procfs

package module
v0.8.1 Latest Latest
Warning

This package is not in the latest version of its module.

 Go to latest Published: Jan 28, 2017 License: Apache-2.0 Imports: 14 Imported by: 3

README

procfs

This procfs package provides functions to retrieve system, kernel and process metrics from the pseudo-filesystem proc.

WARNING: This package is a work in progress. Its API may still break in backwards-incompatible ways without warnings. Use it at your own risk.

GoDoc Build Status

Documentation

Overview

Package procfs provides functions to retrieve system, kernel and process metrics from the pseudo-filesystem proc.

Example: 

package main

import (
	"fmt"
	"log"

	"github.com/prometheus/procfs"
)

func main() {
	p, err := procfs.Self()
	if err != nil {
		log.Fatalf("could not get process: %s", err)
	}

	stat, err := p.NewStat()
	if err != nil {
		log.Fatalf("could not get process stat: %s", err)
	}

	fmt.Printf("command:  %s\n", stat.Comm)
	fmt.Printf("cpu time: %fs\n", stat.CPUTime())
	fmt.Printf("vsize:    %dB\n", stat.VirtualMemory())
	fmt.Printf("rss:      %dB\n", stat.ResidentMemory())
}

Index

Constants

View Source 
const DefaultMountPoint = "/proc"

DefaultMountPoint is the common mount point of the proc filesystem.

Variables

This section is empty.

Functions

This section is empty.

Types

type FS 

type FS string

FS represents the pseudo-filesystem proc, which provides an interface to kernel data structures.

func NewFS 

func NewFS(mountPoint string) (FS, error)

NewFS returns a new FS mounted under the given mountPoint. It will error if the mount point can't be read.

func (FS) AllProcs 

func (fs FS) AllProcs() (Procs, error)

AllProcs returns a list of all currently available processes.

func (FS) NewIPVSBackendStatus 

func (fs FS) NewIPVSBackendStatus() ([]IPVSBackendStatus, error)

NewIPVSBackendStatus reads and returns the status of all (virtual,real) server pairs from the specified `proc` filesystem.

func (FS) NewIPVSStats 

func (fs FS) NewIPVSStats() (IPVSStats, error)

NewIPVSStats reads the IPVS statistics from the specified `proc` filesystem.

func (FS) NewProc 

func (fs FS) NewProc(pid int) (Proc, error)

NewProc returns a process for the given pid.

func (FS) NewStat 

func (fs FS) NewStat() (Stat, error)

NewStat returns an information about current kernel/system statistics.

func (FS) ParseMDStat 

func (fs FS) ParseMDStat() (mdstates []MDStat, err error)

ParseMDStat parses an mdstat-file and returns a struct with the relevant infos.

func (FS) Path 

func (fs FS) Path(p ...string) string

Path returns the path of the given subsystem relative to the procfs root.

func (FS) Self 

func (fs FS) Self() (Proc, error)

Self returns a process for the current process.

type IPVSBackendStatus 

type IPVSBackendStatus struct {
	// The local (virtual) IP address.
	LocalAddress net.IP
	// The local (virtual) port.
	LocalPort uint16
	// The transport protocol (TCP, UDP).
	Proto string
	// The remote (real) IP address.
	RemoteAddress net.IP
	// The remote (real) port.
	RemotePort uint16
	// The current number of active connections for this virtual/real address pair.
	ActiveConn uint64
	// The current number of inactive connections for this virtual/real address pair.
	InactConn uint64
	// The current weight of this virtual/real address pair.
	Weight uint64
}

IPVSBackendStatus holds current metrics of one virtual / real address pair.

func NewIPVSBackendStatus 

func NewIPVSBackendStatus() ([]IPVSBackendStatus, error)

NewIPVSBackendStatus reads and returns the status of all (virtual,real) server pairs.

type IPVSStats 

type IPVSStats struct {
	// Total count of connections.
	Connections uint64
	// Total incoming packages processed.
	IncomingPackets uint64
	// Total outgoing packages processed.
	OutgoingPackets uint64
	// Total incoming traffic.
	IncomingBytes uint64
	// Total outgoing traffic.
	OutgoingBytes uint64
}

IPVSStats holds IPVS statistics, as exposed by the kernel in `/proc/net/ip_vs_stats`.

func NewIPVSStats 

func NewIPVSStats() (IPVSStats, error)

NewIPVSStats reads the IPVS statistics.

type MDStat 

type MDStat struct {
	// Name of the device.
	Name string
	// activity-state of the device.
	ActivityState string
	// Number of active disks.
	DisksActive int64
	// Total number of disks the device consists of.
	DisksTotal int64
	// Number of blocks the device holds.
	BlocksTotal int64
	// Number of blocks on the device that are in sync.
	BlocksSynced int64
}

