【发布时间】：2021-12-17 22:49:18
【问题描述】：
我有一个简单的 Entity Framework Core (5.0.11) 应用程序，它与 SQL Server 的 localhost 实例连接。从 IDE 运行时它运行良好，但从 Docker 容器运行时出现 SQL 连接错误。
我没有为 SQL 服务器使用独立容器，而是连接到我机器上的本地主机。
我使用的连接字符串如下
"ConnectionStrings": {
"DefaultConnectionString": "Server=localhost;Database=LOCALDatabase;User id=userId;password=password"
}
以下是docker容器错误
"EventId":20004,"LogLevel":"Error","Category":"Microsoft.EntityFrameworkCore.Database.Connection","Message":"An 使用与数据库的连接发生错误 \u0027LOCALDatabase\u0027 在服务器上 \u0027localhost\u0027.","State":{"Message":"使用时发生错误 与服务器上的数据库 \u0027LOCALDatabase\u0027 的连接 \u0027localhost\u0027.","database":"LOCALDatabase","server":"localhost","{OriginalFormat}":"An 使用与数据库 \u0027{database}\u0027 的连接时发生错误 在服务器 \u0027{服务器}\u0027 上。”
我已经使用虚拟数据（不是来自数据库）测试了容器化应用程序，它工作正常，因此端口映射或容器化应用程序的可访问性没有问题。
Docker构建和运行命令如下
docker build -t test-api:v1 .
docker run -it -p 7277:80 --name testapi test-api:v1
更新
以下是代码文件
//Data Access Layer Project
namespace DAL.Repositories
{
public interface ITable1Repository
{
Task<IEnumerable<Dbtable1>> GetAsync();
}
}
public class Table1Repository : ITable1Repository
{
private readonly LOCALDbContext _dbContext;
public Table1Repository(LOCALDbContext dbContext)
{
_dbContext = dbContext;
}
public async Task<IEnumerable<Dbtable1>> GetAsync()
{
return await _dbContext.Dbtable1s.ToListAsync();
}
}
//Database entity
namespace DAL.Entities
{
[Table("DBTable1")]
public partial class Dbtable1
{
[Key]
public int Column1 { get; set; }
[StringLength(50)]
public string Column2 { get; set; }
[StringLength(50)]
public string Column3 { get; set; }
}
}
//DbContext
public partial class LOCALDbContext : DbContext
{
public LOCALDbContext()
{
}
public LOCALDbContext(DbContextOptions<LOCALDbContext> options)
: base(options)
{
}
public virtual DbSet<Dbtable1> Dbtable1s { get; set; }
protected override void OnModelCreating(ModelBuilder modelBuilder)
{
modelBuilder.HasAnnotation("Relational:Collation", "Latin1_General_CI_AS");
modelBuilder.Entity<Dbtable1>(entity =>
{
entity.Property(e => e.Column1).ValueGeneratedNever();
});
OnModelCreatingPartial(modelBuilder);
}
partial void OnModelCreatingPartial(ModelBuilder modelBuilder);
}
//API Project
//Controller
namespace API.Controllers
{
[ApiController]
[Route("[controller]")]
public class TestController : ControllerBase
{
private readonly ITable1Repository _table1Repository;
public TestController(ITable1Repository table1Repository)
{
_table1Repository = table1Repository;
}
// GET: <TestController>
[HttpGet]
public async Task<IEnumerable<Dbtable1>> Get()
{
return await _table1Repository.GetAsync();
}
}
}
//Program.cs
using DAL.Data;
using DAL.Repositories;
using Microsoft.EntityFrameworkCore;
var builder = WebApplication.CreateBuilder(args);
// Add services to the container.
builder.Services.AddControllers();
builder.Services.AddSwaggerGen(c =>
{
c.SwaggerDoc("v1", new() { Title = "API", Version = "v1" });
});
var connectionString = builder.Configuration.GetConnectionString("DefaultConnectionString");
builder.Services.AddDbContext<LOCALDbContext>(options => options.UseSqlServer(connectionString));
builder.Services.AddScoped<ITable1Repository, Table1Repository>();
var app = builder.Build();
// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
app.UseSwagger();
app.UseSwaggerUI(c => c.SwaggerEndpoint("/swagger/v1/swagger.json", "API v1"));
}
app.UseHttpsRedirection();
app.UseAuthorization();
app.MapControllers();
app.Run();
//appsettings.json
{
"Logging": {
"LogLevel": {
"Default": "Information",
"Microsoft.AspNetCore": "Warning"
}
},
"AllowedHosts": "*",
"ConnectionStrings": {
"DefaultConnectionString": "Server=localhost;Database=LOCALDatabase;User id=userid;password=password"
}
}
//appsettings.Docker.json
{
"ConnectionStrings": {
"DefaultConnectionString": "Server=host.docker.internal;Database=LOCALDatabase;User id=userid;password=password"
}
}
//DockerFile
FROM mcr.microsoft.com/dotnet/aspnet:6.0 AS base
WORKDIR /app
EXPOSE 80
EXPOSE 443
FROM mcr.microsoft.com/dotnet/sdk:6.0 AS build
WORKDIR /src
COPY *.sln ./
COPY ./src/API/API.csproj ./src/API/
COPY ./src/DAL/DAL.csproj ./src/DAL/
RUN dotnet restore
COPY . .
RUN dotnet publish -c Release -o out
FROM base
WORKDIR /app
COPY --from=build /src/out .
ENTRYPOINT ["dotnet", "API.dll"]
docker 构建和运行命令 docker build -t test-api:v1 。搬运工运行 -it -p 7277:80 -e "ASPNETCORE_ENVIRONMENT=Docker" --name testapi test-api:v1
我已经使用一些本地数据（非 Db）测试了容器化应用程序，它工作正常，但 SQL 连接导致了问题。
以下是数据库表脚本
USE [LOCALDatabase]
GO
/****** Object: Table [dbo].[DBTable1] Script Date: 04/11/2021 13:50:33 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[DBTable1](
[Column1] [int] NOT NULL,
[Column2] [nvarchar](50) NULL,
[Column3] [nvarchar](50) NULL,
CONSTRAINT [PK_DBTable1] PRIMARY KEY CLUSTERED
(
[Column1] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
GO
INSERT [dbo].[DBTable1] ([Column1], [Column2], [Column3]) VALUES (1, N'Richard', N'King')
INSERT [dbo].[DBTable1] ([Column1], [Column2], [Column3]) VALUES (2, N'Stuart', N'Philip')
【问题讨论】：
-
您能提供如何运行 docker 容器吗？ docker-compose 文件或启动容器的 docker cli 命令
-
我正在使用 docker cli 命令。我已经用构建和运行命令更新了我的问题。
标签： sql-server docker entity-framework-core