Skip to content

Instantly share code, notes, and snippets.

@marcelrv

marcelrv/_docker-migrate-aufs.md

Last active September 2, 2024 13:23
Show Gist options
  • Save marcelrv/e7dac93863945dccc46f70915c84b5db to your computer and use it in GitHub Desktop.
Save marcelrv/e7dac93863945dccc46f70915c84b5db to your computer and use it in GitHub Desktop.
Download ZIP

Revisions

  1. marcelrv revised this gist Jan 28, 2022. 1 changed file with 1 addition and 2 deletions.
    3 changes: 1 addition & 2 deletions _docker-migrate-aufs.md
    View file
    Original file line number Diff line number Diff line change
    @@ -9,7 +9,7 @@ The only way I found that is somewhat automated is the the docker-compose way..

    Which is still not 100% and require manual fixing of stupid errors of the docker-compose tool (mainly things that ere not interpreted right, like dates & userIds that need to manually surrounded by quotes etc)

    Also I needed to add `network_mode: bridge` to the configs as I did not want a network definition for each container which seems to be the docker-compose default way
    Also I needed to add `network_mode: bridge` or `network_mode: host` to the configs as I did not want a network definition for each container which seems to be the docker-compose default way

    ## Backup the whole crap before doing heart surgery
    ```
    @@ -89,4 +89,3 @@ docker container stop `docker container ls -aq`
    docker container rm `docker container ls -aq`
    ```


  2. marcelrv renamed this gist Oct 5, 2021. 1 changed file with 0 additions and 0 deletions.
    0 docker-migrate-aufs.md → _docker-migrate-aufs.md
    View file
    File renamed without changes.
  3. marcelrv renamed this gist Oct 5, 2021. 1 changed file with 0 additions and 0 deletions.
    0 docker-migrate.md → docker-migrate-aufs.md
    View file
    File renamed without changes.
  4. marcelrv revised this gist Oct 5, 2021. No changes.
  5. marcelrv revised this gist Oct 5, 2021. 1 changed file with 1 addition and 1 deletion.
    2 changes: 1 addition & 1 deletion docker-migrate.md
    View file
    Original file line number Diff line number Diff line change
    @@ -36,7 +36,7 @@ for c in $CIDS; do mkdir ~/dockercontainers/$c ; ~/autocompose.py $c > dockercon
    # check if there are no errors in the created files
    for c in $CIDS; do cd ~/dockercontainers/$c ; echo ======== $c ======= ;docker-compose config ; done
    #Fix possible errors...
    #Fix possible errors... e.g. adding quotes around strings docker-compose does not swallow (e.g. dates)
    ```

  6. marcelrv revised this gist Oct 5, 2021. 1 changed file with 160 additions and 0 deletions.
    160 changes: 160 additions & 0 deletions autocompose.py
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,160 @@
    #! /usr/bin/env python

    # Copy of https://github.com/Red5d/docker-autocompose dirty hacked with some fixes for dates and
    # possiblity to create docker command lines from the existing containers by using the -o2 parameter

    import sys, argparse, pyaml, docker
    from collections import OrderedDict

    def main():
    parser = argparse.ArgumentParser(description='Generate docker-compose yaml definition from running container.')
    parser.add_argument('-v', '--version', type=int, default=3, help='Compose file version (1 or 3)')
    parser.add_argument('-o', '--output', type=int, default=0, help='Type of output (0 or 1,2)')
    parser.add_argument('cnames', nargs='*', type=str, help='The name of the container to process.')
    args = parser.parse_args()

    struct = {}
    networks = []
    for cname in args.cnames:
    cfile, networks,cmdline = generate(cname)
    struct.update(cfile)

    if args.output >0:
    print ("\r\n"+ cmdline + "\r\n")
    if args.output <2:
    render(struct, args, networks)


    def render(struct, args, networks):
    # Render yaml file
    if args.version == 1:
    pyaml.p(OrderedDict(struct))
    else:
    pyaml.p(OrderedDict({'version': '"3"', 'services': struct, 'networks': networks}))

    def generate(cname):
    c = docker.from_env()

    try:
    cid = [x.short_id for x in c.containers.list(all=True) if cname == x.name or x.short_id in cname][0]
    except IndexError:
    print("That container is not available.")
    sys.exit(1)

