K8Spider

K8Spider is a simple tools for Kubernetes Service Discovery.

It inspired from k8slanparty.com. That dnscan subnet is useful in challenges.

And I extended it ability on Kubernetes Service Discovery.

Now it supports to scan all services installed in Kubernetes cluster and all exposed ports in service.

Build

make 

Download

Checkout the release page.

Usage

# in kubernetes pods
echo $KUBERNETES_SERVICE_HOST
# if KUBERNETES_SERVICE_HOST is empty, you can use the following command to set it.
# export KUBERNETES_SERVICE_HOST=x.x.x.x
# or ./k8spider -c x.x.x.x/16 all
./k8spider all

Example

root@pod:/var/www/html/tools# env |grep KUBERNETES
KUBERNETES_SERVICE_PORT_HTTPS=443
KUBERNETES_SERVICE_PORT=443
KUBERNETES_PORT_443_TCP=tcp://10.43.0.1:443
KUBERNETES_PORT_443_TCP_PROTO=tcp
KUBERNETES_PORT_443_TCP_ADDR=10.43.0.1
KUBERNETES_SERVICE_HOST=10.43.0.1
KUBERNETES_PORT=tcp://10.43.0.1:443
KUBERNETES_PORT_443_TCP_PORT=443
root@pod:/var/www/html/tools# ./k8spider all -c 10.43.43.1/24
INFO[0000] PTRrecord 10.43.43.87 --> kube-state-metrics.lens-metrics.svc.cluster.local. 
INFO[0000] PTRrecord 10.43.43.93 --> metrics-server.kube-system.svc.cluster.local. 
INFO[0000] SRVRecord: kube-state-metrics.lens-metrics.svc.cluster.local. --> kube-state-metrics.lens-metrics.svc.cluster.local.:8080 
INFO[0000] SRVRecord: metrics-server.kube-system.svc.cluster.local. --> metrics-server.kube-system.svc.cluster.local.:443 
INFO[0000] {"Ip":"10.43.43.87","SvcDomain":"kube-state-metrics.lens-metrics.svc.cluster.local.","SrvRecords":[{"Cname":"kube-state-metrics.lens-metrics.svc.cluster.local.","Srv":[{"Target":"kube-state-metrics.lens-metrics.svc.cluster.local.","Port":8080,"Priority":0,"Weight":100}]}]}