I'm new to docker.My Operating system is Mac OS.
I follow the step from docker website,
Download the boot2docker and install it.
run the boot2docker
$ boot2docker init
$ boot2docker start
$ docker run hello-world
the result is that :
bash-3.2$ docker run hello-world
An error occurred trying to connect: Post https://192.168.59.103:2376/v1.19/containers/create: x509: certificate is valid for 127.0.0.1, 10.0.2.15, not 192.168.59.103
then i do
$ boot2docker shellinit to display the environment variables
bash-3.2$ boot2docker shellinit
Writing /Users/wangyao/.boot2docker/certs/boot2docker-vm/ca.pem
Writing /Users/wangyao/.boot2docker/certs/boot2docker-vm/cert.pem
Writing /Users/wangyao/.boot2docker/certs/boot2docker-vm/key.pem
Your environment variables are already set correctly.
maybe I think it makes error by not configuring the variables, So I do this
export DOCKER_HOST=tcp://192.168.59.103:2376
export DOCKER_CERT_PATH=/Users/wangyao/.boot2docker/certs/boot2docker-vm
export DOCKER_TLS_VERIFY=1
then I $ boot2docker shellinit, and the result is no different,
Please tell me how to resolve it
I explained how to use Docker Machine instead of boot2docker, if you're interested: Can't run docker on os X with boot2docker.
Because I think Boot2Docker won't be the recommended way of using Docker (on Windows/OS X) any longer soon.
TL;DR
docker-machine create -d virtualbox dev
eval "$(docker-machine env dev)"
docker run hello-world
Related
When I was using Docker Toolbox, I could just run docker-machine env to print all of the current environment variables.
With Docker for Windows, it assumes a cert path of
%USERPROFILE%\.docker\machine\certs
Unless you specify the environment variable
DOCKER_CERT_PATH
If you're switching from Docker Toolbox to Docker for Windows, you might need to remove this environment variable to get things working.
In Windows 10, you can use the command docker-machine env.
Docker deployment in Windows:
The Docker running on Windows 10 will be launched as a virtual machine.
So, when you set IDE env, please see below.
API_URL:
Docker for macOS or Linux: unix:///var/run/docker.sock
Docker Toolbox for Windows or macOS: https://192.168.99.100:2376
Docker certificates folder, in Windows:
$ docker-machine env
export DOCKER_TLS_VERIFY="1"
export DOCKER_HOST="tcp://192.168.99.100:2376"
export DOCKER_CERT_PATH="C:\Users\your_id\.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)
But in case of docker for windows, there is no docker machine
Still, with docker-machine, you can create a machine with the hyperv driver. (see docker-machine drivers)
See "Microsoft Hyper-V"
There are issues in progress though, like issue 779
DOCKER_CERT_PATH should be C:\Users\<login>\machine\machines\<machinename>
My Docker service is up and running. However when attempting to use Docker by running it with sudo, e.g.:
12:40:26/~ $ sudo docker pull fluxcapacitor/pipeline
Using default tag: latest
I have got the following error:
Warning: failed to get default registry endpoint from daemon (Cannot connect to
the Docker daemon. Is the docker daemon running on this host?). Using system
default: https://index.docker.io/v1/
Cannot connect to the Docker daemon. Is the docker daemon running on this host?
Note that I had already followed the answers on Mac OS X sudo docker Cannot connect to the Docker daemon. Is the docker daemon running on this host?
as follows:
docker-machine start default
12:40:36/~ $ docker-machine start default
Starting "default"...
Machine "default" is already running.
docker ps
12:41:20/~ $ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
So what more needs to be done?
This is:
$ docker --version
Docker version 1.11.2, build b9f10c9
on El Capitan.
Output of docker-machine env default
$ eval "$(docker-machine env default)"
$ docker-machine env default
export DOCKER_TLS_VERIFY="1"
export DOCKER_HOST="tcp://192.168.99.100:2376"
export DOCKER_CERT_PATH="/Users/macuser/.docker/machine/machines/default"
export DOCKER_MACHINE_NAME="default"
The following command exports a few environment variables that the subsequent docker commands use:
eval "$(docker-machine env default)"
However, if you launch docker with sudo, the exported environment variables are not accessible by the docker executable. You could potentially get it to work by passing -E flag to sudo, e.g.:
sudo -E docker pull fluxcapacitor/pipeline
But much easier option is to use docker without root like:
docker pull fluxcapacitor/pipeline
You have to set environment variables with:
eval "$(docker-machine env default)"
More about it here.
