docs: minor edit to overview of prod node setup

docs/source/prod-node-setup-mgmt/overview.md

@@ -9,7 +9,7 @@ Deploying and managing a production BigchainDB node is much more involved than w
 
 Thankfully, there are tools that can help (e.g. provisioning tools and configuration management tools). You can use whatever tools you prefer.
 
-As an example, we provide documentation and code showing how to use Terraform and Ansible (together).
+As an example, we provide documentation and code showing how to use Terraform and Ansible (together). We use:
 
 * [Terraform](https://www.terraform.io/) to provision infrastructure such as AWS instances, storage and security groups
 * [Ansible](https://www.ansible.com/) to manage the software installed on that infrastructure (configuration management)

ntools/one-m/ansible/roles/common/tasks/main.yml

@@ -0,0 +1,31 @@
+---
+# ansible/roles/common/tasks/main.yml
+
+- name: Do the equivalent of apt-get update
+  apt: update_cache=yes
+
+- name: Uninstall ntpdate (deprecated)
+  apt: name=ntpdate state=absent
+  tags: ntp
+
+- name: Update all installed packages to their latest versions
+  apt: upgrade=dist
+
+- name: Install ntp
+  apt: name=ntp state=latest update_cache=yes
+  tags: ntp
+
+#- name: Configure ntp file
+#  template: src=ntp.conf.j2 dest=/etc/ntp.conf
+#  tags: ntp
+  # "restart ntp" is the name of a handler (in common/handlers/main.yml)
+#  notify: restart ntp
+
+- name: Start the ntp service
+  service: name=ntpd state=started enabled=yes
+  tags: ntp
+
+#- name: test to see if selinux is running
+#  command: getenforce
+#  register: sestatus
+#  changed_when: false