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minimal_node_os_version.go
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minimal_node_os_version.go
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// Copyright 2022 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.
// this hook figure out minimal ingress controller version at the beginning and on IngressNginxController creation
// this version is used on requirements check on Deckhouse update
// Deckhouse would not update minor version before pod is ready, so this hook will execute at least once (on sync)
package hooks
import (
"regexp"
"github.com/Masterminds/semver/v3"
"github.com/flant/addon-operator/pkg/module_manager/go_hook"
"github.com/flant/addon-operator/sdk"
v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"k8s.io/utils/pointer"
"github.com/deckhouse/deckhouse/go_lib/dependency/requirements"
)
var osImageUbuntuRegex = regexp.MustCompile(`^Ubuntu ([0-9.]+)( )?(LTS)?$`)
var osImageDebianRegex = regexp.MustCompile(`^Debian GNU\/Linux ([0-9.]+)( )?(.*)?$`)
var _ = sdk.RegisterFunc(&go_hook.HookConfig{
Queue: "/modules/node-manager",
Kubernetes: []go_hook.KubernetesConfig{
{
Name: "nodes_os_version",
WaitForSynchronization: pointer.Bool(false),
ExecuteHookOnSynchronization: pointer.Bool(true),
ExecuteHookOnEvents: pointer.Bool(true),
ApiVersion: "v1",
Kind: "Node",
LabelSelector: &v1.LabelSelector{
MatchExpressions: []v1.LabelSelectorRequirement{
{
Key: "node.deckhouse.io/group",
Operator: v1.LabelSelectorOpExists,
},
},
},
FilterFunc: applyNodesMinimalOSVersionFilter,
},
},
}, discoverMinimalNodesOSVersion)
const (
minVersionUbuntuValuesKey = "nodeManager:nodesMinimalOSVersionUbuntu"
minVersionDebianValuesKey = "nodeManager:nodesMinimalOSVersionDebian"
)
func applyNodesMinimalOSVersionFilter(obj *unstructured.Unstructured) (go_hook.FilterResult, error) {
version, _, err := unstructured.NestedString(obj.Object, "status", "nodeInfo", "osImage")
return version, err
}
func discoverMinimalNodesOSVersion(input *go_hook.HookInput) error {
snap := input.Snapshots["nodes_os_version"]
if len(snap) == 0 {
return nil
}
var minUbuntuVersion, minDebianVersion *semver.Version
for _, s := range snap {
switch {
case osImageUbuntuRegex.MatchString(s.(string)):
ctrlUbuntuVersion, err := semver.NewVersion(osImageUbuntuRegex.FindStringSubmatch(s.(string))[1])
if err != nil {
return err
}
if minUbuntuVersion == nil || ctrlUbuntuVersion.LessThan(minUbuntuVersion) {
minUbuntuVersion = ctrlUbuntuVersion
}
case osImageDebianRegex.MatchString(s.(string)):
ctrlDebianVersion, err := semver.NewVersion(osImageDebianRegex.FindStringSubmatch(s.(string))[1])
if err != nil {
return err
}
if minDebianVersion == nil || ctrlDebianVersion.LessThan(minDebianVersion) {
minDebianVersion = ctrlDebianVersion
}
default:
continue
}
}
if minUbuntuVersion == nil {
requirements.RemoveValue(minVersionUbuntuValuesKey)
} else {
requirements.SaveValue(minVersionUbuntuValuesKey, minUbuntuVersion.String())
}
if minDebianVersion == nil {
requirements.RemoveValue(minVersionDebianValuesKey)
} else {
requirements.SaveValue(minVersionDebianValuesKey, minDebianVersion.String())
}
return nil
}