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Implement cli for getting promethus alerts (#730)
Signed-off-by: Arnob kumar saha <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,187 @@ | ||
| /* | ||
| Copyright AppsCode Inc. and Contributors | ||
| Licensed under the AppsCode Community License 1.0.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| https://github.com/appscode/licenses/raw/1.0.0/AppsCode-Community-1.0.0.md | ||
| 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 alerts | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "log" | ||
| "strings" | ||
| "time" | ||
|
|
||
| promapi "github.com/prometheus/client_golang/api" | ||
| promv1 "github.com/prometheus/client_golang/api/prometheus/v1" | ||
| "github.com/prometheus/common/model" | ||
| metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
| "k8s.io/apimachinery/pkg/runtime/schema" | ||
| "k8s.io/client-go/dynamic" | ||
| "k8s.io/client-go/kubernetes" | ||
| _ "k8s.io/client-go/plugin/pkg/client/auth" | ||
| "k8s.io/client-go/rest" | ||
| cmdutil "k8s.io/kubectl/pkg/cmd/util" | ||
| "kmodules.xyz/client-go/tools/portforward" | ||
| "sigs.k8s.io/controller-runtime/pkg/client" | ||
| ) | ||
|
|
||
| type PromSvc struct { | ||
| Name string | ||
| Namespace string | ||
| Port int | ||
| } | ||
|
|
||
| type dbOpts struct { | ||
| db client.Object | ||
| config *rest.Config | ||
| kubeClient *kubernetes.Clientset | ||
| resource string | ||
| } | ||
|
|
||
| const ( | ||
| kubeDBGroup = "kubedb.com" | ||
| kubeDBVersion = "v1alpha2" | ||
| ) | ||
|
|
||
| func Run(f cmdutil.Factory, args []string, prom PromSvc) { | ||
| if len(args) < 2 { | ||
| log.Fatal("Enter db object's name as an argument") | ||
| } | ||
| resource := args[0] | ||
| dbName := args[1] | ||
|
|
||
| namespace, _, err := f.ToRawKubeConfigLoader().Namespace() | ||
| if err != nil { | ||
| _ = fmt.Errorf("failed to get current namespace") | ||
| } | ||
|
|
||
| opts, err := newDBOpts(f, dbName, namespace, convertedResource(resource)) | ||
| if err != nil { | ||
| log.Fatalln(err) | ||
| } | ||
|
|
||
| p, err := opts.ForwardPort("services", prom) | ||
| if err != nil { | ||
| log.Fatalln(err) | ||
| } | ||
| err = opts.work(p) | ||
| if err != nil { | ||
| log.Fatalln(err) | ||
| } | ||
| } | ||
|
|
||
| func convertedResource(resource string) string { | ||
| // standardizing the resource name | ||
| res := strings.ToLower(resource) | ||
| switch res { | ||
| case "es", "elasticsearch", "elasticsearches": | ||
| res = "elasticsearches" | ||
| case "md", "mariadb", "mariadbs": | ||
| res = "mariadbs" | ||
| case "mg", "mongodb", "mongodbs": | ||
| res = "mongodbs" | ||
| case "my", "mysql", "mysqls": | ||
| res = "mysqls" | ||
| case "pg", "postgres", "postgreses": | ||
| res = "postgreses" | ||
| case "rd", "redis", "redises": | ||
| res = "redises" | ||
| default: | ||
| fmt.Printf("%s is not a valid resource type \n", resource) | ||
| } | ||
| return res | ||
| } | ||
|
|
||
| func newDBOpts(f cmdutil.Factory, dbName, namespace, resource string) (*dbOpts, error) { | ||
| config, err := f.ToRESTConfig() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| dc, err := dynamic.NewForConfig(config) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
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| dbRes := schema.GroupVersionResource{Group: kubeDBGroup, Version: kubeDBVersion, Resource: resource} | ||
| db, err := dc.Resource(dbRes).Namespace(namespace).Get(context.TODO(), dbName, metav1.GetOptions{}) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| kubeClient, err := kubernetes.NewForConfig(config) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
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| opts := &dbOpts{ | ||
| db: db, | ||
| config: config, | ||
| kubeClient: kubeClient, | ||
