【GoCN酷Go推荐】Go 系统监控利器-gopsutil

什么是 gopsutil？要说gopsutil就不得不先了解 psutil,顾名思义，psutil = process and system utilities， 它是 Python 的跨平台库，能够轻松实现获取系统运行的进程和系统利用率，包括 CPU、内存、磁盘、网络等信息。而gopsutil就是psutil的 Golang 移植版。

为什么用 gopsutil？和直接使用 syscall 调用对应的系统方法相比，gopsutil 为我们屏蔽了各个系统间的差异，可移植性非常强。

安装：

go get github.com/shirou/gopsutil

使用：

package main

import (
    "fmt"
    "github.com/shirou/gopsutil/cpu"
    "time"
)

func main() {
    info, _ := cpu.Info()

    per, _ := cpu.Percent(1 * time.Second, true)

    fmt.Printf("CPU Percent: %f\n", per)

    fmt.Println(info)
}

输出：

CPU Percent: [4.040404 4.000000 5.050505 6.930693]
[{"cpu":0,"vendorId":"AuthenticAMD","family":"23","model":"49","stepping":0,"physicalId":"0","coreId":"0","cores":1,"modelName":"AMD EPYC 7K62 48-Core Processor","mhz":2595.124,"cacheSize":512,"flags":["fpu","vme","de","pse","tsc","msr","pae","mce","cx8","apic","sep","mtrr","pge","mca","cmov","pat","pse36","clflush","mmx","fxsr","sse","sse2","ht","syscall","nx","mmxext","fxsr_opt","pdpe1gb","rdtscp","lm","rep_good","nopl","cpuid","extd_apicid","tsc_known_freq","pni","pclmulqdq","ssse3","fma","cx16","sse4_1","sse4_2","x2apic","movbe","popcnt","aes","xsave","avx","f16c","rdrand","hypervisor","lahf_lm","cmp_legacy","cr8_legacy","abm","sse4a","misalignsse","3dnowprefetch","osvw","topoext","ibpb","vmmcall","fsgsbase","bmi1","avx2","smep","bmi2","rdseed","adx","smap","clflushopt","sha_ni","xsaveopt","xsavec","xgetbv1","arat"],"microcode":"0x1000065"} {"cpu":1,"vendorId":"AuthenticAMD","family":"23","model":"49","stepping":0,"physicalId":"0","coreId":"1","cores":1,"modelName":"AMD EPYC 7K62 48-Core Processor","mhz":2595.124,"cacheSize":512,"flags":["fpu","vme","de","pse","tsc","msr","pae","mce","cx8","apic","sep","mtrr","pge","mca","cmov","pat","pse36","clflush","mmx","fxsr","sse","sse2","ht","syscall","nx","mmxext","fxsr_opt","pdpe1gb","rdtscp","lm","rep_good","nopl","cpuid","extd_apicid","tsc_known_freq","pni","pclmulqdq","ssse3","fma","cx16","sse4_1","sse4_2","x2apic","movbe","popcnt","aes","xsave","avx","f16c","rdrand","hypervisor","lahf_lm","cmp_legacy","cr8_legacy","abm","sse4a","misalignsse","3dnowprefetch","osvw","topoext","ibpb","vmmcall","fsgsbase","bmi1","avx2","smep","bmi2","rdseed","adx","smap","clflushopt","sha_ni","xsaveopt","xsavec","xgetbv1","arat"],"microcode":"0x1000065"} {"cpu":2,"vendorId":"AuthenticAMD","family":"23","model":"49","stepping":0,"physicalId":"0","coreId":"2","cores":1,"modelName":"AMD EPYC 7K62 48-Core Processor","mhz":2595.124,"cacheSize":512,"flags":["fpu","vme","de","pse","tsc","msr","pae","mce","cx8","apic","sep","mtrr","pge","mca","cmov","pat","pse36","clflush","mmx","fxsr","sse","sse2","ht","syscall","nx","mmxext","fxsr_opt","pdpe1gb","rdtscp","lm","rep_good","nopl","cpuid","extd_apicid","tsc_known_freq","pni","pclmulqdq","ssse3","fma","cx16","sse4_1","sse4_2","x2apic","movbe","popcnt","aes","xsave","avx","f16c","rdrand","hypervisor","lahf_lm","cmp_legacy","cr8_legacy","abm","sse4a","misalignsse","3dnowprefetch","osvw","topoext","ibpb","vmmcall","fsgsbase","bmi1","avx2","smep","bmi2","rdseed","adx","smap","clflushopt","sha_ni","xsaveopt","xsavec","xgetbv1","arat"],"microcode":"0x1000065"} {"cpu":3,"vendorId":"AuthenticAMD","family":"23","model":"49","stepping":0,"physicalId":"0","coreId":"3","cores":1,"modelName":"AMD EPYC 7K62 48-Core Processor","mhz":2595.124,"cacheSize":512,"flags":["fpu","vme","de","pse","tsc","msr","pae","mce","cx8","apic","sep","mtrr","pge","mca","cmov","pat","pse36","clflush","mmx","fxsr","sse","sse2","ht","syscall","nx","mmxext","fxsr_opt","pdpe1gb","rdtscp","lm","rep_good","nopl","cpuid","extd_apicid","tsc_known_freq","pni","pclmulqdq","ssse3","fma","cx16","sse4_1","sse4_2","x2apic","movbe","popcnt","aes","xsave","avx","f16c","rdrand","hypervisor","lahf_lm","cmp_legacy","cr8_legacy","abm","sse4a","misalignsse","3dnowprefetch","osvw","topoext","ibpb","vmmcall","fsgsbase","bmi1","avx2","smep","bmi2","rdseed","adx","smap","clflushopt","sha_ni","xsaveopt","xsavec","xgetbv1","arat"],"microcode":"0x1000065"}]

gopsutil 将不同的功能划分到不同的子包中：主要为 cpu,disk,docker,host,mem,net,process,winservices 这几个。想要使用对应的功能，要导入对应的子包。例如，上面代码中，我们要获取 CPU 信息，导入的是 cpu 子包。上述样例中，我们获取到了每个 cpu 的占用率和所有 cpu 的详细信息。

最近正在写一个 Golang 实现性能监控的 demo，之后还会写这方面的介绍或者对比。

https://github.com/shirou/gopsutil 

更多请查看：https://github.com/shirou/gopsutil 

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