|
| 1 | +package v1 |
| 2 | + |
| 3 | +import ( |
| 4 | + "bytes" |
| 5 | + "context" |
| 6 | + "encoding/json" |
| 7 | + "errors" |
| 8 | + "fmt" |
| 9 | + "io" |
| 10 | + "net/http" |
| 11 | + "time" |
| 12 | + |
| 13 | + "github.com/NVIDIA/fleet-intelligence-sdk/pkg/server" |
| 14 | +) |
| 15 | + |
| 16 | +var ErrServerNotReady = errors.New("server not ready, timeout waiting") |
| 17 | + |
| 18 | +func CheckHealthz(ctx context.Context, addr string, opts ...OpOption) error { |
| 19 | + op := &Op{} |
| 20 | + if err := op.applyOpts(opts); err != nil { |
| 21 | + return err |
| 22 | + } |
| 23 | + |
| 24 | + req, err := http.NewRequestWithContext(ctx, http.MethodGet, fmt.Sprintf("%s/healthz", addr), nil) |
| 25 | + if err != nil { |
| 26 | + return fmt.Errorf("failed to create request: %w", err) |
| 27 | + } |
| 28 | + |
| 29 | + exp, err := json.Marshal(server.DefaultHealthz) |
| 30 | + if err != nil { |
| 31 | + return fmt.Errorf("failed to marshal expected healthz response: %w", err) |
| 32 | + } |
| 33 | + |
| 34 | + return checkHealthz(createDefaultHTTPClient(), req, exp) |
| 35 | +} |
| 36 | + |
| 37 | +func checkHealthz(cli *http.Client, req *http.Request, exp []byte) error { |
| 38 | + resp, err := cli.Do(req) |
| 39 | + if err != nil { |
| 40 | + return fmt.Errorf("failed to make request to /healthz: %w", err) |
| 41 | + } |
| 42 | + defer func() { |
| 43 | + _ = resp.Body.Close() |
| 44 | + }() |
| 45 | + |
| 46 | + if resp.StatusCode != http.StatusOK { |
| 47 | + return fmt.Errorf("server not ready, response not 200") |
| 48 | + } |
| 49 | + |
| 50 | + b, err := io.ReadAll(resp.Body) |
| 51 | + if err != nil { |
| 52 | + return fmt.Errorf("failed to read healthz response: %w", err) |
| 53 | + } |
| 54 | + |
| 55 | + if !bytes.Equal(b, exp) { |
| 56 | + return fmt.Errorf("unexpected healthz response: %s", string(b)) |
| 57 | + } |
| 58 | + |
| 59 | + return nil |
| 60 | +} |
| 61 | + |
| 62 | +func BlockUntilServerReady(ctx context.Context, addr string, opts ...OpOption) error { |
| 63 | + op := &Op{} |
| 64 | + if err := op.applyOpts(opts); err != nil { |
| 65 | + return err |
| 66 | + } |
| 67 | + |
| 68 | + req, err := http.NewRequestWithContext(ctx, http.MethodGet, fmt.Sprintf("%s/healthz", addr), nil) |
| 69 | + if err != nil { |
| 70 | + return fmt.Errorf("failed to create request: %w", err) |
| 71 | + } |
| 72 | + |
| 73 | + exp, err := json.Marshal(server.DefaultHealthz) |
| 74 | + if err != nil { |
| 75 | + return fmt.Errorf("failed to marshal expected healthz response: %w", err) |
| 76 | + } |
| 77 | + |
| 78 | + httpClient := createDefaultHTTPClient() |
| 79 | + |
| 80 | + ticker := time.NewTicker(time.Second) |
| 81 | + defer ticker.Stop() |
| 82 | + |
| 83 | + for range 30 { |
| 84 | + select { |
| 85 | + case <-ticker.C: |
| 86 | + if err := checkHealthz(httpClient, req, exp); err == nil { |
| 87 | + return nil |
| 88 | + } |
| 89 | + case <-ctx.Done(): |
| 90 | + return fmt.Errorf("context done: %w", ctx.Err()) |
| 91 | + } |
| 92 | + } |
| 93 | + return ErrServerNotReady |
| 94 | +} |
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