Change "failed to stop sandbox" error message to use state name instead of numeric value

Signed-off-by: Brian Pursley <bpursley@cinlogic.com>

pkg/store/sandbox/status.go

@@ -17,8 +17,11 @@
 package sandbox
 
 import (
+	"strconv"
 	"sync"
 	"time"
+
+	runtime "k8s.io/cri-api/pkg/apis/runtime/v1alpha2"
 )
 
 // The sandbox state machine in the CRI plugin:
@@ -63,7 +66,7 @@ type State uint32
 const (
 	// StateReady is ready state, it means sandbox container
 	// is running.
-	StateReady = iota
+	StateReady State = iota
 	// StateNotReady is notready state, it ONLY means sandbox
 	// container is not running.
 	// StopPodSandbox should still be called for NOTREADY sandbox to
@@ -75,6 +78,21 @@ const (
 	StateUnknown
 )
 
+// String returns the string representation of the state
+func (s State) String() string {
+	switch s {
+	case StateReady:
+		return runtime.PodSandboxState_SANDBOX_READY.String()
+	case StateNotReady:
+		return runtime.PodSandboxState_SANDBOX_NOTREADY.String()
+	case StateUnknown:
+		// PodSandboxState doesn't have an unknown state, but State does, so return a string using the same convention
+		return "SANDBOX_UNKNOWN"
+	default:
+		return "invalid sandbox state value: " + strconv.Itoa(int(s))
+	}
+}
+
 // Status is the status of a sandbox.
 type Status struct {
 	// Pid is the init process id of the sandbox container.

pkg/store/sandbox/status_test.go

@@ -18,6 +18,7 @@ package sandbox
 
 import (
 	"errors"
+	"fmt"
 	"testing"
 	"time"
 
@@ -59,3 +60,11 @@ func TestStatus(t *testing.T) {
 	assert.NoError(err)
 	assert.Equal(updateStatus, s.Get())
 }
+
+func TestStateStringConversion(t *testing.T) {
+	assert := assertlib.New(t)
+	assert.Equal("SANDBOX_READY", fmt.Sprintf("%s", StateReady))
+	assert.Equal("SANDBOX_NOTREADY", fmt.Sprintf("%s", StateNotReady))
+	assert.Equal("SANDBOX_UNKNOWN", fmt.Sprintf("%s", StateUnknown))
+	assert.Equal("invalid sandbox state value: 123", fmt.Sprintf("%s", State(123)))
+}