It’s all about the… containers!

on YouTube ↗34m

" summary

Explains how to monitor system containers (LXC) and application containers (Docker/Rancher/Kubernetes) using Icinga 2 with check_lxc and check_rancher2. Shows LXC limits: host /proc hides real memory/CPU until lxcfs is mounted, so CPU needs cpuacct diff and memory must come from cgroups; offers check_lxc that reads cgroup memory/swap and warns about inaccurate "available" values. Describes a Rancher production run with >1000 containers and a frozen pod stuck in removing state discovered via the Rancher API and fixed with kubectl.

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" chapters (12)

1. 0:00Intro
2. 2:25That's a container
3. 3:58The world is not perfect
4. 7:44LXC - Linux Containers
5. 9:45LXC - Monitoring processes
6. 14:17LXC - Monitoring CPU usage
7. 18:49Application Containers (AC)
8. 20:51AC - Monitoring challenges
9. 22:20AC - Management w/ Rancher
10. 28:25AC - Using check rancher2
11. 31:06Application Containers - Recap
12. 32:41References and links

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