I'm working with a poor internet connection and trying to pull and run a image.
I wanted to download one layer at a time and per documentation tried adding a flat --max-concurrent-downloads like so:
docker run --rm -p 8787:8787 -e PASSWORD=blah --max-concurrent-downloads=1 rocker/verse
But this gives an error:
unknown flag: --max-concurrent-downloads See 'docker run --help'.
I tried typing docker run --help and interestingly did not see the option --max-concurrent-downloads.
I'm using Docker Toolbox since I'm on a old Mac.
Over here under l there's an option for --max-concurrent-downloads however this doesn't appear on my terminal when typing docker run --help
How can I change the default of downloading 3 layers at a time to just one?
From the official documentation: (https://docs.docker.com/engine/reference/commandline/pull/#concurrent-downloads)
You can pass --max-concurrent-downloads during a pull operation.
You can set --max-concurrent-downloads with the dockerd command.
If you're using the docker Desktop GUI for Mac or Windows:
You can edit the .json file directly in docker engine settings:
This setting needs to be passed to dockerd when starting the daemon, not to the docker client CLI. The dockerd process is running inside of a VM with docker-machine (and other docker desktop environments).
With docker-machine that is used in toolbox, you typically pass the engine flags on the docker-machine create command line, e.g.
docker-machine create --engine-opt max-concurrent-downloads=1
Once you have a created machine, you can follow the steps from these answers to modify the config of an already running machine, mainly:
SSH into your local docker VM.
note: if 'default' is not the name of your docker machine then substitute 'default' with your docker machine name $
docker-machine ssh default
Open Docker profile $ sudo vi /var/lib/boot2docker/profile
Then in that profile, you would add your --engine-opt max-concurrent-downloads=1.
Newer versions of docker desktop (along with any Linux install) make this much easier with a configuration menu daemon -> advanced where you can specify your daemon.json entries like:
{
"max-concurrent-downloads": 1
}
I know this is a very often asked question. But none of the solutions I found helped me.
Status:
Windows 7 + VirtualBox + Docker Toolbox
The Docker env worked perfectly for month. Now I didnt use it for a month and now docker-machine start get stuck for waiting for IP. ... Maybe I broke something with Putty or ssh cmd line tool??
It worked perfectly before.
I uninstalled and reinstalled all tools (Vbox, docker, antivirus, firewall...)
tried create with --native-ssh & -d virtualbox
deleted .docker & AppData/.docker folders
tried diffrent memory & ethernet settings on Vbox machines
the machines starts successfully on Vbox
-It just dont works on commandline!
C:\Users\gregor\dev>docker-machine env
Error checking TLS connection: ssh command error:
command : ip addr show
err : exit status 1
output : command-line: line 0: Bad configuration option: ControlMaster
-But it works on Docker quickstart-MinGW
export DOCKER_TLS_VERIFY="1"
export DOCKER_HOST="tcp://192.168.99.102:2376"
export DOCKER_CERT_PATH="C:\Users\gregor\.docker\machine\machines\default"
export DOCKER_MACHINE_NAME="default"
export COMPOSE_CONVERT_WINDOWS_PATHS="true"
# Run this command to configure your shell:
# eval $("C:\Program Files\Docker Toolbox\docker-machine.exe" env)
It would be cool to work with it. But I need 'docker' and 'docker-machine' on my command line for different scripts.
Have you tried opening up virtualbox; right click the VM, click Close -> Save VM State. then open up docker quick start terminal. That seem to have worked for me.
I just installed docker on a Mac (docker toolbox from here; at least I hope to have it installed correctly), but when following the tutorial and type the following command
docker run hello-world
I get the following error:
docker: Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?.
Did I do something wrong? Do I miss some installation steps? Do I miss something that is 'obvious' to the experts, but not to docker beginners like me?
I don't see anything in the instructions that says anything about a 'docker daemon'...
