Added Divers

Divers/Docker container migration.md

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+# Container migration
+
+### Docker Container Migration
+
+#### On old host (example : Vaultwarden)
+
+```
+docker ps
+docker commit <container_id> vaultwarden
+docker save vaultwarden | gzip > vaultwarden.tar.gz
+scp vaultwarden.tar.gz pleb@<new_host>:/mnt/data/docker/
+```
+
+#### On new host
+
+```
+gunzip -c /mnt/data/docker/vaultwarden/vaultwarden.tar.gz | docker load
+docker run -d --name=vaultwarden vaultwarden/server
+```
+
+# Moving docker containers between hosts
+
+Script : [https://github.com/ricardobranco777/docker-volumes.sh](https://github.com/ricardobranco777/docker-volumes.sh "https://github.com/ricardobranco777/docker-volumes.sh")
+
+##### Usage
+
+```bash
+docker-volumes.sh [-v|--verbose] CONTAINER [save|load] TARBALL
+```
+
+##### Example
+
+```bash
+# Stop the container
+docker stop $CONTAINER
+
+# Create a new image
+docker commit $CONTAINER $CONTAINER
+
+# Save image
+docker save -o $CONTAINER.tar $CONTAINER
+
+# Save the volumes (use ".tar.gz" if you want compression)
+docker-volumes.sh $CONTAINER save $CONTAINER-volumes.tar
+
+# Copy image and volumes to another host
+scp $CONTAINER.tar $CONTAINER-volumes.tar $USER@$HOST:
+
+# On the other host:
+docker load -i $CONTAINER.tar
+docker create --name $CONTAINER [<PREVIOUS CONTAINER OPTIONS>] $CONTAINER
+
+# Load the volumes
+docker-volumes.sh $CONTAINER load $CONTAINER-volumes.tar
+
+# Start container
+docker start $CONTAINER
+```
+
+Script : [https://github.com/ricardobranco777/docker-volumes.sh](https://github.com/ricardobranco777/docker-volumes.sh "https://github.com/ricardobranco777/docker-volumes.sh")
+
+##### Usage
+
+```bash
+docker-volumes.sh [-v|--verbose] CONTAINER [save|load] TARBALL
+```
+
+##### Example
+
+```bash
+# Stop the container
+docker stop $CONTAINER
+
+# Create a new image
+docker commit $CONTAINER $CONTAINER
+
+# Save image
+docker save -o $CONTAINER.tar $CONTAINER
+
+# Save the volumes (use ".tar.gz" if you want compression)
+docker-volumes.sh $CONTAINER save $CONTAINER-volumes.tar
+
+# Copy image and volumes to another host
+scp $CONTAINER.tar $CONTAINER-volumes.tar $USER@$HOST:
+
+# On the other host:
+docker load -i $CONTAINER.tar
+docker create --name $CONTAINER [<PREVIOUS CONTAINER OPTIONS>] $CONTAINER
+
+# Load the volumes
+docker-volumes.sh $CONTAINER load $CONTAINER-volumes.tar
+
+# Start container
+docker start $CONTAINER
+```