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https://github.com/seaweedfs/seaweedfs.git
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Chris LuandGitHub
7df43ad9b5
* admin: add connected mount clients page and dashboard section
The filer is the authority on who is subscribed to its metadata stream
(FUSE/VFS mounts, S3, peer filers, ...), but its in-memory listener
registry only tracked clientId->epoch and was not exposed.
- Enrich the filer subscriber registry with name/type/address/path/
connected-time, populated in addClient and cleared in deleteClient so
it reflects currently-connected clients only.
- Add a ListMetadataSubscribers filer gRPC (optional client-type filter).
- Admin server fans out to every filer, filters to mount types
("mount" Go weed mount, "sw-vfs" Rust VFS), and renders a new
Cluster > Mount Clients page plus a Mount Clients dashboard section.
Read-only; no behavior change to the subscribe hot path.
* admin: address review — parallelize filer fan-out, guard nil map, robust CSV
- GetMountClients now queries filers concurrently, each under a 5s
timeout, so a slow/unreachable filer can't stall the admin dashboard.
- Defensively initialize fs.subscribers before first write.
- Mount Clients CSV export uses a Blob with quote-escaping instead of a
data: URI, so special characters in paths export correctly.
81 lines
2.4 KiB
Go
81 lines
2.4 KiB
Go
package dash
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import (
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"context"
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"sort"
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"sync"
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"time"
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"github.com/seaweedfs/seaweedfs/weed/glog"
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"github.com/seaweedfs/seaweedfs/weed/pb"
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"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
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)
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// mountClientTypes are the metadata-subscriber client types that represent a
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// FUSE/VFS mount: the Go `weed mount` ("mount") and the Rust VFS ("sw-vfs").
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var mountClientTypes = []string{"mount", "sw-vfs"}
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// mountClientsFilerTimeout bounds each per-filer ListMetadataSubscribers call so
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// a slow or unreachable filer can't stall the admin dashboard.
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const mountClientsFilerTimeout = 5 * time.Second
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// GetMountClients queries every filer for its connected mount subscribers and
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// aggregates them. Each filer only knows the clients connected to itself, so a
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// cluster-wide view requires fanning out. The filers are queried concurrently,
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// each under a short timeout, and an unreachable filer is skipped.
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func (s *AdminServer) GetMountClients() (*MountClientsData, error) {
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var (
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mu sync.Mutex
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clients []MountClient
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wg sync.WaitGroup
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)
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for _, filerAddr := range s.GetAllFilers() {
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wg.Add(1)
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go func(filerAddr string) {
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defer wg.Done()
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ctx, cancel := context.WithTimeout(context.Background(), mountClientsFilerTimeout)
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defer cancel()
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err := pb.WithGrpcFilerClient(false, 0, pb.ServerAddress(filerAddr), s.grpcDialOption, func(client filer_pb.SeaweedFilerClient) error {
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resp, err := client.ListMetadataSubscribers(ctx, &filer_pb.ListMetadataSubscribersRequest{
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ClientTypes: mountClientTypes,
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})
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if err != nil {
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return err
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}
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mu.Lock()
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for _, sub := range resp.Subscribers {
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clients = append(clients, MountClient{
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ClientName: sub.ClientName,
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ClientType: sub.ClientType,
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Address: sub.Address,
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PathPrefix: sub.PathPrefix,
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ClientId: sub.ClientId,
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ConnectedAt: time.Unix(0, sub.ConnectedAtNs),
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FilerAddress: sub.FilerAddress,
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})
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}
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mu.Unlock()
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return nil
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})
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if err != nil {
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glog.Warningf("list mount clients from filer %s: %v", filerAddr, err)
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}
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}(filerAddr)
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}
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wg.Wait()
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sort.Slice(clients, func(i, j int) bool {
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if clients[i].Address != clients[j].Address {
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return clients[i].Address < clients[j].Address
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}
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return clients[i].PathPrefix < clients[j].PathPrefix
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})
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return &MountClientsData{
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MountClients: clients,
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TotalMountClients: len(clients),
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LastUpdated: time.Now(),
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}, nil
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}
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