How to monitor CoreOS system and application resource, will Nagios work?

[Eric Zhang]

Hi, 

My company is starting to use CoreOS for some reasons.

Is there any tool can monitor CoreOS sytem and application resource? Basic, we need to set up RAM, CPU, DISK Usage and also, application, like APACHE, NGINX, PHP, JAVA or contains resources? We prefer Nagios to monitor because we already have that Monitoring system. 

Thanks for your help..

[anton....@coreos.com]

Hi Eric,

You have to run monitoring software in docker containers. In some cases it is necessary to run these containers with "--privileged=true" option. As for docker containers monitoring you can use https://github.com/google/cadvisor

Also you can try to look at Kubernetes. Kubernetes has built-in cAdvisor support and it monitors host state for cpu/memory usage and failures. https://coreos.com/kubernetes/docs/latest/getting-started.html

Let me know if you have any further questions.

Regards,

Anton

[Eric Zhang]

Thanks Anton,  very useful information. I will check it and come back to discuss more on it. 

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Eric Zhang 張超

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[Jason Cameron]

We are using Prometheus to monitor the metrics on cAdvisor (via Kubernetes) as well as running the Node Exporter for additional metrics to alert/monitor on.

http://prometheus.io

https://github.com/prometheus/alertmanager

https://github.com/prometheus/node_exporter

Just wanted to share