在Kubernetes中检索服务的全名 [英] Retrieve the full name of a service in Kubernetes

问题描述

默认情况下，根据 k8s文档，为服务分配了一个DNS A记录，格式为my-svc.my-namespace.svc.cluster-domain.example.

By default,according to k8s documentation, Services are assigned a DNS A record for a name of the form my-svc.my-namespace.svc.cluster-domain.example.

是否有用于检索服务全名的命令?

Is there a command to retrieve the full name of a service?

推荐答案

您可以从任何Pod进行DNS查询，您将获得FQDN.

You can do a DNS query from any pod and you would get the FQDN.

# nslookup api-server
Server:     10.96.0.10
Address:    10.96.0.10#53

Name:   api-server.default.svc.cluster.local
Address: 10.104.225.18

root@api-server-6ff8c8b9c-6pgkb:/#

cluster-domain.example只是文档中的一个示例. cluster.local是分配的默认群集域.因此，默认情况下任何服务的FQDN为<service-name>.<namespace>.svc.cluster.local.

cluster-domain.example is just a example in the documentation. cluster.local is the default cluster domain assigned. So the FQDN of any service by default would be <service-name>.<namespace>.svc.cluster.local.

您不需要使用FQDN来访问服务-对于相同名称空间中的服务，只需服务名称就足够了.对于其他名称空间中的服务，<service-name>.<namespace>就足够了，因为kubernetes会自动设置DNS搜索域.

You don't need to use the FQDN to access services - for services in same namespace, just the service name would be enough. For services in other namespaces, <service-name>.<namespace> would be enough as kubernetes would automatically set up the DNS search domains.

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