    cattrs = c.containers.get(cid).attrs


    # Build yaml dict structure

    cfile = {}
    cfile[cattrs['Name'][1:]] = {}
    ct = cfile[cattrs['Name'][1:]]
    cmdLine ="docker run --name " + str( cattrs['Name'][1:])

    values = {
    'cap_add': cattrs['HostConfig']['CapAdd'],
    'cap_drop': cattrs['HostConfig']['CapDrop'],
    'cgroup_parent': cattrs['HostConfig']['CgroupParent'],
    'container_name': cattrs['Name'][1:],
    'devices': [],
    'dns': cattrs['HostConfig']['Dns'],
    'dns_search': cattrs['HostConfig']['DnsSearch'],
    'environment': cattrs['Config']['Env'],
    'extra_hosts': cattrs['HostConfig']['ExtraHosts'],
    'image': cattrs['Config']['Image'],
    'labels': cattrs['Config']['Labels'],
    'links': cattrs['HostConfig']['Links'],
    #'log_driver': cattrs['HostConfig']['LogConfig']['Type'],
    #'log_opt': cattrs['HostConfig']['LogConfig']['Config'],
    #'logging': {'driver': cattrs['HostConfig']['LogConfig']['Type'], 'options': cattrs['HostConfig']['LogConfig']['Config']},
    'networks': {x for x in cattrs['NetworkSettings']['Networks'].keys() if x != 'bridge'},
    'security_opt': cattrs['HostConfig']['SecurityOpt'],
    'ulimits': cattrs['HostConfig']['Ulimits'],
    'volumes': cattrs['HostConfig']['Binds'],
    'volume_driver': cattrs['HostConfig']['VolumeDriver'],
    'volumes_from': cattrs['HostConfig']['VolumesFrom'],
    'entrypoint': cattrs['Config']['Entrypoint'],
    'user': cattrs['Config']['User'],
    'working_dir': cattrs['Config']['WorkingDir'],
    'domainname': cattrs['Config']['Domainname'],
    'hostname': cattrs['Config']['Hostname'],
    'ipc': cattrs['HostConfig']['IpcMode'],
    'mac_address': cattrs['NetworkSettings']['MacAddress'],
    'privileged': cattrs['HostConfig']['Privileged'],
    'restart': cattrs['HostConfig']['RestartPolicy']['Name'],
    'read_only': cattrs['HostConfig']['ReadonlyRootfs'],
    'stdin_open': cattrs['Config']['OpenStdin'],
    'tty': cattrs['Config']['Tty']
    }

    # Populate devices key if device values are present
    if cattrs['HostConfig']['Devices']:
    values['devices'] = [x['PathOnHost']+':'+x['PathInContainer'] for x in cattrs['HostConfig']['Devices']]

    networks = {}
    if values['networks'] == set():
    del values['networks']
    values['network_mode'] = 'bridge'
    else:
    networklist = c.networks.list()
    for network in networklist:
    if network.attrs['Name'] in values['networks']:
    networks[network.attrs['Name']] = {'external': (not network.attrs['Internal'])}

    # Check for command and add it if present.
    if cattrs['Config']['Cmd'] != None:
    values['command'] = " ".join(cattrs['Config']['Cmd']),

    # Check for exposed/bound ports and add them if needed.
    try:
    expose_value = list(cattrs['Config']['ExposedPorts'].keys())
    ports_value = [cattrs['HostConfig']['PortBindings'][key][0]['HostIp']+':'+cattrs['HostConfig']['PortBindings'][key][0]['HostPort']+':'+key for key in cattrs['HostConfig']['PortBindings']]

    # If bound ports found, don't use the 'expose' value.
    if (ports_value != None) and (ports_value != "") and (ports_value != []) and (ports_value != 'null') and (ports_value != {}) and (ports_value != "default") and (ports_value != 0) and (ports_value !=$
    for index, port in enumerate(ports_value):
    if port[0] == ':':
    ports_value[index] = port[1:]
    # print ( "-p " , str (ports_value[index]))
    cmdLine = cmdLine + " -p " + str (ports_value[index])
    values['ports'] = ports_value
    else:
    values['expose'] = expose_value

    except (KeyError, TypeError):
    # No ports exposed/bound. Continue without them.
    ports = None

    # fix some dates from causing errors.
    try:
    if values['labels']['org.label-schema.build-date'] != None:
    d = values['labels']['org.label-schema.build-date']
    values['labels']['org.label-schema.build-date'] = "'" + str( d ) + "'"
    except KeyError as ke:
    pass

