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#作者：Unstopabler

在基于 Kubernetes 环境部署和管理 Apache Pulsar 时，通常会使用 kubectl 命令行工具来与集群进行交互。以下是一些常用的命令及其应用场景：

示例有如下pulsar集群

kubectl get pods -n pulsar
pulsar                 pulsar-bookie-0                                        1/1     Running  
pulsar                 pulsar-bookie-1                                        1/1     Running  
pulsar                 pulsar-bookie-2                                        1/1     Running  
pulsar                 pulsar-broker-0                                        1/1     Running  
pulsar                 pulsar-broker-1                                        1/1     Running  
pulsar                 pulsar-broker-2                                        1/1     Running  
pulsar                 pulsar-manager-7d464db5d5-rcrjt                        1/1     Running  
pulsar                 pulsar-proxy-0                                         1/1     Running  
pulsar                 pulsar-proxy-1                                         1/1     Running  
pulsar                 pulsar-proxy-2                                         1/1     Running  
pulsar                 pulsar-pulsar-init-b2xlw                               0/1     Completed
pulsar                 pulsar-recovery-0                                      1/1     Running  
pulsar                 pulsar-toolset-0                                       1/1     Running  
pulsar                 pulsar-zookeeper-0                                     1/1     Running  
pulsar                 pulsar-zookeeper-1                                     1/1     Running  
pulsar                 pulsar-zookeeper-2                                     1/1     Running  

生产者

kubectl exec pulsar-toolset-0 -n pulsar – bin/pulsar-client produce persistent://mytenant/mynamespace/mytopic --messages “Hello Pulsar” --num-produce 5向mytopic这个topic生产数据，内容为“hello-pulsar”，如果mytopic不存在，pulsar会自动创建,5个消息。

消费者

kubectl exec pulsar-toolset-0 -n pulsar – bin/pulsar-client consume persistent://mytenant/mynamespace/mytopic --subscription-name my-subscription --num-messages 5消费mytopic的数据，订阅名称为“subscription", 如果mytopic不存在，pulsar会自动创建，消费5个消息

查看生产/消费延迟：

kubectl exec pulsar-toolset-0 -n pulsar – bin/pulsar-admin topics stats persistent://mytenant/mynamespace/mytopic |grep “msgRate”

查看生产/消费订阅积压

kubectl exec pulsar-toolset-0 -n pulsar – bin/pulsar-admin topics stats persistent://mytenant/mynamespace/mytopic |grep “msgBacklog”

tenants

查看所有tenants
kubectl exec pulsar-toolset-0 -n pulsar – bin/pulsar-admin tenants list

查看具体租户
kubectl -n pulsar exec -it pulsar-toolset-0 – bin/pulsar-admin tenants get mytenant

创建tenants
kubectl exec pulsar-toolset-0 -n pulsar – bin/pulsar-admin tenants create mytenant

删除tenants
kubectl exec pulsar-toolset-0 -n pulsar – bin/pulsar-admin tenants delete mytenant

broker

查看存活的broker信息
kubectl exec pulsar-toolset-0 -n pulsar – bin/pulsar-admin brokers list use

查看broke如上的namesapce
kubectl exec pulsar-toolset-0 -n pulsar – bin/pulsar-admin brokers namespaces use --url pulsar-broker.com:8080

查看可以动态更新的配置
kubectl exec pulsar-toolset-0 -n pulsar – bin/pulsar-admin brokers list-dynamic-config

查看已经动态更新过的配置
kubectl exec pulsar-toolset-0 -n pulsar – bin/pulsar-admin brokers get-all-dynamic-config

动态更新配置示例：
kubectl exec pulsar-toolset-0 -n pulsar – bin/pulsar-admin brokers update-dynamic-config brokerShutdownTimeoutMs 100

namespace

查看tenant下的所有namespace
kubectl exec pulsar-toolset-0 -n pulsar – bin/pulsar-admin namespaces list mytenant

创建namespace
kubectl exec pulsar-toolset-0 -n pulsar – bin/pulsar-admin namespaces create mytenant/mynamespace

查看namespace策略
kubectl exec pulsar-toolset-0 -n pulsar – bin/pulsar-admin namespaces policies mytenant/mynamespace

删除namespace
kubectl exec pulsar-toolset-0 -n pulsar – bin/pulsar-admin namespaces delete mytenant/mynamespace