GetTotalMemory returns either the total system memory or if possible the cgroups available memory.

GetTotalMemoryWithoutLogging is the same as GetTotalMemory, but returns any warning as a string instead of logging it.

NewHealthChecker creates a new health checker that emits alerts whenever the given metrics are nonzero.

NewMetricsRecorder initializes a new MetricsRecorder object that uses the given clock.

NewRuntimeStatSampler constructs a new RuntimeStatSampler object.

A HealthChecker inspects the node metrics and optionally a NodeStatus for anomalous conditions that the operator should be alerted to.

MetricsRecorder is used to periodically record the information in a number of metric registries.

RuntimeStatSampler is used to periodically sample the runtime environment for useful statistics, performing some rudimentary calculations and storing the resulting information in a format that can be easily consumed by status logging systems.