MDStat holds info parsed from /proc/mdstat.

type Mount 

type Mount struct {
	// Name of the device.
	Device string
	// The mount point of the device.
	Mount string
	// The filesystem type used by the device.
	Type string
	// If available additional statistics related to this Mount.
	// Use a type assertion to determine if additional statistics are available.
	Stats MountStats
}

A Mount is a device mount parsed from /proc/[pid]/mountstats.

type MountStats 

type MountStats interface {
	// contains filtered or unexported methods
}

A MountStats is a type which contains detailed statistics for a specific type of Mount.

type MountStatsNFS 

type MountStatsNFS struct {
	// The version of statistics provided.
	StatVersion string
	// The age of the NFS mount.
	Age time.Duration
	// Statistics related to byte counters for various operations.
	Bytes NFSBytesStats
	// Statistics related to various NFS event occurrences.
	Events NFSEventsStats
	// Statistics broken down by filesystem operation.
	Operations []NFSOperationStats
	// Statistics about the NFS RPC transport.
	Transport NFSTransportStats
}

A MountStatsNFS is a MountStats implementation for NFSv3 and v4 mounts.

type NFSBytesStats 

type NFSBytesStats struct {
	// Number of bytes read using the read() syscall.
	Read uint64
	// Number of bytes written using the write() syscall.
	Write uint64
	// Number of bytes read using the read() syscall in O_DIRECT mode.
	DirectRead uint64
	// Number of bytes written using the write() syscall in O_DIRECT mode.
	DirectWrite uint64
	// Number of bytes read from the NFS server, in total.
	ReadTotal uint64
	// Number of bytes written to the NFS server, in total.
	WriteTotal uint64
	// Number of pages read directly via mmap()'d files.
	ReadPages uint64
	// Number of pages written directly via mmap()'d files.
	WritePages uint64
}

A NFSBytesStats contains statistics about the number of bytes read and written by an NFS client to and from an NFS server.

type NFSEventsStats 

type NFSEventsStats struct {
	// Number of times cached inode attributes are re-validated from the server.
	InodeRevalidate uint64
	// Number of times cached dentry nodes are re-validated from the server.
	DnodeRevalidate uint64
	// Number of times an inode cache is cleared.
	DataInvalidate uint64
	// Number of times cached inode attributes are invalidated.
	AttributeInvalidate uint64
	// Number of times files or directories have been open()'d.
	VFSOpen uint64
	// Number of times a directory lookup has occurred.
	VFSLookup uint64
	// Number of times permissions have been checked.
	VFSAccess uint64
	// Number of updates (and potential writes) to pages.
	VFSUpdatePage uint64
	// Number of pages read directly via mmap()'d files.
	VFSReadPage uint64
	// Number of times a group of pages have been read.
	VFSReadPages uint64
	// Number of pages written directly via mmap()'d files.
	VFSWritePage uint64
	// Number of times a group of pages have been written.
	VFSWritePages uint64
	// Number of times directory entries have been read with getdents().
	VFSGetdents uint64
	// Number of times attributes have been set on inodes.
	VFSSetattr uint64
	// Number of pending writes that have been forcefully flushed to the server.
	VFSFlush uint64
	// Number of times fsync() has been called on directories and files.
	VFSFsync uint64
	// Number of times locking has been attemped on a file.
	VFSLock uint64
	// Number of times files have been closed and released.
	VFSFileRelease uint64
	// Unknown.  Possibly unused.
	CongestionWait uint64
	// Number of times files have been truncated.
	Truncation uint64
	// Number of times a file has been grown due to writes beyond its existing end.
	WriteExtension uint64
	// Number of times a file was removed while still open by another process.
	SillyRename uint64
	// Number of times the NFS server gave less data than expected while reading.
	ShortRead uint64
	// Number of times the NFS server wrote less data than expected while writing.
	ShortWrite uint64
	// Number of times the NFS server indicated EJUKEBOX; retrieving data from
	// offline storage.
	JukeboxDelay uint64
	// Number of NFS v4.1+ pNFS reads.
	PNFSRead uint64
	// Number of NFS v4.1+ pNFS writes.
	PNFSWrite uint64
}

A NFSEventsStats contains statistics about NFS event occurrences.

