Docker-Compose can t connect to Docker Daemon

Question

I am getting an error message saying I can t connect to the docker daemon   I have looked into other people s answers who have had similar issues but it hasn t helped   I am running the version of Ubuntu 15 10   I will try to provide all the info I have   root   docker-compose -f docker-compose-deps yml up -d ERROR  Couldn t connect to Docker daemon at http docker   localunixsocket - is it running   If it s at a non-standard location  specify the URL with the DOCKER HOST environment variable    Docker Version  root   sudo docker     version Client  Version       1 9 1 API version   1 21 Go version    go1 4 2 Git commit    a34a1d5 Built         Fri Nov 20 13 20 08 UTC 2015 OS Arch       linux amd64 Cannot connect to the Docker daemon  Is the docker daemon running on this host    Docker-Compose Version  root   docker-compose --version docker-compose version 1 5 2  build 7240ff3   This is what happens if I try to stop or start the service     root   sudo service docker stop stop  Unknown instance   root   sudo service   docker start docker start running  process 5375   If I run ps aux   grep docker  root   ps aux   grep docker root      4233  0 0  0 0  13692  2204 pts 15   S    10 27   0 00 grep --color auto docker   Any help would be greatly appreciated   Let me know if you may need anymore information

User · Answer

I got this error when there were files in the Dockerfile directory that were not accessible by the current user  docker could thus not upload the full context to the daemon and brought the  Couldn t connect to Docker daemon at http docker   localunixsocket  message

User · Answer

I used Ubuntu 16 04 and found this problem too when I used docker-compose  I fixed it by running this command     sudo systemctl start docker   sudo docker-compose build

User · Answer

I had this problem and did not want to mess things up using sudo  When investigating  I tried to get some info    docker info   Surprinsingly  I had the following error       Got permission denied while trying to connect to the Docker daemon socket at unix    var run docker sock  Get http    var run docker sock v1 38 info  dial unix  var run docker sock  connect  permission denied   For some reason I did not have enough privileges  the following command solved my problem    sudo chown  USER  var run docker sock   Et voil

User · Answer

I found this and it seemed to fix my issue    GitHub Fix Docker Daemon Crash  I changed the content of my docker-compose-deps yml file as seen in the link   Then I ran docker-compose -f docker-compose-deps yml up -d   Then I changed it back and it worked for some reason   I didn t have to continue the steps in the link I provided  but the first two steps fixed the issue for me

User · Answer

One way to resolve this would be to first add your user to the docker group by running the following  sudo usermod -aG docker  USER   IMPORTANT  Remember to log out of your system  not just your terminal  and back in for this to take effect

User · Answer

Is there slight possibility you deleted default machine  But  first check if all files are there  OSX  similar on other systems   brew install docker docker-compose docker-machine xhyve docker-machine-driver-xhyve brew link docker docker-compose docker-machine xhyve docker-machine-driver-xhyve  sudo chown root wheel  usr local opt docker-machine-driver-xhyve bin docker-machine-driver-xhyve sudo chmod u s  usr local opt docker-machine-driver-xhyve bin docker-machine-driver-xhyve   Also  install Docker App  as it much easier to maintain containers   brew cask reinstall docker   ans start Docker app from finder  wait until service is fully started   Then  check instalation with   docker-machine ls   if no machines are present in list  create one and start it   docker-machine create default docker-machine start default   After this  build  compose and all other commands should work properly

User · Answer

in my case it is because the ubuntu permission    List item   check permission by   docker info    if they print problem permission    then use   sudo chmod -R 777  var run docker sock

User · Answer

I had the same issue  After taking notes and analyzing some debugging results  finally  I solved what can be the same error  Start the service first   service docker start  Don t forget to include your user to the docker group

User · Answer

I had the same error  after 15 min of debugging  Turns out all it needs is a sudo    Check out Create a Docker group to get rid of the sudo prefix

User · Answer

In my case a have the same error when I try to docker-compose build and my solution was just add sudo  sudo docker-compose build

User · Answer

I think it s because of right of access  you just have to write  sudo docker-compose-deps yml up

User · Answer

You should adding your user to the  docker  group with something like      sudo usermod -aG docker   USER

User · Answer

In my case your docker service might be stopped  Command to start docker service     sudo systemctl start docker  Command to verify if it start     sudo docker run hello-world

User · Answer

just try with sudo  It seems like permission issue  sudo docker-compose -f docker-compose-deps yml up -d  it worked for me

User · Answer

From the output of  ps aux   grep docker   it looks like docker daemon is not running  Try using below methods to see what is wrong and why docker is not starting   Check the docker logs     sudo tail -f  var log upstart docker log   Try starting docker in debug mode     sudo docker -d -D

User · Answer

It appears your issue was created by an old Docker bug  where the socket file was not recreated after Docker crashed  If this is the issue  then renaming the socket file should allow it to be re-created     sudo service docker stop   sudo mv  var lib docker  var lib docker bak   sudo service docker start   Since this bug is fixed  most people getting the error Couldn t connect to Docker daemon are probably getting it because they are not in the docker group and don t have permissions to read that file   Running with sudo docker     will fix that  but isn t a great solution   Docker can be run as a non-root user  without sudo  that has the proper group permissions  The Linux post-install docs has the details  The short version     sudo groupadd docker   sudo usermod -aG docker  USER   Log out and log back in again to apply the groups   groups    docker should be in the list of groups for your user   docker run hello-world    Works without sudo   This allows users in the docker group to run docker and docker-compose commands without sudo  Docker itself runs a root  allowing some attacks  so you still need to be careful with what containers you run  See Docker Security Documentation for more details

User · Answer

Another reason why this error can show up  for me it was a malformed image-path definition in the docker-compose yml     service      image    CONTAINER REGISTRY BASE  my-service          Lookis ok ish first  but i had CONTAINER REGISTRY BASE eu gcr io my-project  set on the env  Apparently the    in the image path caused this error   docker-compose  v 1 21 2 docker  18 03 1-ce

User · Answer

For me the fix was to install a newer version  1 24  of docker-compose using this article   The previous version  1 17  was installed from ubuntu s default repository  but after installing a newer version I managed to launch the container  Hope it helps somebody

[ubuntu] Docker-Compose can't connect to Docker Daemon

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