On the shell it says:
docker is configured to use the default machine with IP aa.bb.cc.d
The version command seems to work:
Docker version 17.07.0-ce, build 8784753
Update:
I tried to start the daemon by using the command
sudo dockerd
but all I got was
sudo: dockerd: command not found
Correction: The command works, but only in the sell that opened magically during the installation. The command does not work in any other shell. But when I have to close the shell/restart the computer - what to do then? How to 'start docker???
Maybe there is a tutorial that is complete and working and explains why I need a docker-deacon, how to start it, how to start a docker image or whatever, including the complete terminology for beginners?
Docker Toolbox runs a virtual linux machine on which the docker-daemon runs. To control the virtual machine, you use the docker-machine command. For example docker-machine start to start the machine after you reboot your computer, or docker-machine stop to shut it down.
There is also the docker-machine env command which will set the environment variables needed for docker to work. Check the bottom line of it's output, it shows you how to run the command correctly to set the environment variables. Should be exec $(docker-machine env) on Mac if I'm correct. You need to set the environment variables in each shell in which you want to use docker commands.
Docker for mac starts a linux virtual machine in the background which contains the actual docker stuff. When you start a normal terminal, the terminal is not connected to the vm to execute the docker commands.
The docker quick start terminal is the one that you need to use. This terminal will execute the commands on the VM that is running in the background.
With docker toolbox, if you don't launch your terminal from the docker menu, you'll need to configure your environment separately:
eval "$(docker-machine env default)"
I want to use the third-party's images and book says that I should add the configuration
--insecure-registry=hub.ghostcloud.cn
to Docker_OPTS under /etc/default/docker.
I am using the windows7 64bit and docker is installed by using docker toolbox. But I cannot find the /etc/default/docker file.
So where is the file's directroy? And how can I set the Docker_OPTS to use third-party's images on windows? Thank you.
In Windows, Docker runs inside a VM. So, you have to ssh into the VM and make the changes. To ssh into the VM (assuming default is the VM name you have created using Docker toolbox), enter the following command in the Docker Quickstart Terminal,
docker-machine ssh default
Once you ssh into the VM, then look into the file /var/lib/boot2docker/profile, and you will find the "DOCKER_OPTS=...". Just add --insecure-registry=hub.ghostcloud.cn to that. You are all set.
In case, if you have trouble in using cd command to enter into /var/lib/boot2docker directory, you may want change yourself as a sudo user. Execute the following command,
sudo -i
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I am trying to use Docker on a windows machine and is hit with every possible issue it seems. My latest one is this:
My machine is running but I can't seem to interact with it using the docker commands. If I run a very standard command like:
docker ps
I get an error message like this:
An error occurred trying to connect: Get http://%2F%2F.%2Fpipe%2Fdocker_engine/v
1.23/containers/json: open //./pipe/docker_engine: The system cannot find the file specified.
So apparently some path is all messed up. Do anyone know which path this is and how to fix this?
Edit (2021) - This answer is for the old Docker Toolbox, not Docker Desktop.
When running docker ps and receiving:
An error occurred trying to connect: Get http://%2F%2F.%2Fpipe%2Fdocker_engine/v1.24/containers/json: open //./pipe/docker_engine: The system cannot find the file specified.
The following environment properties need to be set:
set DOCKER_CERT_PATH=%USERPROFILE%\.docker\machine\machines\default
set DOCKER_HOST=tcp://192.168.99.100:2376
set DOCKER_MACHINE_NAME=default
set DOCKER_TLS_VERIFY=1
This is assuming the %USERPROFILE%\.docker\machine\machines\default is default path where the cert.pem, key.pem, ca-key.pem, and ca.pem docker files are; the virtual machine name's (created by docker-machine create) is default and Virtual Box DHCP Server's lower bound (found under VirtualBox->File->Preferences->Network->Host-only Networks->hover mouse on VirtualBox Host-Only Ethernet Adapter) is 192.168.99.100 and no other VM is running in VirtualBox.
Same issue here on Win 7. Solution:
In the Docker Quickstart window, at the $ prompt run the below line:
your_user#your_machine MINGW64 ~
$ eval $("C:\Program Files\Docker Toolbox\docker-machine.exe" env default)
Then, you'll be able to run "docker run hello-world".
