Go 系統監控利器-gopsutil

Go 系統監控利器-gopsutil

一、簡介

什麼是 gopsutil？

要說gopsutil就不得不先了解 psutil,顧名思義，psutil = process and system utilities， 它是 Python 的跨平臺庫，能夠輕鬆實現獲取系統執行的程式和系統利用率，包括 CPU、記憶體、磁碟、網路等資訊。 而gopsutil就是psutil的 Golang 移植版。

為什麼用 gopsutil？

和直接使用 syscall 呼叫對應的系統方法相比，gopsutil 為我們遮蔽了各個系統間的差異，可移植性非常強。

二、快速上手

安裝：

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)
}

輸出：

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"}]

三、分工明確

gopsutil 將不同的功能劃分到不同的子包中：

主要為 cpu,disk,docker,host,mem,net,process,winservices 這幾個。 想要使用對應的功能，要匯入對應的子包。例如，上面程式碼中，我們要獲取 CPU 資訊，匯入的是 cpu 子包。 上述樣例中，我們獲取到了每個 cpu 的佔用率和所有 cpu 的詳細資訊。

閒言

最近正在寫一個 Golang 實現效能監控的 demo，之後還會寫這方面的介紹或者對比。

參考文件：

• https://github.com/shirou/gopsutil

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