// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package ssa

// critical splits critical edges (those that go from a block with
// more than one outedge to a block with more than one inedge).
// Regalloc wants a critical-edge-free CFG so it can implement phi values.
func critical(f *Func) {
	// maps from phi arg ID to the new block created for that argument

			expected:  true,
		},
		{
			name:      "a not critical pod with higher priority preempts a critical pod",
			preemptor: getTestPod(configSourceAnnotation(ApiserverSource), &systemPriorityUpper, ""),
			preemptee: getTestPod(configSourceAnnotation(FileSource), &systemPriority, ""),
			expected:  true,
		},
		{
			name:      "a critical pod with less priority do not preempts a critical pod",

            extensions =
              listOf(
                Extension(
                  id = keyUsage,
                  critical = true,
                  value = "03020106".decodeHex(),
                ),
                Extension(
                  id = BASIC_CONSTRAINTS,
                  critical = true,
                  value =
                    BasicConstraints(
                      ca = true,

	@echo "x509_extensions = req_ext" >> $@
	@echo "distinguished_name = req_dn" >> $@
	@echo "[ req_ext ]" >> $@
	@echo "subjectKeyIdentifier = hash" >> $@
	@echo "basicConstraints = critical, CA:true" >> $@
	@echo "keyUsage = critical, digitalSignature, nonRepudiation, keyEncipherment, keyCertSign" >> $@
	@echo "[ req_dn ]" >> $@
	@echo "O = $(ROOTCA_ORG)" >> $@
	@echo "CN = $(ROOTCA_CN)" >> $@

%/intermediate.conf: L=$(dir $@)

			expectedDidOverrideInhibitDelay:  false,
			expectedPodToGracePeriodOverride: map[string]int64{"normal-pod-nil-grace-period": 20, "critical-pod-nil-grace-period": 10, "normal-pod-grace-period": 2, "critical-pod-grace-period": 2},
		},
		{
			desc:                             "no override (total=30s, critical=10s) pod with long terminationGracePeriod is overridden",

	SystemPriorityClassPrefix = "system-"
	// SystemClusterCritical is the system priority class name that represents cluster-critical.
	SystemClusterCritical = SystemPriorityClassPrefix + "cluster-critical"
	// SystemNodeCritical is the system priority class name that represents node-critical.
	SystemNodeCritical = SystemPriorityClassPrefix + "node-critical"
)

// +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object

```

Installation in `kube-system` is recommended to ensure the [`system-node-critical`](https://kubernetes.io/docs/tasks/administer-cluster/guaranteed-scheduling-critical-addon-pods/)
`priorityClassName` can be used. You can install in other namespace only on K8S clusters that allow
'system-node-critical' outside of kube-system.

## Configuration

To view support configuration options and documentation, run:

  repeat_interval: 1h
  receiver: 'web.hook'
receivers:
  - name: 'web.hook'
    webhook_configs:
      - url: 'http://127.0.0.1:8010/webhook'
inhibit_rules:
  - source_match:
      severity: 'critical'
    target_match:
      severity: 'warning'
    equal: ['alertname', 'dev', 'instance']
```

This sample configuration uses a `webhook` at http://127.0.0.1:8010/webhook to post the alerts.

	kubetypes "k8s.io/kubernetes/pkg/kubelet/types"
)

const message = "Preempted in order to admit critical pod"

// CriticalPodAdmissionHandler is an AdmissionFailureHandler that handles admission failure for Critical Pods.
// If the ONLY admission failures are due to insufficient resources, then CriticalPodAdmissionHandler evicts pods
// so that the critical pod can be admitted.  For evictions, the CriticalPodAdmissionHandler evicts a set of pods that

// to a Run method), even in the presence of process termination. It guarantees exactly once
// invocation of the provided notify functions.
type Handler struct {
	notify []func()
	final  func(os.Signal)
	once   sync.Once
}

// New creates a new handler that guarantees all notify functions are run after the critical