I am trying to install and run splash on using Windows 10 Home. I have installed docker toolbox, as on windows 10 Home you can't install docker. Then in command prompt when I type
docker pull scrapinghub/splash
I get the error
error during connect: Post http://%2F%2F.%2Fpipe%2Fdocker_engine/v1.40/images/create?fromImage=scrapinghub%2Fsplash&tag=latest: open //./pipe/docker_engine: The system cannot find the file specified. In the default daemon configuration on Windows, the docker client must be run elevated to connect. This error may also indicate that the docker daemon is not running.
One interesting thing I noticed was that if I run Docker Quickstart Terminal I can install splash with the command
docker pull scrapinghub/splash
and then using the command
docker run -p 5023:5023 -p 8050:8050 -p 8051:8051 scrapinghub/splash
it gives me
server listening on http://0.0.0.0:8050
But then when I paste http://0.0.0.0:8050 into Chrome it gives me "This site can't be reached."
Thanks
So 1st error clearly says that your Docker container is not running, so your pull command fails
You can check by running any docker command maybe try this
docker --version
For your 2nd query, you need to use Docker IP, to access the application
You can try docker-machine ip to see, on what IP docker is running (Assuming docker-machine is installed)
Generally, on windows Docker IP is 192.168.99.100
Try these 2
192.168.99.100:8050
or
localhost:8050
I'm having a problem building Docker images on my corporate network. I'm just getting started with Docker, so I have the following Dockerfile for a hello-world type app:
# DOCKER-VERSION 0.3.4
FROM centos:6.4
# Enable EPEL for Node.js
RUN rpm -Uvh http://download.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm
# Install Node.js and npm
RUN yum install -y npm
# Bundle app source
ADD . /src
# Install app dependencies
RUN cd /src; npm install
EXPOSE 8080
CMD ["node", "/src/index.js"]
This works fine when I build it on my laptop at home, on my own wireless network. It pulls down the requisite dependencies and builds the image correctly.
However, when I'm on my corporate network at work, this same docker build fails when trying to pull down the RPM from download.fedoraproject.org, with this error message:
Step 2 : RUN rpm -Uvh http://download.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm
---> Running in e0c26afe9ed5
curl: (5) Couldn't resolve proxy 'some.proxy.address'
error: skipping http://download.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm - transfer failed
On my corporate network, I can access that URL just fine from my laptop. But once Docker is trying to build the container, all of a sudden it can't resolve at all. This behavior is the same for a variety of external resources (apt-get, etc.): They all can resolve just fine on my laptop on the corporate network, but Docker can't resolve them.
I don't have the network know-how to figure out what's going on here. Does anyone know why this strange behaviour would be occurring when building Docker containers?
I was able to figure out the issue. On Ubuntu, Docker sets the DNS servers for container to Google's servers at 8.8.8.x. As I understand it, this is a workaround on Ubuntu due to the fact that Ubuntu sets /etc/resolv.conf to be 127.0.0.1.
Those Google servers weren't accessible from behind our firewall, which is why we couldn't resolve any URLs.
The fix is to tell Docker which DNS servers to use. This fix depends on how you installed Docker:
Ubuntu Package
If you have the Ubuntu package installed, edit /etc/default/docker and add the following line:
DOCKER_OPTS="--dns <your_dns_server_1> --dns <your_dns_server_2>"
You can add as many DNS servers as you want to this config. Once you've edited this file you'll want to restart your Docker service:
sudo service docker restart
Binaries
If you've installed Docker via the binaries method (i.e. no package), then you set the DNS servers when you start the Docker daemon:
sudo docker -d -D --dns <your_dns_server_1> --dns <your_dns_server_2> &
I advise changing the DNS settings of the Docker daemon. You can set the default options for the docker daemon by creating a daemon configuration file at /etc/docker/daemon.json. Set DNS server according to your host machine, e.g. my DNS server is 10.0.0.2:
{"dns": ["10.0.0.2", "8.8.8.8"] }
Then you need just restart docker service:
sudo service docker restart
Step-by-step explanation is available here Fix Docker's networking DNS config
The following steps works for me ( for both docker build and docker run command). My linux version is Ubuntu 14.04.
