shaacker/gopsutil

psutil for golang

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/amd64
• Linux/amd64
• Linux/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)}

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

Some codes are ported from Ohai. many thanks.

Current Status

• x: work
• b: almost work but something broken

name	Linux amd64	Linux ARM	FreeBSD amd64	MacOSX	Windows
cpu_times	x	x	x
cpu_count	x	x	x	x	x
cpu_percent	x	x	x		x
cpu_times_percent	x	x	x		x
virtual_memory	x	x	x	x	x
swap_memory	x	x	x	x
disk_partitions	x	x	x	x	x
disk_io_counters	x	x
disk_usage	x	x	x	x	x
net_io_counters	x	x	x	b	x
boot_time	x	x	x	x	b
users	x	x	x	x	x
pids	x	x	x	x	x
pid_exists	x	x	x	x	x
net_connections

Process class

name	Linux amd64	Linux ARM	FreeBSD amd64	MacOSX	Windows
pid	x	x	x	x	x
ppid	x	x	x	x	x
name	x	x	x	x
cmdline	x	x
create_time	x	x
status	x	x	x	x
cwd	x	x
exe	x	x	x		x
uids	x	x	x	x
gids	x	x	x	x
terminal	x	x	x	x
io_counters	x	x
nice	x	x
num_fds	x	x
num_ctx_switches	x	x
num_threads	x	x	x	x
cpu_times	x	x
memory_info	x	x	x	x
memory_info_ex	x	x
memory_maps	x	x
open_files	x	x
send_signal	x	x	x	x
suspend	x	x	x	x
resume	x	x	x	x
terminate	x	x	x	x
kill	x	x	x	x
username	x	x	x	x
ionice
rlimit
num_handlres
threads
cpu_percent
cpu_affinity
memory_percent
children
connections
is_running

Original Metrics

item	Linux amd64	Linux ARM	FreeBSD amd64	MacOSX	Windows
HostInfo
hostname	x	x	x	x	x
uptime	x	x	x	x
proces	x	x	x
os	x	x	x	x	x
platform	x	x	x	x
platformfamiliy	x	x	x	x
virtualization	x	x
CPU
VendorID	x	x	x	x
Family	x	x	x	x
Model	x	x	x	x
Stepping	x	x	x	x
PhysicalID	x	x
CoreID	x	x
Cores	x	x
ModelName	x	x	x	x
LoadAvg
Load1	x	x	x	x
Load5	x	x	x	x
Load15	x	x	x	x
GetDockerID
container id	x	x	no	no	no
CgroupsCPU
user	x	x	no	no	no
system	x	x	no	no	no
CgroupsMem
various	x	x	no	no	no

• future work
  • process_iter
  • wait_procs
  • Process class
    • parent (use ppid instead)
    • 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
• gosiger: 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.