add method to compare if error has tmp file path

add a method to check if the error message contains a tmp file path. It
is to prevent updating resource's condition forever and causing the
controller flapping. https://github.com/rancher/rancher/issues/15103

condition/condition.go

@@ -2,6 +2,7 @@ package condition
 
 import (
 	"reflect"
+	"regexp"
 	"time"
 
 	"github.com/pkg/errors"
@@ -12,6 +13,8 @@ import (
 
 type Cond string
 
+var temfileRegexp = regexp.MustCompile("/tmp/[-_a-zA-Z0-9]+")
+
 func (c Cond) True(obj runtime.Object) {
 	setStatus(obj, string(c), "True")
 }
@@ -133,9 +136,14 @@ func (c Cond) do(obj runtime.Object, f func() (runtime.Object, error)) (runtime.
 
 	// This is to prevent non stop flapping of states and update
 	if status == c.GetStatus(obj) &&
-		reason == c.GetReason(obj) &&
-		message == c.GetMessage(obj) {
-		c.LastUpdated(obj, ts)
+		reason == c.GetReason(obj) {
+		if message != c.GetMessage(obj) {
+			replaced := temfileRegexp.ReplaceAllString(c.GetMessage(obj), "file_path_redacted")
+			c.Message(obj, replaced)
+		}
+		if message == c.GetMessage(obj) {
+			c.LastUpdated(obj, ts)
+		}
 	}
 
 	return obj, err

condition/condition_test.go

@@ -0,0 +1,19 @@
+package condition
+
+import "testing"
+
+func TestRegexp(t *testing.T) {
+	testInputs := []string{
+		"create file /tmp/file-uy76324 ",
+		"/tmp/file-y6123tsd",
+	}
+	testOutputs := []string{
+		"create file file_path_redacted ",
+		"file_path_redacted",
+	}
+	for i, s := range testInputs {
+		if testOutputs[i] != temfileRegexp.ReplaceAllString(s, "file_path_redacted") {
+			t.Fatalf("Regexp failed to check %s", testInputs[i])
+		}
+	}
+}