I'm trying to make some S3 queries to Localstack by using the AWS C++ SDK. I've followed the examples provided by AWS in C++ in order to, for instance, list my buckets, but without any luck.
I share the C++ class I've made to achieve this:
class AWSwrapper
{
public:
// Class members
Aws::SDKOptions m_sdkOptions;
std::unique_ptr<Aws::Client::ClientConfiguration> m_spClientConfig;
// Class constructor
AWSwrapper()
{
m_sdkOptions.loggingOptions.logLevel = Aws::Utils::Logging::LogLevel::Debug;
Aws::InitAPI(m_sdkOptions);
m_spClientConfig = std::make_unique<Aws::Client::ClientConfiguration>();
m_spClientConfig->endpointOverride = Aws::String("127.0.0.1:4566");
m_spClientConfig->scheme = Aws::Http::Scheme::HTTP;
}
// Class destructor
~AWSwrapper()
{
Aws::ShutdownAPI(m_sdkOptions);
}
// List available buckets
std::vector<std::string> listBuckets()
{
Aws::S3::S3Client client {*m_spClientConfig};
const auto outcome {client.ListBuckets()};
if (outcome.IsSuccess())
{
std::vector<std::string> bucketsList;
for (auto &&bucket: outcome.GetResult().GetBuckets())
{
bucketsList.push_back(bucket.GetName());
}
return bucketsList;
}
throw std::runtime_error {std::string("Couldn't list buckets: ") + outcome.GetError().GetMessage()};
}
};
Calling listBuckets will return an empty vector:
AWSwrapper wrapper;
const auto bucketsList {wrapper.listBuckets()};
The Localstack output when running my program:
2023年05月30日T07:55:20.889 INFO --- [ asgi_gw_0] localstack.request.http : GET / => 200`
The Localstack output when calling awslocal s3api list-buckets:
2023年05月30日T08:02:33.610 INFO --- [ asgi_gw_0] localstack.request.aws : AWS s3.ListBuckets => 200
{
"Buckets": [
{
"Name": "test-bucket",
"CreationDate": "2023年05月30日T07:04:23Z"
}
],
"Owner": {
"DisplayName": "webfile",
"ID": "75aa57f09aa0c8caeab4f8c24e99d10f8e7faeebf76c078efc7c6caea54ba06a"
}
}
Finally, this is a piece of the AWS SDK log output that may be relevant:
[DEBUG] 2023年05月30日 08:07:45.724 CURL [140534065837120] (Text) Trying 169.254.169.254:80...
[DEBUG] 2023年05月30日 08:07:45.776 CURL [140534065837120] (Text) connect to 169.254.169.254 port 80 failed: No route to host
[DEBUG] 2023年05月30日 08:07:45.776 CURL [140534065837120] (Text) Failed to connect to 169.254.169.254 port 80 after 51 ms: No route to host
[DEBUG] 2023年05月30日 08:07:45.776 CURL [140534065837120] (Text) Closing connection 0
[ERROR] 2023年05月30日 08:07:45.776 CurlHttpClient [140534065837120] Curl returned error code 7 - Couldn't connect to server
[DEBUG] 2023年05月30日 08:07:45.776 CurlHandleContainer [140534065837120] Destroy curl handle: 0x559dfbf6f380
[DEBUG] 2023年05月30日 08:07:45.776 CurlHandleContainer [140534065837120] Created replacement handle and released to pool: 0x559dfbf6f380
[ERROR] 2023年05月30日 08:07:45.776 EC2MetadataClient [140534065837120] Http request to retrieve credentials failed
[ERROR] 2023年05月30日 08:07:45.776 EC2MetadataClient [140534065837120] Can not retrieve resource from http://169.254.169.254/latest/meta-data/iam/security-credentials
[INFO] 2023年05月30日 08:07:45.776 Aws::Config::AWSProfileConfigLoaderBase [140534065837120] Failed to reload configuration.
[DEBUG] 2023年05月30日 08:07:45.776 AWSClient [140534065837120] Request Successfully signed
[DEBUG] 2023年05月30日 08:07:45.776 CurlHandleContainer [140534065837120] Attempting to acquire curl connection.
[DEBUG] 2023年05月30日 08:07:45.776 CurlHandleContainer [140534065837120] No current connections available in pool. Attempting to create new connections.
[DEBUG] 2023年05月30日 08:07:45.776 CurlHandleContainer [140534065837120] attempting to grow pool size by 2
[INFO] 2023年05月30日 08:07:45.776 CurlHandleContainer [140534065837120] Pool grown by 2
[DEBUG] 2023年05月30日 08:07:45.776 CurlHandleContainer [140534065837120] Connection has been released. Continuing.
[DEBUG] 2023年05月30日 08:07:45.776 CurlHandleContainer [140534065837120] Returning connection handle 0x559dfc0c8080
[DEBUG] 2023年05月30日 08:07:45.776 CurlHttpClient [140534065837120] Obtained connection handle 0x559dfc0c8080
[DEBUG] 2023年05月30日 08:07:45.776 CURL [140534065837120] (Text) Trying 127.0.0.1:4566...