type NFSOperationStats 

type NFSOperationStats struct {
	// The name of the operation.
	Operation string
	// Number of requests performed for this operation.
	Requests uint64
	// Number of times an actual RPC request has been transmitted for this operation.
	Transmissions uint64
	// Number of times a request has had a major timeout.
	MajorTimeouts uint64
	// Number of bytes sent for this operation, including RPC headers and payload.
	BytesSent uint64
	// Number of bytes received for this operation, including RPC headers and payload.
	BytesReceived uint64
	// Duration all requests spent queued for transmission before they were sent.
	CumulativeQueueTime time.Duration
	// Duration it took to get a reply back after the request was transmitted.
	CumulativeTotalResponseTime time.Duration
	// Duration from when a request was enqueued to when it was completely handled.
	CumulativeTotalRequestTime time.Duration
}

A NFSOperationStats contains statistics for a single operation.

type NFSTransportStats 

type NFSTransportStats struct {
	// The local port used for the NFS mount.
	Port uint64
	// Number of times the client has had to establish a connection from scratch
	// to the NFS server.
	Bind uint64
	// Number of times the client has made a TCP connection to the NFS server.
	Connect uint64
	// Duration (in jiffies, a kernel internal unit of time) the NFS mount has
	// spent waiting for connections to the server to be established.
	ConnectIdleTime uint64
	// Duration since the NFS mount last saw any RPC traffic.
	IdleTime time.Duration
	// Number of RPC requests for this mount sent to the NFS server.
	Sends uint64
	// Number of RPC responses for this mount received from the NFS server.
	Receives uint64
	// Number of times the NFS server sent a response with a transaction ID
	// unknown to this client.
	BadTransactionIDs uint64
	// A running counter, incremented on each request as the current difference
	// ebetween sends and receives.
	CumulativeActiveRequests uint64
	// A running counter, incremented on each request by the current backlog
	// queue size.
	CumulativeBacklog uint64

	// Maximum number of simultaneously active RPC requests ever used.
	MaximumRPCSlotsUsed uint64
	// A running counter, incremented on each request as the current size of the
	// sending queue.
	CumulativeSendingQueue uint64
	// A running counter, incremented on each request as the current size of the
	// pending queue.
	CumulativePendingQueue uint64
}

A NFSTransportStats contains statistics for the NFS mount RPC requests and responses.

type Proc 

type Proc struct {
	// The process ID.
	PID int
	// contains filtered or unexported fields
}

Proc provides information about a running process.

func NewProc 

func NewProc(pid int) (Proc, error)

NewProc returns a process for the given pid under /proc.

func Self 

func Self() (Proc, error)

Self returns a process for the current process read via /proc/self.

func (Proc) CmdLine 

func (p Proc) CmdLine() ([]string, error)

CmdLine returns the command line of a process.

func (Proc) Comm 

func (p Proc) Comm() (string, error)

Comm returns the command name of a process.

func (Proc) Executable 

func (p Proc) Executable() (string, error)

Executable returns the absolute path of the executable command of a process.

func (Proc) FileDescriptorTargets 

func (p Proc) FileDescriptorTargets() ([]string, error)

FileDescriptorTargets returns the targets of all file descriptors of a process. If a file descriptor is not a symlink to a file (like a socket), that value will be the empty string.

func (Proc) FileDescriptors 

func (p Proc) FileDescriptors() ([]uintptr, error)

FileDescriptors returns the currently open file descriptors of a process.

func (Proc) FileDescriptorsLen 

func (p Proc) FileDescriptorsLen() (int, error)

FileDescriptorsLen returns the number of currently open file descriptors of a process.

func (Proc) MountStats 

func (p Proc) MountStats() ([]*Mount, error)

MountStats retrieves statistics and configuration for mount points in a process's namespace.

func (Proc) NewIO 

func (p Proc) NewIO() (ProcIO, error)

NewIO creates a new ProcIO instance from a given Proc instance.

func (Proc) NewLimits 

func (p Proc) NewLimits() (ProcLimits, error)

NewLimits returns the current soft limits of the process.

func (Proc) NewStat 

func (p Proc) NewStat() (ProcStat, error)

NewStat returns the current status information of the process.

type ProcIO 

type ProcIO struct {
	// Chars read.
	RChar uint64
	// Chars written.
	WChar uint64
	// Read syscalls.
	SyscR uint64
	// Write syscalls.
	SyscW uint64
	// Bytes read.
	ReadBytes uint64
	// Bytes written.
	WriteBytes uint64
	// Bytes written, but taking into account truncation. See
	// Documentation/filesystems/proc.txt in the kernel sources for
	// detailed explanation.
	CancelledWriteBytes int64
}

ProcIO models the content of /proc/<pid>/io.

