/
multicluster.go
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/
multicluster.go
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/*
Copyright 2021 The KubeVela Authors.
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 multicluster
import (
"github.com/pkg/errors"
"sigs.k8s.io/controller-runtime/pkg/client"
monitorContext "github.com/kubevela/pkg/monitor/context"
wfContext "github.com/kubevela/workflow/pkg/context"
"github.com/kubevela/workflow/pkg/cue/model/value"
wfTypes "github.com/kubevela/workflow/pkg/types"
"github.com/oam-dev/kubevela/apis/core.oam.dev/v1alpha1"
"github.com/oam-dev/kubevela/apis/core.oam.dev/v1beta1"
"github.com/oam-dev/kubevela/pkg/appfile"
"github.com/oam-dev/kubevela/pkg/multicluster"
pkgpolicy "github.com/oam-dev/kubevela/pkg/policy"
"github.com/oam-dev/kubevela/pkg/policy/envbinding"
oamProvider "github.com/oam-dev/kubevela/pkg/workflow/providers/oam"
)
const (
// ProviderName is provider name for install.
ProviderName = "multicluster"
)
type provider struct {
client.Client
app *v1beta1.Application
af *appfile.Appfile
apply oamProvider.ComponentApply
healthCheck oamProvider.ComponentHealthCheck
renderer oamProvider.WorkloadRenderer
}
// MakePlacementDecisions
// Deprecated
func (p *provider) MakePlacementDecisions(ctx monitorContext.Context, _ wfContext.Context, v *value.Value, _ wfTypes.Action) error {
policy, err := v.GetString("inputs", "policyName")
if err != nil {
return err
}
env, err := v.GetString("inputs", "envName")
if err != nil {
return err
}
val, err := v.LookupValue("inputs", "placement")
if err != nil {
return err
}
// TODO detect env change
placement := &v1alpha1.EnvPlacement{}
if err = val.UnmarshalTo(placement); err != nil {
return errors.Wrapf(err, "failed to parse placement while making placement decision")
}
var namespace, clusterName string
// check if namespace selector is valid
if placement.NamespaceSelector != nil {
if len(placement.NamespaceSelector.Labels) != 0 {
return errors.Errorf("invalid env %s: namespace selector in cluster-gateway does not support label selector for now", env)
}
namespace = placement.NamespaceSelector.Name
}
// check if cluster selector is valid
if placement.ClusterSelector != nil {
if len(placement.ClusterSelector.Labels) != 0 {
return errors.Errorf("invalid env %s: cluster selector does not support label selector for now", env)
}
clusterName = placement.ClusterSelector.Name
}
// set fallback cluster
if clusterName == "" {
clusterName = multicluster.ClusterLocalName
}
// check if target cluster exists
if clusterName != multicluster.ClusterLocalName {
if _, err := multicluster.GetVirtualCluster(ctx, p.Client, clusterName); err != nil {
return errors.Wrapf(err, "failed to get cluster %s for env %s", clusterName, env)
}
}
// write result back
decisions := []v1alpha1.PlacementDecision{{
Cluster: clusterName,
Namespace: namespace,
}}
if err = envbinding.WritePlacementDecisions(p.app, policy, env, decisions); err != nil {
return err
}
return v.FillObject(map[string]interface{}{"decisions": decisions}, "outputs")
}
// PatchApplication
// Deprecated
func (p *provider) PatchApplication(_ monitorContext.Context, _ wfContext.Context, v *value.Value, _ wfTypes.Action) error {
env, err := v.GetString("inputs", "envName")
if err != nil {
return err
}
patch := v1alpha1.EnvPatch{}
selector := &v1alpha1.EnvSelector{}
obj, err := v.LookupValue("inputs", "patch")
if err == nil {
if err = obj.UnmarshalTo(&patch); err != nil {
return errors.Wrapf(err, "failed to unmarshal patch for env %s", env)
}
}
obj, err = v.LookupValue("inputs", "selector")
if err == nil {
if err = obj.UnmarshalTo(selector); err != nil {
return errors.Wrapf(err, "failed to unmarshal selector for env %s", env)
}
} else {
selector = nil
}
newApp, err := envbinding.PatchApplication(p.app, &patch, selector)
if err != nil {
return errors.Wrapf(err, "failed to patch app for env %s", env)
}
return v.FillObject(newApp, "outputs")
}
func (p *provider) ListClusters(ctx monitorContext.Context, _ wfContext.Context, v *value.Value, _ wfTypes.Action) error {
secrets, err := multicluster.ListExistingClusterSecrets(ctx, p.Client)
if err != nil {
return err
}
var clusters []string
for _, secret := range secrets {
clusters = append(clusters, secret.Name)
}
return v.FillObject(clusters, "outputs", "clusters")
}
func (p *provider) Deploy(ctx monitorContext.Context, _ wfContext.Context, v *value.Value, act wfTypes.Action) error {
param := DeployParameter{}
if err := v.CueValue().Decode(¶m); err != nil {
return err
}
if param.Parallelism <= 0 {
return errors.Errorf("parallelism cannot be smaller than 1")
}
executor := NewDeployWorkflowStepExecutor(p.Client, p.af, p.apply, p.healthCheck, p.renderer, param)
healthy, reason, err := executor.Deploy(ctx)
if err != nil {
return err
}
if !healthy {
act.Wait(reason)
}
return nil
}
func (p *provider) GetPlacementsFromTopologyPolicies(ctx monitorContext.Context, _ wfContext.Context, v *value.Value, _ wfTypes.Action) error {
policyNames, err := v.GetStringSlice("policies")
if err != nil {
return err
}
policies, err := selectPolicies(p.af.Policies, policyNames)
if err != nil {
return err
}
placements, err := pkgpolicy.GetPlacementsFromTopologyPolicies(ctx, p.Client, p.af.Namespace, policies, true)
if err != nil {
return err
}
return v.FillObject(placements, "placements")
}
// Install register handlers to provider discover.
func Install(p wfTypes.Providers, c client.Client, app *v1beta1.Application, af *appfile.Appfile, apply oamProvider.ComponentApply, healthCheck oamProvider.ComponentHealthCheck, renderer oamProvider.WorkloadRenderer) {
prd := &provider{Client: c, app: app, af: af, apply: apply, healthCheck: healthCheck, renderer: renderer}
p.Register(ProviderName, map[string]wfTypes.Handler{
"make-placement-decisions": prd.MakePlacementDecisions,
"patch-application": prd.PatchApplication,
"list-clusters": prd.ListClusters,
"get-placements-from-topology-policies": prd.GetPlacementsFromTopologyPolicies,
"deploy": prd.Deploy,
})
}