feat(controller): Toggle registration using etcd

Allow to disable or enable the registration using
an etcd setting.

Author: johanneswuerbach

controller/bin/boot

@@ -29,6 +29,7 @@ if ! etcdctl --no-sync -C $ETCD ls $ETCD_PATH >/dev/null 2>&1; then
 	etcdctl --no-sync -C $ETCD set $ETCD_PATH/protocol ${DEIS_PROTOCOL:-http} >/dev/null
 	etcdctl --no-sync -C $ETCD set $ETCD_PATH/secretKey ${DEIS_SECRET_KEY:-`openssl rand -base64 64 | tr -d '\n'`} >/dev/null
 	etcdctl --no-sync -C $ETCD set $ETCD_PATH/builderKey ${DEIS_BUILDER_KEY:-`openssl rand -base64 64 | tr -d '\n'`} >/dev/null
+	etcdctl --no-sync -C $ETCD set $ETCD_PATH/registrationEnabled True >/dev/null
 fi
 
 # wait for confd to run once and install initial templates

controller/setup.cfg

@@ -1,4 +1,4 @@
 [flake8]
 max-line-length = 99
-exclude = */api/migrations/*,*/build/*,*/venv/*,*/virtualenv/*,*/scheduler/*
+exclude = */api/migrations/*,*/build/*,*/venv/*,*/virtualenv/*,*/scheduler/*,*/templates/*
 max-complexity = 12

controller/templates/confd_settings.py

@@ -24,3 +24,7 @@
 
 # move log directory out of /app/deis
 DEIS_LOG_DIR = '/var/log/deis'
+
+{{ if .deis_controller_registrationEnabled }}
+REGISTRATION_ENABLED = {{ .deis_controller_registrationEnabled }}
+{{ end }}