/
cluster_is_bootstrapped.go
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/
cluster_is_bootstrapped.go
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// Copyright 2021 Flant JSC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package hooks
import (
"github.com/flant/addon-operator/pkg/module_manager/go_hook"
"github.com/flant/addon-operator/sdk"
"github.com/flant/shell-operator/pkg/kube/object_patch"
"github.com/flant/shell-operator/pkg/kube_events_manager/types"
v1core "k8s.io/api/core/v1"
v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
)
const (
isBootstrappedCmSnapName = "is_bootstraped_cm"
readyNotMasterNodesSnapName = "ready_not_master_nodes"
)
const clusterBootstrapFlagPath = "global.clusterIsBootstrapped"
// bootstraped contains typo
// for fix it need do migration
// keep it, but move into const for fix in future
const clusterBootstrappedConfigMap = "d8-cluster-is-bootstraped"
var _ = sdk.RegisterFunc(&go_hook.HookConfig{
Kubernetes: []go_hook.KubernetesConfig{
{
Name: isBootstrappedCmSnapName,
ApiVersion: "v1",
Kind: "ConfigMap",
NameSelector: &types.NameSelector{
MatchNames: []string{clusterBootstrappedConfigMap},
},
NamespaceSelector: &types.NamespaceSelector{
NameSelector: &types.NameSelector{
MatchNames: []string{"kube-system"},
},
},
FilterFunc: applyClusterBootstrapCmFilter,
},
{
Name: readyNotMasterNodesSnapName,
ApiVersion: "v1",
Kind: "Node",
FilterFunc: applyReadyNotMasterNodeFilter,
},
},
}, clusterIsBootstrapped)
func applyClusterBootstrapCmFilter(_ *unstructured.Unstructured) (go_hook.FilterResult, error) {
// we only need to check the configmap existence
return true, nil
}
func applyReadyNotMasterNodeFilter(obj *unstructured.Unstructured) (go_hook.FilterResult, error) {
var node v1core.Node
err := sdk.FromUnstructured(obj, &node)
if err != nil {
return false, err
}
for _, taint := range node.Spec.Taints {
if taint.Key == "node-role.kubernetes.io/control-plane" || taint.Key == "node-role.kubernetes.io/master" {
// it is master node
return false, nil
}
}
// not master - check node is ready
for _, c := range node.Status.Conditions {
if c.Type != v1core.NodeReady {
continue
}
isReady := c.Status == v1core.ConditionTrue
return isReady, nil
}
return false, nil
}
func createBootstrapClusterCm(patchCollector *object_patch.PatchCollector) {
cm := &v1core.ConfigMap{
TypeMeta: v1.TypeMeta{
APIVersion: "v1",
Kind: "ConfigMap",
},
ObjectMeta: v1.ObjectMeta{
Name: clusterBootstrappedConfigMap,
Namespace: "kube-system",
},
}
patchCollector.Create(cm, object_patch.IgnoreIfExists())
}
func clusterIsBootstrapped(input *go_hook.HookInput) error {
isBootstrappedCmSnap := input.Snapshots[isBootstrappedCmSnapName]
readyNodesSnap := input.Snapshots[readyNotMasterNodesSnapName]
if len(isBootstrappedCmSnap) > 0 {
// if we have cm here then set value and return
// configmap is source of truth
input.Values.Set(clusterBootstrapFlagPath, true)
return nil
}
// not have `is bootstrap` configmap
if input.Values.Exists(clusterBootstrapFlagPath) {
// here cm was deleted probably
// create it!
createBootstrapClusterCm(input.PatchCollector)
return nil
}
for _, readyRaw := range readyNodesSnap {
if readyRaw.(bool) {
createBootstrapClusterCm(input.PatchCollector)
input.Values.Set(clusterBootstrapFlagPath, true)
break
}
}
return nil
}