    # Iterate through values to finish building yaml dict.
    for key in values:
    value = values[key]
    if (value != None) and (value != "") and (value != []) and (value != 'null') and (value != {}) and (value != "default") and (value != 0) and (value != ",") and (value != "no"):
    ct[key] = value

    if cattrs['HostConfig']['Binds']:
    for key in cattrs['HostConfig']['Binds']:
    cmdLine = cmdLine + ' -v ' + str(key)

    if cattrs['Config']['Env']:
    for key in values['environment']:
    cmdLine = cmdLine + ' -e ' + str(key.split('=')[0])
    if len(key.split('='))>1:
    cmdLine = cmdLine + '="' + str(key.split('=')[1]) + '"'
    cmdLine = cmdLine + " " + str ( cattrs['Config']['Image'])
    return cfile, networks, cmdLine


    if __name__ == "__main__":
    main()




  7. marcelrv revised this gist Oct 5, 2021. 1 changed file with 1 addition and 0 deletions.
    1 change: 1 addition & 0 deletions docker-migrate.md
    View file
    Original file line number Diff line number Diff line change
    @@ -60,6 +60,7 @@ sudo systemctl stop docker
    sudo nano /etc/docker/daemon.json
    ```
    if the file is already there, add line `"storage-driver" : "overlay2" `

    if the file is empty, you can go with ` echo '{ "storage-driver" : "overlay2" }' > /etc/docker/daemon.json`
    `sudo systemctl start docker`

  8. marcelrv revised this gist Oct 5, 2021. 1 changed file with 4 additions and 2 deletions.
    6 changes: 4 additions & 2 deletions docker-migrate.md
    View file
    Original file line number Diff line number Diff line change
    @@ -6,7 +6,9 @@ note. Based on https://www.sylvaincoudeville.fr/2019/12/docker-migrer-le-stockag
    NOT WORKING!!!! IF FOLLOWING THE ABOVE.. SOMEHOW THE CONTAINERS DO NOT RE-APPEAR!

    The only way I found that is somewhat automated is the the docker-compose way..

    Which is still not 100% and require manual fixing of stupid errors of the docker-compose tool (mainly things that ere not interpreted right, like dates & userIds that need to manually surrounded by quotes etc)

    Also I needed to add `network_mode: bridge` to the configs as I did not want a network definition for each container which seems to be the docker-compose default way

    ## Backup the whole crap before doing heart surgery
    @@ -16,7 +18,7 @@ sudo cp -au /var/lib/docker /var/lib/docker.bk
    sudo systemctl start docker
    ```

    ## Migrate
    ## Export Containers
    Export all container configs

    ```
    @@ -38,7 +40,7 @@ for c in $CIDS; do cd ~/dockercontainers/$c ; echo ======== $c ======= ;docker-c
    ```

    Store all images (I think not needed if no persistent references are used)
    ## Store all images (I think not needed if no persistent references are used)

    ```
    cd ~
  9. marcelrv revised this gist Oct 5, 2021. 1 changed file with 2 additions and 1 deletion.
    3 changes: 2 additions & 1 deletion docker-migrate.md
    View file
    Original file line number Diff line number Diff line change
    @@ -1,7 +1,8 @@
    # Docker migrate to overlay2 from aufs script

    Crazy that this is pretty much forced change without proper transition script
    Based on https://www.sylvaincoudeville.fr/2019/12/docker-migrer-le-stockage-aufs-vers-overlay2/

    note. Based on https://www.sylvaincoudeville.fr/2019/12/docker-migrer-le-stockage-aufs-vers-overlay2/
    NOT WORKING!!!! IF FOLLOWING THE ABOVE.. SOMEHOW THE CONTAINERS DO NOT RE-APPEAR!

