balena-supervisor/gosuper/vendor/github.com/shirou/gopsutil

gopsutil: psutil for golang

This is a port of psutil (http://pythonhosted.org/psutil/). The challenge is porting all psutil functions on some architectures.

Breaking Changes! golang 1.8 is required

After v2.17.04, golang 1.8 is required to build.

Tag semantics

gopsutil tag policy is almost same as Semantic Versioning, but automatically increase like Ubuntu versioning.

for example, v2.17.04 means

• v2: major version
• 17: release year, 2017
• 04: release month

gopsutil aims to keep backwards-compatiblity until major version change.

Taged at every end of month, but there are only a few commits, it can be skipped.

Available Architectures

• FreeBSD i386/amd64/arm
• Linux i386/amd64/arm(raspberry pi)
• Windows/amd64
• Darwin i386/amd64
• OpenBDS amd64 (Thank you @mpfz0r!)
• Solaris amd64 (developed and tested on SmartOS/Illumos, Thank you @jen20!)

All works are implemented without cgo by porting c struct to golang struct.

Usage

Note: gopsutil v2 breaks compatibility. If you want to stay with compatibility, please use v1 branch and vendoring.

package main

import (
    "fmt"

    "github.com/shirou/gopsutil/mem"
)

func main() {
    v, _ := mem.VirtualMemory()

    // almost every return value is a struct
    fmt.Printf("Total: %v, Free:%v, UsedPercent:%f%%\n", v.Total, v.Free, v.UsedPercent)

    // convert to JSON. String() is also implemented
    fmt.Println(v)
}

The output is below.

Total: 3179569152, Free:284233728, UsedPercent:84.508194%
{"total":3179569152,"available":492572672,"used":2895335424,"usedPercent":84.50819439828305, (snip...)}

You can set an alternative location to /proc by setting the HOST_PROC environment variable.

You can set an alternative location to /sys by setting the HOST_SYS environment variable.

You can set an alternative location to /etc by setting the HOST_ETC environment variable.

Documentation

see http://godoc.org/github.com/shirou/gopsutil

Requirements

• go1.5 or above is required.

More Info

Several methods have been added which are not present in psutil, but will provide useful information.

• host/HostInfo() (linux)
  • Hostname
  • Uptime
  • Procs
  • OS (ex: "linux")
  • Platform (ex: "ubuntu", "arch")
  • PlatformFamily (ex: "debian")
  • PlatformVersion (ex: "Ubuntu 13.10")
  • VirtualizationSystem (ex: "LXC")
  • VirtualizationRole (ex: "guest"/"host")
• cpu/CPUInfo() (linux, freebsd)
  • CPU (ex: 0, 1, ...)
  • VendorID (ex: "GenuineIntel")
  • Family
  • Model
  • Stepping
  • PhysicalID
  • CoreID
  • Cores (ex: 2)
  • ModelName (ex: "Intel(R) Core(TM) i7-2640M CPU @ 2.80GHz")
  • Mhz
  • CacheSize
  • Flags (ex: "fpu vme de pse tsc msr pae mce cx8 ...")
  • Microcode
• load/LoadAvg() (linux, freebsd)
  • Load1
  • Load5
  • Load15
• docker/GetDockerIDList() (linux only)
  • container id list ([]string)
• docker/CgroupCPU() (linux only)
  • user
  • system
• docker/CgroupMem() (linux only)
  • various status
• net_protocols (linux only)
  • system wide stats on network protocols (i.e IP, TCP, UDP, etc.)
  • sourced from /proc/net/snmp
• iptables nf_conntrack (linux only)
  • system wide stats on netfilter conntrack module
  • sourced from /proc/sys/net/netfilter/nf_conntrack_count

Some codes are ported from Ohai. many thanks.

Current Status

• x: work
• b: almost works, but something is broken

name cpu_times cpu_count cpu_percent cpu_times_percent	Linux x x x x	FreeBSD x x x x	OpenBSD x x x x	MacOSX x x x x	Windows x x x x	Solaris
virtual_memory swap_memory disk_partitions disk_io_counters disk_usage net_io_counters boot_time users pids pid_exists net_connections net_protocols net_if_addrs net_if_stats netfilter_conntrack =================== Process class name pid ppid name cmdline create_time status cwd exe uids gids terminal io_counters nice num_fds num_ctx_switches num_threads cpu_times memory_info memory_info_ex memory_maps open_files send_signal suspend resume terminate kill username ionice rlimit num_handlres threads cpu_percent cpu_affinity memory_percent parent children connections is_running Lin Original Metrics	x x x x x x x x x x x x x ux Free x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x	x x x x x x x x x x BSD Open x x x x x x x x x x x x x x x x x x x x x	x x x x x x x x x x BSD MacO x x x x x x x x x x x x x x x x x x x x	x x x x b x x x x x SX Wind x x x x x x x x x x	x x x x x x x x ows	b
================== =	==== ==	===== ==	===== ==	==== ==	===== ==	=====
item L HostInfo	inux Fr	eeBSD Op	enBSD Ma	cOSX Wi	ndows So	laris
hostname uptime proces	x x x	x x x	x x x	x x	x	x x x
os platform platformfamily virtualization CPU	x x x x	x x x	x x x	x x x	x	x x x
VendorID	x	x	x	x	x	x
Family	x	x	x	x	x	x
Model	x	x	x	x	x	x
Stepping PhysicalID CoreID Cores	x x x x	x	x	x	x x	x x x x
ModelName Microcode LoadAvg Load1 Load5 Load15 GetDockerID container id CgroupsCPU user system CgroupsMem various	x x x x x x x x x	x x x x no no no no	x x x x no no no no	x x x x no no no no	x no no no no	x x

• future work
  • process_iter
  • wait_procs
  • Process class
    • as_dict
    • wait

License

New BSD License (same as psutil)

Related Works

I have been influenced by the following great works:

• psutil: http://pythonhosted.org/psutil/
• dstat: https://github.com/dagwieers/dstat
• gosigar: https://github.com/cloudfoundry/gosigar/
• goprocinfo: https://github.com/c9s/goprocinfo
• go-ps: https://github.com/mitchellh/go-ps
• ohai: https://github.com/opscode/ohai/
• bosun: https://github.com/bosun-monitor/bosun/tree/master/cmd/scollector/collectors
• mackerel: https://github.com/mackerelio/mackerel-agent/tree/master/metrics

How to Contribute

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request

My English is terrible, so documentation or correcting comments are also welcome.