I had same probelem on my MAC, when attempted
# eval "$(docker-machine env default)"
got this error
Error checking TLS connection: Error checking and/or regenerating the certs: There was an error validating certificates for host "192.168.99.100:2376": x509: certificate is valid for 192.168.99.101, not 192.168.99.100
You can attempt to regenerate them using 'docker-machine regenerate-certs [name]'.
to regenerate certificates, find out the docker-machines available;
# docker-machine ls
Output of avalable docker machines (omitted others)
NAME ACTIVE DRIVER STATE URL SWARM DOCKER ERRORS
default - virtualbox Running tcp://192.168.99.100:2376 Unknown Unable to query docker version: Get https://192.168.99.100:2376/v1.15/version: x509: certificate is valid for 192.168.99.101, not 192.168.99.100
Generate certificates for this default docker-machine
# docker-machine regenerate-certs default
and then setup docker-machine env to default docker-machine;
# eval "$(docker-machine env default)"
and it works normally after that.
I have also tried the same but did not work.
later I have tried these steps on AWS CLI
$ sudo nano /etc/docker/daemon.json
{
"dns": ["8.8.8.8", "8.8.4.4"]
}
$ sudo service docker restart
$ docker pull hello-world
I installed docker and there seems to be some issue.
$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
$sudo docker ps
Cannot connect to the Docker daemon. Is the docker daemon running on this host?
What should I do?
You need to set up your shell to use Docker:
eval $(docker-machine env default)
Where does this command come from? Run docker-machine env default and you'll see something like the following:
$ docker-machine env default
export DOCKER_TLS_VERIFY="1"
export DOCKER_HOST="tcp://192.168.99.100:2376"
export DOCKER_CERT_PATH="/Users/eric/.docker/machine/machines/default"
export DOCKER_MACHINE_NAME="default"
# Run this command to configure your shell:
# eval $(docker-machine env default)
Also you may or may not have to simply start the Docker host beforehand via:
docker-machine start default
docker-machine is a legacy stuff for OSX that operates with VirtualBox. What you should do is get rid of it completely, and then you should download the latest version of docker, that is called Docker for Mac
Make sure, you remove the legacy docker, and the docker-machine from your Mac before installing Docker for Mac. If you do not do that, the legacy docker binary will be favoured after the installation, and you will still get the error message, which says that cannot connect to the Docker daemon.
I had this same issue I solved it in the following steps:
docker-machine restart
Quit terminal (or iTerm2, etc, etc) and restart
eval $(docker-machine env default)
I just had this problem. I was using the old docker-machine and I switched to the latest docker for mac. Running eval $(docker-machine env default)
sets up some environment variables.
To solve my problem, I unset those environment variables...
unset DOCKER_HOST DOCKER_MACHINE_NAME DOCKER_TLS_VERIFY DOCKER_CERT_PATH
if you are using docker toolbox, type this before running the docker ps command to set the environment
docker-machine env default
to have it persistent on new terminals & reboot put it to the bash_profile file
echo "eval \$(docker-machine env default)" >> ~/.bash_profile
remove the export DOCKER_HOST.... from your environment (.bashrc, .bash_profile what have you), restart shell/terminal, worked for me.
Install docker desktop if not installed. (https://docs.docker.com/desktop/install/mac-install/)
Run docker desktop. This will make docker running in the background.
Use docker ps and it will work as expected.
Can't install Docker Desktop on MacOSX High Sierra. Suggestions?
I'm new to Docker...
From my understanding, Docker is only compatible with Linux, is it possible to run docker for development purposes on a Mac?
I installed virtualbox using homebrew and have tried to create a virtualbox instance. I installed docker, but am having trouble getting my mac to communicate with the vm docker instance. My end goal is to get a locally debuggable instance of tomcat running on the docker container.
Any help or tips would be helpful.
Information:
Because Docker only runs on Linux you will need to install some kind of virtual instance on your local machine. An easy and popular way to do that is to install
Boot2docker and VirtualBox. VirtualBox is a dependency of Boot2docker. You can download, setup and install the latest versions from their websites or if you are using Homebrew, as you mentioned, you can quickly get the working binaries both in one step.
After installing boot2docker, you're ready to use Boot2docker to create a Tomcat Container. You can find a pre-configured tomcat image by searching Docker's community repository, docker hub registry.
Notes:
Each time you execute the docker run command a new container is created.
The VM running Docker requires a ssh private/public encryption key handshake to connect to. If you follow my steps below, one will be generated for you.
Steps to Setup Tomcat using the tomcat image:
Open Terminal and run this command: brew install boot2docker
Create a new Boot2Docker VM instance using the init command: boot2docker init
Run this command in Terminal to forward local ports to the vm:
for i in {10000..10999}; do VBoxManage modifyvm "boot2docker-vm" --natpf1 "tcp-port$i,tcp,,$i,,$i”; VBoxManage modifyvm "boot2docker-vm" --natpf1 "udp-port$i,udp,,$i,,$i";done
Start the boot2docker daemon: boot2docker start or boot2docker up
After starting docker, copy the exports that are displayed from the previous command to your clipboard
Edit your bash profile file ~/.bash_profile (or if you are using zsh, edit the resource configuration file ~/.zshrc) with a text editor (I prefer using Sublime text): subl .zshrc *note: this will permanently save the docker env variables.
Paste the exports into that file and save
Execute the source command on the file: source .zshrc
Pull the latest tomcat image to create a container and start tomcat: docker run -it --rm -p 10080:8080 tomcat:8.0 *note: this will forward your local 10080 port to the vm's 8080 port.
