Am I trying to connect to a TLS-enabled daemon without TLS

Question

I m trying to learn about Docker  but I keep getting cryptic  to me  error messages   Possibly the simplest example of this is trying to print the version of Docker I installed     sudo docker version Client version  1 4 1 Client API version  1 16 Go version  client   go1 3 3 Git commit  client   5bc2ff8 OS Arch  client   darwin amd64 FATA 0000  Get http    var run docker sock v1 16 version      dial unix  var run docker sock  no such file or directory      Are you trying to connect to a TLS-enabled daemon without TLS    I ve just been going through the user guide and following every step exactly  so I m surprised that I get this message    What should I do now   I just noticed that if I don t use sudo I don t get the error     docker version Client version  1 4 1 Client API version  1 16 Go version  client   go1 3 3 Git commit  client   5bc2ff8 OS Arch  client   darwin amd64 Server version  1 4 1 Server API version  1 16 Go version  server   go1 3 3 Git commit  server   5bc2ff8   Of course  this is not a solution as I may need to use sudo somewhere down the road     I just found another page saying  If you re using OS X then you shouldn t use sudo   I don t know if they mean only for that example  or in general

User · Answer

It is possible that you do not have the permission to the file yet. It happened to me after I add myself to dockergroup using

sudo gpasswd -a user docker

but not yet logout.

To resolve this, you can either re-login, or use sg docker "docker <subcommand> ..." before you logout.

If you are in group docker in /etc/group, you should be able to run it without typing password.

https://dingyichen.wordpress.com/2015/02/05/docker-dial-unix-varrundocker-sock-no-such-file-or-directory-are-you-trying-to-connect-to-a-tls-enabled-daemon-without-tls/

User · Answer

On Ubuntu after installing lxc-docker you need to add your user to the docker user group   sudo usermod -a -G docker myusername   This is because of the socket file permissions   srw-rw---- 1 root docker 0 Mar 20 07 43  var run docker sock   DO NOT RUN usermod WITHOUT  -a  as suggested in one of the other comments or it will wipe your additional groups setting and will just leave the  docker  group  This is what will happen         id pawel uid 1000 pawel  gid 1000 pawel  groups 1000 pawel  4 adm  24 cdrom  27 sudo  30 dip  46 plugdev  108 lpadmin  124 sambashare  998 docker        usermod -G docker pawel       id pawel                uid 1000 pawel  gid 1000 pawel  groups 1000 pawel  998 docker

User · Answer

In my case  Linux Mint 17  I did various things  and I m not sure about which of them are totally necessary   I included missing Ubuntu packages     sudo apt-get install apparmor lxc cgroup-lite   A user was added to group docker     sudo usermod -aG docker   USER    Started daemon  openSUSE just needs this     sudo docker -d     Thanks Attribution    Thanks Usman Ismail  because maybe it was just that last thing        Stupid question but have you started the docker daemon       Usman Ismail Dec 17  14 at 15 04     Thanks also to github MichaelJCole for the solution that worked for me  because I didn t check for the daemon when I read Usman s comment   GitHub comment   sudo apt-get install apparmor lxc cgroup-lite sudo apt-get  install docker io   If you installed docker io first  you ll have to start it manually sudo docker -d sudo docker run -i -t ubuntu  bin bash     Thanks to fredjean net post for noticing the missing packages and forget about the default Ubuntu installation instructions and google about other ways     It turns out that the cgroup-lite and the lxc packages are not installed by default on Linux Mint  Installing both then allowed me to run bash in the base image and then build and run my image      Thanks to brettof86 s comment about openSUSE

User · Answer

For me  running   boot2docker shellinit 2 gt   dev null  fixed the problem   This runs the output of the boot2docker shellinit command  the three set -x     lines  in your current terminal session  which lets the docker command know where to find the boot2docker virtual machine   Adding   boot2docker shellinit 2 gt   dev null  to the bottom of your    bash profile file will make sure the docker command is configured  every time you open your terminal     For people using Fish shell  boot2docker shellinit    dev null   source     Note that 2 gt   dev null  and the Fish equivalent    dev null  are optional  Like  pablo-fernandez suggested  this hides the Writing    lines

User · Answer

For me the following steps worked    I noticed that running docker run hello-world fails with this socked error as in the question  but running sudo docker run hello-world worked  I added my current user to the docker group  sudo adduser user docker  Then you must restart your machine or use su - user  check using groups command if are in the docker group     After that  hello-world started to work   My answer is based on How can I use docker without sudo  which explains what go wrong

User · Answer

I was getting the same error on MacOS with sudo and without it   I have solved it with   boot2docker start   boot2docker shellinit    P S   Thanks to Alan  I found out that this approach is recommended in their official documentation   P S 2  Sometimes boot2docker init can be required before running two commands  thank you Aaron

User · Answer

Everything that you need to run Docker on Linux Ubuntu Mint   sudo apt-get -y install lxc sudo gpasswd -a   USER  docker newgrp docker sudo service docker restart   Optionally  you may need to install two additional dependencies if the above doesn t work   sudo apt-get -y install apparmor cgroup-lite sudo service docker restart

User · Answer

The Docker daemon binds to a Unix socket instead of a TCP port  By default that Unix socket is owned by the user root and other users can only access it using sudo  The Docker daemon always runs as the root user   sudo groupadd docker sudo usermod -aG docker  USER   Log out and log back in so that your group membership is re-evaluated   docker run hello-world   Source  Manage Docker as a non-root user

