Build and run container images with Docker.

Usage

• This build can only access files in the home directory. So Dockerfiles and all other files used in commands like docker build, docker save and docker load need to be in $HOME.
• You can change the configuration of this build by modifying the files in /var/snap/docker/current/.
• Additional certificates used by the Docker daemon to authenticate with registries need to be added in /var/snap/docker/common/etc/certs.d (instead of /etc/docker/certs.d).

Running Docker as normal user

By default, Docker is only accessible with root privileges (sudo). If you want to use docker as a regular user, you need to add your user to the docker group.

Warning: if you add your user to the docker group, it will have similar power as the root user. For details on how this impacts security in your system, see https://docs.docker.com/engine/security/#docker-daemon-attack-surface

The Docker Weekly is a email newsletter with the latest content on Docker and the event agenda for the upcoming weeks. Meet the Captains Select members of the community that are both experts in their field and are passionate about sharing their Docker knowledge with others. Installing Snapd. Snapd is a REST API daemon for managing snap packages. It also provides an snap client command line utility to interact with the sanpd daemon. Users can interact with it by using the snap client. Most of the latest Linux operating systems are pre installed with snapd daemon application. The actual.snap files are kept in the /var/lib/snapd/snaps/ directory. When running, those files will be mounted within the root directory /snap/. Looking over there — in the /snap/core/ subdirectory — you’ll see what looks like a regular Linux file system. In other words, Docker gives us a thing there. Snaps gives us a thing here. For example, on a desktop, a snap provides an app right on it. A snap can't pollute the rest of the system. Create and run a docker container that is able to run snap packages This script allows you to create docker containers that are able to run and build snap packages.

Authors

This snap is built by Canonical based on source code published by Docker, Inc. It is not endorsed or published by Docker, Inc.

Docker and the Docker logo are trademarks or registered trademarks of Docker, Inc. in the United States and/or other countries. Docker, Inc. and other parties may also have trademark rights in other terms used herein.

Docker Vs Snapd

This topic describes the Docker and Snap prerequisites for the Connector on Ubuntu and RedHat.

What are Snap and Docker?

Docker is a set of platforms that uses OS-level virtualization to deliver software in packages called containers. For more details, see https://www.docker.com/.

Snap is a software deployment and package management system developed by Canonical for the Linux operating system. For more details, see https://snapcraft.io/.

Prerequisites for Ubuntu

Docker Snapdragons

For more details about installing Docker on Ubuntu, see https://docs.docker.com/install/linux/docker-ce/ubuntu/.

1. Update the Docker apt package index:

2. Install packages to allow apt to use a repository over HTTPS:

   You may be prompted for - sudo dpkg --configure -a

   If the following screen appears, select Yes.

3. Add Docker’s official GPG key:

4. Use the following command to set up the stable repository:

5. Update the apt package index:

6. Install the latest version of Docker:

7. Verify that Docker is installed correctly:

In Ubuntu 18.04, Snap is installed by default so you can use it immediately.

Prerequisites for RedHat

For more details about installing Docker on RedHat, see https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux_atomic_host/7/html-single/getting_started_with_containers/index#getting_docker_in_rhel_7.

1. Enable the following repositories, which will allow you to install the docker package and related software:

   Make sure you specify the code exactly as it appears in the above example.

2. Install Docker:

3. Start docker:

4. Enable docker:

5. Verify that Docker is installed correctly:

For more details about installing Snap on RedHat, see https://snapcraft.io/docs/installing-snap-on-red-hat.

1. Add the Extra Packages for Enterprise Linux (EPEL) repository to your RHEL 7 system with the following command:

2. Add the optional and extras repositories:

3. Install the snapd package:

4. Enable the systemd unit that manages the main snap communication socket:

5. Run the following command to enable classic snap support and create a symbolic link between /var/lib/snapd/snap and /snap:

6. Verify that Snap is installed correctly: