Added possibility to overwrite ENABLE_CLUSTER_DNS with env var

cluster/addons/dns/README.md

@@ -75,7 +75,7 @@ cluster turn-up to create the SkyDNS pods and configure the kubelets.  For
 example, see `cluster/gce/config-default.sh`.
 
 ```sh
-ENABLE_CLUSTER_DNS=true
+ENABLE_CLUSTER_DNS="${KUBE_ENABLE_CLUSTER_DNS:-true}"
 DNS_SERVER_IP="10.0.0.10"
 DNS_DOMAIN="cluster.local"
 DNS_REPLICAS=1

cluster/aws/config-default.sh

@@ -72,7 +72,7 @@ if [[ ${KUBE_ENABLE_INSECURE_REGISTRY:-false} == "true" ]]; then
 fi
 
 # Optional: Install cluster DNS.
-ENABLE_CLUSTER_DNS=true
+ENABLE_CLUSTER_DNS="${KUBE_ENABLE_CLUSTER_DNS:-true}"
 DNS_SERVER_IP="10.0.0.10"
 DNS_DOMAIN="cluster.local"
 DNS_REPLICAS=1

cluster/aws/config-test.sh

@@ -68,7 +68,7 @@ if [[ ${KUBE_ENABLE_INSECURE_REGISTRY:-false} == "true" ]]; then
 fi
 
 # Optional: Install cluster DNS.
-ENABLE_CLUSTER_DNS=true
+ENABLE_CLUSTER_DNS="${KUBE_ENABLE_CLUSTER_DNS:-true}"
 DNS_SERVER_IP="10.0.0.10"
 DNS_DOMAIN="cluster.local"
 DNS_REPLICAS=1

cluster/gce/config-default.sh

@@ -69,7 +69,7 @@ if [[ ${KUBE_ENABLE_INSECURE_REGISTRY:-false} == "true" ]]; then
 fi
 
 # Optional: Install cluster DNS.
-ENABLE_CLUSTER_DNS=true
+ENABLE_CLUSTER_DNS="${KUBE_ENABLE_CLUSTER_DNS:-true}"
 DNS_SERVER_IP="10.0.0.10"
 DNS_DOMAIN="cluster.local"
 DNS_REPLICAS=1

cluster/gce/config-test.sh

@@ -67,7 +67,7 @@ if [[ ${KUBE_ENABLE_INSECURE_REGISTRY:-false} == "true" ]]; then
 fi
 
 # Optional: Install cluster DNS.
-ENABLE_CLUSTER_DNS=true
+ENABLE_CLUSTER_DNS="${KUBE_ENABLE_CLUSTER_DNS:-true}"
 DNS_SERVER_IP="10.0.0.10"
 DNS_DOMAIN="cluster.local"
 DNS_REPLICAS=1

cluster/libvirt-coreos/config-default.sh

@@ -53,7 +53,7 @@ ENABLE_NODE_LOGGING=false
 LOGGING_DESTINATION=elasticsearch
 
 # Optional: Install cluster DNS.
-ENABLE_CLUSTER_DNS=true
+ENABLE_CLUSTER_DNS="${KUBE_ENABLE_CLUSTER_DNS:-true}"
 DNS_SERVER_IP="10.11.0.254"
 DNS_DOMAIN="cluster.local"
 DNS_REPLICAS=1

cluster/rackspace/config-default.sh

@@ -53,7 +53,7 @@ ELASTICSEARCH_LOGGING_REPLICAS=1
 ENABLE_CLUSTER_MONITORING="${KUBE_ENABLE_CLUSTER_MONITORING:-influxdb}"
 
 # Optional: Install cluster DNS.
-ENABLE_CLUSTER_DNS=true
+ENABLE_CLUSTER_DNS="${KUBE_ENABLE_CLUSTER_DNS:-true}"
 DNS_SERVER_IP="10.0.0.10"
 DNS_DOMAIN="cluster.local"
 DNS_REPLICAS=1

cluster/ubuntu/config-default.sh

@@ -55,7 +55,7 @@ ENABLE_CLUSTER_MONITORING="${KUBE_ENABLE_CLUSTER_MONITORING:-true}"
 DOCKER_OPTS=${DOCKER_OPTS:-""}
 
 # Optional: Install cluster DNS.
-ENABLE_CLUSTER_DNS=true
+ENABLE_CLUSTER_DNS="${KUBE_ENABLE_CLUSTER_DNS:-true}"
 # DNS_SERVER_IP must be a IP in SERVICE_CLUSTER_IP_RANGE
 DNS_SERVER_IP=${DNS_SERVER_IP:-"192.168.3.10"}
 DNS_DOMAIN=${DNS_DOMAIN:-"cluster.local"}

cluster/vagrant/config-default.sh

@@ -74,7 +74,7 @@ ENABLE_CLUSTER_MONITORING="${KUBE_ENABLE_CLUSTER_MONITORING:-influxdb}"
 EXTRA_DOCKER_OPTS="-b=cbr0 --insecure-registry 10.0.0.0/8"
 
 # Optional: Install cluster DNS.
-ENABLE_CLUSTER_DNS=true
+ENABLE_CLUSTER_DNS="${KUBE_ENABLE_CLUSTER_DNS:-true}"
 DNS_SERVER_IP="10.247.0.10"
 DNS_DOMAIN="cluster.local"
 DNS_REPLICAS=1

cluster/vsphere/config-default.sh

@@ -48,7 +48,7 @@ ELASTICSEARCH_LOGGING_REPLICAS=1
 ENABLE_CLUSTER_MONITORING="${KUBE_ENABLE_CLUSTER_MONITORING:-influxdb}"
 
 # Optional: Install cluster DNS.
-ENABLE_CLUSTER_DNS=true
+ENABLE_CLUSTER_DNS="${KUBE_ENABLE_CLUSTER_DNS:-true}"
 DNS_SERVER_IP="10.244.240.240"
 DNS_DOMAIN="cluster.local"
 DNS_REPLICAS=1

docs/getting-started-guides/ubuntu.md

@@ -158,7 +158,7 @@ After the previous parts, you will have a working k8s cluster, this part will te
 The configuration of dns is configured in cluster/ubuntu/config-default.sh.
 
 ```sh
-ENABLE_CLUSTER_DNS=true
+ENABLE_CLUSTER_DNS="${KUBE_ENABLE_CLUSTER_DNS:-true}"
 
 DNS_SERVER_IP="192.168.3.10"