type ProcLimits 

type ProcLimits struct {
	// CPU time limit in seconds.
	CPUTime int
	// Maximum size of files that the process may create.
	FileSize int
	// Maximum size of the process's data segment (initialized data,
	// uninitialized data, and heap).
	DataSize int
	// Maximum size of the process stack in bytes.
	StackSize int
	// Maximum size of a core file.
	CoreFileSize int
	// Limit of the process's resident set in pages.
	ResidentSet int
	// Maximum number of processes that can be created for the real user ID of
	// the calling process.
	Processes int
	// Value one greater than the maximum file descriptor number that can be
	// opened by this process.
	OpenFiles int
	// Maximum number of bytes of memory that may be locked into RAM.
	LockedMemory int
	// Maximum size of the process's virtual memory address space in bytes.
	AddressSpace int
	// Limit on the combined number of flock(2) locks and fcntl(2) leases that
	// this process may establish.
	FileLocks int
	// Limit of signals that may be queued for the real user ID of the calling
	// process.
	PendingSignals int
	// Limit on the number of bytes that can be allocated for POSIX message
	// queues for the real user ID of the calling process.
	MsqqueueSize int
	// Limit of the nice priority set using setpriority(2) or nice(2).
	NicePriority int
	// Limit of the real-time priority set using sched_setscheduler(2) or
	// sched_setparam(2).
	RealtimePriority int
	// Limit (in microseconds) on the amount of CPU time that a process
	// scheduled under a real-time scheduling policy may consume without making
	// a blocking system call.
	RealtimeTimeout int
}

ProcLimits represents the soft limits for each of the process's resource limits. For more information see getrlimit(2): http://man7.org/linux/man-pages/man2/getrlimit.2.html.

type ProcStat 

type ProcStat struct {
	// The process ID.
	PID int
	// The filename of the executable.
	Comm string
	// The process state.
	State string
	// The PID of the parent of this process.
	PPID int
	// The process group ID of the process.
	PGRP int
	// The session ID of the process.
	Session int
	// The controlling terminal of the process.
	TTY int
	// The ID of the foreground process group of the controlling terminal of
	// the process.
	TPGID int
	// The kernel flags word of the process.
	Flags uint
	// The number of minor faults the process has made which have not required
	// loading a memory page from disk.
	MinFlt uint
	// The number of minor faults that the process's waited-for children have
	// made.
	CMinFlt uint
	// The number of major faults the process has made which have required
	// loading a memory page from disk.
	MajFlt uint
	// The number of major faults that the process's waited-for children have
	// made.
	CMajFlt uint
	// Amount of time that this process has been scheduled in user mode,
	// measured in clock ticks.
	UTime uint
	// Amount of time that this process has been scheduled in kernel mode,
	// measured in clock ticks.
	STime uint
	// Amount of time that this process's waited-for children have been
	// scheduled in user mode, measured in clock ticks.
	CUTime uint
	// Amount of time that this process's waited-for children have been
	// scheduled in kernel mode, measured in clock ticks.
	CSTime uint
	// For processes running a real-time scheduling policy, this is the negated
	// scheduling priority, minus one.
	Priority int
	// The nice value, a value in the range 19 (low priority) to -20 (high
	// priority).
	Nice int
	// Number of threads in this process.
	NumThreads int
	// The time the process started after system boot, the value is expressed
	// in clock ticks.
	Starttime uint64
	// Virtual memory size in bytes.
	VSize int
	// Resident set size in pages.
	RSS int
	// contains filtered or unexported fields
}

ProcStat provides status information about the process, read from /proc/[pid]/stat.

func (ProcStat) CPUTime 

func (s ProcStat) CPUTime() float64

CPUTime returns the total CPU user and system time in seconds.

func (ProcStat) ResidentMemory 

func (s ProcStat) ResidentMemory() int

ResidentMemory returns the resident memory size in bytes.

func (ProcStat) StartTime 

func (s ProcStat) StartTime() (float64, error)

StartTime returns the unix timestamp of the process in seconds.

func (ProcStat) VirtualMemory 

func (s ProcStat) VirtualMemory() int

VirtualMemory returns the virtual memory size in bytes.

type Procs 

type Procs []Proc

Procs represents a list of Proc structs.

func AllProcs 

func AllProcs() (Procs, error)

AllProcs returns a list of all currently available processes under /proc.

func (Procs) Len 

func (p Procs) Len() int

func (Procs) Less 

func (p Procs) Less(i, j int) bool

func (Procs) Swap 

func (p Procs) Swap(i, j int)

type Stat 

type Stat struct {
	// Boot time in seconds since the Epoch.
	BootTime int64
}

Stat represents kernel/system statistics.

func NewStat 

func NewStat() (Stat, error)

NewStat returns kernel/system statistics read from /proc/stat.

Source Files

View all Source files

Jump to

Keyboard shortcuts

? : This menu
/ : Search site
f or F : Jump to
y or Y : Canonical URL
go.dev uses cookies from Google to deliver and enhance the quality of its services and to analyze traffic. Learn more.