refactor: move Ansible roles to standard ansible/roles/ location

ansible/roles/target/defaults/main.yml

@@ -0,0 +1,3 @@
+---
+node_exporter_version: v1.4.0
+cadvisor_version: v0.46.0

ansible/roles/target/tasks/main.yml

@@ -0,0 +1,29 @@
+---
+- name: Create NodeExporter
+  docker_container:
+      name: node-exporter
+      restart_policy: always
+      image: prom/node-exporter:{{ node_exporter_version }}
+      volumes:
+          - /proc:/host/proc:ro
+          - /sys:/host/sys:ro
+          - /:/rootfs:ro
+      command: >
+          --path.procfs=/host/proc
+          --path.rootfs=/rootfs
+          --path.sysfs=/host/sys
+          --collector.filesystem.mount-points-exclude=^/(sys|proc|dev|host|etc)($$|/)
+      published_ports: "9100:9100"
+
+- name: Create cAdvisor
+  docker_container:
+      name: cadvisor
+      restart_policy: always
+      image: gcr.io/cadvisor/cadvisor:{{ cadvisor_version }}
+      volumes:
+          - /:/rootfs:ro
+          - /var/run:/var/run:ro
+          - /sys:/sys:ro
+          - /var/lib/docker/:/var/lib/docker:ro
+          - /dev/disk/:/dev/disk:ro
+      published_ports: "9101:8080"