not start the server. Will return non-zero exit code if any warnings were emitted.
• Reloads configuration file in response to HUP signal. Allows dynamic log level and cluster changes.
• Can report HTTP response metrics to statsd.

Format

See the clusters directory for sample YAML files. At minimum, your directory should contain a GROUPS.yaml. See grange.gcfg for a sample configuration.