forked from lix-project/lix
254 lines
7.8 KiB
C++
254 lines
7.8 KiB
C++
#include "s3-binary-cache-store.hh"
|
||
#include "nar-info.hh"
|
||
#include "nar-info-disk-cache.hh"
|
||
#include "globals.hh"
|
||
|
||
#include <aws/core/client/ClientConfiguration.h>
|
||
#include <aws/s3/S3Client.h>
|
||
#include <aws/s3/model/CreateBucketRequest.h>
|
||
#include <aws/s3/model/GetBucketLocationRequest.h>
|
||
#include <aws/s3/model/GetObjectRequest.h>
|
||
#include <aws/s3/model/HeadObjectRequest.h>
|
||
#include <aws/s3/model/PutObjectRequest.h>
|
||
#include <aws/s3/model/ListObjectsRequest.h>
|
||
|
||
namespace nix {
|
||
|
||
struct S3Error : public Error
|
||
{
|
||
Aws::S3::S3Errors err;
|
||
S3Error(Aws::S3::S3Errors err, const FormatOrString & fs)
|
||
: Error(fs), err(err) { };
|
||
};
|
||
|
||
/* Helper: given an Outcome<R, E>, return R in case of success, or
|
||
throw an exception in case of an error. */
|
||
template<typename R, typename E>
|
||
R && checkAws(const FormatOrString & fs, Aws::Utils::Outcome<R, E> && outcome)
|
||
{
|
||
if (!outcome.IsSuccess())
|
||
throw S3Error(
|
||
outcome.GetError().GetErrorType(),
|
||
fs.s + ": " + outcome.GetError().GetMessage());
|
||
return outcome.GetResultWithOwnership();
|
||
}
|
||
|
||
struct S3BinaryCacheStoreImpl : public S3BinaryCacheStore
|
||
{
|
||
std::string bucketName;
|
||
|
||
ref<Aws::Client::ClientConfiguration> config;
|
||
ref<Aws::S3::S3Client> client;
|
||
|
||
Stats stats;
|
||
|
||
S3BinaryCacheStoreImpl(std::shared_ptr<Store> localStore,
|
||
const StoreParams & params, const std::string & bucketName)
|
||
: S3BinaryCacheStore(localStore, params)
|
||
, bucketName(bucketName)
|
||
, config(makeConfig())
|
||
, client(make_ref<Aws::S3::S3Client>(*config))
|
||
{
|
||
diskCache = getNarInfoDiskCache();
|
||
}
|
||
|
||
std::string getUri()
|
||
{
|
||
return "s3://" + bucketName;
|
||
}
|
||
|
||
ref<Aws::Client::ClientConfiguration> makeConfig()
|
||
{
|
||
auto res = make_ref<Aws::Client::ClientConfiguration>();
|
||
res->region = Aws::Region::US_EAST_1; // FIXME: make configurable
|
||
res->requestTimeoutMs = 600 * 1000;
|
||
return res;
|
||
}
|
||
|
||
void init()
|
||
{
|
||
if (!diskCache->cacheExists(getUri())) {
|
||
|
||
/* Create the bucket if it doesn't already exists. */
|
||
// FIXME: HeadBucket would be more appropriate, but doesn't return
|
||
// an easily parsed 404 message.
|
||
auto res = client->GetBucketLocation(
|
||
Aws::S3::Model::GetBucketLocationRequest().WithBucket(bucketName));
|
||
|
||
if (!res.IsSuccess()) {
|
||
if (res.GetError().GetErrorType() != Aws::S3::S3Errors::NO_SUCH_BUCKET)
|
||
throw Error(format("AWS error checking bucket ‘%s’: %s") % bucketName % res.GetError().GetMessage());
|
||
|
||
checkAws(format("AWS error creating bucket ‘%s’") % bucketName,
|
||
client->CreateBucket(
|
||
Aws::S3::Model::CreateBucketRequest()
|
||
.WithBucket(bucketName)
|
||
.WithCreateBucketConfiguration(
|
||
Aws::S3::Model::CreateBucketConfiguration()
|
||
/* .WithLocationConstraint(
|
||
Aws::S3::Model::BucketLocationConstraint::US) */ )));
|
||
}
|
||
|
||
BinaryCacheStore::init();
|
||
|
||
diskCache->createCache(getUri());
|
||
}
|
||
}
|
||
|
||
const Stats & getS3Stats()
|
||
{
|
||
return stats;
|
||
}
|
||
|
||
/* This is a specialisation of isValidPath() that optimistically
|
||
fetches the .narinfo file, rather than first checking for its
|
||
existence via a HEAD request. Since .narinfos are small, doing
|
||
a GET is unlikely to be slower than HEAD. */
|
||
bool isValidPathUncached(const Path & storePath)
|
||
{
|
||
try {
|
||
queryPathInfo(storePath);
|
||
return true;
|
||
} catch (InvalidPath & e) {
|
||
return false;
|
||
}
|
||
}
|
||
|
||
bool fileExists(const std::string & path)
|
||
{
|
||
stats.head++;
|
||
|
||
auto res = client->HeadObject(
