英文:
Can we configure retry attempts on AWS Go SDK service calls
问题
AWS默认提供服务调用的重试支持，通常设置为最多3次尝试。
我们可以配置重试对象以将重试尝试次数设置为5吗？
英文:
AWS by default provides retries support on its service calls, which is usually set to a max of 3 attempts.
Can we configure the retry object to set retry attempts to 5?
答案1
得分: 1
你可以为SDK定义一个自定义重试策略：
func main() {
sess := session.Must(
session.NewSession(&aws.Config{
// 使用自定义的重试器提供自定义的重试规则。
Retryer: CustomRetryer{
DefaultRetryer: client.DefaultRetryer{
NumMaxRetries: client.DefaultRetryerMaxNumRetries,
},
},
// 直接使用SDK的SharedCredentialsProvider而不是SDK的默认凭证链。
// 这确保应用程序可以调用Config.Credentials.Expire。
// 这与SDK的默认凭证链相反，后者永远不会重新读取共享凭证文件。
Credentials: credentials.NewCredentials(&credentials.SharedCredentialsProvider{
Filename: defaults.SharedCredentialsFilename(),
Profile: "default",
}),
Region: aws.String(endpoints.UsWest2RegionID),
}),
)
// 向AfterRetry处理程序堆栈添加一个请求处理程序，该处理程序在SDK确定是否重试后执行。
// 此处理程序强制SDK的凭证过期，并且下一次调用Credentials.Get将尝试刷新凭证。
sess.Handlers.AfterRetry.PushBack(func(req *request.Request) {
if aerr, ok := req.Error.(awserr.RequestFailure); ok && aerr != nil {
if aerr.Code() == "InvalidClaimException" {
// 根据错误代码强制凭证过期。下一次调用Credentials.Get将尝试刷新凭证。
req.Config.Credentials.Expire()
}
}
})
}
英文:
you can define a custom retry strategy for the SDK to use:
func main() {
sess := session.Must(
session.NewSession(&aws.Config{
// Use a custom retryer to provide custom retry rules.
Retryer: CustomRetryer{
DefaultRetryer: client.DefaultRetryer{
NumMaxRetries: client.DefaultRetryerMaxNumRetries,
}},
// Use the SDK's SharedCredentialsProvider directly instead of the
// SDK's default credential chain. This ensures that the
// application can call Config.Credentials.Expire. This is counter
// to the SDK's default credentials chain, which will never reread
// the shared credentials file.
Credentials: credentials.NewCredentials(&credentials.SharedCredentialsProvider{
Filename: defaults.SharedCredentialsFilename(),
Profile: "default",
}),
Region: aws.String(endpoints.UsWest2RegionID),
}),
)
// Add a request handler to the AfterRetry handler stack that is used by the
// SDK to be executed after the SDK has determined if it will retry.
// This handler forces the SDK's Credentials to be expired, and next call to
// Credentials.Get will attempt to refresh the credentials.
sess.Handlers.AfterRetry.PushBack(func(req *request.Request) {
if aerr, ok := req.Error.(awserr.RequestFailure); ok && aerr != nil {
if aerr.Code() == "InvalidClaimException" {
// Force the credentials to expire based on error code. Next
// call to Credentials.Get will attempt to refresh credentials.
req.Config.Credentials.Expire()
}
}
})
答案2
得分: 1
是的，AWS提供了支持配置重试和超时功能的功能。以下是在AWS Golang SDK v2中将最大重试次数增加到5的两种方法：
- 在AWS Config对象cfg上配置重试逻辑，并可以通过NewFromConfig函数与各种AWS服务客户端一起使用
cfg, err := config.LoadDefaultConfig(context.TODO(), config.WithRetryer(func() aws.Retryer {
return retry.AddWithMaxAttempts(retry.NewStandard(), 5)
}))
client := s3.NewFromConfig(cfg)
- 仅为特定的AWS服务客户端配置重试逻辑
customRetry := retry.NewStandard(func(o *retry.StandardOptions) {
o.MaxAttempts = 5
})
sqsClient := sqs.NewFromConfig(creds,
func(o *sqs.Options) {
o.Retryer = customRetry
},
)
更多信息可以在以下网址找到：https://aws.github.io/aws-sdk-go-v2/docs/configuring-sdk/retries-timeouts/ 和 https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/aws/retry#hdr-Standard
英文:
Yes, AWS provides support to configure their retry and timeouts features. Here are two ways to increase the max number of retries to 5 in AWS Golang SDK v2:
- Configure the retry logic on the AWS Config object cfg and it can be used with various AWS service clients using NewFromConfig function
cfg, err := config.LoadDefaultConfig(context.TODO(), config.WithRetryer(func() aws.Retryer {
return retry.AddWithMaxAttempts(retry.NewStandard(), 5)
}))
client := s3.NewFromConfig(cfg)
- Configure the retry logic only for a specific AWS service client
customRetry := retry.NewStandard(func(o *retry.StandardOptions) {
o.MaxAttempts = 5
})
sqsClient := sqs.NewFromConfig(creds,
func(o *sqs.Options) {
o.Retryer = customRetry
},
)
More info can be found at https://aws.github.io/aws-sdk-go-v2/docs/configuring-sdk/retries-timeouts/ and https://pkg.go.dev/github.com/aws/aws-sdk-go-v2/aws/retry#hdr-Standard
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