osbase/logtree.LeveledLogger -> go/logging.Leveled

This factors out the common leveled logger interface out of the logtree.
We want to use the same interface outside of logtree/supervisor usage
within the resolver code, which will be exposed to clients.

Change-Id: I299e76d91e8cefddf8f36f1e58432418c4694df2
Reviewed-on: https://review.monogon.dev/c/monogon/+/3411
Reviewed-by: Tim Windelschmidt <tim@monogon.tech>
Tested-by: Jenkins CI
diff --git a/metropolis/node/core/consensus/BUILD.bazel b/metropolis/node/core/consensus/BUILD.bazel
index b68c7f9..ac048d6 100644
--- a/metropolis/node/core/consensus/BUILD.bazel
+++ b/metropolis/node/core/consensus/BUILD.bazel
@@ -12,6 +12,7 @@
     importpath = "source.monogon.dev/metropolis/node/core/consensus",
     visibility = ["//:__subpackages__"],
     deps = [
+        "//go/logging",
         "//metropolis/node",
         "//metropolis/node/core/consensus/client",
         "//metropolis/node/core/identity",
@@ -44,6 +45,7 @@
         "block-network",
     ],
     deps = [
+        "//go/logging",
         "//metropolis/node/core/localstorage",
         "//metropolis/node/core/localstorage/declarative",
         "//metropolis/test/util",
diff --git a/metropolis/node/core/consensus/logparser.go b/metropolis/node/core/consensus/logparser.go
index b403423..f825431 100644
--- a/metropolis/node/core/consensus/logparser.go
+++ b/metropolis/node/core/consensus/logparser.go
@@ -8,6 +8,7 @@
 	"strings"
 	"time"
 
+	"source.monogon.dev/go/logging"
 	"source.monogon.dev/osbase/logbuffer"
 	"source.monogon.dev/osbase/logtree"
 	"source.monogon.dev/osbase/logtree/unraw"
@@ -80,13 +81,13 @@
 	// Convert zap level into logtree severity.
 	switch e.Level {
 	case "info":
-		out.Severity = logtree.INFO
+		out.Severity = logging.INFO
 	case "warn":
-		out.Severity = logtree.WARNING
+		out.Severity = logging.WARNING
 	case "error":
-		out.Severity = logtree.ERROR
+		out.Severity = logging.ERROR
 	case "fatal", "panic", "dpanic":
-		out.Severity = logtree.FATAL
+		out.Severity = logging.FATAL
 	}
 
 	// Sort extra keys alphabetically.
diff --git a/metropolis/node/core/consensus/logparser_test.go b/metropolis/node/core/consensus/logparser_test.go
index cfe6fea..101211c 100644
--- a/metropolis/node/core/consensus/logparser_test.go
+++ b/metropolis/node/core/consensus/logparser_test.go
@@ -6,6 +6,7 @@
 
 	"github.com/google/go-cmp/cmp"
 
+	"source.monogon.dev/go/logging"
 	"source.monogon.dev/osbase/logbuffer"
 	"source.monogon.dev/osbase/logtree"
 )
@@ -35,7 +36,7 @@
 			&logtree.ExternalLeveledPayload{
 				Message:   `configuring peer listeners, listen-peer-urls: ["https://[::]:7834"]`,
 				Timestamp: timeParse("2021-07-06T17:18:24.368Z"),
-				Severity:  logtree.INFO,
+				Severity:  logging.INFO,
 				File:      "etcd.go",
 				Line:      117,
 			},
@@ -46,7 +47,7 @@
 			&logtree.ExternalLeveledPayload{
 				Message:   `added member, added-peer-id: "9642132f5d0d99e2", added-peer-peer-urls: ["https://metropolis-eb8d68cfb52711ad04c339abdeea74ed:7834"], cluster-id: "137c8e19524788c1", local-member-id: "9642132f5d0d99e2"`,
 				Timestamp: timeParse("2021-07-06T17:21:49.462Z"),
-				Severity:  logtree.INFO,
+				Severity:  logging.INFO,
 				File:      "cluster.go",
 				Line:      392,
 			},