change kubernetes.io/ label from name to instance (#973)

* Fix #972 change label from name to instance

* Fix tests

* more references

* fix check

* Fix example config

checks/metadataAndInstanceMismatched.yaml

@@ -1,5 +1,5 @@
-successMessage: Label app.kubernetes.io/name matches metadata.name
-failureMessage: Label app.kubernetes.io/name must match metadata.name
+successMessage: Label app.kubernetes.io/instance matches metadata.name
+failureMessage: Label app.kubernetes.io/instance must match metadata.name
 category: Reliability
 target: Controller
 schema:
@@ -12,7 +12,7 @@ schema:
       properties:
         labels:
           type: object
-          required: ["app.kubernetes.io/name"]
+          required: ["app.kubernetes.io/instance"]
           properties:
-            app.kubernetes.io/name:
+            app.kubernetes.io/instance:
               const: "{{ .metadata.name }}"

docs/changelog.md

@@ -6,6 +6,9 @@ meta:
 
 ---
 
+## Unreleased
+* Change `metadataAndNameMismatched` to `metadataAndInstanceMismatched`
+
 ## 8.1.1
 * Add category for `metadataAndNameMismatched`.
 * Fix category for `priorityClassNotSet`.

docs/checks/reliability.md

@@ -17,7 +17,7 @@ key | default | description
 `priorityClassNotSet` | `warning` | Fails when a priorityClassName is not set for a pod.
 `deploymentMissingReplicas` | `warning` | Fails when there is only one replica for a deployment.
 `missingPodDisruptionBudget` | `warning` | Fails when PDB is missing.
-`metadataAndNameMismatched` | `warning` | Fails when label `app.kubernetes.io/name` and `metadata.name` mismatch
+`metadataAndInstanceMismatched` | `warning` | Fails when label `app.kubernetes.io/instance` and `metadata.name` mismatch
 `topologySpreadConstraint` | `warning` | Fails when there is no topology spread constraint on the pod
 
 ## Background
@@ -70,4 +70,4 @@ spec:
 - [Kubernetes Docs: Configure Liveness and Readiness Probes](https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-probes/)
 - [Utilizing Kubernetes Liveness and Readiness Probes to Automatically Recover From Failure](https://medium.com/spire-labs/utilizing-kubernetes-liveness-and-readiness-probes-to-automatically-recover-from-failure-2fe0314f2b2e)
 - [Kubernetes Liveness and Readiness Probes: How to Avoid Shooting Yourself in the Foot](https://blog.colinbreck.com/kubernetes-liveness-and-readiness-probes-how-to-avoid-shooting-yourself-in-the-foot/)
-- [Topology Spread Constraints](https://kubernetes.io/docs/concepts/scheduling-eviction/topology-spread-constraints/)
+- [Topology Spread Constraints](https://kubernetes.io/docs/concepts/scheduling-eviction/topology-spread-constraints/)

examples/config-full.yaml

@@ -9,7 +9,7 @@ checks:
   topologySpreadConstraint: warning
   pdbDisruptionsIsZero: warning
   missingPodDisruptionBudget: warning
-  metadataAndNameMismatched: warning
+  metadataAndInstanceMismatched: warning
 
   # efficiency
   cpuRequestsMissing: warning

examples/config.yaml

@@ -6,7 +6,7 @@ checks:
   pullPolicyNotAlways: warning
   readinessProbeMissing: warning
   livenessProbeMissing: warning
-  metadataAndNameMismatched: warning
+  metadataAndInstanceMismatched: warning
   pdbDisruptionsIsZero: warning
   missingPodDisruptionBudget: warning
   topologySpreadConstraint: warning

pkg/config/checks.go

@@ -55,7 +55,7 @@ var (
 		// Other checks
 		"tlsSettingsMissing",
 		"pdbDisruptionsIsZero",
-		"metadataAndNameMismatched",
+		"metadataAndInstanceMismatched",
 		"missingPodDisruptionBudget",
 		"missingNetworkPolicy",
 		"sensitiveConfigmapContent",

test/checks/metadataAndInstanceMismatched/failure.yaml

@@ -3,7 +3,7 @@ kind: Pod
 metadata:
   name: nginx
   labels:
-    app.kubernetes.io/name: not-nginx
+    app.kubernetes.io/instance: not-nginx
 spec:
   containers:
   - name: nginx

test/checks/metadataAndInstanceMismatched/success.yaml

@@ -3,7 +3,7 @@ kind: Pod
 metadata:
   name: nginx
   labels:
-    app.kubernetes.io/name: nginx
+    app.kubernetes.io/instance: nginx
 spec:
   containers:
   - name: nginx