lookup registry-1.docker.io: no such host

Question

I have docker daemon running on my Ubuntu 16.4 server

my server details:

No LSB modules are available. Distributor ID: Ubuntu Description:

Answer 1

I solve the error changing DNS server by 8.8.8.8 - Ubuntu 18.04.3 LTS

1- Open the Ubuntu System Settings and Navigate to Network

2- Click the on the setting button next to the Network name in the list to which you are connected.

3- New Window will open with a lot number of tabs, with one of them with the label of “IPv4”.

4- Upon opening the “IPv4” Tab you will find a Field of “DNS”. Here you can write the DNS server

If you want to use more than one DNS, then you can enter and separate them with a comma.

Answer 2

Simplified detailed solution in case you are having this problem in windows is as below: right click on network open network and internet setting In advanced network setting, click on change adapter options right click on your network or wifi connection click on properties in Networking tab click on Internet protocal version 4 (TCP/IPv4) or ipv6 In general, click on use the following DNS server address and add 8.8.8.8 on preferred DNS server

Answer 3

Go to Docker Settings -> Proxies -> Manual proxy configuration.

Set the proxy details in the input and apply.

Restart the docker. This will fix the issue.

Answer 4

Things you can try:

a) Add nameserver 8.8.8.8

Method #1

docker-machine ssh default
sudo vi /etc/resolv.conf
//change nameserver to 8.8.8.8

Then restart the server using

service docker restart

Note: If you don't have docker-machine installed, you can follow instructions here to install it. It comes with Windows and Mac but is available for install on Linux manually.

Method #2

Edit /etc/docker/daemon.json Or "provide a JSON configuration in the preference panel" with the following information:

{ "dns" : [ "8.8.8.8", "8.8.4.4" ]}

Then restart the server using

service docker restart

b) Setup Proxy

Method #1

Edit your proxy configuration as Tarun Lalwani suggested.

Edit /etc/default/docker and add:

export http_proxy='http://username:password@proxy-host:proxy-port'
export https_proxy='https://username:password@proxy-host:proxy-port'

Then restart the server using

service docker restart

Method #2

Source: https://github.com/moby/moby/issues/32270#issuecomment-340709035

1. Create a systemd drop-in directory for the docker service:

   mkdir -p /etc/systemd/system/docker.service.d
   # For HTTP Proxy:
   vim /etc/systemd/system/docker.service.d/http-proxy.conf
   # For HTTPS Proxy:
   vim /etc/systemd/system/docker.service.d/https-proxy.conf
   

2. Then add below content with proxy settings with it (Change to "HTTPS" for https)

   [Service]
   Environment="HTTP_PROXY=http://<allowed_proxy_ipv4_address>:<proxy_port_num>/"
   [Service]
   

3. sudo systemctl daemon-reload

4. sudo systemctl restart docker
5. Verify that the configuration has been loaded: systemctl show --property=Environment docker

c) Reinstall Docker

Unfortunately the last resort, could work. Check out these github pages for more suggestions:

• https://github.com/moby/moby/issues/32270
• https://github.com/docker/for-mac/issues/1317

For me, setting up the proxy using the systemctl method was the only thing that worked.

Answer 5

I bumped into this error and was able to resolve by a simple restart:

sudo service docker restart

Answer 6

You need to set the proxy for Docker daemon also using environment variable. Docker run is also doing docker pull since the image doesn't exists. In your case the proxy is only applied to the docker run command, which delegates to the docker daemon which is running without proxy.

Create a file named /etc/systemd/system/docker.service.d/10_docker_proxy.conf with below content

[Service]
Environment=HTTP_PROXY=http://1.1.1.1:111
Environment=HTTPS_PROXY=http://1.1.1.1:111

Make sure to update the proxy as per the ones you have 1.1.1.1:111 is just an example

Then execute below commands to restart docker

sudo systemctl daemon-reload
sudo systemctl restart docker

Now use your docker run command and it should work