Merge pull request #5016 from Raffo/patch-1

Fixes environment variable export.

docs/networking.md

@@ -71,7 +71,7 @@ The `--networking` option accepts the three different values defined above: `kub
 The following command sets up a cluster, in HA mode, that is ready for a CNI installation.
 
 ```console
-$ export $ZONE=mylistofzones
+$ export ZONES=mylistofzones
 $ kops create cluster \
   --zones $ZONES \
   --master-zones $ZONES \
@@ -117,7 +117,7 @@ spec:
 The following command sets up a cluster, in HA mode, with Calico as the CNI and Network Policy provider.
 
 ```console
-$ export $ZONES=mylistofzones
+$ export ZONES=mylistofzones
 $ kops create cluster \
   --zones $ZONES \
   --master-zones $ZONES \
@@ -208,7 +208,7 @@ Canal is a project that combines [Flannel](https://github.com/coreos/flannel) an
 The following command sets up a cluster, in HA mode, with Canal as the CNI and networking policy provider
 
 ```console
-$ export $ZONES=mylistofzones
+$ export ZONES=mylistofzones
 $ kops create cluster \
   --zones $ZONES \
   --master-zones $ZONES \
@@ -268,7 +268,7 @@ No additional configurations are required to be done by user. Kube-router automa
 The following command sets up a cluster with Romana as the CNI.
 
 ```console
-$ export $ZONES=mylistofzones
+$ export ZONES=mylistofzones
 $ kops create cluster \
   --zones $ZONES \
   --master-zones $ZONES \