Update does not happen on Docker Container re-deployment

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1

Expected Behaviour:

On the bottom of the admin page "update available" is blinking red and below the suggestion "to install updates, replace this old container with a fresh updated image". Via Portainer-CE I re-deploy the Container by forcing it to pull it again from pihole/pihole:latest but it won't update.

  • Debian Linux Trixie

  • HP EliteDesk i5-8500T 16GB RAM

  • Docker compose file:

    pihole:
    container_name: pihole
    image: pihole/pihole:latest
    restart: unless-stopped
    network_mode: host
    depends_on:
      unbound:
        condition: service_healthy

    environment:
      TZ: "Europe/Zurich"
      FTLCONF_webserver_api_password: "${PIHOLE_PASSWORD}"
      FTLCONF_dns_upstreams: "172.31.0.3#5335;172.31.0.3#5335"
      FTLCONF_dns_dnssec: "true"
      FTLCONF_dns_bogusPriv: "true"
      FTLCONF_dns_listeningMode: "all"
      FTLCONF_webserver_port: "8080"
      FTLCONF_ntp_ipv4_active: "false"
      FTLCONF_ntp_ipv6_active: "false"

    volumes:
      - /opt/pihole/etc-pihole:/etc/pihole
      - /mnt/nas/docker/pihole/etc-dnsmasq.d:/etc/dnsmasq.d

    cap_add:
      - NET_ADMIN

  • Docker engine version 29.6.0

Actual Behaviour:

The Container is not being updated (from the actual 2026.05.0 to the new 2026.06.0)

Debug Token:

https://tricorder.pi-hole.net/NJ6Ofa5n/

2

You are pulling an image, not a container.
Redeploying a container will reuse the already deployed container, which in your case was created from a previous image.
You need to replace the existing container based on 2026.05.0 and deploy a new one based on 2026.06.00.

The necessary steps for plain Docker or docker-compose are described in Docker ยป Upgrading, e.g.

docker pull pihole/pihole:latest
docker stop pihole
docker rm pihole
docker run [ ... your arguments here ... ]

You need to perform the equivalent actions with Portainer.

3

This is not a Pi-hole issue.

For some reason, Portainer won't download the new image automatically if you simply stop and restart the stack.

While writing this reply, I just updated one of my instances (which I had forgotten to update last week), using Portainer and it only updates the image if you execute these steps:

  1. stop the stack
  2. go to the "Images" menu and delete the old pihole/pihole:latest image
  3. restart the stack.
7

Somehow this worked today but did not work a couple of days ago - and I did exactly the same: in Portainer CE I simply re-deployed it by forcing the download of the image.

Anyway: THANKS