No longer enforce version matching between daemon and cli (#4271)

* No longer check version matching between daemon and cli

* Add Log Service Handler and report if the daemon is running in background mode

internal/clientcache/internal/daemon/log_handler.go

@@ -0,0 +1,50 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: BUSL-1.1
+
+package daemon
+
+import (
+	"context"
+	"encoding/json"
+	"io"
+	"net/http"
+
+	"github.com/hashicorp/boundary/internal/event"
+)
+
+// LogRequest is the request body to this handler.
+type LogRequest struct {
+	// Message is a required field for all requests
+	Message string `json:"message,omitempty"`
+	Op      string `json:"op,omitempty"`
+}
+
+// newLogHandlerFunc creates a handler that logs a system event using the
+// daemon's eventer.
+func newLogHandlerFunc(ctx context.Context) (http.HandlerFunc, error) {
+	const op = "daemon.newLogHandlerFunc"
+
+	return func(w http.ResponseWriter, r *http.Request) {
+		if r.Method != http.MethodPost {
+			writeError(w, "only method POST allowed", http.StatusMethodNotAllowed)
+		}
+
+		var perReq LogRequest
+		data, err := io.ReadAll(r.Body)
+		if err != nil {
+			writeError(w, "unable to read request body", http.StatusBadRequest)
+			return
+		}
+		if err := json.Unmarshal(data, &perReq); err != nil {
+			// If, for whatever reason, we can't parse the request body as json
+			// can still log that the request to log was received and print out
+			// the body of the request.
+			event.WriteError(ctx, op, err, event.WithInfo("body", string(data)))
+			writeError(w, "unable to parse request body", http.StatusBadRequest)
+			return
+		}
+
+		event.WriteSysEvent(ctx, op, perReq.Message, "requester_op", perReq.Op)
+		w.WriteHeader(http.StatusNoContent)
+	}, nil
+}