cryptoe opened a new pull request, #18705:
URL: https://github.com/apache/druid/pull/18705
## Summary
This PR introduces auto-switching cgroup monitors that can dynamically
detect and switch between cgroup v1 and v2 implementations, along with
necessary code style fixes.
### Changes
-Now CgroupCpuMonitor , CgroupCpuSetMonitor , CgroupDiskMonitor
,MemoryMonitor autoswitch to cgroups v2 and no longer fail in case cgroups v2
is detected.
- All cgroupMetrics now emit a dimension 'cgroupversion" to understand which
cgroup version was chosen
- CgroupV2CpuMonitor also emits : `cgroup/cpu/shares` and
`cgroup/cpu/cores_quota`
#### Test Plan
- All existing cgroup monitor tests updated to work with auto-switching
logic
- New comprehensive test suites added for cgroup v2 implementations
- Tests verify correct detection and switching between cgroup versions
- Tested on a cluster.
This enhancement allows Druid to seamlessly work across different
containerization environments that use either cgroup v1 or v2, improving
compatibility and reducing configuration overhead.
### Release notes
- Now CgroupCpuMonitor , CgroupCpuSetMonitor , CgroupDiskMonitor
,MemoryMonitor autoswitch to cgroups v2 and no longer fail in case cgroups v2
is detected.
- "CpuAcctDeltaMonitor" fails gracefully incase cgroups v2 is detected
- All cgroupMetrics now emit a dimension 'cgroupversion" to understand which
cgroup version was chosen
- "CgroupV2CpuMonitor" also emits : `cgroup/cpu/shares` and
`cgroup/cpu/cores_quota`
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