A simple wrapper script around DSH for Apache Cassandra.
Description
dsh restricts you to flat groups lists, cdsh wraps dsh to allow you to define your
clusters in a single YAML file (~/.cdsh by default), and then specify the hosts for remote
commands using arguments for cluster name, data-center, and rack.
Usage
usage: cdsh [-h] [-c CLUSTER] [-d DATA_CENTER] [-r RACK] [--config CONFIG]
[-P]
[args [args ...]]
A dsh wrapper for Cassandra
positional arguments:
args arguments to dsh
optional arguments:
-h, --help show this help message and exit
-c CLUSTER, --cluster CLUSTER
cluster name
-d DATA_CENTER, --data-center DATA_CENTER
data-center name
-r RACK, --rack RACK rack name(s)
--config CONFIG yaml configuration file
-P, --print-hosts output matching hosts (no command run)
-e EXCLUDES, --exclude EXCLUDES
hosts to exclude (glob)
Examples
Executing a command on all nodes of cluster default:
$ cdsh -c default -- uname -r
Executing a command on rack1 of cluster test in data-center datacenter1:
$ cdsh -c test -d datacenter1 -r rack1 -- nodetool setstreamthroughput 200
Using the host list for other commands:
$ for i in `cdsh -c default -P`; do rsync cassandra.yaml $i:/etc/cassandra; done
