From 38b7fd3d8994ad066da363693269cad6a3474712 Mon Sep 17 00:00:00 2001
From: Bo-Chun Louis Chen <louistw@uab.edu>
Date: Wed, 26 Feb 2025 16:30:52 -0600
Subject: [PATCH] feat: add install_node_exporter role
---
.../install_node_exporter/tasks/main.yaml | 60 +++++++++++++++++++
.../templates/node_exporter.service.j2 | 12 ++++
2 files changed, 72 insertions(+)
create mode 100644 ansible/roles/install_node_exporter/tasks/main.yaml
create mode 100644 ansible/roles/install_node_exporter/templates/node_exporter.service.j2
diff --git a/ansible/roles/install_node_exporter/tasks/main.yaml b/ansible/roles/install_node_exporter/tasks/main.yaml
new file mode 100644
index 0000000..3bee4a7
--- /dev/null
+++ b/ansible/roles/install_node_exporter/tasks/main.yaml
@@ -0,0 +1,60 @@
+---
+- name: Download node_exporter binary
+ ansible.builtin.get_url:
+ url: "https://github.com/prometheus/node_exporter/releases/download/v{{ node_exporter_ver }}/{{ node_exporter_filename }}.tar.gz"
+ dest: "/tmp/{{ node_exporter_filename }}.tar.gz"
+
+- name: Extract node_exporter
+ ansible.builtin.unarchive:
+ src: "/tmp/{{ node_exporter_filename }}.tar.gz"
+ dest: "/tmp"
+ remote_src: yes
+
+- name: Create system group for user account {{ node_exporter_group }}
+ ansible.builtin.group:
+ name: "{{ node_exporter_group }}"
+ system: true
+ state: present
+
+- name: Create system user account {{ node_exporter_user }}
+ ansible.builtin.user:
+ name: "{{ node_exporter_user }}"
+ comment: Prometheus node_exporter system account
+ group: "{{ node_exporter_group }}"
+ system: true
+ home: /var/lib/node_exporter
+ create_home: false
+ shell: /sbin/nologin
+ state: present
+
+- name: Copy node_exporter binary
+ ansible.builtin.copy:
+ src: "/tmp/{{ node_exporter_filename }}/node_exporter"
+ dest: /usr/local/bin/node_exporter
+ remote_src: yes
+ owner: root
+ group: root
+ mode: 0755
+
+- name: Copy systemd unit file
+ ansible.builtin.template:
+ src: node_exporter.service.j2
+ dest: /etc/systemd/system/node_exporter.service
+ owner: root
+ group: root
+ mode: '0644'
+
+- name: Clean up /tmp
+ ansible.builtin.file:
+ path: "/tmp/{{ item }}"
+ state: absent
+ loop:
+ - "{{ node_exporter_filename }}.tar.gz"
+ - "{{ node_exporter_filename }}"
+
+- name: Restart node_exporter service
+ ansible.builtin.systemd:
+ daemon_reload: yes
+ name: node_exporter
+ state: restarted
+ enabled: true
diff --git a/ansible/roles/install_node_exporter/templates/node_exporter.service.j2 b/ansible/roles/install_node_exporter/templates/node_exporter.service.j2
new file mode 100644
index 0000000..fddb82d
--- /dev/null
+++ b/ansible/roles/install_node_exporter/templates/node_exporter.service.j2
@@ -0,0 +1,12 @@
+[Unit]
+Description=Node Exporter
+After=network.target
+
+[Service]
+User={{ node_exporter_user }}
+Group={{ node_exporter_group }}
+Type=simple
+ExecStart=/usr/local/bin/node_exporter --web.listen-address=:{{ node_exporter_port }} --collector.filesystem.mount-points-exclude "^/(dev|proc|run/user/.+|run/credentials/.+|sys|var/lib/docker/.+)($|/)" --collector.filesystem.fs-types-exclude "^(autofs|binfmt_misc|bpf|cgroup|tmpfs|sunrpc|cgroup2?|configfs|debugfs|devpts|devtmpfs|fusectl|hugetlbfs|iso9660|mqueue|nsfs|overlay|proc|procfs|pstore|rpc_pipefs|securityfs|selinuxfs|squashfs|sysfs|tracefs)$"
+
+[Install]
+WantedBy=multi-user.target
--
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