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pulsar-admin.go
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pulsar-admin.go
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//
// Copyright (c) 2020-2021 Datastax, Inc.
//
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you 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 cfg
import (
"crypto/tls"
"crypto/x509"
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
"net/url"
"time"
log "github.com/apex/log"
"github.com/datastax/pulsar-heartbeat/src/util"
"github.com/hashicorp/go-retryablehttp"
)
// PulsarAdminTenant probes the tenant endpoint to get a list of tenants
// returns the number of tenants on the cluster
func PulsarAdminTenant(clusterURL string, tokenSupplier func()(string,error)) (int, error) {
client := retryablehttp.NewClient()
client.RetryWaitMin = 4 * time.Second
client.RetryWaitMax = 64 * time.Second
client.RetryMax = 2
caCertFile := GetConfig().TrustStore
if caCertFile != "" {
caCert, err := ioutil.ReadFile(caCertFile)
if err != nil {
return 0, fmt.Errorf("error opening cert file %s, Error: %v", caCertFile, err)
}
caCertPool := x509.NewCertPool()
caCertPool.AppendCertsFromPEM(caCert)
t := &http.Transport{
TLSClientConfig: &tls.Config{
RootCAs: caCertPool,
},
}
client.HTTPClient = &http.Client{
Transport: t,
}
}
client.HTTPClient.Timeout = time.Duration(30) * time.Second
req, err := retryablehttp.NewRequest(http.MethodGet, clusterURL, nil)
if err != nil {
return 0, err
}
if tokenSupplier != nil {
token, err := tokenSupplier()
if err != nil {
return 0, err
}
req.Header.Add("Authorization", "Bearer "+token)
}
resp, err := client.Do(req)
if resp != nil {
defer resp.Body.Close()
}
if err != nil {
return 0, err
}
bodyBytes, err := ioutil.ReadAll(resp.Body)
if err != nil {
return 0, err
}
var tenants []string
err = json.Unmarshal(bodyBytes, &tenants)
if err != nil {
return 0, err
}
return len(tenants), nil
}
// PulsarTenants get a list of tenants on each cluster
func PulsarTenants() {
clusters := GetConfig().PulsarAdminConfig.Clusters
tokenSupplier := util.TokenSupplierWithOverride(GetConfig().PulsarAdminConfig.Token, GetConfig().TokenSupplier())
for _, cluster := range clusters {
adminURL, err := url.ParseRequestURI(cluster.URL)
if err != nil {
panic(err) //panic because this is a showstopper
}
clusterName := adminURL.Hostname()
queryURL := util.SingleSlashJoin(cluster.URL, "/admin/v2/tenants")
tenantSize, err := PulsarAdminTenant(queryURL, tokenSupplier)
if err != nil {
errMsg := fmt.Sprintf("tenant-test failed on cluster %s error: %v", queryURL, err)
log.Errorf(clusterName + "-pulsar-admin " + errMsg)
ReportIncident(cluster.Name, clusterName, "persisted cluster tenants test failure", errMsg, &cluster.AlertPolicy)
} else {
PromGaugeInt(TenantsGaugeOpt(), cluster.Name, tenantSize)
ClearIncident(cluster.Name)
if tenantSize == 0 {
log.Errorf("cluster %s pulsar-admin has incorrect number of tenants 0", cluster.Name)
} else {
log.Infof("cluster %s has %d numbers of tenants", clusterName, tenantSize)
}
}
}
}