how to get docker-compose to use the latest image from repository

Question

I don t know what I m doing wrong  but I simply cannot get docker-compose up to use the latest image from our registry without first removing the old containers from the system completely  It looks like compose is using the previously started image even though docker-compose pull has fetched a newer image   I looked at How to get docker-compose to always re-create containers from fresh images  which seemed to be similar to my issue  but none of the provided solutions there work for me  since I m looking for a solution I can use on the production server and there I don t want to be removing all containers before starting them again  possible data loss    I would like for compose only to detect the new version of the changed images  pull them and then restart the services with those new images   I created a simple test project for this in which the only goal is to get a version nr to increase on each new build  The version nr is displayed if I browse to the nginx server that is created  this works as expected locally    docker version  1 11 2 docker-compose version  1 7 1 OS  tested on both CentOS 7 and OS X 10 10 using docker-toolbox  My docker-compose yml   version   2  services    application      image  ourprivate docker reg 5000 ourcompany buildchaintest 0 1 8-dev     volumes        -  var www html     tty  true    nginx      build  nginx     ports        -  80 80      volumes from        - application     volumes        -   logs nginx   var log nginx   php      container name  buildchaintest php 1     build  php-fpm     expose        -  9000      volumes from        - application     volumes        -   logs php-fpm   var www logs   on our jenkins server I run the following to build and tag the image  cd  WORKSPACE  amp  amp  PROJECT VERSION   cat VERSION -dev  usr local bin docker-compose rm -f  usr local bin docker-compose build docker tag ourprivate docker reg 5000 ourcompany buildchaintest ourprivate docker reg 5000 ourcompany buildchaintest  PROJECT VERSION docker push ourprivate docker reg 5000 ourcompany buildchaintest   this seems to be doing what it s supposed to be since I get a new version tag in our repository each time the build completes and the version nr has been bumped   If I now run  docker-compose pull  amp  amp  docker-compose -f docker-compose yml up -d   in a folder on my computer  where the contents is only the docker-compose yml and the necessary Dockerfiles to build the nginx and php services  the output I get is not the latest version number as has been tagged in the registry or is shown in the docker-compose yml  0 1 8   but the version before that  which is 0 1 7  However the output of the pull command would suggest that a new version of the image was fetched   Pulling application  ourprivate docker reg 5000 ourcompany buildchaintest latest     latest  Pulling from ourcompany buildchaintest Digest  sha256 8f7a06203005ff932799fe89e7756cd21719cccb9099b7898af2399414bfe62a Status  Downloaded newer image for docker locotech fi 5000 locotech buildchaintest 0 1 8-dev   Only if I run   docker-compose stop  amp  amp  docker-compose rm -f   and then run the docker-compose up command do I get the new version to show up on screen as expected    Is this intended behaviour of docker-compose  i e  should I always do a docker-compose rm -f before running up again  even on production servers  Or am I doing something against the grain here  which is why it s not working    The goal is to have our build process build and create tagged versions of the images needed in a docker-compose yml  push those to our private registry and then for the  release to production-step  to simply copy the docker-compose yml to the production server and run a docker-compose pull  amp  amp  docker-compose -f docker-compose yml up -d for the new image to start in production  If anyone has tips on this or can point to a best practices tutorial for this kind of setup that would be much appreciated also

User · Answer

The docker-compose documentation for the 'up' command clearly states that it updates the container should the image be changed since the last 'up' was performed:

If there are existing containers for a service, and the service’s configuration or image was changed after the container’s creation, docker-compose up picks up the changes by stopping and recreating the containers (preserving mounted volumes).

So by using 'stop' followed by 'pull' and then 'up' this should therefore avoid issues of lost volumes for the running containers, except of course, for containers whose images have been updated.

I am currently experimenting with this process and will include my results in this comment shortly.

User · Answer

I am using following command to get latest images  sudo docker-compose down -rmi all  sudo docker-compose up -d

User · Answer

Since 2020-05-07  the docker-compose spec also defines the  quot pull policy quot  property for a service  version   3 7   services    my-service      image  someimage somewhere     pull policy  always  The docker-compose spec says  pull policy defines the decisions Compose implementations will make when it starts to pull images   Possible values are  tl dr  check spec for more details    always  always pull never  don t pull  breaks if the image can not be found  missing  pulls if the image is not cached build  always build or rebuild

User · Answer

If the docker compose configuration is in a file  simply run    docker-compose -f appName yml down  amp  amp  docker-compose -f appName yml pull  amp  amp  docker-compose -f appName yml up -d

User · Answer

I ve seen this occur in our 7-8 docker production system  Another solution that worked for me in production was to run  docker-compose down docker-compose up -d   this removes the containers and seems to make  up  create new ones from the latest image   This doesn t yet solve my dream of down up per EACH changed container  serially  less down time   but it works to force  up  to update the containers

User · Answer

To close this question  what seemed to have worked is indeed running   docker-compose stop docker-compose rm -f docker-compose -f docker-compose yml up -d   I e  remove the containers before running up again   What one needs to keep in mind when doing it like this is that data volume containers are removed as well if you just run rm -f  In order to prevent that I specify explicitly each container to remove   docker-compose rm -f application nginx php   As I said in my question  I don t know if this is the correct process  But this seems to work for our use case  so until we find a better solution we ll roll with this one

User · Answer

But      https   docs docker com compose reference up    -quiet-pull  Pull without printing progress information   docker-compose up --quiet-pull   not work

User · Answer

I spent half a day with this problem  The reason was that be sure to check where the volume was recorded      volumes          - api-data  src patterns   But the fact is that in this place was the code that we changed  But when updating the docker  the code did not change   Therefore  if you are checking someone else s code and for some reason you are not updating  check this   And so in general this approach works      docker-compose down      docker-compose build       docker-compose up -d

User · Answer

in order to make sure  that you are using the latest version for your  latest tag from your registry  e g  docker hub  you need to also pull the latest tag again  in case it changed  the diff will be downloaded and started when you docker-compose up again   so this would be the way to go   docker-compose stop docker-compose rm -f docker-compose pull    docker-compose up -d   i glued this into an image that i run to start docker-compose and make sure images stay up-to-date  https   hub docker com r stephanlindauer docker-compose-updater

User · Answer

To get the latest images use docker-compose build --pull  I use below command which is really 3 in 1   docker-compose down  amp  amp  docker-compose build --pull  amp  amp  docker-compose up -d  This command will stop the services  pulls the latest image and then starts the services

User · Answer

Option down resolve this problem  I run my compose file   docker-compose -f docker docker-compose yml up -d  then I delete all with down --rmi all  docker-compose -f docker docker-compose yml down --rmi all  Stops containers and removes containers  networks  volumes  and images created by  up    By default  the only things removed are   - Containers for services defined in the Compose file - Networks defined in the  networks  section of the Compose file - The default network  if one is used  Networks and volumes defined as  external  are never removed   Usage  down  options   Options      --rmi type          Remove images  Type must be one of                           all   Remove all images used by any service                           local   Remove only images that don t have a custom tag                         set by the  image  field      -v  --volumes       Remove named volumes declared in the  volumes  section                         of the Compose file and anonymous volumes                         attached to containers      --remove-orphans    Remove containers for services not defined in the                         Compose file

[docker] how to get docker-compose to use the latest image from repository

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