Identify DNS using following command.
nm-tool | grep DNS
This result DNS:192.168.1.1 in my case
Create entry in /etc/default/docker.io. My current entry looks like this
DOCKER_OPTS="--dns 8.8.8.8 --dns 8.8.4.4 --dns 192.168.1.1"
Restart docker service
sudo service docker.io restart
For any Linux distribution working with SystemD (Ubuntu 16, RHEL 7...), the path will be displayed with the following command:
$ systemctl status docker
● docker.service - Docker Application Container Engine
Loaded: loaded (/lib/systemd/system/docker.service; enabled; vendor preset: enabled)
Active: active (running) since Wed 2016-06-29 08:10:33 PDT; 2min 34s ago
Docs: https://docs.docker.com
Main PID: 1169 (dockerd)
Tasks: 19
Memory: 85.0M
CPU: 1.779s
CGroup: /system.slice/docker.service
├─1169 /usr/bin/dockerd --dns 172.18.20.11 --dns 172.20.100.15 --dns 8.8.8.8 --dns 8.8.4.4 -H fd://
└─1232 docker-containerd -l unix:///var/run/docker/libcontainerd/docker-containerd.sock --shim docker-containerd-shim --met
The path would be /lib/systemd/system/docker.service. Add the DOCKER_OPTS values, which can have any of the --dns, in the line where the daemon is started.
cat /lib/systemd/system/docker.service | grep dns
ExecStart=/usr/bin/dockerd --dns 172.18.20.11 --dns 172.20.100.15 --dns 8.8.8.8 --dns 8.8.4.4 -H fd://
Docker (at least >=1.13, probably earlier) on Mac and Windows allow you configure the DNS in Preferences -> Daemon -> Advanced:
The following config sets two corporate DNS servers (use your own values here) with fallback to Google public DNS servers.
Specify your DNS to the Docker daemon.
First of all get your DNS address
$ nmcli dev show | grep 'IP4.DNS'
IP4.DNS[1]: 10.0.0.2
Test if the problem is really with the DNS by launching a docker container forcing this new DNS
$ docker run --dns 10.0.0.2 <image_name> <command_name>
If this solves the problem, you can apply this fix for all the docker daemons in the following way
Edit or create a file /etc/docker/daemon.json
Add the following line to this file
{
"dns": ["10.0.0.2", "8.8.8.8"]
}
Restart docker
$ sudo service docker restart
A very nice guide for doing ALL this process can be found here.
https://development.robinwinslow.uk/2016/06/23/fix-docker-networking-dns/
Solution without restarting Docker service
It is possible to modify the DNS settings for a single Docker image without affecting other docker build calls (and without restarting the Docker service) by overriding the resolv.conf at build time:
FROM ubuntu:18.04
RUN echo "nameserver 123.123.123.123" > /etc/resolv.conf && apt update
Replace the IP 123.123.123.123 with the one which is used within your corporate network (use nmcli dev show | grep 'IP4.DNS' to get the currently used DNS server).
Downsides:
This does not affect any other line from the Dockerfile. Hence, you have to prefix every line with the fix, if it depends on DNS resolution
On my Ubuntu 16.04 machine, sometimes, Google's DNS do not work for building Docker images.
cat /etc/docker/daemon.json
{"dns": [""8.8.8.8"] }
I have to manually find out my Service Providers DNS using the following command
nmcli device show <interfacename> | grep IP4.DNS
125.22.47.102
and add it to my daemon.json as show below
cat /etc/docker/daemon.json
{"dns": ["125.22.47.102","8.8.8.8"] }
restart docker
sudo service docker restart
(PS nm-tool is deprecated from Ubuntu 15.04)
Updated info September 2021
Inspired by Jason's answer; setting DNS server in the JSON didn't work for me in the current version, but there's now another place to set it:
When you turn on the toggle, the 8.8.8.8 is already there, so I just left it and it works well enough for me in my dev environment. I didn't research it but if wanted, there may be a way to add a list, perhaps separated by commas/semicolons/spaces etc.
Below are the steps I followed:
Access Linux server using putty from Windows 7
Run docker run -d -P -p 4545:4444 --name standalone_grid selenium/standalone-chrome on Linux
Launch chrome browser on windows and try to access
http://<linux_server_ip>:4545. Error site can't be reached. This server also has Jenkins installed which can be accessed at http://<linux_server_ip>:8080
How can I fix this? Am I doing anything wrong?
docker ps out put
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
60422c2cd9b1 selenium/standalone-chrome "/opt/bin/entry_poin…" About an hour ago Up About an hour 0.0.0.0:4545->4444/tcp standalone_grid
As mentioned in the comments first thing you want to check if the container is up:
docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
b7a560331584 selenium/standalone-chrome "/opt/bin/entry_poin…" 2 minutes ago Up 2 minutes 0.0.0.0:4545->4444/tcp standalone_grid
Next step would be just to verify locally is it working from the Linux console:
curl http://<linux_server_ip>:4545
If this works you already know it is a networking issue. Please check your local iptables rules:
sudo iptables -L INPUT
to see if there are any restrictions for incoming connections. If this is empty the the issue lays in connectivity within the network itself. You can try to workaround it by using a Putty ssh tunnel.
