Helm Chart - allow setting revisionHistoryLimit

charts/linkerd-control-plane/README.md

@@ -298,6 +298,7 @@ Kubernetes: `>=1.22.0-0`
 | proxyInjector.namespaceSelector | object | `{"matchExpressions":[{"key":"config.linkerd.io/admission-webhooks","operator":"NotIn","values":["disabled"]},{"key":"kubernetes.io/metadata.name","operator":"NotIn","values":["kube-system","cert-manager"]}]}` | Namespace selector used by admission webhook. |
 | proxyInjector.objectSelector | object | `{"matchExpressions":[{"key":"linkerd.io/control-plane-component","operator":"DoesNotExist"},{"key":"linkerd.io/cni-resource","operator":"DoesNotExist"}]}` | Object selector used by admission webhook. |
 | proxyInjector.timeoutSeconds | int | `10` | Timeout in seconds before the API Server cancels a request to the proxy injector. If timeout is exceeded, the webhookfailurePolicy is used. |
+| revisionHistoryLimit | int | `10` | Specifies the number of old ReplicaSets to retain to allow rollback. |
 | runtimeClassName | string | `""` | Runtime Class Name for all the pods |
 | webhookFailurePolicy | string | `"Ignore"` | Failure policy for the proxy injector |
 

charts/linkerd-control-plane/templates/destination.yaml

@@ -141,6 +141,7 @@ metadata:
   namespace: {{ .Release.Namespace }}
 spec:
   replicas: {{.Values.controllerReplicas}}
+  revisionHistoryLimit: {{.Values.revisionHistoryLimit}}
   selector:
     matchLabels:
       linkerd.io/control-plane-component: destination

charts/linkerd-control-plane/templates/identity.yaml

@@ -116,6 +116,7 @@ metadata:
   namespace: {{ .Release.Namespace }}
 spec:
   replicas: {{.Values.controllerReplicas}}
+  revisionHistoryLimit: {{.Values.revisionHistoryLimit}}
   selector:
     matchLabels:
       linkerd.io/control-plane-component: identity

charts/linkerd-control-plane/templates/proxy-injector.yaml

@@ -22,6 +22,7 @@ metadata:
   namespace: {{ .Release.Namespace }}
 spec:
   replicas: {{.Values.controllerReplicas}}
+  revisionHistoryLimit: {{.Values.revisionHistoryLimit}}
   selector:
     matchLabels:
       linkerd.io/control-plane-component: proxy-injector

charts/linkerd-control-plane/values.yaml

@@ -13,6 +13,8 @@ clusterDomain: cluster.local
 clusterNetworks: "10.0.0.0/8,100.64.0.0/10,172.16.0.0/12,192.168.0.0/16,fd00::/8"
 # -- Docker image pull policy
 imagePullPolicy: IfNotPresent
+# -- Specifies the number of old ReplicaSets to retain to allow rollback.
+revisionHistoryLimit: 10
 # -- Log level for the control plane components
 controllerLogLevel: info
 # -- Log format for the control plane components

charts/linkerd2-cni/README.md

@@ -62,6 +62,7 @@ Kubernetes: `>=1.22.0-0`
 | resources.ephemeral-storage.request | string | `""` | Amount of ephemeral storage that the cni container requests |
 | resources.memory.limit | string | `""` | Maximum amount of memory that the cni container can use |
 | resources.memory.request | string | `""` | Amount of memory that the cni container requests |
+| revisionHistoryLimit | int | `10` | Specifies the number of old ReplicaSets to retain to allow rollback. |
 | tolerations[0] | object | `{"operator":"Exists"}` | toleration properties |
 | useWaitFlag | bool | `false` | Configures the CNI plugin to use the -w flag for the iptables command |
 

charts/linkerd2-cni/templates/cni-plugin.yaml

@@ -195,6 +195,7 @@ metadata:
   annotations:
     {{ include "partials.annotations.created-by" . }}
 spec:
+  revisionHistoryLimit: {{.Values.revisionHistoryLimit}}
   selector:
     matchLabels:
       k8s-app: linkerd-cni

charts/linkerd2-cni/values.yaml

@@ -32,6 +32,8 @@ iptablesMode: "legacy"
 disableIPv6: false
 # -- Kubernetes priorityClassName for the CNI plugin's Pods
 priorityClassName: ""
+# -- Specifies the number of old ReplicaSets to retain to allow rollback.
+revisionHistoryLimit: 10
 
 # -- Add a PSP resource and bind it to the linkerd-cni ServiceAccounts.
 # Note PSP has been deprecated since k8s v1.21

cli/cmd/install_cni_helm_test.go

@@ -42,7 +42,8 @@ func TestRenderCniHelm(t *testing.T) {
   			"destCNIBinDir": "/opt/cni/bin-test",
   			"useWaitFlag": true,
 			"cliVersion": "test-version",
-			"priorityClassName": "system-node-critical"
+			"priorityClassName": "system-node-critical",
+			"revisionHistoryLimir": 10
 		}`
 
 		var overrideConfig chartutil.Values

cli/cmd/install_test.go

@@ -47,6 +47,7 @@ func TestRender(t *testing.T) {
 		ControllerLogLevel:      "ControllerLogLevel",
 		ControllerLogFormat:     "ControllerLogFormat",
 		ProxyContainerName:      "ProxyContainerName",
+		RevisionHistoryLimit:    10,
 		CNIEnabled:              false,
 		IdentityTrustDomain:     defaultValues.IdentityTrustDomain,
 		IdentityTrustAnchorsPEM: defaultValues.IdentityTrustAnchorsPEM,