Rancher入门到精通-2.0 cicd kubernetes.default: Name or service not known

java.net.UnknownHostException: kubernetes.default: Name or service not known
	at java.net.Inet4AddressImpl.lookupAllHostAddr(Native Method)
	at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:929)
	at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1324)
	at java.net.InetAddress.getAllByName0(InetAddress.java:1277)
	at java.net.InetAddress.getAllByName(InetAddress.java:1193)
	at java.net.InetAddress.getAllByName(InetAddress.java:1127)
	at okhttp3.Dns$1.lookup(Dns.java:40)
	at okhttp3.internal.connection.RouteSelector.resetNextInetSocketAddress(RouteSelector.java:185)
	at okhttp3.internal.connection.RouteSelector.nextProxy(RouteSelector.java:149)
	at okhttp3.internal.connection.RouteSelector.next(RouteSelector.java:84)
	at okhttp3.internal.connection.StreamAllocation.findConnection(StreamAllocation.java:214)
	at okhttp3.internal.connection.StreamAllocation.findHealthyConnection(StreamAllocation.java:135)
	at okhttp3.inte