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syntax = "proto3";
package gitaly;
import "lint.proto";
import "shared.proto";
option go_package = "gitlab.com/gitlab-org/gitaly/v14/proto/go/gitalypb";
// RefTransaction is a service which provides RPCs to interact with reference
// transactions. Reference transactions are used in the context of Gitaly
// Cluster to ensure that all nodes part of a single transaction perform the
// same change: given a set of changes, the changes are hashed and the hash is
// then voted on.
service RefTransaction {
option (intercepted) = true;
// VoteTransaction casts a vote on a transaction to establish whether the
// node is doing the same change as all the other nodes part of the
// transaction. This RPC blocks until quorum has been reached, which may be
// _before_ all nodes have cast a vote.
//
// This RPC may return one of the following error codes:
//
// - `NotFound` in case the transaction could not be found.
// - `Canceled` in case the transaction has been canceled before quorum was
// reached.
rpc VoteTransaction (VoteTransactionRequest) returns (VoteTransactionResponse);
// StopTransaction gracefully stops a transaction. This RPC can be used if
// only a subset of nodes executes specific code which may cause the
// transaction to fail. One such example is Git hooks, which only execute on
// the primary Gitaly noded. Other nodes which vote on this transaction will
// get a response with the `STOP` state being set.
//
// This RPC may return one of the following error codes:
//
// - `NotFound` in case the transaction could not be found.
// - `Canceled` in case the transaction has been canceled before quorum was
// reached.
rpc StopTransaction (StopTransactionRequest) returns (StopTransactionResponse);
}
message VoteTransactionRequest {
enum Phase {
// UNKNOWN_PHASE is the unknown voting phase. This value has been the
// default because phases have been introduced. Eventually, using this
// phase will become unsupported.
UNKNOWN_PHASE = 0;
// PREPARED_PHASE is the prepratory phase. The data that is about to change
// is locked for concurrent modification, but changes have not yet been
// written to disk.
PREPARED_PHASE = 1;
// COMMITTED_PHASE is the committing phase. Data has been committed to disk
// and will be visible in all subsequent requests.
COMMITTED_PHASE = 2;
};
Repository repository = 1[(target_repository)=true];
// ID of the transaction we're processing
uint64 transaction_id = 2;
// Name of the Gitaly node that's voting on a transaction.
string node = 3;
// SHA1 of the references that are to be updated
bytes reference_updates_hash = 4;
// Phase is the voting phase.
Phase phase = 5;
}
message VoteTransactionResponse {
// The outcome of the given transaction telling the client whether the
// transaction should be committed or rolled back.
enum TransactionState {
COMMIT = 0;
ABORT = 1;
STOP = 2;
}
TransactionState state = 1;
}
message StopTransactionRequest {
Repository repository = 1[(target_repository)=true];
// ID of the transaction we're processing
uint64 transaction_id = 2;
}
message StopTransactionResponse {
}
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