tao.chenandClaude
c4ac3cc354
- internal/rm/client.go: YARN RM 客户端 - ListApps / GetApp / KillApp / GetLogs - GetLogs 降级链数据驱动 (amContainerLogs → aggregated-logs → logs) - 跨主机 redirect 保留 Authorization (URLAllowlist 兜底) - 4 Tool: list_applications / get_application_status / get_application_logs / kill_application - mcp.WithEnum(state) 约束 YARN app 状态 - tool handler 永远 (result, nil), 业务错误用 NewToolResultError - deps.go: +HTTPClient + MaxResponseBytes - main.go: 注入 httpclient.Client - 端到端实测: mock RM 验证 4 Tool + 降级链 + 错误路径 Co-Authored-By: Claude <noreply@anthropic.com>
94 lines
2.6 KiB
Go
94 lines
2.6 KiB
Go
package tools
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import (
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"context"
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"github.com/mark3labs/mcp-go/mcp"
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"spark-mcp-go/internal/rm"
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)
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const GetApplicationLogsName = "get_application_logs"
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const defaultTailBytes = 1 << 20
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// NewGetApplicationLogsTool returns the schema for the get_application_logs MCP Tool.
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func NewGetApplicationLogsTool() mcp.Tool {
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return mcp.NewTool(GetApplicationLogsName,
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mcp.WithDescription("Fetch YARN application logs. Tries amContainerLogs first, then aggregated-logs, then the legacy /logs endpoint. Returns {source, text}."),
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mcp.WithString("cluster_id",
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mcp.Required(),
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mcp.Description("ID of the configured cluster (from list_clusters)"),
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),
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mcp.WithString("app_id",
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mcp.Required(),
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mcp.Description("YARN application ID, e.g. application_1234567890_0001"),
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),
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mcp.WithString("container",
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mcp.Description("Container ID used for the aggregated-logs fallback, e.g. container_1234567890_0001_01_000001."),
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),
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mcp.WithNumber("tail_bytes",
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mcp.Description("Maximum bytes to return. 0 means use the server-wide response byte limit."),
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),
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)
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}
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// GetApplicationLogsHandler retrieves logs using the RM fallback chain.
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func (d *Deps) GetApplicationLogsHandler(ctx context.Context, req mcp.CallToolRequest) (*mcp.CallToolResult, error) {
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clusterID, err := req.RequireString("cluster_id")
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if err != nil {
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return errResult("get_application_logs: " + err.Error()), nil
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}
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appID, err := req.RequireString("app_id")
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if err != nil {
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return errResult("get_application_logs: " + err.Error()), nil
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}
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args := req.GetArguments()
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container := ""
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if v, ok := args["container"].(string); ok {
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container = v
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}
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tailBytes := defaultTailBytes
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if v, ok := args["tail_bytes"].(float64); ok {
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tailBytes = int(v)
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}
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if tailBytes == 0 {
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tailBytes = int(d.MaxResponseBytes)
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}
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callLog := startToolCall(ctx, d.Logger, GetApplicationLogsName, map[string]any{
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"cluster_id": clusterID,
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"app_id": appID,
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"container": container,
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"tail_bytes": tailBytes,
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})
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defer callLog.End()
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cl, err := d.ClusterRepo.Get(ctx, clusterID)
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if err != nil {
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callLog.WithError(err)
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return errResult("get_application_logs: cluster " + clusterID + ": " + err.Error()), nil
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}
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rmc := rm.New(d.HTTPClient, cl)
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body, source, err := rmc.GetLogs(ctx, appID, container)
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if err != nil {
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callLog.WithError(err)
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return errResult("get_application_logs: " + err.Error()), nil
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}
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text := string(body)
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if len(text) > tailBytes {
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text = truncateMiddle(text, tailBytes)
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}
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result := map[string]any{
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"source": source,
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"text": text,
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}
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callLog.WithResult(map[string]any{"source": source, "bytes": len(body), "returned_bytes": len(text)})
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return textResult(encodeJSON(result)), nil
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}
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