Drop default log-level from error to warn

Our users are missing certain warning messages that would
make debugging issues with Podman easier.

For example if you do a podman build with a Containerfile
that contains the SHELL directive, the Derective is silently
ignored.

If you run with the log-level warn you get a warning message explainging
what happened.

$ podman build --no-cache -f /tmp/Containerfile1 /tmp/
STEP 1: FROM ubi8
STEP 2: SHELL ["/bin/bash", "-c"]
STEP 3: COMMIT
--> 7a207be102a
7a207be102aa8993eceb32802e6ceb9d2603ceed9dee0fee341df63e6300882e

$ podman --log-level=warn build --no-cache -f /tmp/Containerfile1 /tmp/
STEP 1: FROM ubi8
STEP 2: SHELL ["/bin/bash", "-c"]
STEP 3: COMMIT
WARN[0000] SHELL is not supported for OCI image format, [/bin/bash -c] will be ignored. Must use `docker` format
--> 7bd96fd25b9
7bd96fd25b9f755d8a045e31187e406cf889dcf3799357ec906e90767613e95f

These messages will no longer be lost, when we default to WARNing level.

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/pkg/api/handlers/compat/images_build.go b/pkg/api/handlers/compat/images_build.go
index 149050209..43478c1d3 100644
--- a/pkg/api/handlers/compat/images_build.go
+++ b/pkg/api/handlers/compat/images_build.go
@@ -263,7 +263,7 @@ loop:
 			failed = true
 			m.Error = string(e)
 			if err := enc.Encode(m); err != nil {
-				logrus.Warnf("Failed to json encode error %q", err.Error())
+				logrus.Warnf("Failed to json encode error %v", err)
 			}
 			flush()
 		case <-runCtx.Done():
@@ -271,7 +271,7 @@ loop:
 				if !utils.IsLibpodRequest(r) {
 					m.Stream = fmt.Sprintf("Successfully built %12.12s\n", imageID)
 					if err := enc.Encode(m); err != nil {
-						logrus.Warnf("Failed to json encode error %q", err.Error())
+						logrus.Warnf("Failed to json encode error %v", err)
 					}
 					flush()
 				}