新增部署Prometheus监控工具脚本；更新README.md文件

prometheus/roles/promtail/templates/conf/promtail-config.yaml.j2

@@ -0,0 +1,24 @@
+server:
+  http_listen_port: 9080
+  grpc_listen_port: 0
+
+positions:
+  filename: /tmp/positions.yaml
+
+clients:
+  - url: http://{{ groups.server.0 }}:{{ loki.port }}/loki/api/v1/push
+
+scrape_configs: 
+{% for node in promtail.nodes -%} 
+{% if node.host == inventory_hostname -%} 
+{% for target in node.targets -%} 
+- job_name: {{ target.name }} 
+  static_configs: 
+  - targets: 
+      - localhost 
+    labels: 
+      job: {{ target.name }} 
+      __path__: {{ target.path }}/*log 
+{% endfor %} 
+{% endif %} 
+{% endfor %} 

prometheus/roles/promtail/templates/docker-compose.yml.j2

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+version: "3.9"
+
+services:
+  promtail:
+    image: {{ promtail.image }}
+    container_name: {{ docker.network.name }}-promtail
+    hostname: promtail
+    restart: always 
+    networks: 
+      - {{ docker.network.name }} 
+    {% for node in promtail.nodes -%} 
+    {% if node.host == inventory_hostname -%} 
+    ports: 
+      - {{ node.port }}:9080 
+    volumes: 
+      - {{ promtail.dir.conf }}/promtail-config.yaml:/etc/promtail/promtail-config.yaml 
+      {% for target in node.targets -%} 
+      - {{ target.path }}:{{ target.path }} 
+      {% endfor %} 
+    {% endif %} 
+    {% endfor %} 
+    command: "-config.file=/etc/promtail/promtail-config.yaml"
+
+networks:
+  {{ docker.network.name }}:
+    external: true
+    name: {{ docker.network.name }}