如何解决在实际服务器中移动两个容器后如何连接它们一个是MySQL？
构建后，我可以从另一个App-Docker容器连接到MySQL Docker容器，
使用docker compose up --build -d命令
但是，如果我一次删除App-Docker容器，然后再次尝试与MySQL连接，
使用
docker run --name the-dockapp -e MYSQL_ROOT_PASSWORD=123 --link DockAppDB:db --network="dockapp_default" -p 0.0.0.0:5000:80 -t --rm dockapp
然后它执行但不与MySQL连接。 出乎意料的是，在相同条件下，上述命令适用于phpmyadmin与MySQL（DockAppDB）连接。
The main problem is,how could I connect these two container after shifting them in real server?
这是我的docker-compose.yml
version: '3.4'
services:
dockapp:
image: dockapp
restart: always
container_name: the-dockapp
ports:
# - 5001:443
- 5000:80
environment:
- CONTAINER=true
# - ASPNETCORE_ENVIRONMENT=Development
- ASPNETCORE_ENVIRONMENT=Production
# - ASPNETCORE_URLS=https://+:443;http://+:80
# - ASPNETCORE_HTTPS_PORT=5001
# - DBHOST=mysql
build:
context: .
dockerfile: Server/Dockerfile
depends_on:
- mysql
# links:
# - mysql
networks:
- dockapp_default
mysql:
image: mysql
restart: always
container_name: DockAppDB
ports:
- 3306:3306
environment:
MYSQL_ROOT_PASSWORD: "123"
volumes:
- C:/mysql-data:/var/lib/mysql
networks:
- dockapp_default
phpmyadmin:
image: phpmyadmin/phpmyadmin
restart: always
environment:
PMA_HOST: mysql
PMA_USER: root
PMA_PASSWORD: 123
ports:
- "8081:80"
networks:
dockapp_default: # external network
driver: bridge
external: true
此命令获取
docker run --name the-dockapp -e MYSQL_ROOT_PASSWORD=123 --link DockAppDB:db --network="dockapp_default" -p 0.0.0.0:5000:80 -t --rm dockapp
以下错误：
warn: Microsoft.AspNetCore.DataProtection.Repositories.FileSystemXmlRepository[60]
Storing keys in a directory '/root/.aspnet/DataProtection-Keys' that may not be persisted outside of the container. Protected data will be unavailable when container is destroyed.
warn: Microsoft.AspNetCore.DataProtection.KeyManagement.XmlKeyManager[35]
No XML encryptor configured. Key {63fbc0a8-b229-42d6-a348-2c58fd1fa701} may be persisted to storage in unencrypted form.
fail: Microsoft.EntityFrameworkCore.Database.Connection[20004]
An error occurred using the connection to database '' on server 'localhost'.
crit: Microsoft.AspNetCore.Hosting.Diagnostics[6]
Application startup exception
System.InvalidOperationException: An exception has been raised that is likely due to a transient failure. Consider enabling transient error resiliency by adding 'EnableRetryOnFailure()' to the 'UseMySql' call.
---> MySql.Data.MySqlClient.MySqlException (0x80004005): Unable to connect to any of the specified MySQL hosts.
at MySqlConnector.Core.ServerSession.ConnectAsync(ConnectionSettings cs,ILoadBalancer loadBalancer,IOBehavior ioBehavior,CancellationToken cancellationToken) in C:\projects\mysqlconnector\src\MySqlConnector\Core\ServerSession.cs:line 442
at MySql.Data.MySqlClient.MySqlConnection.CreateSessionAsync(ConnectionPool pool,Nullable`1 ioBehavior,CancellationToken cancellationToken) in C:\projects\mysqlconnector\src\MySqlConnector\MySql.Data.MySqlClient\MySqlConnection.cs:line 657
at MySql.Data.MySqlClient.MySqlConnection.OpenAsync(Nullable`1 ioBehavior,CancellationToken cancellationToken) in C:\projects\mysqlconnector\src\MySqlConnector\MySql.Data.MySqlClient\MySqlConnection.cs:line 312
at MySql.Data.MySqlClient.MySqlConnection.Open() in C:\projects\mysqlconnector\src\MySqlConnector\MySql.Data.MySqlClient\MySqlConnection.cs:line 280
at Microsoft.EntityFrameworkCore.Storage.RelationalConnection.OpenDbConnection(Boolean errorsExpected)
at Microsoft.EntityFrameworkCore.Storage.RelationalConnection.Open(Boolean errorsExpected)
at Pomelo.EntityFrameworkCore.MySql.Storage.Internal.MySqlRelationalConnection.Open(Boolean errorsExpected)
at Pomelo.EntityFrameworkCore.MySql.Storage.Internal.MySqlDatabaseCreator.<>c__DisplayClass18_0.<Exists>b__0(DateTime giveUp)
at Microsoft.EntityFrameworkCore.ExecutionStrategyExtensions.<>c__DisplayClass12_0`2.<Execute>b__0(DbContext c,TState s)
