英文:
Asp.net Core HealthChecks : AddDbContextCheck HealthReportEntry description and exception are empty when Unhealthy
问题
我在我的应用程序中使用了asp.net core HealthCheck。
我使用了microsoft.extensions.diagnostics.healthchecks.entityframeworkcore包和AddDbContextCheck<MyDbContext>()扩展方法来添加对我的DbContext的健康检查。
当此检查的状态为"Unhealthy"时，我没有反馈是什么错误...
其他健康检查在每个HealthReport的HealthReportEntry的描述和/或异常字段中添加了错误信息。
我如何获取entityframeworkcore healthcheck的Unhealthy状态的详细错误信息？
谢谢
英文:
I use asp.net core HealthCheck in my application.
I use microsoft.extensions.diagnostics.healthchecks.entityframeworkcore package and AddDbContextCheck<MyDbContext>() extension method to add healthcheck on my DbContext.
When the state of this check is "Unhealthy" I've no feedback what is the error...
Other HealthChecks add error information in description and/or exception field of each HealthReportEntry of HealthReport
How can I have the detail error information of Unhealthy status for entityframeworkcore healthcheck ?
Thanks
答案1
得分: 2
以下是已翻译的内容：
"据我所知，默认情况下 AddDbContextCheck 方法不包含详细的错误信息。如果需要更多信息，可以实现自定义健康检查类，如下所示："
public class DbContextHealthCheck<TContext>
: IHealthCheck where TContext : DbContext
{
private readonly TContext _dbContext;
public DbContextHealthCheck(TContext dbContext)
{
_dbContext = dbContext;
}
public async Task<HealthCheckResult> CheckHealthAsync(
HealthCheckContext context,
CancellationToken cancellationToken = default)
{
try
{
// 在您的 DbContext 上执行测试查询或操作
// 例如，您可以执行类似于以下的简单查询：
await _dbContext.Database.CanConnectAsync(cancellationToken);
// DbContext 健康
return HealthCheckResult.Healthy();
}
catch (Exception ex)
{
// 如果抛出异常，将带有错误详细信息的不健康结果返回
return HealthCheckResult.Unhealthy("DbContext 连接测试失败", ex);
}
}
}
然后，在应用程序启动时注册健康检查：
services.AddDbContext<YourDbContext>();
services.AddHealthChecks()
.AddCheck<DbContextHealthCheck<YourDbContext>>("your_dbcontext_health_check");
如果您想添加更多功能，您可以使用**此链接**了解有关实现自定义健康检查的更多信息。
英文:
As I know the AddDbContextCheck method by default does not include detailed error information, If you need more information implement you custom health check class like below:
public class DbContextHealthCheck<TContext>
: IHealthCheck where TContext : DbContext
{
private readonly TContext _dbContext;
public DbContextHealthCheck(TContext dbContext)
{
_dbContext = dbContext;
}
public async Task<HealthCheckResult> CheckHealthAsync(
HealthCheckContext context,
CancellationToken cancellationToken = default)
{
try
{
// Perform a test query or operation on your DbContext
// For example, you can execute a simple query like this:
await _dbContext.Database.CanConnectAsync(cancellationToken);
// DbContext is healthy
return HealthCheckResult.Healthy();
}
catch (Exception ex)
{
// If an exception is thrown, return an unhealthy result with the error details
return HealthCheckResult.Unhealthy("DbContext connection test failed", ex);
}
}
}
And then register health check in application startup
services.AddDbContext<YourDbContext>();
services.AddHealthChecks()
.AddCheck<DbContextHealthCheck<YourDbContext>>("your_dbcontext_health_check");
If you would like to add more features you can use this link to read more about implementing custom health check
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