From fe53c4684c2c15425cda6d3d46de973d62230fe6 Mon Sep 17 00:00:00 2001
From: Anton Averchenkov <84287187+averche@users.noreply.github.com>
Date: Wed, 31 May 2023 12:04:33 -0400
Subject: [PATCH] agent: Don't render templates to stdout in supervisor mode
 (#20884)

---
 command/agent/exec/exec.go | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/command/agent/exec/exec.go b/command/agent/exec/exec.go
index a1ea97addc..1d924f8c97 100644
--- a/command/agent/exec/exec.go
+++ b/command/agent/exec/exec.go
@@ -122,6 +122,9 @@ func (s *Server) Run(ctx context.Context, incomingVaultToken chan string) error
 		return fmt.Errorf("template server failed to create: %w", err)
 	}
 
+	// prevent the templates from being rendered to stdout in "dry" mode
+	s.runner.SetOutStream(io.Discard)
+
 	s.numberOfTemplates = len(s.runner.TemplateConfigMapping())
 
 	for {
@@ -153,6 +156,10 @@ func (s *Server) Run(ctx context.Context, incomingVaultToken chan string) error
 					s.logger.Error("template server failed with new Vault token", "error", err)
 					continue
 				}
+
+				// prevent the templates from being rendered to stdout in "dry" mode
+				s.runner.SetOutStream(io.Discard)
+
 				go s.runner.Start()
 			}