OPERATIONAL DEFECT DATABASE
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TKG can specify the configure of cluster in /root/.config/tanzu/tkg/providers/config_default.yaml, then create clusters. This setting is management cluster level, will impact all workload clusters which variables target to in the management cluster. For example, some security hardening settings mentioned in https://docs.vmware.com/en/VMware-Tanzu-Kubernetes-Grid/2.3/using-tkg/workload-security-hardening.html ETCD_EXTRA_ARGS: "auto-tls=false;peer-auto-tls=false;cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384" KUBE_CONTROLLER_MANAGER_EXTRA_ARGS: "tls-min-version=VersionTLS12;profiling=false;tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384" WORKER_KUBELET_EXTRA_ARGS: "streaming-connection-idle-timeout=5m;tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384;protect-kernel-defaults=true" APISERVER_EXTRA_ARGS: "tls-min-version=VersionTLS12;tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384" KUBE_SCHEDULER_EXTRA_ARGS: "tls-min-version=VersionTLS12;tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384" CONTROLPLANE_KUBELET_EXTRA_ARGS: "streaming-connection-idle-timeout=5m;tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384;protect-kernel-defaults=true"
If TKG has a solution via updating the value of variables in /root/.config/tanzu/tkg/providers/config_default.yaml to fix some issue or require. TCA need guide user to complete this solution from TCA perspective and related changes won't be lost after restarting pod.
Currently TCA runs TKG in a pod and doesn't persistently store the manual changes which happen in the pod. If directly update the content of /root/.config/tanzu/tkg/providers/config_default.yaml in the pod. After pod is restarted, the manual configuration will be lost.
Follow TKG solution guide to prepare a TcaTKGConfig CR instance as below (The format of variable configure is <$VARIABLE_KEY>:<$VARIABLE_VALUE>, like variable ETCD_EXTRA_ARGS etc.)Step 1: Note: here ETCD_EXTRA_ARGS: "auto-tls=false;peer-auto-tls=false;cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384" just is example, no actual meaning. apiVersion: telco.vmware.com/v1alpha1 kind: TcaTKGConfig metadata: name: tkg-config namespace: tca-system spec: tanzuProviderConfig: | ETCD_EXTRA_ARGS: "auto-tls=false;peer-auto-tls=false;cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384" KUBE_CONTROLLER_MANAGER_EXTRA_ARGS: "tls-min-version=VersionTLS12;profiling=false;tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384" WORKER_KUBELET_EXTRA_ARGS: "streaming-connection-idle-timeout=5m;tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384;protect-kernel-defaults=true" APISERVER_EXTRA_ARGS: "tls-min-version=VersionTLS12;tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384" KUBE_SCHEDULER_EXTRA_ARGS: "tls-min-version=VersionTLS12;tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384" CONTROLPLANE_KUBELET_EXTRA_ARGS: "streaming-connection-idle-timeout=5m;tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384;protect-kernel-defaults=true" Step2: ssh login the control plane node of management cluster Step3: run kubectl apply command to create the prepared TcaTKGConfig CR mentioned in step1 capv@mc-qxqgw-pf4fh [ ~ ]$ cat tkg_config.yaml apiVersion: telco.vmware.com/v1alpha1 kind: TcaTKGConfig metadata: name: tkg-config namespace: tca-system spec: tanzuProviderConfig: | ETCD_EXTRA_ARGS: "auto-tls=false;peer-auto-tls=false;cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384" KUBE_CONTROLLER_MANAGER_EXTRA_ARGS: "tls-min-version=VersionTLS12;profiling=false;tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384" WORKER_KUBELET_EXTRA_ARGS: "streaming-connection-idle-timeout=5m;tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384;protect-kernel-defaults=true" APISERVER_EXTRA_ARGS: "tls-min-version=VersionTLS12;tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384" KUBE_SCHEDULER_EXTRA_ARGS: "tls-min-version=VersionTLS12;tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384" CONTROLPLANE_KUBELET_EXTRA_ARGS: "streaming-connection-idle-timeout=5m;tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384;protect-kernel-defaults=true" capv@mc-qxqgw-pf4fh [ ~ ]$ kubectl apply -f tkg_config.yaml tcatkgconfig.telco.vmware.com/tkg-config created Step4: Check the status of TcaTKGConfig CR instance. If the value of statue.phase is Provisioned, do next, else debug it. capv@mc-qxqgw-pf4fh [ ~ ]$ kubectl get ttc tkg-config -n tca-system -oyaml apiVersion: telco.vmware.com/v1alpha1 kind: TcaTKGConfig metadata: annotations: kubectl.kubernetes.io/last-applied-configuration: | {"apiVersion":"telco.vmware.com/v1alpha1","kind":"TcaTKGConfig","metadata":{"annotations":{},"name":"tkg-config","namespace":"tca-system"},"spec":{"tanzuProviderConfig":"ETCD_EXTRA_ARGS: \"auto-tls=false;peer-auto-tls=false;cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384\"\nKUBE_CONTROLLER_MANAGER_EXTRA_ARGS: \"tls-min-version=VersionTLS12;profiling=false;tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384\"\nWORKER_KUBELET_EXTRA_ARGS: \"streaming-connection-idle-timeout=5m;tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384;protect-kernel-defaults=true\"\nAPISERVER_EXTRA_ARGS: \"tls-min-version=VersionTLS12;tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384\"\nKUBE_SCHEDULER_EXTRA_ARGS: \"tls-min-version=VersionTLS12;tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384\"\nCONTROLPLANE_KUBELET_EXTRA_ARGS: \"streaming-connection-idle-timeout=5m;tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384;protect-kernel-defaults=true\"\n"}} creationTimestamp: "2023-08-22T12:19:01Z" finalizers: - telco.vmware.com/tcatkgconfig generation: 1 name: tkg-config namespace: tca-system resourceVersion: "5420235" uid: 5d29d115-9b2c-4eed-b180-9265acbc4c2f spec: tanzuProviderConfig: | ETCD_EXTRA_ARGS: "auto-tls=false;peer-auto-tls=false;cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384" KUBE_CONTROLLER_MANAGER_EXTRA_ARGS: "tls-min-version=VersionTLS12;profiling=false;tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384" WORKER_KUBELET_EXTRA_ARGS: "streaming-connection-idle-timeout=5m;tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384;protect-kernel-defaults=true" APISERVER_EXTRA_ARGS: "tls-min-version=VersionTLS12;tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384" KUBE_SCHEDULER_EXTRA_ARGS: "tls-min-version=VersionTLS12;tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384" CONTROLPLANE_KUBELET_EXTRA_ARGS: "streaming-connection-idle-timeout=5m;tls-cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384;protect-kernel-defaults=true" status: conditions: - lastTransitionTime: "2023-08-22T12:19:00Z" status: "True" type: Ready - lastTransitionTime: "2023-08-22T12:19:00Z" status: "True" type: TKGConfigInitReady phase: Provisioned Step5 (Optional): further check related configuration in pod capv@mc-qxqgw-pf4fh [ ~ ]$ kubectl get pod -n tca-system NAME READY STATUS RESTARTS AGE tca-kubecluster-operator-56f877d64f-rq7g2 1/1 Running 0 4h42m capv@mc-qxqgw-pf4fh [ ~ ]$ kubectl exec -n tca-system tca-kubecluster-operator-56f877d64f-rq7g2 -it bash kubectl exec [POD] [COMMAND] is DEPRECATED and will be removed in a future version. Use kubectl exec [POD] -- [COMMAND] instead. root [ / ]# grep ETCD_EXTRA_ARGS /root/.config/tanzu/tkg/providers/config_default.yaml #! ETCD_EXTRA_ARGS specified etcd flags. ETCD_EXTRA_ARGS: auto-tls=false;peer-auto-tls=false;cipher-suites=TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,TLS_RSA_WITH_AES_256_GCM_SHA384 root [ / ]# Step6: Create workload clusters
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