Merge pull request bowei#3 from colindev/master

fix shell script error (miss `"`)

Author: bowei

daemon.yaml

@@ -33,6 +33,9 @@ spec:
           image: gcr.io/google_containers/k8s-custom-iptables:1.0
           imagePullPolicy: Always
           command: [ "sh", "-c", "/run.sh" ]
+          env:
+            - name: SLEEP_INTERVAL
+              value: '30'
           resources:
             requests:
               cpu: 5m

run.sh

@@ -78,7 +78,7 @@ main() {
       done
     fi
 
-    if [[ -z ${nat_rules} ]]; then
+    if [[ -z "${nat_rules}" ]]; then
       log "No NAT rules configured"
     else
       for subnet in ${old_nat_rules}; do