gopsutil: psutil for golang

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

Package Structure Changed!

Package (a.k.a. directory) structure has been changed!! see issue 24

golang 1.4 will become REQUIRED!

Since syscall package becomes frozen, we should use golang/x/sys of golang 1.4 as soon as possible.

Available Architectures

• FreeBSD i386/amd64
• Linux i386/amd64/arm(raspberry pi)
• Windows/amd64
• Darwin/amd64

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

Usage

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.

Documentation

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

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 ...")
• 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 work but something broken

Process class

name	Linux	FreeBSD	MacOSX	Windows
pid	x	x	x	x
ppid	x	x	x	x
name	x	x	x	x
cmdline	x		x	x
create_time	x
status	x	x	x
cwd	x
exe	x	x		x
uids	x	x	x
gids	x	x	x
terminal	x	x	x
io_counters	x
nice	x		x	x
num_fds	x
num_ctx_switches	x
num_threads	x	x	x	x
cpu_times	x
memory_info	x	x	x
memory_info_ex	x
memory_maps	x
open_files	x
send_signal	x	x	x
suspend	x	x	x
resume	x	x	x
terminate	x	x	x
kill	x	x	x
username	x
ionice
rlimit
num_handlres
threads
cpu_percent	x		x
cpu_affinity
memory_percent
parent	x		x
children	x	x	x
connections	x		x
is_running

Original Metrics

item	Linux	FreeBSD	MacOSX	Windows
HostInfo
hostname	x	x	x	x
uptime	x	x	x
proces	x	x
os	x	x	x	x
platform	x	x	x
platformfamiliy	x	x	x
virtualization	x
CPU
VendorID	x	x	x	x
Family	x	x	x	x
Model	x	x	x	x
Stepping	x	x	x	x
PhysicalID	x
CoreID	x
Cores	x			x
ModelName	x	x	x	x
LoadAvg
Load1	x	x	x
Load5	x	x	x
Load15	x	x	x
GetDockerID
container id	x	no	no	no
CgroupsCPU
user	x	no	no	no
system	x	no	no	no
CgroupsMem
various	x	no	no	no

• 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.