tools: Added etcd_init.sh (#18)

* tools: Added etcd_init.sh

Created the tools directory to house non-required yet helpful tools we may want to provide along with the service code. etcd_init.sh is the first tool added which initializes the Commissaire etcd keyspace.

* fixup! tools: Added etcd_init.sh

* fixup! tools: Added etcd_init.sh

tools/etcd_init.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+#
+# Creates the expected etcd directories for Commissaire
+
+set -euo pipefail
+
+echo "+ Creating Commissaire keyspaces..."
+for x in clusters cluster hosts networks status; do
+  etcd_path="/commissaire/"$x
+  echo "++ Creating $etcd_path"
+  etcdctl mkdir $etcd_path || true
+done
+
+echo "+ Creating default network configuration..."
+DEFAULT_NETWORK_JSON=`python -c "from commissaire.constants import DEFAULT_CLUSTER_NETWORK_JSON; print(str(DEFAULT_CLUSTER_NETWORK_JSON).replace('\'', '\"'))"`
+etcdctl set /commissaire/networks/default "$DEFAULT_NETWORK_JSON"
+
+
+echo "+ Commissaire etcd namesapce now looks like the following:"
+etcdctl ls --recursive /commissaire/