|
||
Aws::S3::Model::HeadObjectRequest()
|
||
.WithBucket(bucketName)
|
||
.WithKey(path));
|
||
|
||
if (!res.IsSuccess()) {
|
||
auto & error = res.GetError();
|
||
if (error.GetErrorType() == Aws::S3::S3Errors::UNKNOWN // FIXME
|
||
&& error.GetMessage().find("404") != std::string::npos)
|
||
return false;
|
||
throw Error(format("AWS error fetching ‘%s’: %s") % path % error.GetMessage());
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
void upsertFile(const std::string & path, const std::string & data)
|
||
{
|
||
auto request =
|
||
Aws::S3::Model::PutObjectRequest()
|
||
.WithBucket(bucketName)
|
||
.WithKey(path);
|
||
|
||
auto stream = std::make_shared<std::stringstream>(data);
|
||
|
||
request.SetBody(stream);
|
||
|
||
stats.put++;
|
||
stats.putBytes += data.size();
|
||
|
||
auto now1 = std::chrono::steady_clock::now();
|
||
|
||
auto result = checkAws(format("AWS error uploading ‘%s’") % path,
|
||
client->PutObject(request));
|
||
|
||
auto now2 = std::chrono::steady_clock::now();
|
||
|
||
auto duration = std::chrono::duration_cast<std::chrono::milliseconds>(now2 - now1).count();
|
||
|
||
printMsg(lvlInfo, format("uploaded ‘s3://%1%/%2%’ (%3% bytes) in %4% ms")
|
||
% bucketName % path % data.size() % duration);
|
||
|
||
stats.putTimeMs += duration;
|
||
}
|
||
|
||
std::shared_ptr<std::string> getFile(const std::string & path)
|
||
{
|
||
debug(format("fetching ‘s3://%1%/%2%’...") % bucketName % path);
|
||
|
||
auto request =
|
||
Aws::S3::Model::GetObjectRequest()
|
||
.WithBucket(bucketName)
|
||
.WithKey(path);
|
||
|
||
request.SetResponseStreamFactory([&]() {
|
||
return Aws::New<std::stringstream>("STRINGSTREAM");
|
||
});
|
||
|
||
stats.get++;
|
||
|
||
try {
|
||
|
||
auto now1 = std::chrono::steady_clock::now();
|
||
|
||
auto result = checkAws(format("AWS error fetching ‘%s’") % path,
|
||
client->GetObject(request));
|
||
|
||
auto now2 = std::chrono::steady_clock::now();
|
||
|
||
auto res = dynamic_cast<std::stringstream &>(result.GetBody()).str();
|
||
|
||
auto duration = std::chrono::duration_cast<std::chrono::milliseconds>(now2 - now1).count();
|
||
|
||
printMsg(lvlTalkative, format("downloaded ‘s3://%1%/%2%’ (%3% bytes) in %4% ms")
|
||
% bucketName % path % res.size() % duration);
|
||
|
||
stats.getBytes += res.size();
|
||
stats.getTimeMs += duration;
|
||
|
||
return std::make_shared<std::string>(res);
|
||
|
||
} catch (S3Error & e) {
|
||
if (e.err == Aws::S3::S3Errors::NO_SUCH_KEY) return 0;
|
||
throw;
|
||
}
|
||
}
|
||
|
||
PathSet queryAllValidPaths() override
|
||
{
|
||
PathSet paths;
|
||
std::string marker;
|
||
|
||
do {
|
||
debug(format("listing bucket ‘s3://%s’ from key ‘%s’...") % bucketName % marker);
|
||
|
||
auto res = checkAws(format("AWS error listing bucket ‘%s’") % bucketName,
|
||
client->ListObjects(
|
||
Aws::S3::Model::ListObjectsRequest()
|
||
.WithBucket(bucketName)
|
||
.WithDelimiter("/")
|
||
.WithMarker(marker)));
|
||
|
||
auto & contents = res.GetContents();
|
||
|
||
debug(format("got %d keys, next marker ‘%s’")
|
||
% contents.size() % res.GetNextMarker());
|
||
|
||
for (auto object : contents) {
|
||
auto & key = object.GetKey();
|
||
if (!hasSuffix(key, ".narinfo")) continue;
|
||
paths.insert(settings.nixStore + "/" + std::string(key, 0, key.size() - 8));
|
||
}
|
||
|
||
marker = res.GetNextMarker();
|
||
} while (!marker.empty());
|
||
|
||
return paths;
|
||
}
|
||
|
||
};
|
||
|
||
static RegisterStoreImplementation regStore([](
|
||
const std::string & uri, const StoreParams & params)
|
||
-> std::shared_ptr<Store>
|
||
{
|
||
if (std::string(uri, 0, 5) != "s3://") return 0;
|
||
auto store = std::make_shared<S3BinaryCacheStoreImpl>(std::shared_ptr<Store>(0),
|
||
params, std::string(uri, 5));
|
||
store->init();
|
||
return store;
|
||
});
|
||
|
||
}
|