| resource: resource, | ||
| } | ||
| return opts, nil | ||
| } | ||
|
|
||
| func (opts *dbOpts) ForwardPort(resource string, prom PromSvc) (*portforward.Tunnel, error) { | ||
| tunnel := portforward.NewTunnel(portforward.TunnelOptions{ | ||
| Client: opts.kubeClient.CoreV1().RESTClient(), | ||
| Config: opts.config, | ||
| Resource: resource, | ||
| Namespace: prom.Namespace, | ||
| Name: prom.Name, | ||
| Remote: prom.Port, | ||
| }) | ||
|
|
||
| if err := tunnel.ForwardPort(); err != nil { | ||
| return nil, err | ||
| } | ||
| return tunnel, nil | ||
| } | ||
|
|
||
| func (opts *dbOpts) work(p *portforward.Tunnel) error { | ||
| pc, err := promapi.NewClient(promapi.Config{ | ||
| Address: fmt.Sprintf("http://localhost:%d", p.Local), | ||
| }) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| promAPI := promv1.NewAPI(pc) | ||
| alertQuery := fmt.Sprintf("ALERTS{alertstate=\"firing\",k8s_group=\"kubedb.com\",k8s_resource=\"%s\",app=\"%s\",app_namespace=\"%s\"}", | ||
| opts.resource, opts.db.GetName(), opts.db.GetNamespace()) | ||
| result, warnings, err := promAPI.QueryRange(context.TODO(), alertQuery, promv1.Range{ | ||
| Start: time.Now().Add(-time.Hour), | ||
| End: time.Now(), | ||
| Step: time.Minute * 2, | ||
| }) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| if len(warnings) > 0 { | ||
| fmt.Println("Warnings:", warnings) | ||
| } | ||
|
|
||
| // Access the elements of the matrix using indexing. | ||
| matrix := result.(model.Matrix) | ||
| fmt.Printf("The number of firing alerts for %s %s/%s is %d \n", opts.resource, opts.db.GetNamespace(), opts.db.GetName(), matrix.Len()) | ||
| for _, sample := range matrix { | ||
| alertName := sample.Metric["alertname"] | ||
| alertValue := sample.Values[0].Value | ||
| labels := sample.Metric | ||
| fmt.Printf("Alert Name: %s, Value: %s, Labels: %s\n", alertName, alertValue, labels) | ||
| } | ||
| return nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,59 @@ | ||
| /* | ||
| Copyright AppsCode Inc. and Contributors | ||
| Licensed under the AppsCode Community License 1.0.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| https://github.com/appscode/licenses/raw/1.0.0/AppsCode-Community-1.0.0.md | ||
| 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 cmds | ||
|
|
||
| import ( | ||
| "kubedb.dev/cli/pkg/alerts" | ||
|
|
||
| "github.com/spf13/cobra" | ||
| cmdutil "k8s.io/kubectl/pkg/cmd/util" | ||
| "k8s.io/kubectl/pkg/util/i18n" | ||
| "k8s.io/kubectl/pkg/util/templates" | ||
| ) | ||
|
|
||
| var ( | ||
| alertLong = templates.LongDesc(` | ||
| Get the prometheus alerts for a specific database in just one command | ||
| `) | ||
| alertExample = templates.Examples(` | ||
| kubectl dba get-alerts mongodb -n demo sample-mongodb --prom-svc-name=prometheus-kube-prometheus-prometheus --prom-svc-namespace=monitoring | ||
| Valid resource types include: | ||
| * elasticsearch | ||
| * mongodb | ||
| * mariadb | ||
| * mysql | ||
| * postgres | ||
| * redis | ||
| `) | ||
| ) | ||
|
|
||
| func NewCmdAlert(f cmdutil.Factory) *cobra.Command { | ||
| var prom alerts.PromSvc | ||
| cmd := &cobra.Command{ | ||
| Use: "get-alerts", | ||
| Short: i18n.T("Alerts associated with a database"), | ||
| Long: alertLong, | ||
| Example: alertExample, | ||
| Run: func(cmd *cobra.Command, args []string) { | ||
| alerts.Run(f, args, prom) | ||
| }, | ||
| DisableFlagsInUseLine: true, | ||
| DisableAutoGenTag: true, | ||
| } | ||
| cmd.Flags().StringVarP(&prom.Name, "prom-svc-name", "", "", "name of the prometheus service") | ||
| cmd.Flags().StringVarP(&prom.Namespace, "prom-svc-namespace", "", "", "namespace of the prometheus service") | ||
| cmd.Flags().IntVarP(&prom.Port, "prom-svc-port", "", 9090, "port of the prometheus service") | ||
| return cmd | ||
| } |
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