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Shorted monitor-bot- to mon-bot-
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25
roles/mon-bot-docker-volumes/README.md
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roles/mon-bot-docker-volumes/README.md
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# Health Check for Docker Volumes
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## Description
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This role checks for anonymous Docker volumes that are not bound to a container and may be left over from previous operations. It provides a cleanup mechanism by identifying such volumes, excluding any that are whitelisted, and possibly taking action against them.
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## Files
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- `vars/main.yml`: Variable definitions for the script's directory and whitelist.
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- `handlers/main.yml`: Handlers to reload and restart the systemd service and timer.
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- `files/mon-bot-docker-volumes.sh`: The script that checks for anonymous Docker volumes and excludes whitelisted volumes.
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- `tasks/main.yml`: Tasks to create necessary directories, copy scripts, and create systemd service and timer.
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- `templates/mon-bot-docker-volumes.cymais.service.j2`: Systemd service template, including the whitelisted volumes as a parameter.
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- `templates/mon-bot-docker-volumes.cymais.timer.j2`: Systemd timer template.
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- `meta/main.yml`: Meta information declaring dependencies for the role.
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## Usage
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Include this role in your playbook and set the `path_administrator_scripts` variable to determine where the health check scripts should reside. Define `whitelisted_anonymous_volumes` in `vars/main.yml` with an array of volume IDs that should be ignored by the health check.
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Ensure that the `alert-compose` dependency is satisfied for error notifications.
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## Created with AI
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This script was created with the help of AI. The full conversation you find [here](https://chat.openai.com/share/1fa829f1-f001-4111-b1d4-1b2e3d583da2).
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51
roles/mon-bot-docker-volumes/files/mon-bot-docker-volumes.sh
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roles/mon-bot-docker-volumes/files/mon-bot-docker-volumes.sh
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#!/bin/bash
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status=0
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# The first argument is a space-separated list of whitelisted volume IDs
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whitelist=$1
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whitelisted_volumes=($whitelist) # Split into an array
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anonymous_volumes=$(docker volume ls --format "{{.Name}}" | grep -E '^[a-f0-9]{64}$')
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if [ -z "$anonymous_volumes" ]; then
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echo "No anonymous volumes found."
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exit
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fi
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echo "Anonymous volumes found:"
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for volume in $anonymous_volumes; do
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# Check if the volume is in the whitelist
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if printf '%s\n' "${whitelisted_volumes[@]}" | grep -q "^$volume$"; then
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echo "Volume $volume is whitelisted and will be skipped."
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continue
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fi
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container_mount_path=$(docker ps -q | xargs -I {} docker inspect {} --format="{{range .Mounts}}{{if eq .Name \"$volume\"}}{{.Destination}}{{end}}{{end}}" | tr -d '\n' | xargs)
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if [ "$container_mount_path" == "/var/www/bootstrap" ]; then
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echo "Volume $volume is a bootstrap volume and will be skipped."
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continue
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fi
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((status++))
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container_ids=$(docker ps -aq --filter volume=$volume)
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if [ -z "$container_ids" ]; then
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echo "Volume $volume is not used by any running containers."
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continue
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fi
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for container_id in $container_ids; do
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container_name=$(docker inspect --format '{{ .Name }}' $container_id | sed 's#^/##')
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mount_path=$(docker inspect --format "{{ range .Mounts }}{{ if eq .Name \"$volume\" }}{{ .Destination }}{{ end }}{{ end }}" $container_id)
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if [ -n "$mount_path" ]; then
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echo "Volume $volume is used by container $container_name at mount path $mount_path"
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else
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echo "Volume $volume is used by container $container_name, but mount path could not be determined."
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fi
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done
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done
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exit $status
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5
roles/mon-bot-docker-volumes/handlers/main.yml
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roles/mon-bot-docker-volumes/handlers/main.yml
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- name: "reload mon-bot-docker-volumes.cymais.service"
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systemd:
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name: mon-bot-docker-volumes.cymais.service
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enabled: yes
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daemon_reload: yes
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roles/mon-bot-docker-volumes/meta/main.yml
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roles/mon-bot-docker-volumes/meta/main.yml
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---
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galaxy_info:
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author: "Kevin Veen-Birkenbach"
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description: "Detects anonymous Docker volumes not bound to containers (unless whitelisted) and alerts."
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company: |
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Kevin Veen-Birkenbach
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Consulting & Coaching Solutions
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https://www.veen.world
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license: "CyMaIS NonCommercial License (CNCL)"
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license_url: "https://s.veen.world/cncl"
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min_ansible_version: "2.9"
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platforms:
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- name: Archlinux
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versions: ["rolling"]
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galaxy_tags:
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- monitor
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- docker
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- volumes
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- health
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- systemd
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repository: "https://s.veen.world/cymais"
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documentation: "https://s.veen.world/cymais"
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dependencies:
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- alert-compose
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roles/mon-bot-docker-volumes/tasks/main.yml
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roles/mon-bot-docker-volumes/tasks/main.yml
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- name: "create {{health_docker_volumes_folder}}"
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file:
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path: "{{health_docker_volumes_folder}}"
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state: directory
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mode: 0755
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when: run_once_health_docker_volumes is not defined
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- name: create mon-bot-docker-volumes.sh
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copy:
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src: mon-bot-docker-volumes.sh
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dest: "{{health_docker_volumes_folder}}mon-bot-docker-volumes.sh"
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when: run_once_health_docker_volumes is not defined
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- name: create mon-bot-docker-volumes.cymais.service
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template:
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src: mon-bot-docker-volumes.service.j2
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dest: /etc/systemd/system/mon-bot-docker-volumes.cymais.service
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notify: reload mon-bot-docker-volumes.cymais.service
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when: run_once_health_docker_volumes is not defined
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- name: set service_name to the name of the current role
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set_fact:
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service_name: "{{ role_name }}"
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when: run_once_health_docker_volumes is not defined
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- name: "include role for generic-timer for {{service_name}}"
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include_role:
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name: generic-timer
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vars:
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on_calendar: "{{on_calendar_health_docker_volumes}}"
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when: run_once_health_docker_volumes is not defined
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- name: run the health_docker_volumes tasks once
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set_fact:
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run_once_health_docker_volumes: true
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when: run_once_health_docker_volumes is not defined
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[Unit]
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Description=Checking docker health
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OnFailure=alert-compose.cymais@%n.service
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[Service]
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Type=oneshot
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ExecStart=/bin/bash {{ health_docker_volumes_folder }}mon-bot-docker-volumes.sh "{{ whitelisted_anonymous_docker_volumes | join(' ') }}"
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1
roles/mon-bot-docker-volumes/vars/main.yml
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1
roles/mon-bot-docker-volumes/vars/main.yml
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health_docker_volumes_folder: "{{path_administrator_scripts}}mon-bot-docker-volumes/"
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