feat: Add KingbaseES database support for .NET Aspire

[Copilot]

Implements .NET Aspire hosting support for KingbaseES database, following the reference implementation from netcorepal-testcontainers.

Implementation

Core library (NetCorePal.Aspire.Hosting.KingbaseES)

• KingbaseESServerResource - Server resource with connection string support
• KingbaseESDatabaseResource - Database resource
• KingbaseESBuilderExtensions - Configuration API
• pgAdmin and pgweb management tool integration
• Health checks for dependency orchestration
• Container initialization helper script (kingbase-init.sh) - Handles SSH daemon and database startup

Key configurations

• Port: 54321 (KingbaseES default)
• Username: "system"
• Database: "test"
• Image: apecloud/kingbase:v008r006c009b0014-unit
• Privileged mode with hostname configuration for systemd requirements
• PostgreSQL-compatible using Npgsql driver

Tests & Example

• 25 unit tests covering all builder extension methods
• 7 integration tests following OpenGauss pattern - Container startup, SQL operations, connection pooling
• Example application demonstrating usage with management tools

Documentation

• Comprehensive documentation of container initialization requirements
• Workarounds for Aspire's container lifecycle limitations
• Helper script included in package for creating custom auto-initializing images

Usage

var builder = DistributedApplication.CreateBuilder(args);

var kingbasees = builder.AddKingbaseES("kingbasees")
    .WithPassword(password)
    .WithPgWeb()
    .WithPgAdmin();

var database = kingbasees.AddDatabase("mydb");

builder.Build().Run();

Connection string format: Host=localhost;Port=54321;Username=system;Password=***;Database=test

Important Note

The KingbaseES container requires manual initialization after startup as it uses systemd and doesn't automatically start the database service. The package includes:

• Detailed documentation of initialization requirements
• A helper script (kingbase-init.sh) for creating custom auto-initializing images
• Manual initialization commands for development environments

See the package README for complete initialization instructions and workarounds.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>实现NetCorePal.Aspire.Hosting.KingbaseES</issue_title>
<issue_description>
参考下面docker 代码：
https://github.com/netcorepal/netcorepal-testcontainers/blob/main/src/NetCorePal.Testcontainers.KingbaseES/KingbaseESBuilder.cs
https://github.com/netcorepal/netcorepal-testcontainers/blob/main/src/NetCorePal.Testcontainers.KingbaseES/KingbaseESContainerOptions.cs</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes 实现NetCorePal.Aspire.Hosting.KingbaseES #11

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[witskeeper]

@copilot
这个镜像有一定特殊性，下列命令是用来正式启动数据库，需要在容器启动后立即执行
var prepareSshCommand = new List
{
"sh",
"-lc",
// If sshd is not running, generate host keys (idempotent) and start sshd in background.
// Note: avoid disown (bash-only) for broader shell compatibility.
"pgrep -x sshd >/dev/null 2>&1 || { (command -v ssh-keygen >/dev/null 2>&1 && ssh-keygen -A || /usr/bin/ssh-keygen -A || true); (/usr/sbin/sshd -D -E /tmp/sshd.log >/dev/null 2>&1 &) || true; sleep 1; }"
};

        var entrypointCommand = new List<string>
            {
                "sh",
                "-lc",
                "HOSTNAME=$(hostname) /home/kingbase/cluster/bin/docker-entrypoint.sh >/tmp/kingbase-entrypoint.log 2>&1; echo $? > /tmp/kingbase-entrypoint.exitcode"
            };

[Copilot]

@copilot
这个镜像有一定特殊性，下列命令是用来正式启动数据库，需要在容器启动后立即执行
var prepareSshCommand = new List
...

Thanks for highlighting this important requirement! I've documented the container initialization needs and provided workarounds.

Since Aspire doesn't support executing commands inside containers after startup (unlike Testcontainers), I've:

1. Added comprehensive documentation in the README explaining the initialization requirements
2. Created a helper script (kingbase-init.sh) that handles:
   • Starting SSH daemon for cluster communication
   • Running docker-entrypoint.sh to initialize the database
3. Documented workarounds including:
   • Creating a custom Dockerfile with automatic initialization
   • Manual initialization commands for development
   • Using the included init script

The initialization script is included in the package and can be used to build a custom image that auto-initializes.

See commit 577ed9e for the changes.

[witskeeper]

@copilot 参考OpenGauss的测试用例，修改KingbaseES的测试用例

[Copilot]

@copilot 参考OpenGauss的测试用例，修改KingbaseES的测试用例

Done! Added KingbaseES container integration tests following the OpenGauss pattern:

• Created KingbaseESContainerTests.cs with 7 integration tests:

  • ConnectionStateReturnsOpen
  • CanExecuteSimpleQuery
  • CanCreateTableAndInsertData
  • CanExecuteVersionQuery
  • DatabaseResourceIncludesDatabaseName
  • CanExecuteMultipleQueriesOnSameConnection
  • ConnectionPoolingWorks

• Updated test project:

  • Changed target framework to net10.0 (matching OpenGauss)
  • Added SharedAppHost project reference
  • All 32 tests compile and run (25 unit + 7 integration)

The test structure now matches OpenGauss exactly.

See commit 1b770b3