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# Prometheus+Grafana in docker
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###### guide by example
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## Purpose
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Monitoring of the host and the running cointaners.
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* [Official site](https://prometheus.io/)
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* [Github](https://github.com/prometheus)
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* [DockerHub](https://hub.docker.com/r/prom/prometheus/)
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Everything here is based on an excelent
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[stefanprodan/dockprom](https://github.com/stefanprodan/dockprom)
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## The containers
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* Prometheus - monitoring system and the metrics database
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* Grafana - web based ui visualisation of the metrics
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* NodeExporter - hosts metrics collector
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* cAdvisor - docker containers metrics collector
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## Files and directory structure
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```
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/home
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└── ~
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└── docker
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└── prometheus
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│
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├── 🗁 grafana
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│ └── 🗁 provisioning
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│ ├── 🗁 dashboards
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│ │ ├── 🗋 dashboard.yml
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│ │ ├── 🗋 docker_host.json
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│ │ ├── 🗋 docker_containers.json
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│ │ └── 🗋 monitor_services.json
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│ │
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│ └── 🗁 datasources
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│ └── 🗋 datasource.yml
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│
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├── 🗁 grafana-data
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├── 🗁 prometheus-data
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│
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├── 🗋 .env
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├── 🗋 docker-compose.yml
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└── 🗋 prometheus.yml
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```
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## docker-compose
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`docker-compose.yml`
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```yml
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version: '3'
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services:
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# MONITORING SYSTEM AND THE METRICS DATABASE
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prometheus:
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image: prom/prometheus
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container_name: prometheus
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hostname: prometheus
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restart: unless-stopped
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user: root
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depends_on:
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- cadvisor
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command:
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- '--config.file=/etc/prometheus/prometheus.yml'
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- '--storage.tsdb.path=/prometheus'
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- '--storage.tsdb.retention.time=200h'
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- '--web.console.libraries=/etc/prometheus/console_libraries'
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- '--web.console.templates=/etc/prometheus/consoles'
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- '--web.enable-lifecycle'
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volumes:
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- ./prometheus.yml:/etc/prometheus/prometheus.yml
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- ./prometheus_data:/prometheus
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labels:
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org.label-schema.group: "monitoring"
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# WEB BASED UI VISUALISATION OF THE METRICS
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grafana:
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image: grafana/grafana
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container_name: grafana
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hostname: grafana
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restart: unless-stopped
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user: root
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environment:
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- GF_SECURITY_ADMIN_USER
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- GF_SECURITY_ADMIN_PASSWORD
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- GF_USERS_ALLOW_SIGN_UP
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volumes:
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- ./grafana_data:/var/lib/grafana
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- ./grafana/provisioning:/etc/grafana/provisioning
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labels:
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org.label-schema.group: "monitoring"
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# HOSTS METRICS COLLECTOR
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nodeexporter:
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image: prom/node-exporter
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container_name: nodeexporter
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hostname: nodeexporter
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restart: unless-stopped
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command:
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- '--path.procfs=/host/proc'
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- '--path.rootfs=/rootfs'
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- '--path.sysfs=/host/sys'
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- '--collector.filesystem.ignored-mount-points=^/(sys|proc|dev|host|etc)($$|/)'
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volumes:
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- /proc:/host/proc:ro
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- /sys:/host/sys:ro
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- /:/rootfs:ro
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labels:
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org.label-schema.group: "monitoring"
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# DOCKER CONTAINERS METRICS COLLECTOR
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cadvisor:
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image: google/cadvisor
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container_name: cadvisor
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hostname: cadvisor
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restart: unless-stopped
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volumes:
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- /:/rootfs:ro
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- /var/run:/var/run:rw
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- /sys:/sys:ro
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- /var/lib/docker:/var/lib/docker:ro
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- /cgroup:/cgroup:ro
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labels:
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org.label-schema.group: "monitoring"
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networks:
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default:
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external:
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name: $DEFAULT_NETWORK
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```
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`.env`
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```bash
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# GENERAL
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MY_DOMAIN=blabla.org
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DEFAULT_NETWORK=caddy_net
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TZ=Europe/Prague
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# GRAFANA
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GF_SECURITY_ADMIN_USER=admin
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GF_SECURITY_ADMIN_PASSWORD=admin
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GF_USERS_ALLOW_SIGN_UP=false
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```
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**All containers must be on the same network**.</br>
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If one does not exist yet: `docker network create caddy_net`
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## Other files
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**prometheus.yml** - config for prometheus, bind mounted in to prometheus container.
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This one contains the bare minimum setup of metric endpoints to be scarepd for data.
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`prometheus.yml`
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```yml
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global:
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scrape_interval: 15s
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evaluation_interval: 15s
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# A scrape configuration containing exactly one endpoint to scrape.
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scrape_configs:
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- job_name: 'nodeexporter'
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scrape_interval: 5s
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static_configs:
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- targets: ['nodeexporter:9100']
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- job_name: 'cadvisor'
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scrape_interval: 5s
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static_configs:
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- targets: ['cadvisor:8080']
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- job_name: 'prometheus'
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scrape_interval: 10s
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static_configs:
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- targets: ['localhost:9090']
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```
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**The entire /grafana/provisioning directory is bind mounted in to grafana container**
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/grafana/provisioning/datasources/**datasource.yml** - grafana's datasource config file
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if one would not exist then during the first run it would ask for this info.
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`datasource.yml`
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```yml
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apiVersion: 1
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datasources:
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- name: Prometheus
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type: prometheus
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access: proxy
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orgId: 1
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url: http://prometheus:9090
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basicAuth: false
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isDefault: true
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editable: true
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```
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* grafana/provisioning/dashboards/**dashboard.yml** - not sure
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`dashboard.yml`
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```yml
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apiVersion: 1
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providers:
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- name: 'Prometheus'
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orgId: 1
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folder: ''
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type: file
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disableDeletion: false
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editable: true
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allowUiUpdates: true
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options:
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path: /etc/grafana/provisioning/dashboards
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```
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* grafana/provisioning/dashboards/**<dashboards.json files>** - pre configured dashboards
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Premade Dashboards are in the `dashboards` of this tutorial.
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## Reverse proxy
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Caddy v2 is used,
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details [here](https://github.com/DoTheEvo/Caddy-v2-examples)
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`Caddyfile`
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```
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grafana.{$MY_DOMAIN} {
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reverse_proxy grafana:3000
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}
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```
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## Explanation
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asdasd
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---
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## Update
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* [watchtower](https://github.com/DoTheEvo/selfhosted-apps-docker/tree/master/watchtower) updates the image automaticly
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* manual image update</br>
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`docker-compose pull`</br>
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`docker-compose up -d`</br>
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`docker image prune`
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## Backup and restore
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* **backup** using [borgbackup setup](https://github.com/DoTheEvo/selfhosted-apps-docker/tree/master/borg_backup)
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that makes daily snapshot of the entire directory
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* **restore**</br>
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down the bookstack containers `docker-compose down`</br>
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delete the entire bookstack directory</br>
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from the backup copy back the bookstack directortory</br>
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start the container `docker-compose up -d`
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## Backup of just user data
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## Restore the user data
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