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Ubuntu Server Docker Image

FAQ on the LTS Docker Image Portfolio

Are these Official Images on Docker Hub?

Ubuntu

Systemctl enable docker. Docker installed on ubuntu 16.04 server, check it using the command below. And you will get the docker version 1.x installed on the system. Step 2 - Install and Configure Portainer. Portainer can be installed as a docker container and standalone without docker container. This is the command to install the Docker image on Linux box. The Docker details for the various versions of CentOS. Step 8 − On Ubuntu box, run the command. Sudo docker pull centos:latest The download of the Docker component starts and the CentOS Docker is downloaded. The name of the Docker image is centos:latest, which means that we have.

Several images from the Canonical LTS Docker Image Portfolio are free Docker Official Image versions during their five year standard security maintenance period.

The actual process of getting Docker installed in Ubuntu Server is two commands away. Ubuntu makes Docker available as an installation option in the default package manager that ships with Ubuntu known as apt. In the SSH terminal window of VS Code, run the following two commands to install Docker: sudo apt update -y sudo apt install docker.io -y. In our example, we are going to use the Apache Web Server on Ubuntu to build our image. Let’s follow the steps given below, to build our web server Docker file. Step 1 − The first step is to build our Docker File. Let’s use vim and create a Docker File with the following information. To quit just kill docker on the terminal. And to restart the machine: docker start ubvnc. And then reconnect with VNC. Then to quit the machine: docker stop ubvnc. You have to wait a few seconds for the VNC server on the guest to start before you can connect. Chromium inside the guest won't start from the menu.

Is the LTS Docker Image Portfolio a free or a commercial offering?

Both. Some LTS Docker Images have a free five year maintenance period, based on the underlying Ubuntu LTS free standard security maintenance period. All LTS Images receive Extended Security Maintenance from Canonical and during that period are available to existing Canonical customers only, through Docker Hub. As with Ubuntu interim releases, ongoing development images are released regularly and receive free security updates while they are the current version.

Where are the images?

On Amazon ECR Public and Docker Hub, images are provided in three groups:

  • Ubuntu on Docker Hub and ECR Public have development releases with security updates
  • LTS ('Canonical') on ECR Public has Free LTS images with up to five years fixes
  • Customer-only content with up to ten years of fixes. Contact us.

All of our Docker Hub repositories are exempted from per-user rate limits.

Is there a long-term commitment? How long?

LTS Images are security-maintained for the full ten year period of their underlying Ubuntu LTS release. Some applications will have versions on multiple Ubuntu LTS versions. In each case, the image is maintained for the full life of the underlying Ubuntu LTS.

Can I use these images to build other applications?

Ubuntu Server Docker Image

Yes. Our hardened images are optimised for the developer experience, layering, and minimality. Each image is engineered to be clean, without layering artifacts, making it an ideal foundation for enterprise continuous integration and golden images. If you are an ISV, Canonical can offer embedded terms for redistribution and specific support. Get in touch.

Recently, I installed Docker on Ubuntu. It was super easy. But when I tried to run a docker command, it threw this error at me:

It’s not that I am trying to run something special. It happens for basic docker command like ps as well.

Full

Strange, isn’t it? Let me show you how to get past this annoying error.

Fixing ‘Got permission denied while trying to connect to the Docker daemon socket’ error with Docker in Ubuntu

There are two ways to deal with it.

Fix 1: Run all the docker commands with sudo

If you have sudo access on your system, you may run each docker command with sudo and you won’t see this ‘Got permission denied while trying to connect to the Docker daemon socket’ anymore.

But running each and every docker command with sudo is super inconvenient. You miss adding sudo to the beginning and you’ll get ‘permission denied’ error again.

Fix 2: Running docker commands without sudo

To run the docker commands without sudo, you can add your user account (or the account you are trying to fix this problem for) to the docker group.

First, create the docker group using groupadd command. The group may already exist but running the group creation command won’t hurt.

Now that you have the docker group, add your user to this group with the usermod command. I am assuming that you are trying to do it for your own user account and in that case, you can use the $USER variable.

Ubuntu Server Docker Image File

Verify that your user has been added to docker group by listing the users of the group. You probably have to log out and log in back again.

If you check your groups and docker groups is not listed even after logging out, you may have to restart Ubuntu. To avoid that, you can use the newgrp command liks this:

Docker

Now if you try running the docker commands without sudo, it should work just fine.

Further troubleshooting

In some cases, you may need to add additional permissions to some files specially if you have run the docker commands with sudo in the past.

You may try changing the group ownership of the /var/run/docker.sock file.

Ubuntu Server Docker Image

You may also try changing the group ownership of the ~/.docker directory.

And then try running docker with sudo. It should be fine.

Ubuntu Server Docker Image

I hope this little tutorial helped you to fix the annoying “Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Get http://%2Fvar%2Frun%2Fdocker.sock/v1.39/containers/json: dial unix /var/run/docker.sock: connect: permission denied” error with Docker in Ubuntu.

Sql Server Docker Image Ubuntu

Did it fix the problem for you? If yes, I welcome a quick comment of thanks from you. If not, I’ll be happy to help you fix this problem further.

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