3 # COPYRIGHT NOTICE STARTS HERE
5 # Copyright 2019 Samsung Electronics Co., Ltd.
7 # Licensed under the Apache License, Version 2.0 (the "License");
8 # you may not use this file except in compliance with the License.
9 # You may obtain a copy of the License at
11 # http://www.apache.org/licenses/LICENSE-2.0
13 # Unless required by applicable law or agreed to in writing, software
14 # distributed under the License is distributed on an "AS IS" BASIS,
15 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 # See the License for the specific language governing permissions and
17 # limitations under the License.
19 # COPYRIGHT NOTICE ENDS HERE
21 # Check all ports exposed outside of kubernetes cluster looking for plain http
28 # Return value: Number of discovered http ports
29 # Output: List of pods exposing http endpoints
32 if [ "$#" -lt 1 ]; then
33 echo "Usage: $0 <k8s-namespace>"
39 # Get both values on single call as this may get slow
40 PORTS_SVCS=`kubectl get svc --namespace=$K8S_NAMESPACE -o go-template='{{range $item := .items}}{{range $port := $item.spec.ports}}{{if .nodePort}}{{.nodePort}}{{"\t"}}{{$item.metadata.name}}{{"\n"}}{{end}}{{end}}{{end}}' | column -t | sort -n`
42 # Split port number and service name
43 PORTS=`awk '{print $1}' <<<"$PORTS_SVCS"`
44 SVCS=`awk '{print $2}' <<<"$PORTS_SVCS"`
46 # Create a list in nmap-compatible format
47 PORT_LIST=`tr "\\n" "," <<<"$PORTS" | sed 's/,$//'; echo ''`
49 # Get IP addres of some cluster node
50 K8S_NODE=`kubectl describe nodes \`kubectl get nodes | tail -n 1 | awk '{print $1}'\` | grep ExternalIP | awk '{print $2}'`
53 SCAN_RESULT=`nmap $K8S_NODE -sV -p $PORT_LIST 2>/dev/null | grep \tcp`
55 # Concatenate scan result with service name
56 RESULTS=`paste <(printf %s "$SVCS") <(printf %s "$SCAN_RESULT") | column -t`
58 # Find all plain http ports
59 HTTP_PORTS=`grep http <<< "$RESULTS" | grep -v ssl/http`
62 N_HTTP=`wc -l <<<"$HTTP_PORTS"`
64 if [ "$N_HTTP" -gt 0 ]; then