fix: correct AMI ordering function (#6164)

aws · May 15, 2024 · 2875a9b · 2875a9b
1 parent 77dc39c
commit 2875a9b
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Showing 2 changed files with 60 additions and 7 deletions.
diff --git a/pkg/providers/amifamily/ami.go b/pkg/providers/amifamily/ami.go
@@ -60,20 +60,15 @@ type AMI struct {
 type AMIs []AMI
 
 // Sort orders the AMIs by creation date in descending order.
-// If creation date is nil or two AMIs have the same creation date, the AMIs will be sorted by name in ascending order.
+// If creation date is nil or two AMIs have the same creation date, the AMIs will be sorted by ID, which is guaranteed to be unique, in ascending order.
 func (a AMIs) Sort() {
 	sort.Slice(a, func(i, j int) bool {
 		itime, _ := time.Parse(time.RFC3339, a[i].CreationDate)
 		jtime, _ := time.Parse(time.RFC3339, a[j].CreationDate)
 		if itime.Unix() != jtime.Unix() {
 			return itime.Unix() > jtime.Unix()
 		}
-		if a[i].Name != a[j].Name {
-			return a[i].Name < a[j].Name
-		}
-		iHash, _ := hashstructure.Hash(a[i].Requirements, hashstructure.FormatV2, &hashstructure.HashOptions{})
-		jHash, _ := hashstructure.Hash(a[i].Requirements, hashstructure.FormatV2, &hashstructure.HashOptions{})
-		return iHash < jHash
+		return a[i].AmiID < a[j].AmiID
 	})
 }
 

diff --git a/pkg/providers/amifamily/suite_test.go b/pkg/providers/amifamily/suite_test.go
@@ -440,6 +440,64 @@ var _ = Describe("AMIProvider", func() {
 				},
 			))
 		})
+		It("should sort amis with the same name and creation date consistently", func() {
+			amis := amifamily.AMIs{
+				{
+					Name:         "test-ami-1",
+					AmiID:        "test-ami-4-id",
+					CreationDate: "2021-08-31T00:10:42.000Z",
+					Requirements: scheduling.NewRequirements(),
+				},
+				{
+					Name:         "test-ami-1",
+					AmiID:        "test-ami-3-id",
+					CreationDate: "2021-08-31T00:10:42.000Z",
+					Requirements: scheduling.NewRequirements(),
+				},
+				{
+					Name:         "test-ami-1",
+					AmiID:        "test-ami-2-id",
+					CreationDate: "2021-08-31T00:10:42.000Z",
+					Requirements: scheduling.NewRequirements(),
+				},
+				{
+					Name:         "test-ami-1",
+					AmiID:        "test-ami-1-id",
+					CreationDate: "2021-08-31T00:10:42.000Z",
+					Requirements: scheduling.NewRequirements(),
+				},
+			}
+
+			amis.Sort()
+			Expect(amis).To(Equal(
+				amifamily.AMIs{
+					{
+						Name:         "test-ami-1",
+						AmiID:        "test-ami-1-id",
+						CreationDate: "2021-08-31T00:10:42.000Z",
+						Requirements: scheduling.NewRequirements(),
+					},
+					{
+						Name:         "test-ami-1",
+						AmiID:        "test-ami-2-id",
+						CreationDate: "2021-08-31T00:10:42.000Z",
+						Requirements: scheduling.NewRequirements(),
+					},
+					{
+						Name:         "test-ami-1",
+						AmiID:        "test-ami-3-id",
+						CreationDate: "2021-08-31T00:10:42.000Z",
+						Requirements: scheduling.NewRequirements(),
+					},
+					{
+						Name:         "test-ami-1",
+						AmiID:        "test-ami-4-id",
+						CreationDate: "2021-08-31T00:10:42.000Z",
+						Requirements: scheduling.NewRequirements(),
+					},
+				},
+			))
+		})
 	})
 })