    The only way I found that is somewhat automated is the the docker-compose way..
  10. marcelrv revised this gist Oct 5, 2021. 1 changed file with 5 additions and 5 deletions.
    10 changes: 5 additions & 5 deletions docker-migrate.md
    View file
    Original file line number Diff line number Diff line change
    @@ -20,12 +20,12 @@ Export all container configs

    ```
    cd ~
    mkdir dockercontainers
    sudo docker container list > dockercontainers/containers.txt
    cat dockercontainers/containers.txt
    mkdir ~/dockercontainers
    sudo docker container list -a > ~/dockercontainers/containers.txt
    cat ~/dockercontainers/containers.txt
    CIDS=$(docker container list -all | sed '1d' | awk '{print $1}')
    for c in $CIDS; do mkdir dockercontainers/$c ; docker run --rm -v /var/run/docker.sock:/var/run/docker.sock ghcr.io/red5d/docker-autocompose $c > ~/dockercontainers/$c/docker-compose.yml ; done
    CIDS=$(docker container list -a | sed '1d' | awk '{print $1}')
    for c in $CIDS; do mkdir ~/dockercontainers/$c ; docker run --rm -v /var/run/docker.sock:/var/run/docker.sock ghcr.io/red5d/docker-autocompose $c > ~/dockercontainers/$c/docker-compose.yml ; done
    # or if local (with fixes)
    for c in $CIDS; do mkdir ~/dockercontainers/$c ; ~/autocompose.py $c > dockercontainers/$c/docker-compose.yml ; done
  11. marcelrv revised this gist Oct 5, 2021. 1 changed file with 9 additions and 0 deletions.
    9 changes: 9 additions & 0 deletions docker-migrate.md
    View file
    Original file line number Diff line number Diff line change
    @@ -77,3 +77,12 @@ for c in $IDS; do docker load -i $c; done
    ## Restore containers

    `for c in $CIDS; do cd ~/dockercontainers/$c ; docker-compose up -d --no-deps --build ; done`


    When something goes horrably wrong you can remove the containers and try again
    ```
    docker container stop `docker container ls -aq`
    docker container rm `docker container ls -aq`
    ```


  12. marcelrv revised this gist Oct 5, 2021. 1 changed file with 1 addition and 1 deletion.
    2 changes: 1 addition & 1 deletion docker-migrate.md
    View file
    Original file line number Diff line number Diff line change
    @@ -24,7 +24,7 @@ mkdir dockercontainers
    sudo docker container list > dockercontainers/containers.txt
    cat dockercontainers/containers.txt
    CIDS=$(docker container list | sed '1d' | awk '{print $1}')
    CIDS=$(docker container list -all | sed '1d' | awk '{print $1}')
    for c in $CIDS; do mkdir dockercontainers/$c ; docker run --rm -v /var/run/docker.sock:/var/run/docker.sock ghcr.io/red5d/docker-autocompose $c > ~/dockercontainers/$c/docker-compose.yml ; done
    # or if local (with fixes)
  13. marcelrv revised this gist Oct 5, 2021. 1 changed file with 5 additions and 0 deletions.
    5 changes: 5 additions & 0 deletions docker-migrate.md
    View file
    Original file line number Diff line number Diff line change
    @@ -60,6 +60,11 @@ if the file is already there, add line `"storage-driver" : "overlay2" `
    if the file is empty, you can go with ` echo '{ "storage-driver" : "overlay2" }' > /etc/docker/daemon.json`
    `sudo systemctl start docker`

    What also works is edit the file first and than just restart (so no need to stop first)
    `sudo systemctl restart docker`



    ## Restore images

    ```
  14. marcelrv revised this gist Oct 5, 2021. 1 changed file with 12 additions and 12 deletions.
    24 changes: 12 additions & 12 deletions docker-migrate.md
    View file
    Original file line number Diff line number Diff line change
    @@ -1,11 +1,12 @@
    # Docker migrate to overlay2 from aufs script

    Crazy that this is pretty much forced change withour proper transition script
    Crazy that this is pretty much forced change without proper transition script
    Based on https://www.sylvaincoudeville.fr/2019/12/docker-migrer-le-stockage-aufs-vers-overlay2/

    NOT WORKING!!!! IF FOLLOWING THE ABOVE.. SOMEHOW THE CONTAINERS DO NOT RE-APPEAR!

