c# - Docker 与 .NET Core、SQL Server、Elasticsearch 和 cerebro 服务组成
问题描述
我正在尝试使用 docker-compose 文件运行许多服务。首先，假设 Docker 版本 20.10.3 运行在 Red Hat Enterprise Linux 版本 8.3 上。
这是 docker-compose 文件：
version: "3.8"
services:
projmssql:
image: "mcr.microsoft.com/mssql/server:2019-latest"
container_name: proj-core-sqlserver
environment:
SA_PASSWORD: "mypassword"
ACCEPT_EULA: "Y"
ports:
- "1401:1433"
volumes:
- type: bind
source: ./data-mssql
target: /var/opt/mssql/data
- type : bind
source: ./log-mssql
target: /var/opt/mssql/log
restart: always
projelastic:
image: docker.elastic.co/elasticsearch/elasticsearch:7.10.1
container_name: proj-core-elastic
environment:
- node.name=es01
- cluster.name=proj-docker-cluster
- discovery.type=single-node
- bootstrap.memory_lock=false
- "ES_JAVA_OPTS=-Xms1g -Xmx1g"
- path.repo=/usr/share/elasticsearch/backup
- path.logs=/usr/share/elasticsearch/logs
ulimits:
memlock:
soft: -1
hard: -1
volumes:
- type: bind
source: ./data-es01
target: /usr/share/elasticsearch/data
- type : bind
source: ./_backup-es01
target: /usr/share/elasticsearch/backup
- type : bind
source: ./logs-es01
target: /usr/share/elasticsearch/logs
ports:
- 9220:9200
- 9320:9300
projcerebro:
image: lmenezes/cerebro
container_name: proj-core-cerebro
ports:
- "9020:9000"
command:
- -Dhosts.0.host=http://projelastic:9200
projapi:
image: proj/projcoreapp
depends_on:
- projmssql
container_name: proj-core-api
ports:
- "8080:80"
restart: always
#Specify Environment Variables for the Api Service
environment:
- ASPNETCORE_ENVIRONMENT=Docker
projApi 服务来自我使用以下 Dockerfile 构建的本地映像（proj/projcoreapp）：
FROM mcr.microsoft.com/dotnet/sdk:5.0 AS build-env
WORKDIR /app
COPY . ./
RUN dotnet publish proj.api.net -c Release -o out
FROM mcr.microsoft.com/dotnet/aspnet:5.0
WORKDIR /app
COPY --from=build-env /app/out .
ENTRYPOINT ["dotnet", "Proj.Api.dll"]
在我的 .net 核心应用程序中，我有一个专用的 appsettings.Docker.json 文件
{
"Logging": {
"LogLevel": {
"Default": "Information",
"Microsoft": "Warning",
"Microsoft.Hosting.Lifetime": "Information"
}
},
"AllowedHosts": "*",
"Elasticsearch": {
"Server": "http://projelastic:9200",
"DebugMode": true,
"UpdateMapping": false
},
"ConnectionStrings": {
"DatabaseConnection": "Server=projmssql;Database=PROJ-NET;Persist Security Info=False;User ID=sa;Password=mypassword;MultipleActiveResultSets=True;TrustServerCertificate=False;Connection Timeout=30;"
}
}
.csprojAPI .net 核心项目的
<Project Sdk="Microsoft.NET.Sdk.Web">
<PropertyGroup>
<TargetFramework>net5.0</TargetFramework>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
<DocumentationFile></DocumentationFile>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="Microsoft.AspNetCore.Authentication" Version="2.2.0" />
<PackageReference Include="Microsoft.AspNetCore.Authentication.AzureAD.UI" Version="5.0.5" />
<PackageReference Include="Microsoft.AspNetCore.Mvc.Versioning" Version="5.0.0" />
<PackageReference Include="Microsoft.Identity.Web" Version="1.9.1" />
<PackageReference Include="Microsoft.VisualStudio.Azure.Containers.Tools.Targets" Version="1.10.14" />
<PackageReference Include="Swashbuckle.AspNetCore" Version="5.6.3" />
</ItemGroup>
<ItemGroup>
<ProjectReference Include="..\domain.net\Domain.csproj" />
</ItemGroup>
</Project>
.csproj域库的
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFramework>net5.0</TargetFramework>
</PropertyGroup>
<ItemGroup>
<Compile Remove="Entities\Organisation.cs" />
<Compile Remove="Entities\OrganisationTeam.cs" />
<Compile Remove="Entities\OrganisationTeamRole.cs" />
</ItemGroup>
<ItemGroup>
<PackageReference Include="Elasticsearch.Net" Version="7.10.0" />
<PackageReference Include="Microsoft.EntityFrameworkCore" Version="5.0.5" />
<PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="5.0.5" />
<PackageReference Include="NEST" Version="7.10.0" />
<PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
</ItemGroup>
<ItemGroup>
<Folder Include="Utilities\" />
<Folder Include="ViewModels\" />
</ItemGroup>
<ItemGroup>
<ProjectReference Include="..\filter.net\Filter.csproj" />
</ItemGroup>
</Project>
.csproj过滤器库的
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFramework>net5.0</TargetFramework>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="Elasticsearch.Net" Version="7.10.0" />
<PackageReference Include="GeoJSON.Net" Version="1.2.19" />
<PackageReference Include="NEST" Version="7.10.0" />
<PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
</ItemGroup>
<ItemGroup>
<Folder Include="Entities\" />
<Folder Include="Helpers\" />
<Folder Include="ViewModelMapper\" />
</ItemGroup>
</Project>
在我的 .net 核心启动中，我有以下配置
public void ConfigureServices(IServiceCollection services)
{
services.AddDbContext<ProjdbContext>(options =>
options.UseSqlServer(Configuration.GetConnectionString("DatabaseConnection"))
);
services.AddScoped<IProjUserService, ProjUserService>();
services.AddSingleton<IProjEntitiesService>(s =>
new ProjEntitiesService
(
Configuration.GetValue<string>("Elasticsearch:Server"),
Configuration.GetValue<bool>("Elasticsearch:DebugMode"),
Configuration.GetValue<bool>("Elasticsearch:UpdateMapping")
));
services.AddControllers();
services.AddSwaggerGen(c =>
{
现在让我们谈谈这个问题：一旦我运行了 docker-compose 文件，所有服务都可以正常运行，并且我可以从主机与所有服务进行交互。API 服务能够在内部连接到数据库，但是一旦我运行一些 API 与 elasticsearch 服务交互，我就会收到以下错误：
Elasticsearch.Net.UnexpectedElasticsearchClientException: The information requested is unavailable on the current platform.
