A visual stat tool for CrateDB clusters
Project description
cstat
A visual stat tool for CrateDB clusters.
cstat is ispired by the awesome interactive process monitoring tool htop. cstat should be a similar tool to iostat, but for monitoring CrateDB clusters.
Installation
Right now, stat is only available from Github. Therefore you need to checkout the repository and run pip install on the local directory.
git clone https://github.com/chaudum/crate-top.git cstat cd cstat python3.4 -m venv env source ./env/bin/activate pip install -e .
cstat requires Python 3.6 or greater and can connect to CrateDB 2.x.
Usage
After installation you can monitor CrateDB running on localhost with default configuration by invoking the following command:
>>> cstat --user crate
A full list of command line arguments are listed when invoking cstat with the --help argument:
>>> cstat --help usage: cstat [-h] [--host HOST] [--port PORT] [--interval INTERVAL] [--user USER] [--version] A visual stat tool for CrateDB clusters optional arguments: -h, --help show this help message and exit --host HOST, --crate-host HOST CrateDB host to connect to --port PORT, --psql-port PORT PSQL port of CrateDB host --interval INTERVAL, --refresh-interval INTERVAL amount of time in seconds between each update --user USER, --db-user USER database user --version show program's version number and exit
By default cstat connects to localhost on port 5432 if not otherwise specified.
Keyboard Shortcuts
0 … toggle cluster info
1 … show utilization for CPU, process, memory, heap and disk
2 … show I/O statistics for network and disk
3 … show aggregated query duration based on jobs_log
x … toggle nodes/aggregation view
f3 … enable/disable job logging (this also sets the stats.jobs_log cluster setting)
Known Issues
Small terminal sizes will raise CanvasErrors because of content overflow.
Todo
[x] display disk usage
[x] display disk i/o
[x] display network i/o
[x] display node names in detail views
[x] use asyncio to perform http requests
[x] coloring of i/o stats
[ ] responsive i/o widget
Changelog for cstat
Unreleased
0.2.0
Released on 2017/11/14 with the following changes:
Implemented asynchronous database access using aiopg which uses the Postgres Wire Protocol instead of the official CrateDB Python client which uses the HTTP protocol.
Added median, percentile 95, and percentile 99 to query stats table view.
Added --user/--db-user command line argument to support user authentication for clusters which run CrateDB 2.0 or greater.
Changed the toggle key for enabling/disabling query stats from F1 to F3, because in the Terminator terminal the F1 key is reserved for “help”.
Pre-calculate used and idle CPU in SQL statement to avoid rounding issues that can cause an display overflow in CPU widget.
0.1.0
Initial release on 2017/03/30:
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