ihcsim

# Port-Forward To RKE2 Prometheus In Harvester

Retrieve the `web.external-url` from the Prometheus pod:

```sh
k -n cattle-monitoring-system get po prometheus-rancher-monitoring-prometheus-0 -ojsonpath='{.spec.containers[?(@.name=="prometheus")].args}' | grep "web.ext
ernal-url"
```

ihcsim

How To Retrieve SSH Key To Harvester Guest Cluster From Rancher UI

• Navigate to Cluster Management page on Rancher
• Find the Machine Pool section of the cluster
• Right-click to access the Download SSH Key option

ihcsim

Changing RKE2 etcd storage size:

echo 'etcd-arg: "quota-backend-bytes=4294967296"' > /etc/rancher/rke2/config.yaml.d/etcd.yaml

ihcsim

Reset RKE2 on Harvester

The rke2 server --cluster-reset command can be used to reset etcd to a single-node cluster, with its data intact.

See https://docs.rke2.io/datastore/backup_restore

Stop the RKE2 server:

sudo systemctl stop rke2-server

ihcsim

---
apiVersion: apiextensions.k8s.io/v1
kind: CustomResourceDefinition
metadata:
  annotations:
  name: vnodes.virt.dev
spec:
  group: virt.dev
  names:
    kind: VNode

ihcsim

package cel

const (
	// PerCallLimit specify the actual cost limit per CEL validation call
	// current PerCallLimit gives roughly 0.1 second for each expression validation call
	PerCallLimit = 1000000

	// RuntimeCELCostBudget is the overall cost budget for runtime CEL validation cost per ValidatingAdmissionPolicyBinding or CustomResource
	// current RuntimeCELCostBudget gives roughly 1 seconds for the validation
	RuntimeCELCostBudget = 10000000

ihcsim

// Evaluate runs a compiled CEL admission plugin expression using the provided activation and CEL
// runtime cost budget.
func (a *evaluationActivation) Evaluate(ctx context.Context, compositionCtx CompositionContext, compilationResult CompilationResult, remainingBudget int64) (EvaluationResult, int64, error) {
    	// ...
    	t1 := time.Now()
	evalResult, evalDetails, err := compilationResult.Program.ContextEval(ctx, a)
	// budget may be spent due to lazy evaluation of composited variables
	if compositionCtx != nil {
		compositionCost := compositionCtx.GetAndResetCost()
		if compositionCost > remainingBudget {

ihcsim

// ForInput evaluates the compiled CEL expressions converting them into CELEvaluations
// errors per evaluation are returned on the Evaluation object
// runtimeCELCostBudget was added for testing purpose only. Callers should always use const RuntimeCELCostBudget from k8s.io/apiserver/pkg/apis/cel/config.go as input.
func (c *condition) ForInput(ctx context.Context, versionedAttr *admission.VersionedAttributes, request *admissionv1.AdmissionRequest, inputs OptionalVariableBindings, namespace *v1.Namespace, runtimeCELCostBudget int64) ([]EvaluationResult, int64, error) {
    // ...
    	remainingBudget := runtimeCELCostBudget
	for i, compilationResult := range c.compilationResults {
		evaluations[i], remainingBudget, err = activation.Evaluate(ctx, compositionCtx, compilationResult, remainingBudget)
		if err != nil {
			return nil, -1, err

ihcsim

func (v *validator) Validate(ctx context.Context, matchedResource schema.GroupVersionResource, versionedAttr *admission.VersionedAttributes, versionedParams runtime.Object, namespace *corev1.Namespace, runtimeCELCostBudget int64, authz authorizer.Authorizer) ValidateResult {
    // ...    
    evalResults, remainingBudget, err := v.validationFilter.ForInput(ctx, versionedAttr, admissionRequest, optionalVars, ns, runtimeCELCostBudget)
    if err != nil {
        return ValidateResult{
            Decisions: []PolicyDecision{
                {
                    Action:     policyDecisionActionForError(f),
                    Evaluation: EvalError,
                    Message:    err.Error(),

ihcsim

// Dispatch implements generic.Dispatcher.
func (c *dispatcher) Dispatch(ctx context.Context, a admission.Attributes, o admission.ObjectInterfaces, hooks []PolicyHook) error {
    // ...
    validationResults = append(validationResults,
        hook.Evaluator.Validate(
            ctx,
            matchResource,
            versionedAttr,
            p,
            namespace,