unexpected DnsError returned by s3Client::list_objects_v2

[taoseng]

let shared_config = aws_config::from_env().load().await;
let config = s3::config::Builder::from(&shared_config)
    .endpoint_url(S3_ENDPOINT)
    .credentials_provider(Credentials::new(ACCESS_KEY_ID,SECRET_ACCESS_KEY,None,None, "simple"))
    .region(Region::new(REGION))
    .build();

let client = s3::Client::from_conf(config);

// list_buckets success and print all buckets
let buckets = client.list_buckets().send().await?;
for b in buckets.buckets().unwrap_or_default() {
    println!("BUCKET: {}",b.name().unwrap_or_default());
}

// but list_objects_v2 failed with error:
// Error: Unhandled(Unhandled { source: DispatchFailure(DispatchFailure { source: ConnectorError 
// { kind: Io, source: hyper::Error(Connect, ConnectError("dns error", Custom { kind: Uncategorized, error: "failed to lookup address information: 
// Name or service not known" })) } }) })
let objects = client.list_objects_v2().bucket("my-bucket").send().await?;
println!("Objects in bucket:");
for obj in objects.contents().unwrap_or_default() {
    println!("{:?}", obj.key().unwrap());
}

[taoseng]

the "client.list_buckets()" call can sucess, but the next "list_objects_v2" call failed~~

[jdisanti]

A few questions:

• What version of the aws-sdk-s3?
• What is S3_ENDPOINT set to?
• Can you enable logging at the trace level and find the URL its trying to use when it fails?

[taoseng]

Thanks for your reply!

1. Versions:

aws-config = "0.54.1"
aws-sdk-s3 = "0.24.0"
tokio = { version = "1", features = ["full"] }
env_logger = "0.9.0"

2. S3_ENDPOINT likes "http://myhost"
3. i try the following command and never see the url

AWS_EC2_METADATA_DISABLED=true RUST_LOG=aws_config=trace cargo run

[taoseng]

Resolved, by enable 'force_path_style=true' in the configuration,
This configuration does not support set in SdkConfig, so it is necessary to modify the creation method of the Client object from
Client::new -> Client::from_ conf

[cdkirkwood]

Can you show how you did this?

[jdisanti]

Should be something along the lines of:

let sdk_config = aws_config::load_from_env().await;
let config = aws_sdk_s3::config::Builder::from(&sdk_config)
    .force_path_style(true)
    .build();
let client = aws_sdk_s3::Client::from_conf(config);

[cdkirkwood]

That worked, thank you!

[github-actions[bot]]

Hello! Reopening this discussion to make it searchable.