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Why docker command connects to daemon via tcp by default


Docker can't connect to docker daemonFrom inside of a Docker container, how do I connect to the localhost of the machine?can't restart docker after resetting the docker socker using docker -H tcp://0.0.0.0:2375Docker command can't connect to Docker daemonUpdating docker registry in ubuntu 14.0“nginx-proxy” docker image socket volume not mountedCannot connect to the Docker daemonHow to connect to remote docker running on Ubuntu hostWhy is it vulnerable to bind docker daemon to 0.0.0.0?Can't talk to dind when using google/could-sdk instead of docker:stable in GitLab, why is that?













0















Docker is configured by default to listen on socket (Ubuntu 18.04).




$ ps aux | grep docker
root 1966 0.2 0.4 1451444 69700 ?

Ssl 09:57 0:01 /usr/bin/dockerd -H fd://
--containerd=/run/containerd/containerd.sock




But when I run docker ps it raises:




$ docker ps
Cannot connect to the Docker daemon at
tcp://127.0.0.1:2375. Is the docker daemon running?




I need to specify:




$ docker -H unix:///var/run/docker.sock ps
CONTAINER ID IMAGE

COMMAND CREATED STATUS PORTS
NAMES 7ffd2dc852f2 jwilder/nginx-proxy

"/app/docker-entrypo…" 5 minutes ago Up 5 minutes

0.0.0.0:80->80/tcp nginx-proxy




Then works fine, but why cli wants to connect daemon by default via tcp? How to avoid that?






docker ubuntu







share|improve this question


























    0















    Docker is configured by default to listen on socket (Ubuntu 18.04).




    $ ps aux | grep docker
    root 1966 0.2 0.4 1451444 69700 ?

    Ssl 09:57 0:01 /usr/bin/dockerd -H fd://
    --containerd=/run/containerd/containerd.sock




    But when I run docker ps it raises:




    $ docker ps
    Cannot connect to the Docker daemon at
    tcp://127.0.0.1:2375. Is the docker daemon running?




    I need to specify:




    $ docker -H unix:///var/run/docker.sock ps
    CONTAINER ID IMAGE

    COMMAND CREATED STATUS PORTS
    NAMES 7ffd2dc852f2 jwilder/nginx-proxy

    "/app/docker-entrypo…" 5 minutes ago Up 5 minutes

    0.0.0.0:80->80/tcp nginx-proxy




    Then works fine, but why cli wants to connect daemon by default via tcp? How to avoid that?






    docker ubuntu







    share|improve this question
























      0












      0








      0








      Docker is configured by default to listen on socket (Ubuntu 18.04).




      $ ps aux | grep docker
      root 1966 0.2 0.4 1451444 69700 ?

      Ssl 09:57 0:01 /usr/bin/dockerd -H fd://
      --containerd=/run/containerd/containerd.sock




      But when I run docker ps it raises:




      $ docker ps
      Cannot connect to the Docker daemon at
      tcp://127.0.0.1:2375. Is the docker daemon running?




      I need to specify:




      $ docker -H unix:///var/run/docker.sock ps
      CONTAINER ID IMAGE

      COMMAND CREATED STATUS PORTS
      NAMES 7ffd2dc852f2 jwilder/nginx-proxy

      "/app/docker-entrypo…" 5 minutes ago Up 5 minutes

      0.0.0.0:80->80/tcp nginx-proxy




      Then works fine, but why cli wants to connect daemon by default via tcp? How to avoid that?






      docker ubuntu







      share|improve this question














      Docker is configured by default to listen on socket (Ubuntu 18.04).




      $ ps aux | grep docker
      root 1966 0.2 0.4 1451444 69700 ?

      Ssl 09:57 0:01 /usr/bin/dockerd -H fd://
      --containerd=/run/containerd/containerd.sock




      But when I run docker ps it raises:




      $ docker ps
      Cannot connect to the Docker daemon at
      tcp://127.0.0.1:2375. Is the docker daemon running?




      I need to specify:




      $ docker -H unix:///var/run/docker.sock ps
      CONTAINER ID IMAGE

      COMMAND CREATED STATUS PORTS
      NAMES 7ffd2dc852f2 jwilder/nginx-proxy

      "/app/docker-entrypo…" 5 minutes ago Up 5 minutes

      0.0.0.0:80->80/tcp nginx-proxy




      Then works fine, but why cli wants to connect daemon by default via tcp? How to avoid that?






      docker ubuntu




      docker ubuntu






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Mar 8 at 9:46









      DanielDaniel

      213




      213






















          1 Answer
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          0














          docker client uses DOCKER_HOST environment value if set otherwise default to unix:///var/run/docker.sock. Check if you have DOCKER_HOST environment variable set?






          share|improve this answer






















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            1 Answer
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            0














            docker client uses DOCKER_HOST environment value if set otherwise default to unix:///var/run/docker.sock. Check if you have DOCKER_HOST environment variable set?






            share|improve this answer



























              0














              docker client uses DOCKER_HOST environment value if set otherwise default to unix:///var/run/docker.sock. Check if you have DOCKER_HOST environment variable set?






              share|improve this answer

























                0












                0








                0







                docker client uses DOCKER_HOST environment value if set otherwise default to unix:///var/run/docker.sock. Check if you have DOCKER_HOST environment variable set?






                share|improve this answer













                docker client uses DOCKER_HOST environment value if set otherwise default to unix:///var/run/docker.sock. Check if you have DOCKER_HOST environment variable set?







                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered Mar 8 at 11:08









                Aakash SharmaAakash Sharma

                1483




                1483





























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