log: support --log-opt tag=

support a custom tag to add to each log for the container.

It is currently supported only by the journald backend.

Closes: https://github.com/containers/libpod/issues/3653

Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/libpod/options.go b/libpod/options.go
index 031f4f705..1d6863e7b 100644
--- a/libpod/options.go
+++ b/libpod/options.go
@@ -1059,6 +1059,23 @@ func WithLogPath(path string) CtrCreateOption {
 	}
 }
 
+// WithLogTag sets the tag to the log file.
+func WithLogTag(tag string) CtrCreateOption {
+	return func(ctr *Container) error {
+		if ctr.valid {
+			return define.ErrCtrFinalized
+		}
+		if tag == "" {
+			return errors.Wrapf(define.ErrInvalidArg, "log tag must be set")
+		}
+
+		ctr.config.LogTag = tag
+
+		return nil
+	}
+
+}
+
 // WithNoCgroups disables the creation of CGroups for the new container.
 func WithNoCgroups() CtrCreateOption {
 	return func(ctr *Container) error {