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package info
import (
"context"
"fmt"
"gitlab.com/gitlab-org/gitaly/v15/internal/praefect/config"
"gitlab.com/gitlab-org/gitaly/v15/internal/structerr"
"gitlab.com/gitlab-org/gitaly/v15/proto/go/gitalypb"
"golang.org/x/sync/errgroup"
)
// RepositoryReplicas returns a list of repositories that includes the checksum of the primary as well as the replicas
func (s *Server) RepositoryReplicas(ctx context.Context, in *gitalypb.RepositoryReplicasRequest) (*gitalypb.RepositoryReplicasResponse, error) {
virtualStorage := in.GetRepository().GetStorageName()
relativePath := in.GetRepository().GetRelativePath()
repositoryID, err := s.rs.GetRepositoryID(ctx, virtualStorage, relativePath)
if err != nil {
return nil, fmt.Errorf("get repository id: %q", err)
}
primary, err := s.primaryGetter.GetPrimary(ctx, virtualStorage, repositoryID)
if err != nil {
return nil, fmt.Errorf("get primary: %w", err)
}
assignments, err := s.assignmentStore.GetHostAssignments(ctx, virtualStorage, repositoryID)
if err != nil {
return nil, fmt.Errorf("get host assignments: %w", err)
}
replicaPath := relativePath
if s.conf.Failover.ElectionStrategy == config.ElectionStrategyPerRepository {
replicaPath, err = s.rs.GetReplicaPath(ctx, repositoryID)
if err != nil {
return nil, fmt.Errorf("get replica path: %w", err)
}
}
secondaries := make([]string, 0, len(assignments)-1)
primaryIsAssigned := false
for _, assignment := range assignments {
if primary == assignment {
primaryIsAssigned = true
continue
}
secondaries = append(secondaries, assignment)
}
if !primaryIsAssigned {
return nil, fmt.Errorf("primary %q is not an assigned host", primary)
}
var resp gitalypb.RepositoryReplicasResponse
if resp.Primary, err = s.getRepositoryDetails(ctx, virtualStorage, primary, relativePath, replicaPath); err != nil {
return nil, structerr.NewInternal("%w", err)
}
resp.Replicas = make([]*gitalypb.RepositoryReplicasResponse_RepositoryDetails, len(secondaries))
g, ctx := errgroup.WithContext(ctx)
for i, storage := range secondaries {
i := i // rescoping
storage := storage // rescoping
g.Go(func() error {
var err error
resp.Replicas[i], err = s.getRepositoryDetails(ctx, virtualStorage, storage, relativePath, replicaPath)
return err
})
}
if err := g.Wait(); err != nil {
return nil, structerr.NewInternal("%w", err)
}
return &resp, nil
}
func (s *Server) getRepositoryDetails(ctx context.Context, virtualStorage, storage, relativePath, replicaPath string) (*gitalypb.RepositoryReplicasResponse_RepositoryDetails, error) {
conn, ok := s.conns[virtualStorage][storage]
if !ok {
return nil, fmt.Errorf("no connection to %q/%q", virtualStorage, storage)
}
resp, err := gitalypb.NewRepositoryServiceClient(conn).CalculateChecksum(ctx,
&gitalypb.CalculateChecksumRequest{
Repository: &gitalypb.Repository{
StorageName: storage,
RelativePath: replicaPath,
},
})
if err != nil {
return nil, err
}
return &gitalypb.RepositoryReplicasResponse_RepositoryDetails{
Repository: &gitalypb.Repository{
StorageName: storage,
RelativePath: relativePath,
},
Checksum: resp.GetChecksum(),
}, nil
}
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