Status

'All' Compose File

The Scenario

We want to push a standard compose file to all machines, which enables some standardization across the board.

We're wanting to standardize;

  • Automatic updates for specific containers

  • Server monitoring

  • Server security

Requirements

  • NetData cloud account (free)

  • Docker installed on all servers

  • A way to push the Compose file to each server (I recommend Portainer Edge Stacks)

Recommendations

Please note that WatchTower is NOT a supported method for updating docker containers and automatic updates can cause issues. Please ensure you have backups of your data in case you need to roll back. I would recommend following my https://github.com/trentnbauer/agg-docs/blob/main/guides/mini-guides/broken-reference/README.md documentation as this includes a much safer solution for updating containers.

Ignoring that, I am using WatchTower to update Portainer in my environment as I am unable to update it without doing it via the CLI. In general, this is the only time I would suggest this as a solution

Solution

We're going to create a Docker Compose file to be installed on all machines (this expects Ubuntu, but may work on other Linux distros)

This compose file will container

  • NetData (server monitoring and alerts)

  • Fail2Ban (security for SSH)

  • WatchTower

    • 1 instance for daily updates

    • 1 instance for weekly updates

Any container that requires updating will need the relevant WatchTower label added to enable updates

Watchtower Tags

Please ensure that your container version is 'latest' to enable auto-updates. Enabling a version tag (eg v1.1.1) will not allow for auto updates. eg netdata:latest

Docker Compose

Add the below to the compose file, at bottom of each container you wish to update. Ensure that the 'labels:' line is at the same spot as image, ports, volumes etc.

Compose, daily
    labels:
      - com.centurylinklabs.watchtower.scope=daily
Compose, weekly
    labels:
      - com.centurylinklabs.watchtower.scope=weekly

CLI

Add the below line to the end of your docker run command

CLI, daily
 --label=com.centurylinklabs.watchtower.scope=daily
CLI, weekly
 --label=com.centurylinklabs.watchtower.scope=weekly

Portainer

  1. Edit your container and scroll down to advanced settings

  2. Select Labels

  3. Click 'Add label'

  4. Add one of the below\

    Name
    Value

    com.centurylinklabs.watchtower.label

    daily

    com.centurylinklabs.watchtower.label

    weekly

Compose File

Don't copy paste the file, there are some entries you need to fill

docker-compose.yml
version: '3'
services:
  netdata:
    image: ghcr.io/netdata/netdata:latest
    ports:
      - 19999:19999
    restart: unless-stopped
    cap_add:
      - SYS_PTRACE
    security_opt:
      - apparmor:unconfined
    volumes:
      - netdataconfig:/etc/netdata
      - netdatalib:/var/lib/netdata
      - netdatacache:/var/cache/netdata
      - /etc/passwd:/host/etc/passwd:ro
      - /etc/group:/host/etc/group:ro
      - /proc:/host/proc:ro
      - /sys:/host/sys:ro
      - /etc/os-release:/host/etc/os-release:ro
      - /var/run/docker.sock:/var/run/docker.sock:ro
      - /etc/hostname:/etc/hostname:ro
    environment:
      - NETDATA_CLAIM_TOKEN= #PROVIDE YOUR TOKEN
      - NETDATA_CLAIM_URL=https://app.netdata.cloud
      - NETDATA_CLAIM_ROOMS=
      - CONTAIMNERS=1
    labels:
      - com.centurylinklabs.watchtower.scope=daily


  fail2ban:
    image: ghcr.io/crazy-max/fail2ban:latest
    network_mode: "host"
    cap_add:
      - NET_ADMIN
      - NET_RAW
    volumes:
      - fail2ban:/data
      - /var/log:/var/log:ro
    environment:
      - TZ= #TZ
      - F2B_LOG_TARGET=STDOUT
      - F2B_LOG_LEVEL=INFO
      - F2B_DB_PURGE_AGE=1d
      - SSMTP_HOST=smtp.gmail.com
      - SSMTP_PORT=587
      - SSMTP_HOSTNAME=gmail.com
      - SSMTP_USER= #GMAIL USERNAME
      - SSMTP_PASSWORD= #GMAIL PASSWORD
      - SSMTP_TLS=YES
    restart: always
    labels:
      - com.centurylinklabs.watchtower.scope=daily


  watchtower-daily:
    image: ghcr.io/containrrr/watchtower:latest
    restart: always
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
    environment:
      - TZ= #TZ
      - WATCHTOWER_ROLLING_RESTART=true
      - WATCHTOWER_CLEANUP=true
      - WATCHTOWER_INCLUDE_STOPPED=true
      - WATCHTOWER_POLL_INTERVAL=86400 #1 day in seconds
    labels:
      - com.centurylinklabs.watchtower.scope=weekly
    command: --scope daily


  watchtower-weekly:
    image: ghcr.io/containrrr/watchtower:latest
    restart: always
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
    environment:
      - TZ=Australia/Melbourne
      - WATCHTOWER_ROLLING_RESTART=true
      - WATCHTOWER_CLEANUP=true
      - WATCHTOWER_INCLUDE_STOPPED=true
      - WATCHTOWER_POLL_INTERVAL=604800 #7 days in seconds
    labels:
      - com.centurylinklabs.watchtower.scope=daily
    command: --scope weekly

      
volumes:
  netdataconfig:
  netdatalib:
  netdatacache:
  fail2ban:
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