Package org.apache.druid.java.util.metrics.cgroups

Class ProcSelfCgroupDiscoverer

java.lang.Object

org.apache.druid.java.util.metrics.cgroups.ProcSelfCgroupDiscoverer

All Implemented Interfaces:

CgroupDiscoverer

public class ProcSelfCgroupDiscoverer
extends Object
implements CgroupDiscoverer

Constructor Summary

Constructors

Constructor	Description
ProcSelfCgroupDiscoverer()
ProcSelfCgroupDiscoverer(Class<? extends CgroupDiscoverer> discoverer)

Method Summary

Modifier and Type	Method	Description
static CgroupDiscoverer	autoCgroupDiscoverer()
static CgroupDiscoverer	autoCgroupDiscoverer(Path procPidDir)	Creates the appropriate CgroupDiscoverer based on the cgroups version detected in the system.
Path	discover(String cgroup)	Returns a path for a specific cgroup.
CgroupVersion	getCgroupVersion()
Cpu.CpuMetrics	getCpuMetrics()	Gets CPU metrics (shares, quota, period, usage) appropriate for this cgroups version.
CpuSet.CpuSetMetric	getCpuSetMetrics()	Gets CPU set metrics (effective CPU list) appropriate for this cgroups version.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

ProcSelfCgroupDiscoverer

public ProcSelfCgroupDiscoverer()

ProcSelfCgroupDiscoverer

public ProcSelfCgroupDiscoverer(Class<? extends CgroupDiscoverer> discoverer)

Method Details

autoCgroupDiscoverer

public static CgroupDiscoverer autoCgroupDiscoverer()

discover

public Path discover(String cgroup)

Description copied from interface: CgroupDiscoverer

Returns a path for a specific cgroup. This path should contain the interesting cgroup files without further traversing needed.

Specified by:

discover in interface CgroupDiscoverer

Parameters:

cgroup - The cgroup

Returns:

The path that contains that cgroup's interesting bits.

getCpuMetrics

public Cpu.CpuMetrics getCpuMetrics()

Description copied from interface: CgroupDiscoverer

Gets CPU metrics (shares, quota, period, usage) appropriate for this cgroups version. Encapsulates the difference between v1 (cpu.shares, cpu.cfs_*) and v2 (cpu.weight, cpu.max).

Specified by:

getCpuMetrics in interface CgroupDiscoverer

Returns:

CPU metrics compatible with both cgroups v1 and v2

getCpuSetMetrics

public CpuSet.CpuSetMetric getCpuSetMetrics()

Description copied from interface: CgroupDiscoverer

Gets CPU set metrics (effective CPU list) appropriate for this cgroups version. Encapsulates the difference between v1 (cpuset.effective_cpus) and v2 (cpuset.cpus.effective).

Specified by:

getCpuSetMetrics in interface CgroupDiscoverer

Returns:

CPU set metrics compatible with both cgroups v1 and v2

getCgroupVersion

public CgroupVersion getCgroupVersion()

Specified by:

getCgroupVersion in interface CgroupDiscoverer

autoCgroupDiscoverer

public static CgroupDiscoverer autoCgroupDiscoverer(Path procPidDir)

Creates the appropriate CgroupDiscoverer based on the cgroups version detected in the system.