May 2017
Beginner
300 pages
7h 26m
English
Content preview from Learning Docker - Second Edition
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Control groups
Linux containers rely on Control groups (cgroups), which not only track groups of processes, but also expose metrics of the CPU, memory, and block I/O usage. You can access these metrics and obtain network usage metrics as well. Cgroups are another important component of Linux containers. Cgroups have been around for a while and were initially merged into the Linux kernel code 2.6.24. They ensure that each Docker container will get a fixed amount of memory, CPU, and disk I/O, so that any container will not able to bring the host machine down at any point of time under any circumstances. Cgroups do not play a role in preventing one container from being accessed, but they are essential to fend off some Denial of Service (DoS ...
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