I run into this problem when using docker-machine and I haven't run the docker-machine env command after rebooting. I'm not sure how to do this in cmd.exe, but if you're using powershell try issuing this command:
docker-machine env --shell=powershell | Invoke-Expression
Make sure Hyper-V is up and running:
open elevated command prompt
type bcdedit /set hypervisorlaunchtype auto
reboot
run "Docker for Windows"
I had to deal with the same issue on Windows.
To solve it:
Create a docker machine (only if you have not got one)
docker-machine create default
Get the ENV vars which the docker client needs in order to connect to the docker machine (server) [This you will need to do every time or set in your ENV vars]
docker-machine.exe env default
You can either install them manually or run one of the following depending on your shell environment (cmd, bash, power-shell)
docker-machine env --shell=cmd # you need to run it manually
docker-machine env --shell=bash > env-var-commands-tmp && . env-var-commands-tmp && rm env-var-commands-tmp
docker-machine env --shell=powershell | Invoke-Expression
Open cmd with admin rights.
Execute following command
docker-machine env --shell cmd default
you will receive following output
SET DOCKER_TLS_VERIFY=1
SET DOCKER_HOST=tcp://192.168.99.102:2376
SET DOCKER_CERT_PATH=C:\Users\DBashyal.docker\machine\machines\default
SET DOCKER_MACHINE_NAME=default
REM Run this command to configure your shell:
REM #FOR /f "tokens=*" %i IN ('docker-machine env --shell cmd default') DO #%i
Copy the highlighted line and execute on cmd
#FOR /f "tokens=*" %i IN ('docker-machine env --shell cmd default') DO #%i
Execute following command
docker ps
I created a new machine using the below command
docker-machine create --driver=virtualbox vbox-test
Then executed the command
docker-machine env --shell=powershell | Invoke-Expression
Got it Working...
I had a look at all the above answers and none of them worked.
Then I found out that the command has to be run on a linux command line like bash.
so try:
Type the command into the Docker bash terminal VM that comes with the docker toolbox as opposed to the windows cmd
If you have already made sure that your docker has been started
As pointed in other answers you need to set a few environment variables.
The easiest way to do it is:
#FOR /f "tokens=*" %i IN ('docker-machine env --shell cmd') DO #%i
This will run docker-machine env --shell cmd and add those environmental variables.
If you want these variables to be persistent defined them in windows (tutorial).
Right click the Docker icon in the tray a select "Switch to Windows containers...".
You may be prompted to enable the Containers feature. Do so and reboot, again.
To start default host in windows I know three ways given below you can use one of them.
Starting or restarting already created a default machine by the Docker:
docker-machine start default
docker-machine restart default
Now check docker-machine env
The following environment properties need to be set:
set DOCKER_CERT_PATH=%USERPROFILE%\.docker\machine\machines\default
set DOCKER_HOST=tcp://192.168.99.100:2376
set DOCKER_MACHINE_NAME=default
set DOCKER_TLS_VERIFY=1
To create a new machine using the following command:
Windows 10/HyperV:
docker-machine create --driver hyperv default
docker-machine create -d hyperv default
Mac, Linux, windows 7 & 8:
docker-machine create --driver virtualbox default
docker-machine create -d virtualbox default
I had similar issue when I installed Docker CE for Windows Version 17.11.0-ce-rc4-win39 (14244) Channel: edge e557194 on Windows 10.
In Command/cmd windows, when I tried to run commands docker ps, docker version, docker info, the I got error like “error during connect: Get http://%2F%2F.%2Fpipe%2Fdocker_engine/v1.34/version” every time.
To resolved this issue,
I made “Hyper-V” off (Unchecked) from “Turn Windows feature on or off”, which required the OS to be restarted.
And after first restart, I made “Hyper-V” On (Checked), which again required the OS to be restarted.
After second restart, above docker commands started working and giving proper output.
So, turning Hyper-V off and then on resolved this issue for me.