    TRY the docker-compose way
    The only way I found that is somewhat automated is the the docker-compose way..
    Which is still not 100% and require manual fixing of stupid errors of the docker-compose tool (mainly things that ere not interpreted right, like dates & userIds that need to manually surrounded by quotes etc)
    Also I needed to add `network_mode: bridge` to the configs as I did not want a network definition for each container which seems to be the docker-compose default way

    ## Backup the whole crap before doing heart surgery
    ```
    @@ -23,18 +24,20 @@ mkdir dockercontainers
    sudo docker container list > dockercontainers/containers.txt
    cat dockercontainers/containers.txt
    IDS=$(docker container list | sed '1d' | awk '{print $1}')
    for c in $IDS; do mkdir dockercontainers/$c ; docker run --rm -v /var/run/docker.sock:/var/run/docker.sock ghcr.io/red5d/docker-autocompose $c > ~/dockercontainers/$c/docker-compose.yml ; done
    CIDS=$(docker container list | sed '1d' | awk '{print $1}')
    for c in $CIDS; do mkdir dockercontainers/$c ; docker run --rm -v /var/run/docker.sock:/var/run/docker.sock ghcr.io/red5d/docker-autocompose $c > ~/dockercontainers/$c/docker-compose.yml ; done
    # or if local (with fixes)
    for c in $IDS; do mkdir ~/dockercontainers/$c ; ~/autocompose.py $c > dockercontainers/$c/docker-compose.yml ; done
    for c in $CIDS; do mkdir ~/dockercontainers/$c ; ~/autocompose.py $c > dockercontainers/$c/docker-compose.yml ; done
    # check if there are no errors in the created files
    for c in $IDS; do cd ~/dockercontainers/$c ; echo ======== $c ======= ;docker-compose config ; done
    for c in $CIDS; do cd ~/dockercontainers/$c ; echo ======== $c ======= ;docker-compose config ; done
    #Fix possible errors...
    ```

    Store all images
    Store all images (I think not needed if no persistent references are used)

    ```
    cd ~
    @@ -47,9 +50,6 @@ for c in $IDS; do docker save -o dockersave/$c.tar $c; done
    cat dockersave/list.txt | sed '1d' | grep -v "" | awk '{ print "docker tag "$3" "$1":"$2 }'>> dockersave/tag
    ```




    ## Change driver

    ```
    @@ -71,4 +71,4 @@ for c in $IDS; do docker load -i $c; done

    ## Restore containers

    for c in $IDS; do cd ~/dockercontainers/$c ; docker-compose up -d --no-deps --build ; done
    `for c in $CIDS; do cd ~/dockercontainers/$c ; docker-compose up -d --no-deps --build ; done`
  15. marcelrv revised this gist Oct 5, 2021. 1 changed file with 7 additions and 4 deletions.
    11 changes: 7 additions & 4 deletions docker-migrate.md
    View file
    Original file line number Diff line number Diff line change
    @@ -3,9 +3,9 @@
    Crazy that this is pretty much forced change withour proper transition script
    Based on https://www.sylvaincoudeville.fr/2019/12/docker-migrer-le-stockage-aufs-vers-overlay2/

    NOT WORKING!!!!
    SOMEHOW THE CONTAINERS DO NOT RE-APPEAR!
    NOT WORKING!!!! IF FOLLOWING THE ABOVE.. SOMEHOW THE CONTAINERS DO NOT RE-APPEAR!

    TRY the docker-compose way

    ## Backup the whole crap before doing heart surgery
    ```
    @@ -24,10 +24,13 @@ sudo docker container list > dockercontainers/containers.txt
    cat dockercontainers/containers.txt
    IDS=$(docker container list | sed '1d' | awk '{print $1}')
    for c in $IDS; do mkdir dockercontainers/$c ; docker run --rm -v /var/run/docker.sock:/var/run/docker.sock ghcr.io/red5d/docker-autocompose $c > dockercontainers/$c/docker-compose.yml ; done
    for c in $IDS; do mkdir dockercontainers/$c ; docker run --rm -v /var/run/docker.sock:/var/run/docker.sock ghcr.io/red5d/docker-autocompose $c > ~/dockercontainers/$c/docker-compose.yml ; done
    # or if local (with fixes)
    for c in $IDS; do mkdir dockercontainers/$c ; ~/autocompose.py $c > dockercontainers/$c/docker-compose.yml ; done
    for c in $IDS; do mkdir ~/dockercontainers/$c ; ~/autocompose.py $c > dockercontainers/$c/docker-compose.yml ; done
    # check if there are no errors in the created files
    for c in $IDS; do cd ~/dockercontainers/$c ; echo ======== $c ======= ;docker-compose config ; done
    ```

