[小技巧] Docker 备份Export和回复Import

Problem & Summary

For images - (静态)

Save

# all
docker save $(docker images -q) -o /path/to/save/mydockersimages.tar
# or some
# IDS=$(docker images | awk '{if ($1 ~ /^(debian|centos)/) print $3}') 
# docker save $IDS -o /path/to/save/somedockersimages.tar

# save tags
docker images | sed '1d' | awk '{print $1 " " $2 " " $3}' > mydockersimages.list

Load

docker load -i /path/to/save/mydockersimages.tar

# then tg
while read REPOSITORY TAG IMAGE_ID
do
        echo "== Tagging $REPOSITORY $TAG $IMAGE_ID =="
        docker tag "$IMAGE_ID" "$REPOSITORY:$TAG"
done < mydockersimages.list

For containers - 动态

• This includes both the image files as well as any changes made while the container was running.

Export

docker export abc123 def456 > my_containers.tar

Import

cat my_containers.tar | docker import - my_image

#!/bin/bash

# List of containers to export
# containers=("webserver" "database" "appserver")

# Get a list of all running containers
containers=$(docker ps -q)


# Export each container
for container in "${containers[@]}"
do
  docker export "$container" > "$container.tar"
done

# Create a new directory for imported containers
mkdir -p imported_containers

# Import each container
for container in "${containers[@]}"
do
  cat "$container.tar" | docker import - "imported_containers/$container"
done