[DEBUG] 2023年05月30日 08:07:45.777 CURL [140534065837120] (Text) Connected to 127.0.0.1 (127.0.0.1) port 4566 (#0)
[DEBUG] 2023年05月30日 08:07:45.777 CURL [140534065837120] (HeaderOut) GET / HTTP/1.1
Host: 127.0.0.1:4566
Accept: */*
Connection: Upgrade, HTTP2-Settings
Upgrade: h2c
HTTP2-Settings: AAMAAABkAAQCAAAAAAIAAAAA
amz-sdk-invocation-id: 9BCC97C1-2735-45C3-8FD4-94DB00D0BF3E
amz-sdk-request: attempt=1
user-agent: aws-sdk-cpp/1.11.84 Linux/6.2.6-76060206-generic x86_64 GCC/11.3.0
[DEBUG] 2023年05月30日 08:07:45.780 CURL [140534065837120] (Text) Mark bundle as not supporting multiuse
[DEBUG] 2023年05月30日 08:07:45.780 CURL [140534065837120] (HeaderIn) HTTP/1.1 101
[DEBUG] 2023年05月30日 08:07:45.780 CURL [140534065837120] (HeaderIn) date: 2023年5月30日 08:07:45 GMT
[DEBUG] 2023年05月30日 08:07:45.780 CURL [140534065837120] (HeaderIn) server: hypercorn-h11
[DEBUG] 2023年05月30日 08:07:45.780 CURL [140534065837120] (HeaderIn) connection: upgrade
[DEBUG] 2023年05月30日 08:07:45.780 CURL [140534065837120] (HeaderIn) upgrade: h2c
[DEBUG] 2023年05月30日 08:07:45.780 CURL [140534065837120] (Text) Received 101
[DEBUG] 2023年05月30日 08:07:45.780 CURL [140534065837120] (Text) Using HTTP2, server supports multiplexing
[DEBUG] 2023年05月30日 08:07:45.780 CURL [140534065837120] (Text) Connection state changed (HTTP/2 confirmed)
[DEBUG] 2023年05月30日 08:07:45.780 CURL [140534065837120] (Text) Copying HTTP/2 data in stream buffer to connection buffer after upgrade: len=0
[DEBUG] 2023年05月30日 08:07:45.824 CURL [140534065837120] (HeaderIn) HTTP/2 200
[DEBUG] 2023年05月30日 08:07:45.824 CURL [140534065837120] (HeaderIn) content-type: text/plain; charset=utf-8
[DEBUG] 2023年05月30日 08:07:45.824 CURL [140534065837120] (HeaderIn) access-control-allow-origin: *
[DEBUG] 2023年05月30日 08:07:45.824 CURL [140534065837120] (HeaderIn) access-control-allow-methods: HEAD,GET,PUT,POST,DELETE,OPTIONS,PATCH
[DEBUG] 2023年05月30日 08:07:45.824 CURL [140534065837120] (HeaderIn) access-control-allow-headers: authorization,cache-control,content-length,content-md5,content-type,etag,location,x-amz-acl,x-amz-content-sha256,x-amz-date,x-amz-request-id,x-amz-security-token,x-amz-tagging,x-amz-target,x-amz-user-agent,x-amz-version-id,x-amzn-requestid,x-localstack-target,amz-sdk-invocation-id,amz-sdk-request
[DEBUG] 2023年05月30日 08:07:45.824 CURL [140534065837120] (HeaderIn) access-control-expose-headers: etag,x-amz-version-id
[DEBUG] 2023年05月30日 08:07:45.824 CURL [140534065837120] (HeaderIn) content-length: 0
[DEBUG] 2023年05月30日 08:07:45.824 CURL [140534065837120] (HeaderIn) date: 2023年5月30日 08:07:45 GMT
[DEBUG] 2023年05月30日 08:07:45.824 CURL [140534065837120] (HeaderIn) server: hypercorn-h2
[DEBUG] 2023年05月30日 08:07:45.824 CURL [140534065837120] (HeaderIn)
[DEBUG] 2023年05月30日 08:07:45.824 CURL [140534065837120] (DataIn)
[DEBUG] 2023年05月30日 08:07:45.824 CURL [140534065837120] (Text) Connection #0 to host 127.0.0.1 left intact
[DEBUG] 2023年05月30日 08:07:45.824 CurlHttpClient [140534065837120] Returned http response code 200
[DEBUG] 2023年05月30日 08:07:45.824 CurlHttpClient [140534065837120] Returned content type text/plain; charset=utf-8
[DEBUG] 2023年05月30日 08:07:45.824 CurlHttpClient [140534065837120] Releasing curl handle 0x559dfc0c8080
[DEBUG] 2023年05月30日 08:07:45.824 CurlHandleContainer [140534065837120] Releasing curl handle 0x559dfc0c8080
[DEBUG] 2023年05月30日 08:07:45.824 CurlHandleContainer [140534065837120] Notified waiting threads.
What am I missing here?
FYI: Localstack v2.0.2 and aws-sdk-cpp v1.11.84.
asked May 30, 2023 at 8:12
tsarquis88
5852 gold badges6 silver badges16 bronze badges
1 Answer 1
So I managed to solve this by adding a dummy credential file in ~/.aws/credentials with the following content:
[default]
aws_access_key_id=test
aws_secret_access_key=test
[admin]
aws_access_key_id=test
aws_secret_access_key=test
answered May 30, 2023 at 8:22
tsarquis88
5852 gold badges6 silver badges16 bronze badges
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