Introduction

I’m using Diun to be notified about outdated Docker container. Today I was notified about an outstanding update for acme.sh. I’m using acme in various variants but this container was running on my Synology, outside the management provided by Dockge, so I had to update the container manually.

Update procedure

Login to your Host via SSH and become root. Update to the latest image by using docker pull neilpang/acme.sh. Here’s an example call from my machine:

ash-4.4# docker pull neilpang/acme.sh
Using default tag: latest
latest: Pulling from neilpang/acme.sh
f18232174bc9: Already exists
a02477d504ae: Pull complete
cdbb199096b6: Pull complete
e84b361f958b: Pull complete
d2ab1c727d8c: Pull complete
b17b2bc9b3ea: Pull complete
ec66d11b3eb8: Pull complete
166c8dec79a1: Pull complete
99b492c2aef4: Pull complete
6a45f468ca50: Pull complete
Digest: sha256:1900e9b22a4859c6e1da3bb8184d5a129d63537502f9f9053b807dc2939c1e23
Status: Downloaded newer image for neilpang/acme.sh:latest
docker.io/neilpang/acme.sh:latest

Now you’ll have to recreate the currently running container. You can check if your container is running by using docker ps|grep acme. Again an example output:

ash-4.4# docker ps|grep acme
1144de4611aa   187c1f47ec28                                   "/entry.sh daemon"       15 months ago    Up 2 weeks                                                            acme

For the recreation you’ll need to know how you’ll originally started your container. I did this manually when I setup acme for the first time using these instructions. My only custom modification was that I’m referencing a volume to keep my certificates.

You can now either stop, remove and recreate the container or stop, remove and recreate it in a docker-compose file. I’ve chosen the latter variant to spare me from future manual updates. My docker-compose.yml looks like this:

services:
  acme:
    image: neilpang/acme.sh:latest
    container_name: acme
    restart: unless-stopped
    command: daemon
    volumes:
      - /volume1/docker/acme:/acme.sh
networks: {}

Now I can just hit update in Dockge and I’m getting my container updated.

Conclusion

I have no idea why I did not move acme to a docker-compose file earlier. Updating it this way is way more comfortable. But the best thing about this update is probably that I’ve did migrate my setup to Dockge.