I got the solution from this issue. It not just like Nikesh's answer said SwitchDaemon could fix it directly. I think you should run this command twice to switch your daemon to your previous daemon.
cd "C:\Program Files\Docker\Docker"
./DockerCli.exe -SwitchDaemon
# then check the docker OS/Arch
docker version
# You may see the different OS/Arch
./DockerCli.exe -SwitchDaemon
# then you got your images and containers back
This command is just switch your daemon from your defualt daemon to another daemon(depends on what you set). When you switch to another daemon, the images and containers on the former daemon will disappear(but not deleted).
I have had this issue on a Windows 2016 machine. Happened because the docker service wasn't started. In my case the docker service as failing with the following error
fatal: Error starting daemon: pid file found, ensure docker is not running or delete C:\ProgramData\docker.pid
Deleting the C:\ProgramData\docker.pid file did the trick.
below resolved. i copied answer from another forum
I had this problem after update. After re-installing VB I switched on "VirtualBox NDIS6 Bridged Networking Driver" in properties network connection.
It property switched off default in my case.
Windows 10 Professional
For me the Docker service was running but Docker still needed to be 'started'. That is, I had the setting 'Start Docker when you log in' unchecked in the Docker tray icon.
Prior to finding this out I had gone to the program folder Docker and clicked 'Docker for Windows'. After a short time the message 'Docker is running' was displayed.
For me, this error was resolved after I removed daemon.json file in "%programdata%\docker\config"
The content in my daemon.json is the following:
{
"hosts": ["tcp://0.0.0.0:2375"]
}
I created this manually as part of some testing. But after I restarted the server, I started to get the error in this question.
The error is really troubling. I hope Docker Developers do something about. It took a lot of try and error to get around. Thanks to Stackoverflow and other blogs. In my case, I am using Windows 10 Pro. I settled with DockerToolbox.exe after several failed attempts with Docker for Windows Installer.exe. Then I encountered An error occurred trying to connect: Get http://%2F%2F.%2Fpipe%2Fdocker_engine/v . The followed these steps and the problem got solved.
First, I went to Control Panel -> Turn Windows Features On or Off and unchecked Hyper-V
Next, Open PowerShell as Admin:
docker-machine env --shell=powershell | Invoke-Expression
type bcdedit /set hypervisorlaunchtype auto
Restarted my System. Then I launched "Docker Quickstart Terminal", then I entered this on the shell window.
run "Docker for Windows"
docker run hello-world
I it went well. Then I open Command Prompt
docker run hello-world
It gave the error: Then I entered
set DOCKER_CERT_PATH=%USERPROFILE%\.docker\machine\machines\default
set DOCKER_HOST=tcp://192.168.99.100:2376
set DOCKER_MACHINE_NAME=default
set DOCKER_TLS_VERIFY=1
Most of the suggestions above too are helpful.
I saw this error message after a weekend. My setup was fine before that. My config and connections looked correct. $docker-machine restart default fixed it for me on Windows 7
I was getting this error, while running the command docker-compose up. The problem for me was, the docker service was not running. So I had to run services.msc and start the docker service.
I solved this error by run the {DOCKER_TOOLBOX_INSTALL_PATH}start.sh in bash.
In my case, all above solutions did not resolve. Instead zilurrane response helped.
cd "C:\Program Files\Docker\Docker"
./DockerCli.exe -SwitchDaemon
Switch to Windows Containers
docker info
docker ps
Switch back to Linux containers
docker info
Viola!
The windows switch likely runs the missing configurations that Linux also needs.
I was having similar issue. For me I hadn't logged in to docker from the status bar. What I did was to login to docker from status bar. Once I logged in I was able to run all the commands properly.
Try logging in using your docker id and password maybe that will resolve your issue.
I had the same issue on my Windows 10. Find below what I did to solve it:
After installing Docker, Just restart your PC, run docker application (It may require enabling Hyper-V), then open command line and type:
docker run hello-world
Everything works fine :)
I had this problem. I searched a lot. I checked many things. But in the end, the solution that solved my problem was the following solution.
System Environment:
Windows 10 Professional
Windows engine in Docker
Docker version 20.10.21
Solution
disabled IP6
And
Restarted the service and application