Collect task resource usage in mesos

This is collectd plugin and docker image to collect resource usage from mesos tasks. Resource usage collected from mesos slaves and sent to graphite installation.

You have to add collectd_app label with the application name to your tasks to make it visible in graphite. Marathon 0.8.0+ and mesos 0.22+ support that.

Also make sure to check out docker image to collect metrics from masters and slaves: collectd-mesos.

Caveats

Mesos has an open issue about incorrect CPU metrics. If you run programs that fork and die from time to time, you would probably run into this issue. Check out collectd-docker if you run docker containers, it produces accurate and detailed metrics.

Reported metrics

Metric names look like this:

collectd.<host>.mesos-tasks.<app>.<task>.<type>.<metric>

Gauges:

• cpus_limit
• cpus_system_time_secs
• cpus_user_time_secs
• mem_limit_bytes
• mem_rss_bytes

Grafana dashboard

Grafana 2 dashboard is included, you can change mesos apps and switch to individual tasks to see resource usage.

Graphite metrics extracted from the dashboard

CPU usage per task

• Limit

alias(averageSeries(collectd.*.mesos-tasks.$app.$task.gauge.cpus_limit), 'limit')

• Per task usage

aliasByNode(scaleToSeconds(sumSeriesWithWildcards(derivative(collectd.*.mesos-tasks.$app.$task.gauge.cpus_{user,system}_time_secs), 1, 6), 1), 4)

CPU usage by type

• System

alias(sumSeriesWithWildcards(scaleToSeconds(derivative(collectd.*.mesos-tasks.$app.$task.gauge.cpus_system_time_secs), 1), 1, 4), 'system')

• User

alias(sumSeriesWithWildcards(scaleToSeconds(derivative(collectd.*.mesos-tasks.$app.$task.gauge.cpus_user_time_secs), 1), 1, 4), 'user')

Memory usage per task

• Limit

alias(averageSeries(collectd.*.mesos-tasks.$app.$task.gauge.mem_limit_bytes), 'limit')

• Per task usage in bytes

aliasByNode(collectd.*.mesos-tasks.$app.$task.gauge.mem_rss_bytes, 4)

Memory usage percent per task

• Limit (hidden)

alias(averageSeries(collectd.*.mesos-tasks.$app.$task.gauge.mem_limit_bytes), 'limit')

• Per task usage percent

aliasByNode(asPercent(collectd.*.mesos-tasks.$app.$task.gauge.mem_rss_bytes, #A), 4)

Running

Minimal command:

docker run -d -e GRAPHITE_HOST=<graphite host> -e MESOS_HOST=<mesos host> \
    bobrik/collectd-mesos-tasks

Environment variables

• COLLECTD_HOST - host to use in metric name, defaults to the value of MESOS_HOST.
• COLLECTD_INTERVAL - metric update interval in seconds, defaults to 10.
• GRAPHITE_HOST - host where carbon is listening for data.
• GRAPHITE_PORT - port where carbon is listening for data, 2003 by default.
• GRAPHITE_PREFIX - prefix for metrics in graphite, collectd. by default.
• MESOS_HOST - mesos slave host to monitor.
• MESOS_PORT - mesos slave port number, defaults to 5051.

Note that this docker image is very minimal and libc inside does not support search directive in /etc/resolv.conf. You have to supply full hostname in MESOS_HOST that can be resolved with nameserver.

License

MIT