无法将具有EFCore Mysql提供程序的Docker中的Asp.net Core WebApi连接到主机服务器上的非Docker Mysql

我有一个Asp.Net Core 3.1.3 WebApi，提供程序为EfCore 3.1.3和Pomelo.EntityFrameworkCore.MySql 此WebApi是在Docker中构建和部署的

主机服务器是Debian 10，它配置了UFW作为防火墙

我在主机服务器上安装了一个Mysql服务器

我将Mysql的绑定地址设置为0.0.0.0

/etc/mysql/mysql.conf.d/mysqld.cnf

[mysqld]
pid-file        = /var/run/mysqld/mysqld.pid
socket          = /var/run/mysqld/mysqld.sock
datadir         = /var/lib/mysql
log-error       = /var/log/mysql/error.log
bind-address    = 0.0.0.0

我在UFW中创建了一个规则，只允许本地主机和

docker0

网桥ip地址

在docker compose配置中，我添加了主机服务器的ip地址，但与MySql的连接失败

info: Microsoft.EntityFrameworkCore.Infrastructure[10403]
Entity Framework Core 3.1.3 initialized 'ApplicationContext' using provider 'Pomelo.EntityFrameworkCore.MySql' with options: using lazy-loading proxies ServerVersion 8.0.19 MySql 
fail: Microsoft.EntityFrameworkCore.Database.Connection[20004]
An error occurred using the connection to database '<db_name>' on server '<host_ip_address>'.
info: Microsoft.EntityFrameworkCore.Infrastructure[10404]
A transient exception has been encountered during execution and the operation will be retried after 0ms.
MySql.Data.MySqlClient.MySqlException (0x80004005): Connect Timeout expired.
---> System.ObjectDisposedException: Cannot access a disposed object.
Object name: 'System.Net.Sockets.Socket'.

我生成迁移脚本并将其部署在服务器上，因为Pomelo在调用dbContext.Database.Migrate（）时将数据库名称设置为空字符串

在dockerfile中，我公开了端口80和443

FROM mcr.microsoft.com/dotnet/core/aspnet:3.1 AS base
WORKDIR /app
EXPOSE 80
EXPOSE 443
...

我在docker compose文件中将数据库参数作为环境变量发送

我做了一些数据播种，从Identity添加用户和角色

var roleManager = provider.GetRequiredService<RoleManager<RoleModel>>();
roleManager.CreateAsync(new RoleModel(roleName)).GetAwaiter().GetResult();
...

var rolemager=provider.GetRequiredService（）；
CreateAsync（新RoleModel（roleName））.GetAwaiter（）.GetResult（）；
...

---

我错过了什么？

除了在docker compose中使用主机网络模式部署docker容器之外，我没有找到任何其他解决方案

docker-compose.yml

services:
  <service_name>:
    image: <image_name>
    network_mode: "host" #important here
    ports:
      - "5000:5000"
      - "5001:5001"
    environment:
      ASPNETCORE_Kestrel__Certificates__Default__Password: "${ASPNETCORE_KESTREL_CERTIFICATE_PASSWORD}"
      ASPNETCORE_Kestrel__Certificates__Default__Path: "${ASPNETCORE_KESTREL_CERTIFICATE_PATH}"
      ASPNETCORE_ENVIRONMENT: Production
      "Database:Server": "${Database_Server}"
      "Database:Version": "${Database_Version}"
      "Database:Name": "${Database_Name}"
      "Database:User": "${Database_User}"
      "Database:Password": "${Database_Password}"
    build:
      context: ./Src
      dockerfile: Dockerfile-build
    volumes:
      - ${CERTIFICATE_PATH}:/https
      - ${LOGS_PATH}:/app/logs

服务：
:
图片：
网络模式：“主机”#在这里很重要
端口：
- "5000:5000"
- "5001:5001"
环境：
ASPNETCORE_Kestrel_证书_默认密码：${ASPNETCORE_Kestrel_证书_密码}”
ASPNETCORE\u Kestrel\u证书\u默认路径：${ASPNETCORE\u Kestrel\u证书\u路径}
ASPNETCORE_环境：生产
数据库：服务器“${Database\u Server}”
“数据库：版本”：“${Database_Version}”
数据库：名称“${Database\u Name}”
数据库：用户“${Database\u User}”
数据库：密码“${Database\u Password}”
建造：
上下文：./Src
dockerfile：dockerfile生成
卷数：
-${CERTIFICATE\u PATH}:/https
-${LOGS\u PATH}:/app/LOGS

在这种情况下，我只需要使用主机服务器的ip地址来连接到MySql（以及随附的所有Ufw、MySql配置）

var roleManager = provider.GetRequiredService<RoleManager<RoleModel>>();
roleManager.CreateAsync(new RoleModel(roleName)).GetAwaiter().GetResult();
...

services:
  <service_name>:
    image: <image_name>
    network_mode: "host" #important here
    ports:
      - "5000:5000"
      - "5001:5001"
    environment:
      ASPNETCORE_Kestrel__Certificates__Default__Password: "${ASPNETCORE_KESTREL_CERTIFICATE_PASSWORD}"
      ASPNETCORE_Kestrel__Certificates__Default__Path: "${ASPNETCORE_KESTREL_CERTIFICATE_PATH}"
      ASPNETCORE_ENVIRONMENT: Production
      "Database:Server": "${Database_Server}"
      "Database:Version": "${Database_Version}"
      "Database:Name": "${Database_Name}"
      "Database:User": "${Database_User}"
      "Database:Password": "${Database_Password}"
    build:
      context: ./Src
      dockerfile: Dockerfile-build
    volumes:
      - ${CERTIFICATE_PATH}:/https
      - ${LOGS_PATH}:/app/logs