Go to http://localhost:10080, you should see the tomcat start page!
Useful Docker commands:
$ boot2docker status
$ docker version
$ docker ps #shows running containers
$ docker ps -a # shows all containers
$ docker exec -it NAME /bin/bash #to start a bash session on the container. -i = interactive, -t = tty
External Resources:
https://docs.docker.com/installation/mac/#installation
https://registry.hub.docker.com/_/tomcat/
Most people use boot2docker to run on Macs. You may also want to take a look at Kitematic, which gives you a GUI to play with.
Finally, the future is probably to use docker machine, which can provision a VM for you.
Docker requires Linux Kernel features, hence it cannot be run natively on OSX.
See instead Boot2Docker. This link gives you instructions on how to get going.
I'm new to Docker, using Boot2Docker on OSX. After booting it, this message is given:
To connect the Docker client to the Docker daemon, please set
export DOCKER_HOST=tcp://192.168.59.103:2375
Yet even without it, basic Docker commands (eg, docker run hello-world) work fine.
The install instructions aren't very informative:
Note: If you see a message in the terminal that looks something like this:
To connect the Docker client to the Docker daemon, please set:
export DOCKER_HOST=tcp://192.168.59.103:2375
you can safely set the evironment variable as instructed.
Knowing that it's "safe" doesn't say why it's useful.
What I'm not clear on:
What is the docker "client"?
What is the docker "daemon"?
What is the docker "host"? (The Boot2Docker VM itself?)
Ok, I think I got it.
The client is the docker command installed into OS X.
The host is the Boot2Docker VM.
The daemon is a background service running inside Boot2Docker.
This variable tells the client how to connect to the daemon.
When starting Boot2Docker, the terminal window that pops up already has DOCKER_HOST set, so that's why docker commands work. However, to run Docker commands in other terminal windows, you need to set this variable in those windows.
Failing to set it gives a message like this:
$ docker run hello-world
2014/08/11 11:41:42 Post http:///var/run/docker.sock/v1.13/containers/create:
dial unix /var/run/docker.sock: no such file or directory
One way to fix that would be to simply do this:
$ export DOCKER_HOST=tcp://192.168.59.103:2375
But, as pointed out by others, it's better to do this:
$ $(boot2docker shellinit)
$ docker run hello-world
Hello from Docker. [...]
To spell out this possibly non-intuitive Bash command, running boot2docker shellinit returns a set of Bash commands that set environment variables:
export DOCKER_HOST=tcp://192.168.59.103:2376
export DOCKER_CERT_PATH=/Users/ddavison/.boot2docker/certs/boot2docker-vm
export DOCKER_TLS_VERIFY=1
Hence running $(boot2docker shellinit) generates those commands, and then runs them.
Upon investigation, it's also worth noting that when you want to start using docker in a new terminal window, the correct command is:
$(boot2docker shellinit)
I had tested these commands:
>> docker info
Get http:///var/run/docker.sock/v1.15/info: dial unix /var/run/docker.sock: no such file or directory
>> boot2docker shellinit
Writing /Users/ddavison/.boot2docker/certs/boot2docker-vm/ca.pem
Writing /Users/ddavison/.boot2docker/certs/boot2docker-vm/cert.pem
Writing /Users/ddavison/.boot2docker/certs/boot2docker-vm/key.pem
export DOCKER_HOST=tcp://192.168.59.103:2376
export DOCKER_CERT_PATH=/Users/ddavison/.boot2docker/certs/boot2docker-vm
export DOCKER_TLS_VERIFY=1
>> docker info
Get http:///var/run/docker.sock/v1.15/info: dial unix /var/run/docker.sock: no such file or directory
Notice that docker info returned that same error. however.. when using $(boot2docker shellinit)...
>> $(boot2docker init)
Writing /Users/ddavison/.boot2docker/certs/boot2docker-vm/ca.pem
Writing /Users/ddavison/.boot2docker/certs/boot2docker-vm/cert.pem
Writing /Users/ddavison/.boot2docker/certs/boot2docker-vm/key.pem
>> docker info
Containers: 3
...
It points to the docker host! I followed these steps:
$ boot2docker start
Waiting for VM and Docker daemon to start...
..............................
Started.
To connect the Docker client to the Docker daemon, please set:
export DOCKER_HOST=tcp://192.168.59.103:2375
$ export DOCKER_HOST=tcp://192.168.59.103:2375
$ docker run ubuntu:14.04 /bin/echo 'Hello world'
Unable to find image 'ubuntu:14.04' locally
Pulling repository ubuntu
9cbaf023786c: Download complete
511136ea3c5a: Download complete
97fd97495e49: Download complete
2dcbbf65536c: Download complete
6a459d727ebb: Download complete
8f321fc43180: Download complete
03db2b23cf03: Download complete
Hello world
See:
http://docs.docker.com/userguide/dockerizing/