Merge "Add Prometheus node_exporter"

prometheus/README.rst

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+Install Prometheus
+##################
+:tags: openstack, ansible
+
+About this repository
+---------------------
+
+This set of playbooks will deploy Prometheus. If this is being deployed as part of
+an OpenStack all of the inventory needs will be provided for.
+
+**These playbooks require Ansible 2.4+.**
+
+Deployment Process
+------------------
+
+Clone the repo
+
+.. code-block:: bash
+
+    cd /opt
+    git clone https://github.com/openstack/openstack-ansible-ops
+
+Downloading role dependencies
+
+.. code-block:: bash
+
+    cd /opt/openstack-ansible-ops/prometheus
+    ansible-galaxy install -r ansible-role-requirements.yml
+
+
+Install node_exporter
+
+.. code-block:: bash
+
+    cd /opt/openstack-ansible-ops/prometheus
+    openstack-ansible installNodeExporter.yml

prometheus/ansible-role-requirements.yml

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+---
+- name: node-exporter
+  scm: git
+  src: https://github.com/cloudalchemy/ansible-node-exporter
+  version: master

prometheus/installNodeExporter.yml

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+---
+# 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.
+
+- name: node_exporter
+  hosts: hosts
+  vars_files:
+    - vars/variables.yml
+  roles:
+    - role: node-exporter

prometheus/vars/variables.yml

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+node_exporter_web_listen_address: "{{ ansible_host }}:9100"