Move customizations of /srv/salt to overlay

Also see #1783.

cluster/vsphere/templates/create-dynamic-salt-files.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+
+# Copyright 2014 Google Inc. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Create the overlay files for the salt tree.  We create these in a separate
+# place so that we can blow away the rest of the salt configs on a kube-push and
+# re-apply these.
+
+mkdir -p /srv/salt-overlay/pillar
+cat <<EOF >/srv/salt-overlay/pillar/cluster-params.sls
+node_instance_prefix: $NODE_INSTANCE_PREFIX
+portal_net: $PORTAL_NET
+EOF
+
+mkdir -p /srv/salt-overlay/salt/nginx
+echo $MASTER_HTPASSWD > /srv/salt-overlay/salt/nginx/htpasswd

cluster/vsphere/templates/salt-master.sh

@@ -28,11 +28,6 @@ grains:
   cloud: vsphere
 EOF
 
-cat <<EOF >/srv/pillar/cluster-params.sls
-node_instance_prefix: $NODE_INSTANCE_PREFIX
-portal_net: $PORTAL_NET
-EOF
-
 # Auto accept all keys from minions that try to join
 mkdir -p /etc/salt/master.d
 cat <<EOF >/etc/salt/master.d/auto-accept.conf
@@ -48,9 +43,6 @@ reactor:
     - /srv/reactor/highstate-minions.sls
 EOF
 
-mkdir -p /srv/salt/nginx
-echo $MASTER_HTPASSWD > /srv/salt/nginx/htpasswd
-
 # Install Salt
 #
 # We specify -X to avoid a race condition that can cause minion failure to