at Pomelo.EntityFrameworkCore.MySql.Storage.Internal.MySqlExecutionStrategy.Execute[TState,TResult](TState state,Func`3 operation,Func`3 verifySucceeded)
--- End of inner exception stack trace ---
at Pomelo.EntityFrameworkCore.MySql.Storage.Internal.MySqlExecutionStrategy.Execute[TState,Func`3 verifySucceeded)
at Microsoft.EntityFrameworkCore.ExecutionStrategyExtensions.Execute[TState,TResult](IExecutionStrategy strategy,TState state,Func`2 operation,Func`2 verifySucceeded)
at Microsoft.EntityFrameworkCore.ExecutionStrategyExtensions.Execute[TState,Func`2 operation)
at Pomelo.EntityFrameworkCore.MySql.Storage.Internal.MySqlDatabaseCreator.Exists(Boolean retryOnNotExists)
at Pomelo.EntityFrameworkCore.MySql.Storage.Internal.MySqlDatabaseCreator.Exists()
at Microsoft.EntityFrameworkCore.Migrations.HistoryRepository.Exists()
at Microsoft.EntityFrameworkCore.Migrations.Internal.Migrator.Migrate(String targetMigration)
at Pomelo.EntityFrameworkCore.MySql.Migrations.Internal.MySqlMigrator.Migrate(String targetMigration)
at Microsoft.EntityFrameworkCore.RelationalDatabaseFacadeExtensions.Migrate(DatabaseFacade databaseFacade)
at Server.Startup.Configure(IApplicationBuilder app,IWebHostEnvironment env,CentralDBContext _context) in /src/Server/Startup.cs:line 155
at System.RuntimeMethodHandle.InvokeMethod(Object target,Object[] arguments,Signature sig,Boolean constructor,Boolean wrapExceptions)
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj,BindingFlags invokeAttr,Binder binder,Object[] parameters,CultureInfo culture)
at Microsoft.AspNetCore.Hosting.ConfigureBuilder.Invoke(Object instance,IApplicationBuilder builder)
at Microsoft.AspNetCore.Hosting.ConfigureBuilder.<>c__DisplayClass4_0.<Build>b__0(IApplicationBuilder builder)
at Microsoft.AspNetCore.Hosting.GenericWebHostBuilder.<>c__DisplayClass13_0.<UseStartup>b__2(IApplicationBuilder app)
at Microsoft.AspNetCore.Mvc.Filters.MiddlewareFilterBuilderStartupFilter.<>c__DisplayClass0_0.<Configure>g__MiddlewareFilterBuilder|0(IApplicationBuilder builder)
at Microsoft.AspNetCore.HostFilteringStartupFilter.<>c__DisplayClass0_0.<Configure>b__0(IApplicationBuilder app)
at Microsoft.AspNetCore.Hosting.GenericWebHostService.StartAsync(CancellationToken cancellationToken)
Unhandled exception. System.InvalidOperationException: An exception has been raised that is likely due to a transient failure. Consider enabling transient error resiliency by adding 'EnableRetryOnFailure()' to the 'UseMySql' call.
---> MySql.Data.MySqlClient.MySqlException (0x80004005): Unable to connect to any of the specified MySQL hosts.
at MySqlConnector.Core.ServerSession.ConnectAsync(ConnectionSettings cs,IApplicationBuilder builder)
at Microsoft.AspNetCore.Hosting.ConfigureBuilder.<>c__DisplayClass4_0.<Build>b__0(IApplicationBuilder builder)
at Microsoft.AspNetCore.Hosting.GenericWebHostBuilder.<>c__DisplayClass13_0.<UseStartup>b__2(IApplicationBuilder app)
at Microsoft.AspNetCore.Mvc.Filters.MiddlewareFilterBuilderStartupFilter.<>c__DisplayClass0_0.<Configure>g__MiddlewareFilterBuilder|0(IApplicationBuilder builder)
at Microsoft.AspNetCore.HostFilteringStartupFilter.<>c__DisplayClass0_0.<Configure>b__0(IApplicationBuilder app)
at Microsoft.AspNetCore.Hosting.GenericWebHostService.StartAsync(CancellationToken cancellationToken)
at Microsoft.Extensions.Hosting.Internal.Host.StartAsync(CancellationToken cancellationToken)
at Microsoft.Extensions.Hosting.HostingAbstractionsHostExtensions.RunAsync(IHost host,CancellationToken token)
at Microsoft.Extensions.Hosting.HostingAbstractionsHostExtensions.RunAsync(IHost host,CancellationToken token)
at Microsoft.Extensions.Hosting.HostingAbstractionsHostExtensions.Run(IHost host)
at Server.Program.Main(String[] args) in /src/Server/Program.cs:line 17
那么，在实际服务器中移动这两个容器后，如何连接这两个容器？
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