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PMM-9946 Automatically add k8s cluster (percona#1125)
* PMM-9946 Automatically add k8s cluster * Check if PMM is inside k8s cluster * Get config and convert it to kubeconfig * Trigger register cluster call
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,152 @@ | ||
| // Copyright (C) 2017 Percona LLC | ||
| // | ||
| // This program is free software: you can redistribute it and/or modify | ||
| // it under the terms of the GNU Affero General Public License as published by | ||
| // the Free Software Foundation, either version 3 of the License, or | ||
| // (at your option) any later version. | ||
| // | ||
| // This program is distributed in the hope that it will be useful, | ||
| // but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| // GNU Affero General Public License for more details. | ||
| // | ||
| // You should have received a copy of the GNU Affero General Public License | ||
| // along with this program. If not, see <https://www.gnu.org/licenses/>. | ||
|
|
||
| package dbaas | ||
|
|
||
| import ( | ||
| "context" | ||
| "sync" | ||
| "time" | ||
|
|
||
| dbaascontrollerv1beta1 "github.com/percona-platform/dbaas-api/gen/controller" | ||
| "github.com/pkg/errors" | ||
| "github.com/sirupsen/logrus" | ||
| "gopkg.in/reform.v1" | ||
|
|
||
| dbaasv1beta1 "github.com/percona/pmm/api/managementpb/dbaas" | ||
| "github.com/percona/pmm/managed/models" | ||
| ) | ||
|
|
||
| // Initializer initializes dbaas feature | ||
| type Initializer struct { | ||
| db *reform.DB | ||
| l *logrus.Entry | ||
|
|
||
| dbaasClient dbaasClient | ||
| kubernetesServer dbaasv1beta1.KubernetesServer | ||
|
|
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| enabled bool | ||
| cancel func() | ||
| m sync.Mutex | ||
| } | ||
|
|
||
| const defaultClusterName = "default-pmm-cluster" | ||
|
|
||
| var errClusterExists = errors.New("cluster already exists") | ||
|
|
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| // NewInitializer returns initialized Initializer structure | ||
| func NewInitializer(db *reform.DB, client dbaasClient) *Initializer { | ||
| l := logrus.WithField("component", "dbaas_initializer") | ||
| return &Initializer{ | ||
| db: db, | ||
| l: l, | ||
| dbaasClient: client, | ||
| } | ||
| } | ||
|
|
||
| func (in *Initializer) RegisterKubernetesServer(k dbaasv1beta1.KubernetesServer) { | ||
| in.kubernetesServer = k | ||
| } | ||
|
|
||
| // Update updates current dbaas settings | ||
| func (in *Initializer) Update(ctx context.Context) error { | ||
| settings, err := models.GetSettings(in.db) | ||
| if err != nil { | ||
| in.l.Errorf("Failed to get settings: %+v.", err) | ||
| return err | ||
| } | ||
| if settings.DBaaS.Enabled { | ||
| return in.Enable(ctx) | ||
| } | ||
| return in.Disable(ctx) | ||
| } | ||
|
|
||
| // Enable enables dbaas feature and connects to dbaas-controller | ||
| func (in *Initializer) Enable(ctx context.Context) error { | ||
| in.m.Lock() | ||
| defer in.m.Unlock() | ||
| if in.enabled { | ||
| return nil | ||
| } | ||
| timeoutCtx, cancel := context.WithTimeout(ctx, 20*time.Second) | ||
| defer cancel() | ||
| err := in.dbaasClient.Connect(timeoutCtx) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| ctx, in.cancel = context.WithCancel(ctx) | ||
|
|
||
| in.enabled = true | ||
| return in.registerInCluster(ctx) | ||
| } | ||
|
|
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| // registerIncluster automatically adds k8s cluster to dbaas when PMM is running inside k8s cluster | ||
| func (in *Initializer) registerInCluster(ctx context.Context) error { | ||
| kubeConfig, err := in.dbaasClient.GetKubeConfig(ctx, &dbaascontrollerv1beta1.GetKubeconfigRequest{}) | ||
| if err == nil { | ||
| // If err is not equal to nil, dont' register cluster and fail silently | ||
| err := in.db.InTransaction(func(t *reform.TX) error { | ||
| cluster, err := models.FindKubernetesClusterByName(t.Querier, defaultClusterName) | ||
| if err != nil { | ||
| in.l.Errorf("failed finding cluster: %v", err) | ||
| return nil | ||
| } | ||
| if cluster != nil { | ||
| return errClusterExists | ||
| } | ||
| return nil | ||
| }) | ||
| if err != nil { | ||
| if errors.Is(err, errClusterExists) { | ||
| return nil | ||
| } | ||
| return err | ||
| } | ||
| if len(kubeConfig.Kubeconfig) != 0 { | ||
| req := &dbaasv1beta1.RegisterKubernetesClusterRequest{ | ||
| KubernetesClusterName: defaultClusterName, | ||
| KubeAuth: &dbaasv1beta1.KubeAuth{ | ||
| Kubeconfig: kubeConfig.Kubeconfig, | ||
| }, | ||
| } | ||
| _, err = in.kubernetesServer.RegisterKubernetesCluster(ctx, req) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| in.l.Info("Cluster is successfully initialized") | ||
| } | ||
| } else { | ||
| in.l.Errorf("failed getting kubeconfig inside cluster: %v", err) | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| // Disable disconnects from dbaas-controller and disabled dbaas feature | ||
| func (in *Initializer) Disable(ctx context.Context) error { | ||
| in.m.Lock() | ||
| defer in.m.Unlock() | ||
| if !in.enabled { // Don't disable if already disabled | ||
| return nil | ||
| } | ||
| if in.cancel != nil { | ||
| in.cancel() | ||
| } | ||
| err := in.dbaasClient.Disconnect() | ||
| if err != nil { | ||
| return err | ||
| } | ||
| in.enabled = false | ||
| return nil | ||
| } |
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