add script to generate N number of resources/policies

examples/policy_generate_networkPolicy.yaml

@@ -1,10 +1,10 @@
 apiVersion: kyverno.io/v1alpha1
 kind: Policy
 metadata:
-  name: "default-networkPolicy"
+  name: "default-networkpolicy"
 spec:
   rules:
-  - name: "default-networkPolicy"
+  - name: "default-networkpolicy"
     match:
       resources: 
         kinds:
@@ -12,7 +12,7 @@ spec:
         name: "devtest"
     generate: 
       kind: NetworkPolicy
-      name: default-networkPolicy
+      name: default-networkpolicy
       data:
         spec:
           # select all pods in the namespace

test/generate-resource/generate.sh

@@ -0,0 +1,41 @@
+#!/bin/bash
+
+### To use this script to generate resource:
+### ./resource.sh --file=resource.yaml --replica=10
+
+for i in "$@"
+do
+case $i in
+    --file=*)
+    file="${i#*=}"
+    shift
+    ;;
+    --replica=*)
+    replica="${i#*=}"
+    shift
+    ;;
+esac
+done
+
+if [ -z "${file}" ]; then
+  echo -e "Please specify '--file' where resource is located."
+  exit 1
+fi
+
+if [ -z "${replica}" ]; then
+  echo -e "Please specify '--replica' of the number of replicas you want to create."
+  exit 1
+fi
+
+echo "loading resource from ${file}"
+RESOURCE=$(cat ${file} | sed -n -e 's/^  name: //p')
+
+echo "generating ${replica} replicas from resource $RESOURCE"
+
+for i in $(seq 1 ${replica})
+do
+    # echo `cat ${file} | sed "s/name: ${RESOURCE}/name: ${RESOURCE}-${i}/"`
+    dstfile=`sed 's/.\{5\}$/-$i&/' <<< "${file}"`
+    cat ${file} | sed "s/name: ${RESOURCE}/name: ${RESOURCE}-${i}/" > ${dstfile}
+done
+

test/generate-resource/main.go

@@ -14,7 +14,7 @@ import (
 	yaml "k8s.io/apimachinery/pkg/util/yaml"
 )
 
-var policyPath, resourcePath string
+var policyPath, replica string
 
 func main() {
 	generatePolicies()
@@ -22,7 +22,6 @@ func main() {
 
 func generatePolicies() error {
 	var policy *kubepolicy.Policy
-	numbers := 10
 
 	file, err := ioutil.ReadFile(policyPath)
 	if err != nil {
@@ -41,8 +40,8 @@ func generatePolicies() error {
 	}
 
 	oldName := policy.Name
-
-	for i := 0; i < numbers; i++ {
+	repl, _ := strconv.Atoi(replica)
+	for i := 0; i < repl; i++ {
 		newName := oldName + "-" + strconv.Itoa(i)
 		data := bytes.Replace(file, []byte(oldName), []byte(newName), -1)
 
@@ -68,7 +67,7 @@ func writeToFile(data []byte, filename string) {
 
 func init() {
 	flag.StringVar(&policyPath, "policyPath", "", "Path to a policy")
-	flag.StringVar(&resourcePath, "resourcePath", "", "Path to a resource")
+	flag.StringVar(&replica, "replica", "10", "the number of replicas to generate")
 
 	flag.Parse()
 }