Adding kubelet logging verbosity

day-two.md

@@ -61,7 +61,12 @@ oc patch imagepruner.imageregistry.operator.openshift.io/cluster --type merge --
 Refer to these instructions to configure chrony time service
 * [Chrony time service]
 
-### 5. Configure multitenant network policy
+### 5. Configure kubelet logging verbosity
+
+Refer to these instructions to configure kubelet logging verbosity
+* [Kubelet logging verbosity]
+
+### 6. Configure multitenant network policy
 
 Using Network Policy, by default, all Pods in a project are accessible from other Pods and network endpoints.  Refer to the documentation for information on [configuring multitenant network policy].  Refer to the documentation for steps to [configure this policy for new projects by default].
 
@@ -71,7 +76,7 @@ oc create -f template/multitenant-project-template.yaml -n openshift-config
 oc patch project.config.openshift.io/cluster --type merge -p '{"spec":{"projectRequestTemplate":{"name":"multitenant-project-template"}}}'
 ```
 
-### 6. [Restricted Network] - Configure support tools
+### 7. [Restricted Network] - Configure support tools
 
 Refer to these instructions to configure support tools for a restricted network
 * [Support tools]
@@ -93,6 +98,7 @@ Kevin Chung
 [3scale operator]: ./operator/3scale/
 [automatically pruning images]: https://docs.openshift.com/container-platform/latest/applications/pruning-objects.html#pruning-images_pruning-objects
 [Chrony time service]: ./machineconfig/chrony/
+[Kubelet logging verbosity]: ./machineconfig/kubelet/
 [configuring multitenant network policy]: https://docs.openshift.com/container-platform/latest/networking/network_policy/multitenant-network-policy.html
 [configure this policy for new projects by default]: https://docs.openshift.com/container-platform/latest/networking/network_policy/default-network-policy.html
 [example project template for multitenant network policy]: ./template/multitenant-project-template.yaml

machineconfig/kubelet/02-kubelet-env-config-infra.yaml

@@ -0,0 +1,25 @@
+apiVersion: machineconfiguration.openshift.io/v1
+kind: MachineConfig
+metadata:
+  labels:
+    machineconfiguration.openshift.io/role: infra
+  name: 02-kubelet-env-config-infra
+spec:
+  config:
+    ignition:
+      config: {}
+      security:
+        tls: {}
+      timeouts: {}
+      version: 2.2.0
+    networkd: {}
+    passwd: {}
+    storage:
+      files:
+      - contents:
+          source: data:text/plain;charset=utf-8;base64,S1VCRUxFVF9MT0dfTEVWRUw9MQo=
+          verification: {}
+        filesystem: root
+        mode: 420
+        path: /etc/kubernetes/kubelet-env
+  osImageURL: ""

machineconfig/kubelet/02-kubelet-env-config-master.yaml

@@ -0,0 +1,25 @@
+apiVersion: machineconfiguration.openshift.io/v1
+kind: MachineConfig
+metadata:
+  labels:
+    machineconfiguration.openshift.io/role: master
+  name: 02-kubelet-env-config-master
+spec:
+  config:
+    ignition:
+      config: {}
+      security:
+        tls: {}
+      timeouts: {}
+      version: 2.2.0
+    networkd: {}
+    passwd: {}
+    storage:
+      files:
+      - contents:
+          source: data:text/plain;charset=utf-8;base64,S1VCRUxFVF9MT0dfTEVWRUw9MQo=
+          verification: {}
+        filesystem: root
+        mode: 420
+        path: /etc/kubernetes/kubelet-env
+  osImageURL: ""

machineconfig/kubelet/02-kubelet-env-config-worker.yaml

@@ -0,0 +1,25 @@
+apiVersion: machineconfiguration.openshift.io/v1
+kind: MachineConfig
+metadata:
+  labels:
+    machineconfiguration.openshift.io/role: worker
+  name: 02-kubelet-env-config-worker
+spec:
+  config:
+    ignition:
+      config: {}
+      security:
+        tls: {}
+      timeouts: {}
+      version: 2.2.0
+    networkd: {}
+    passwd: {}
+    storage:
+      files:
+      - contents:
+          source: data:text/plain;charset=utf-8;base64,S1VCRUxFVF9MT0dfTEVWRUw9MQo=
+          verification: {}
+        filesystem: root
+        mode: 420
+        path: /etc/kubernetes/kubelet-env
+  osImageURL: ""

machineconfig/kubelet/README.md

@@ -0,0 +1,16 @@
+# Configure Kubelet Logging Verbosity
+
+Refer to this Knowledgebase article for [configuring kubelet logging verbosity].
+
+### Step by step example
+
+In this example, I have followed the article to create MachineConfigs to apply the logging level to `/etc/kubernetes/kubelet-env` which will persist across reboots.
+
+Then, I applied the MachineConfigs to the cluster with:
+```
+oc apply -f 02-kubelet-env-config-master.yaml
+oc apply -f 02-kubelet-env-config-worker.yaml
+oc apply -f 02-kubelet-env-config-infra.yaml   # for clusters with infra tier
+```
+
+[configuring kubelet logging verbosity]: https://access.redhat.com/solutions/4619431