EDIT:
The issue was related to port 4545, using a different port resolved the problem.
I'm new to Docker so please be kind but I am testing it out on a Windows 10 image on Azure (I know I could run it directly but I wanted to try it in a VM first).
I have a fresh Windows 10 image that I have installed Docker for Windows 2.0.0 on.
Note: I did not tick the option to use Windows containers instead of linux containers.
Once it installed (and rebooted) I was prompted to install Hyper-V and Containers features (causing restarts).
Once it was all installed I open an Administrative PowerShell window to download Jenkins:
docker run -p 8080:8080 -p 50000:50000 -v jenkins_home:/var/jenkins_home jenkins/jenkins:lts
This gave me the error:
C:\Program Files\Docker\Docker\Resources\bin\docker.exe: Error response from daemon: driver failed programming external connectivity on endpoint goofy_lederberg (deaba2deeea0486c92ba8a1a32740295f03859b1b5829d39e39eff0b24613ebf): Error starting userland proxy: Bind for 0.0.0.0:50000: unexpected error Permission denied.
I thought this was strange as 50000 wasn't a port that I expected to be in use, changing this to different ports (50001) produced the same error.
Running:
netstat -a -n -o
Showed that the port was not in use.
If I remove -p 50000:50000 from the command it can bind and start Jenkins but I assume it needs this port mapping to work correctly.
Previous posts have suggested stopping the World Wide Web Publishing service but that isn't installed.
There are no other running Docker containers.
I assume the port is in use or something is stopping the port mapping.
Assuming a user has permission to create a port binding from their terminal are there any other techniques beside netstat to determine if something is bound to a port - either something internal to docker's own checking process or something at the host OS level?
Rather embarrassingly this worked this morning with no changes other than the VM was shutdown over the weekend.
Maybe all it needed was a reboot?
I am trying to use the Docker Remote API on a Windows 10 host machine. I am using Chrome's Postman extension to see if I can get results from the docker remote api's endpoints. Here are the endpoints that I've tried:
GET http://192.168.99.100:4243/images/json
GET http://192.168.99.100:2376/images/json
Both returned Connection to server 192.168.99.100 failed (The server is not responding)
After a few searches I found out that the Docker Remote API is not enabled by default on Windows. Most of the guides are for Ubuntu but I have found this particular one for Windows.
These are the steps that I performed on my machine
docker-machine ssh
cd /var/lib/boot2docker
sudo vi profile
Change DOCKER_HOST='H tcp://0.0.0.2376' to DOCKER_HOST='H tcp://0.0.0.2375'
change DOCKER_TLS=auto to DOCKER_TLS=no
export DOCKER_HOST='-H tcp://0.0.0.2375'
export DOCKER_TLS_VERIFY=0
env | grep DOCKER
docker-machine restart
docker-machine env
docker-machine regenerate-certs
After performing the steps above, I did try again the endpoints on Postman but I still get the same result.
Can you perhaps give a little help if I have missed a step? Or am I on track?
Also, to answer some of my queries.
Is the docker remote api port for Windows 2375 and 4243 for Linux?
Is DOCKER_HOST for Windows and DOCKER_OPTS for Linux?
Switch your docker to windows container
Got to C:\ProgramData\Docker\config
in deamon.json file
add "hosts": ["tcp://0.0.0.0:2376", "npipe://"]
restart docker.
give command : docker -H tcp://0.0.0.0:2376 ps
The Remote API is now enabled by default on Windows (see ticket here).
It is reachable at http:\\localhost:2375 indeed (tested it).
I faced the same issue and found a quick solution for this. Just open docker settings and enable "Expose daemon on TCP..." checkbox. Docker will start automatically and the problem should be solved.Please find the image attached for reference
using docker desktop, go to settings and check "Expose daemon on tcp://localhost:2375 without TLS"