Davrot@uni-bremen.de: Created page with "Example for nginx. You need to adapt: SERVICE_NAME="nginx" CONTAINER_NAME="nginx" IMAGE_NAME="nginx:stable-alpine" YAML_DIRECTORY_NAME="/docker/compose/" #!/bin/bash set -euo pipefail SERVICE_NAME="nginx" CONTAINER_NAME="nginx" IMAGE_NAME="nginx:stable-alpine" YAML_DIRECTORY_NAME="/docker/compose/" # Get current image ID (short format) CURRENT_IMAGE=$(docker inspect --format='{{.Image}}' "${C..."

2026-07-22T16:02:04Z

Created page with "Example for nginx. You need to adapt:<syntaxhighlight lang="bash"> SERVICE_NAME="nginx" CONTAINER_NAME="nginx" IMAGE_NAME="nginx:stable-alpine" YAML_DIRECTORY_NAME="/docker/compose/" </syntaxhighlight><syntaxhighlight lang="bash">#!/bin/bash set -euo pipefail SERVICE_NAME="nginx" CONTAINER_NAME="nginx" IMAGE_NAME="nginx:stable-alpine" YAML_DIRECTORY_NAME="/docker/compose/" # Get current image ID (short format) CURRENT_IMAGE=$(docker inspect --format='{{.Image}}' "${C..."

New page

Example for nginx.

You need to adapt:<syntaxhighlight lang="bash">
SERVICE_NAME="nginx"
CONTAINER_NAME="nginx"
IMAGE_NAME="nginx:stable-alpine"
YAML_DIRECTORY_NAME="/docker/compose/"
</syntaxhighlight><syntaxhighlight lang="bash">#!/bin/bash
set -euo pipefail

SERVICE_NAME="nginx"
CONTAINER_NAME="nginx"
IMAGE_NAME="nginx:stable-alpine"
YAML_DIRECTORY_NAME="/docker/compose/"

# Get current image ID (short format)
CURRENT_IMAGE=$(docker inspect --format='{{.Image}}' "${CONTAINER_NAME}" 2>/dev/null | cut -d: -f2 | cut -c1-12) || true

# Pull the latest image
echo "Pulling latest image..."
docker pull "${IMAGE_NAME}"

# Get new image ID (short format)
NEW_IMAGE=$(docker images "${IMAGE_NAME}" --format '{{.ID}}')

echo "Current image: $CURRENT_IMAGE"
echo "Latest image: $NEW_IMAGE"

# Compare and restart only if different
if [ -z "$CURRENT_IMAGE" ]; then
echo "Container not found, starting it up..."
cd "${YAML_DIRECTORY_NAME}"
docker compose up -d "${SERVICE_NAME}"
elif [ "$CURRENT_IMAGE" != "$NEW_IMAGE" ]; then
echo "New image detected, restarting container..."
cd "${YAML_DIRECTORY_NAME}"
docker compose down "${SERVICE_NAME}"
docker compose up -d "${SERVICE_NAME}"
echo "Update completed!"
else
echo "Already running the latest version, no restart needed."
fi</syntaxhighlight>Make the script executable (chmod 07.... ).

Add it to cron (crontab -e ) with the correct path and script name:<syntaxhighlight lang="bash">
0 4 * * * /docker/compose/autoupdate_nginx.sh >> /var/log/nginx-update.log 2>&1
</syntaxhighlight>

Autoupdate Script Docker Container - Revision history