From e8524e950ceb299583ae559a5e6b6c2d21bc8f09 Mon Sep 17 00:00:00 2001
From: shockrah <dev@shockrah.xyz>
Date: Wed, 27 Apr 2022 21:24:06 -0700
Subject: [PATCH] + Working prometheus setup for host metrics

---
 .../files/services/node_exporter.service      | 17 +++++
 docker-host/setup/tasks/prometheus.yml        | 63 +++++++++++++++++++
 docker-host/setup/templates/prometheus.yml.j2 | 26 ++++++++
 docker-host/setup/vars/main.yml               |  1 +
 4 files changed, 107 insertions(+)
 create mode 100644 docker-host/setup/files/services/node_exporter.service
 create mode 100644 docker-host/setup/tasks/prometheus.yml
 create mode 100644 docker-host/setup/templates/prometheus.yml.j2

diff --git a/docker-host/setup/files/services/node_exporter.service b/docker-host/setup/files/services/node_exporter.service
new file mode 100644
index 0000000..b28b189
--- /dev/null
+++ b/docker-host/setup/files/services/node_exporter.service
@@ -0,0 +1,17 @@
+[Unit]
+Description=Node Exporter which exposes host metrics for Prometheus
+After=network.target
+
+[Service]
+WorkingDirectory=/opt/prom-node-exporter
+Type=simple
+Restart=simple
+Restart=always
+Restart=10
+ExecStart=/opt/prom-node-exporter/node_exporter
+
+[Install]
+WantedBy=multi-user.target
+
+
+
diff --git a/docker-host/setup/tasks/prometheus.yml b/docker-host/setup/tasks/prometheus.yml
new file mode 100644
index 0000000..f7d3dfb
--- /dev/null
+++ b/docker-host/setup/tasks/prometheus.yml
@@ -0,0 +1,63 @@
+--- 
+- hosts: leftcoastlab
+  vars:
+    PROM_URL: "https://github.com/prometheus/node_exporter/releases/download/v1.3.1/node_exporter-1.3.1.linux-amd64.tar.gz"
+  become: yes
+  tasks:
+    - name: Include Global Vars
+      include_vars:
+        dir: ../vars
+
+#    - name: Download prometheus Node Explorer static binary tarball
+#      get_url:
+#        url: "{{ PROM_URL }}"
+#        dest: /tmp/prom-node-exporer.tar.gz
+#
+#    - name: Untar node exporter tarball package
+#      unarchive:
+#        src: /tmp/prom-node-exporer.tar.gz
+#        dest: /opt/prom-node-exporter
+#        creates: /opt/prom-node-exporter
+#        remote_src: yes
+#
+#    - name: Copy Unit file for node exporter
+#      copy:
+#        src: ../files/services/node_exporter.service
+#        dest: /etc/systemd/system/node_exporter.service
+#
+#    - name:  Install Node Exporter Service and Start
+#      systemd:
+#        daemon_reload: yes
+#        name: node_exporter
+#        state: restarted
+#        enabled: yes
+
+    - name: Ensure Prom Docker Volume Exists
+      community.docker.docker_volume:
+        name: prometheus-volume
+
+    - name: Ensure Config directory exists
+      file:
+        path: /opt/prometheus
+        state: directory
+
+    - name: Copy Prometheus template to target directory
+      template:
+        dest: /opt/prometheus/prometheus.yml
+        src: ../templates/prometheus.yml.j2
+
+    - name: Setup Prometheus (Containerized) Service
+      community.docker.docker_container:
+        name: prometheus
+        image: prom/prometheus
+        pull: yes
+        restart_policy: always
+        recreate: yes
+        volumes:
+          - "prometheus-volume:/prometheus"
+          - "/opt/prometheus/prometheus.yml:/etc/prometheus/prometheus.yml"
+        ports:
+          - "{{PROM_PORT}}:{{PROM_PORT}}"
+
+
+
diff --git a/docker-host/setup/templates/prometheus.yml.j2 b/docker-host/setup/templates/prometheus.yml.j2
new file mode 100644
index 0000000..662fd4a
--- /dev/null
+++ b/docker-host/setup/templates/prometheus.yml.j2
@@ -0,0 +1,26 @@
+global:
+  scrape_interval: 15s
+  scrape_timeout: 10s
+  evaluation_interval: 15s
+alerting:
+  alertmanagers:
+  - follow_redirects: true
+    enable_http2: true
+    scheme: http
+    timeout: 10s
+    api_version: v2
+    static_configs:
+    - targets: []
+scrape_configs:
+- job_name: prometheus-scraper
+  honor_timestamps: true
+  scrape_interval: 15s
+  scrape_timeout: 10s
+  metrics_path: /metrics
+  scheme: http
+  follow_redirects: true
+  enable_http2: true
+  static_configs:
+  - targets:
+    - localhost:9090
+    - "{{PRIVATE_IP}}":9100
diff --git a/docker-host/setup/vars/main.yml b/docker-host/setup/vars/main.yml
index b63188d..7f52cad 100644
--- a/docker-host/setup/vars/main.yml
+++ b/docker-host/setup/vars/main.yml
@@ -7,3 +7,4 @@ FILEBROWSER_PORT: 8080
 LOKI_PORT: 3100
 GRAFANA_PORT: 6000
 SUBSONIC_PORT: 4040
+PROM_PORT: 9090