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hook.go
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hook.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 cluster_configuration
import (
"fmt"
"github.com/flant/addon-operator/pkg/module_manager/go_hook"
"github.com/flant/addon-operator/sdk"
"github.com/flant/shell-operator/pkg/kube_events_manager/types"
v1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"k8s.io/apimachinery/pkg/util/json"
"github.com/deckhouse/deckhouse/dhctl/pkg/config"
)
type Handler func(input *go_hook.HookInput, metaCfg *config.MetaConfig, providerDiscoveryData *unstructured.Unstructured, secretFound bool) error
func RegisterHook(handler Handler) bool {
return sdk.RegisterFunc(&go_hook.HookConfig{
OnBeforeHelm: &go_hook.OrderedConfig{Order: 20},
Kubernetes: []go_hook.KubernetesConfig{
{
Name: "provider_cluster_configuration",
ApiVersion: "v1",
Kind: "Secret",
NamespaceSelector: &types.NamespaceSelector{
NameSelector: &types.NameSelector{
MatchNames: []string{"kube-system"},
},
},
NameSelector: &types.NameSelector{
MatchNames: []string{"d8-provider-cluster-configuration"},
},
FilterFunc: applyProviderClusterConfigurationSecretFilter,
},
},
}, func(input *go_hook.HookInput) error {
return clusterConfiguration(input, handler)
})
}
func applyProviderClusterConfigurationSecretFilter(obj *unstructured.Unstructured) (go_hook.FilterResult, error) {
var secret = &v1.Secret{}
err := sdk.FromUnstructured(obj, secret)
if err != nil {
return nil, fmt.Errorf("cannot convert secret from unstructured: %v", err)
}
return secret, nil
}
func clusterConfiguration(input *go_hook.HookInput, handler Handler) error {
var (
metaCfg *config.MetaConfig
providerDiscoveryData *unstructured.Unstructured
secretFound bool
)
snap := input.Snapshots["provider_cluster_configuration"]
if len(snap) > 0 {
secretFound = true
secret := snap[0].(*v1.Secret)
if clusterConfigurationYAML, ok := secret.Data["cloud-provider-cluster-configuration.yaml"]; ok && len(clusterConfigurationYAML) > 0 {
m, err := config.ParseConfigFromData(string(clusterConfigurationYAML))
if err != nil {
return fmt.Errorf("validate cloud-provider-cluster-configuration.yaml: %v", err)
}
metaCfg = m
}
if discoveryDataJSON, ok := secret.Data["cloud-provider-discovery-data.json"]; ok && len(discoveryDataJSON) > 0 {
err := json.Unmarshal(discoveryDataJSON, &providerDiscoveryData)
if err != nil {
return fmt.Errorf("cannot unmarshal cloud-provider-discovery-data.json key: %v", err)
}
_, err = config.ValidateDiscoveryData(&discoveryDataJSON)
if err != nil {
return fmt.Errorf("validate cloud-provider-discovery-data.json: %v", err)
}
}
}
return handler(input, metaCfg, providerDiscoveryData, secretFound)
}