  16. marcelrv revised this gist Oct 5, 2021. 1 changed file with 4 additions and 0 deletions.
    4 changes: 4 additions & 0 deletions docker-migrate.md
    View file
    Original file line number Diff line number Diff line change
    @@ -25,6 +25,10 @@ cat dockercontainers/containers.txt
    IDS=$(docker container list | sed '1d' | awk '{print $1}')
    for c in $IDS; do mkdir dockercontainers/$c ; docker run --rm -v /var/run/docker.sock:/var/run/docker.sock ghcr.io/red5d/docker-autocompose $c > dockercontainers/$c/docker-compose.yml ; done
    # or if local (with fixes)
    for c in $IDS; do mkdir dockercontainers/$c ; ~/autocompose.py $c > dockercontainers/$c/docker-compose.yml ; done
    ```

    Store all images
  17. marcelrv revised this gist Oct 4, 2021. 1 changed file with 7 additions and 4 deletions.
    11 changes: 7 additions & 4 deletions docker-migrate.md
    View file
    Original file line number Diff line number Diff line change
    @@ -15,8 +15,7 @@ sudo systemctl start docker
    ```

    ## Migrate

    Store all containers
    Export all container configs

    ```
    cd ~
    @@ -25,8 +24,7 @@ sudo docker container list > dockercontainers/containers.txt
    cat dockercontainers/containers.txt
    IDS=$(docker container list | sed '1d' | awk '{print $1}')
    for c in $IDS; do docker commit $c dockercontainers/$c.tar ; done
    cat dockersave/list.txt | sed '1d' | grep -v "" | awk '{ print "docker tag "$3" "$1":"$2 }'>> dockersave/tag
    for c in $IDS; do mkdir dockercontainers/$c ; docker run --rm -v /var/run/docker.sock:/var/run/docker.sock ghcr.io/red5d/docker-autocompose $c > dockercontainers/$c/docker-compose.yml ; done
    ```

    Store all images
    @@ -61,4 +59,9 @@ if the file is empty, you can go with ` echo '{ "storage-driver" : "overlay2" }'
    cd dockersave/
    IDS=$(ls *.tar)
    for c in $IDS; do docker load -i $c; done
    ```


    ## Restore containers

    for c in $IDS; do cd ~/dockercontainers/$c ; docker-compose up -d --no-deps --build ; done
  18. marcelrv created this gist Oct 4, 2021.
    64 changes: 64 additions & 0 deletions docker-migrate.md
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,64 @@
    # Docker migrate to overlay2 from aufs script

    Crazy that this is pretty much forced change withour proper transition script
    Based on https://www.sylvaincoudeville.fr/2019/12/docker-migrer-le-stockage-aufs-vers-overlay2/

    NOT WORKING!!!!
    SOMEHOW THE CONTAINERS DO NOT RE-APPEAR!


    ## Backup the whole crap before doing heart surgery
    ```
    sudo systemctl stop docker
    sudo cp -au /var/lib/docker /var/lib/docker.bk
    sudo systemctl start docker
    ```

    ## Migrate

    Store all containers

    ```
    cd ~
    mkdir dockercontainers
    sudo docker container list > dockercontainers/containers.txt
    cat dockercontainers/containers.txt
    IDS=$(docker container list | sed '1d' | awk '{print $1}')
    for c in $IDS; do docker commit $c dockercontainers/$c.tar ; done
    cat dockersave/list.txt | sed '1d' | grep -v "" | awk '{ print "docker tag "$3" "$1":"$2 }'>> dockersave/tag
    ```

    Store all images

    ```
    cd ~
    mkdir dockersave
    sudo docker images > dockersave/list.txt
    cat dockersave/list.txt
    IDS=$(docker images | sed '1d' | awk '{print $3}')
    for c in $IDS; do docker save -o dockersave/$c.tar $c; done
    cat dockersave/list.txt | sed '1d' | grep -v "" | awk '{ print "docker tag "$3" "$1":"$2 }'>> dockersave/tag
    ```




    ## Change driver

    ```
    sudo systemctl stop docker
    sudo nano /etc/docker/daemon.json
    ```
    if the file is already there, add line `"storage-driver" : "overlay2" `
    if the file is empty, you can go with ` echo '{ "storage-driver" : "overlay2" }' > /etc/docker/daemon.json`
    `sudo systemctl start docker`

    ## Restore images

    ```
    cd dockersave/
    IDS=$(ls *.tar)
    for c in $IDS; do docker load -i $c; done