---> System.PlatformNotSupportedException: The information requested is unavailable on the current platform.
at System.Net.NetworkInformation.StringParsingHelpers.ParseActiveTcpConnectionsFromFiles(String tcp4ConnectionsFile, String tcp6ConnectionsFile)
at System.Net.NetworkInformation.LinuxIPGlobalProperties.GetActiveTcpConnections()
at Elasticsearch.Net.Diagnostics.TcpStats.GetStates()
at Elasticsearch.Net.HttpConnection.Request[TResponse](RequestData requestData)
at Elasticsearch.Net.RequestPipeline.CallElasticsearch[TResponse](RequestData requestData)
at Elasticsearch.Net.Transport`1.Request[TResponse](HttpMethod method, String path, PostData data, IRequestParameters requestParameters)
--- End of inner exception stack trace ---
正如我所说，所有服务都正常工作，甚至 Cerebro 服务也能够在内部连接到 elasticsearch 服务，所以这看起来只是 .net 核心服务的问题。
我找不到关于上述问题的任何主题，所以我希望这里有人可以帮助我解决这个问题。
PS：.NET Core API 本地部署在 Windows 机器（Kestrel Web 服务器）上，可以正常运行，连接到数据库和 elasticsearch，它们都在 Docker 上运行。
更新：
我忘了提到这台机器是在公司代理后面运行的。牢记这一点，我想检查我的 API 服务是否能够到达 Elasticsearch 服务端点：http://projelastic:9200. 为此，我在我的 API 服务容器上执行了一个交互式 bash shell
docker exec -it proj-core-api /bin/bash：在这里我注意到我的容器无法访问互联网
root@8e7c81f98455:/app# apt-get update
Err:1 http://security.debian.org/debian-security buster/updates InRelease
Could not connect to security.debian.org:80 (111: Connection refused)
因此，我在 docker-compose 文件中添加了代理服务器的变量，包括 Elasticsearch 服务域的 no_proxy 变量。
projapi:
image: proj/projcoreapp
depends_on:
- projmssql
container_name: proj-core-api
ports:
- "8080:80"
restart: always
#Specify Environment Variables for the Api Service
environment:
- ASPNETCORE_ENVIRONMENT=Docker
- http_proxy=http://user:pwd@address
- https_proxy=http://user:pwd@address
- no_proxy=projelastic
通过上述更改，我能够在我的 API 容器中安装 curl 并执行我的初始测试：
root@0573a44a6836:/app# curl -X GET http://projelastic:9200
{
"name" : "es01",
"cluster_name" : "proj-docker-cluster",
"cluster_uuid" : "j7mdpxkrSRKxpHnktvnZIw",
"version" : {
"number" : "7.10.1",
"build_flavor" : "default",
"build_type" : "docker",
"build_hash" : "1c34507e66d7db1211f66f3513706fdf548736aa",
"build_date" : "2020-12-05T01:00:33.671820Z",
"build_snapshot" : false,
"lucene_version" : "8.7.0",
"minimum_wire_compatibility_version" : "6.8.0",
"minimum_index_compatibility_version" : "6.0.0-beta1"
},
"tagline" : "You Know, for Search"
}
无论如何添加代理变量并不能解决最初的错误，所以作为最后的测试，我把我的源代码放在Windows 10 machine它运行的地方 aDocker version 20.10.7并且没有 proxy。我构建了 API 映像并运行了 docker-compose。所有服务都正常工作，所以我仍然认为在 Linux 机器上代理在我当前的问题上发挥着重要作用。
更新 2： 感谢@AndrewSilver 的建议，我能够解决这个问题。也非常感谢@kha 提供更多细节。
解决方案
推荐阅读
- python - {% translate s %} 传入 {% include ... with s=s %} 不在 .po 文件中
- angular - ng-select下拉英雄并使用选择的英雄？
- html - 如何更改 Angular Material 中占位符的颜色？
- azure - LogicApp OAuth API 连接器和 ARM 部署
- python - 如何将 Python 日志记录与 Redis 工作者一起使用？
- python - 我如何在 GUI 中使用 Tkinter 在 python 中显示过滤的 DataFrame？
- python - 如果值重叠，则合并 pandas dfs 列，否则分配默认值
- flutter - 仅当用户向下滑动时如何显示小部件？
- blockchain - 通过 WSS 连接到在本地网络上运行的 Polkadot Full Node 失败
- reactjs - rxjs 可观察捕获错误上缺少“body”属性