User · Answer

For what it is worth  I tried all the solutions in this question and in this related question and none resolved my issue until I uninstalled and re-installed VirtualBox  This process upgraded the VirtualBox from version 4 2 16 to 4 3 22  my previous one had been lying unused on the system for a few months    Then boot2docker and docker worked without any other adjustments

User · Answer

I had the same issue and tried various things to fix this  amending the  bash profile file  logging in and out  without any luck  In the end  restarting my machine fixed it

User · Answer

I tried the solutions here  and boot2docker didn t work   My solution  Uninstall boot2docker on the Mac  install a Centos nbsp 7 VM in VirtualBox  and work with Docker inside that VM

User · Answer

You will need to do    boot2docker init  boot2docker start   The following settings fixed the issue    export DOCKER HOST tcp   192 168 59 103 2376  export DOCKER CERT PATH  Users  profileName   boot2docker certs boot2docker-vm  export DOCKER TLS VERIFY 1

User · Answer

Another possible reason is that your BIOS CPU visualization is not enabled  Go and enable it first

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Docker calls itself a self-sufficient runtime for Linux containers  In simple terms it acts both as server and client  The   docker version command query is internal to the Docker executable and not to the daemon service running    docker images or   docker ps or   docker pull centos are commands which send queries to the docker daemon service running  Docker by default supports TLS connections to its daemon service  Only if the user you are logged in as is part of user group docker or you have used sudo before the command  e g    sudo docker images  does it not require TLS connectivity    Visit Docker documentation page Protect the Docker daemon socket   Scroll a little to the top and find warning section for clarity

User · Answer

TLDR  This got my Python meetup group past this problem when I was running a clinic on installing docker and most of the users were on OS X   boot2docker init boot2docker up   run the export commands the output gives you  then  docker info   should tell you it works     The Context  what brought us to the problem   I led a clinic on installing docker and most attendees had OS X  and we ran into this problem and I overcame it on several machines  Here s the steps we followed   First  we installed homebrew  yes  some attendees didn t have it    ruby -e    curl -fsSL https   raw githubusercontent com Homebrew install master install     Then we got cask  which we used to install virtualbox  and then used brew to install docker and boot2docker  all required for OS X  Don t use sudo for brew    brew install caskroom cask brew-cask brew cask install virtualbox brew install docker brew install boot2docker   The Solution  That was when we ran into the problem the asker here got  The following fixed it  I understand init was a one-time deal  but you ll probably have to run up every time you start docker   boot2docker init boot2docker up   Then when up has been run  it gives several export commands  Copy-paste and run those   Finally docker info should tell you it s properly installed    To Demo  The rest of the commands should demo it   on Ubuntu linux I required sudo    docker run hello-world docker run -it ubuntu bash   Then you should be on a root shell in the container   apt-get install nano exit   Back to your native user bash   docker ps -l   Look for the about 12 digit hexadecimal  0-9 or a-f  identifier under  Container ID   e g  456789abcdef  You can then commit your change and name it some descriptive name  like descriptivename   docker commit 456789abcdef descriptivename

User · Answer

The underlining problem is simple     lack of permission to  var run docker sock unix domain socket   From Daemon socket option chapter of Docker Command Line reference for Docker 1 6 0       By default  a unix domain socket  or IPC socket  is created at    var run docker sock  requiring either root permission  or docker   group membership    Steps necessary to grant rights to users are nicely described in Docker installation instructions for Fedora      Granting rights to users to use Docker        The docker command line tool   contacts the docker daemon process via a socket file    var run docker sock owned by root root  Though it s recommended to   use sudo for docker commands  if users wish to avoid it  an   administrator can create a docker group  have it own    var run docker sock  and add users to this group         sudo groupadd docker     sudo chown root docker  var run docker sock     sudo usermod -a -G docker  USERNAME     Log out and log back in for above changes to take effect  Please note that Docker packages of some Linux distributions  Ubuntu  do already place  var run docker sock in the docker group making the first two of above steps unnecessary   In case of OS X and boot2docker the situation is different  the Docker daemon runs inside a VM so the DOCKER HOST environment variable must be set to this VM so that the Docker client could find the Docker daemon  This is done by running   boot2docker shellinit  in the shell

User · Answer

Make sure the Docker daemon is running   service docker start   That fixed it for me

User · Answer

I faced the same issue when I was creating Docker images from Jenkins  Simply add the user to the docker group and then restart Docker services and in my case I had to restart Jenkins services   This was the error which I got   http    var run docker sock v1 19 build cgroupparent  amp cpuperiod 0 amp cpuquota 0 amp cpusetcpus  amp cpusetmems  amp cpushares 0 amp dockerfile Dockerfile amp memory 0 amp memswap 0 amp rm 1 amp t 59aec062a8dd8b579ee1b61b299e1d9d340a1340  dial unix  var run docker sock  permission denied  Are you trying to connect to a TLS-enabled daemon without TLS  FATAL  Failed to build docker image from project Dockerfile java lang RuntimeException  Failed to build docker image from project Dockerfile  Solution    root Jenkins ssh   groupadd docker  root Jenkins ssh   gpasswd -a jenkins docker Adding user jenkins to group docker  root Jenkins ssh    etc init d docker restart Stopping docker                                               OK    Starting docker                                               OK     root Jenkins ssh    etc init d jenkins restart Shutting down Jenkins                                         OK    Starting Jenkins                                              OK     root Jenkins ssh

User · Answer

Make sure there is  127 0 0 1    localhost   in your     etc hosts     file

User · Answer

I had the same problem  A simple service docker restart solved the problem

[docker] Am I trying to connect to a TLS-enabled daemon without TLS?

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