Eskuero

I like sysadmin, scripting, manga and football.

  • 63 Posts
  • 263 Comments
Joined 3 years ago
Cake day: June 13th, 2023
  • EskueroAtoSelfhosted@lemmy.world•Do you backup your docker images?English
    3·
    17 days ago

    Yes I do. I cooked a small python script that runs at the end of every daily backup

    import subprocess
import json
import os

# Output directory
OUTPUT_DIR = "/data/dockerimages"
try:
        os.mkdir(OUTPUT_DIR)
except:
        pass

# Grab all the docker images. Each line a json string defining the image
imagenes = subprocess.Popen(["docker", "images", "--format", "json"], stdout = subprocess.PIPE, stderr = subprocess.DEVNULL).communicate()[0].decode().split("\n")

for imagen in imagenes[:-1]:
        datos = json.loads(imagen)
        # ID of the image to save
        imageid = datos["ID"]
        # Compose the output name like this
        # ghcr.io-immich-app-immich-machine-learning:release:2026-01-28:3c42f025fb7c.tar
        outputname = f"{datos["Repository"]}:{datos["Tag"]}:{datos["CreatedAt"].split(" ")[0]}:{imageid}.tar".replace("/", "-")
        # If the file already exists just skip it
        if not os.path.isfile(f"{OUTPUT_DIR}/{outputname}"):
                print(f"Saving {outputname}...")
                subprocess.run(["docker", "save", imageid, "-o", f"{OUTPUT_DIR}/{outputname}"])
        else:
                print(f"Already exists {outputname}")

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