How to Update Docker Images and Containers to Latest Version
How to Update Docker Images and Containers to Latest Version. In this post, we introduce Docker container, its importance then show you how to update Docker images and containers to the latest version.
In simple words, we use Docker to organize and pack all its applications and upload them to the cloud without any dependencies. Using this platform, you easily build isolated environments that scale up or down automatically.
Let’s see what we have prepared for you below. Keep reading how to Update Docker Images and Containers to Latest Version.
What is Docker Container?
It is becoming increasingly important to adopt the containerization concept with more and more companies moving workloads to the cloud. Organizations deploy programs in containers with additional configuration files, libraries, etc., thanks to the containerization market, which is dominated by Docker.
As per surveys and reports, around 2/3rd of businesses use containers to execute their applications rather than virtual machines. It is so because containers make it possible to swiftly deploy, patch, or grow programs across numerous operating systems and platforms.
An open source platform technology of Docker makes it simpler to design, deploy, and execute apps more quickly by separating them from infrastructure. Additionally, it enables you to run various containers on a particular host. Compared to virtual machines, containers are more lightweight and come with everything (including libraries and other dependencies) required to run an application more quickly and efficiently.
By wrapping up an application with Docker, deployment and runtime concerns such as how to make it available over a network, memory usage management, storage, and I/O, and how permission access management both externally and uniformly across all “containerized” apps. In fact, any OS compatible host, be it Linux or Windows with the Docker runtime installed can run your Docker container.
Why Use Docker Containers?
Docker is a cost effective platform that makes it easier for developers to run or write codes faster and uses containers for better CI/CD workflows. Docker containers are quite similar to virtual machines (VMs), but much more precisely and finely tuned, containers operate. They separate a single program from both the underlying operating system and other containers, as well as from all of the dependencies that the app needs to execute.
Here are a few more reasons to convince why docker containers are widely used in software development as well as deployment processes:
1. Continuous Integration/Deployment (CI/CD) Workflows –Â Dockers are essential for CI/CD pipelines and DevOps processes. Containers ensure consistency between the production and development environments. Further, the automated build procedures may readily incorporate Docker images, enabling more efficient workflows for development, testing, and deployment.
2. Isolation –Â Applications and their dependencies can be highly isolated using containers. Application interactions within containers are prevented by the fact that each container runs in its own isolated environment. Conflicts between various software components are avoided as a result of this isolation, which improves security and stability.
3. Performance –Â Docker containers have a smaller footprint and can be generated and deployed more quickly than virtual machines because they do not contain an operating system.
4. Quick Deployment –Â With Docker, application deployment hardly takes any time. This is typically due to the fact that docker creates a container for each and every process and offers developers a uniform working environment. Additionally, you will save a lot of time because the programs do not boot into an OS.
5. Supports Multiple Platforms – Cloud computing service companies have been embracing Docker and its support for many years, including Google Compute Platform (GCP), Amazon Web Services (AWS), etc. because it is portable. Once the containerized application has been tested, you are free to deploy it to any other machine or run it inside an Amazon EC2 instance — just make sure the host operating system is Docker-compatible.
6. Community Support –Â A large ecosystem and active community around Docker support the ongoing development and advancement of container technology. The large variety of pre built images made accessible in Docker Hub, the official repository for Docker images, as a result of this capability makes it simpler to identify and use pre built solutions for diverse software components and services.
7. Efficient System Resource Usage –Â Compared to virtual machines, instances of containerized apps start up and shut down faster and may be packed onto their host hardware much more tightly.Â
How to Update Docker Images and Containers to Latest Version
In this section, we explore how to update Docker images and containers to the latest version.
Prerequisites
- A server running Ubuntu Linux operating system.
- A root user or a user with sudo privileges.
Install Required Dependencies
First, update all your system packages to the latest version using the following command.
apt update -y
apt upgrade -y
After updating all the packages, install some additional packages to your server.
apt install gnupg2 apt-transport-https ca-certificates curl software-properties-common
Once you are done, you can proceed to the next step.
Install Docker Package
It is always a good idea to install the Docker from the Docker’s repository. First, add the Docker GPG key using the following command.
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | apt-key add -
Next, add the Docker’s official repository to APT.
add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu focal stable"
Now, you can install the Docker package with the following command.
apt install docker-ce -y
Then, verify the Docker version using the following command.
docker version
You will see the Docker information on the following screen.
Pull MySQL Old Docker Image
For better understanding of this article, you need to pull the MySQL old images from the DockerHub registry. Run the following command to pull the MySQL 8.0 image.
docker pull mysql/mysql-server:8.0
You will see the following screen.
Now, verify the downloaded iamge version using the following command.
docker images
You should see the MySQL image version in the following output.
REPOSITORY TAG IMAGE ID CREATED SIZE
mysql/mysql-server 8.0 1d9c2219ff69 6 months ago 496MB
To see the more information of MySQL image, run the following command.
docker inspect image-id
You will see the MySQL information on the following screen.
Launch the MySQL Container
Now, run the following command to create the MySQL container from the downloaded image.
docker run -dit mysql/mysql-server:8.0
You will see the following output.
fdd4e3e339af8d49692f8c707144406a0c84cf86daee8b06b25865c6eceb3f12
Then, verify the running MySQL container with the following command.
docker ps
You will see the container status in the following output.
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
fdd4e3e339af mysql/mysql-server:8.0 "/entrypoint.sh mysq…" 35 seconds ago Up 34 seconds (healthy) 3306/tcp, 33060-33061/tcp bold_shtern
Update MySQL Docker Image to the Latest Version
In this section, we will update the MySQL Docker image from version 8.0 to the latest version.
First, stop the running MySQL container using the following command.
docker stop container-id
Next, remove the MySQL container.
docker rm container-id
You will also need to remove the MySQL 8.0 Docker image from your system. To remove the MySQL image, run the following command.
docker rmi imgae-id
Now, pull the MySQL latest image from the Docker hub registry.
docker pull mysql/mysql-server:latest
You will see the following screen.
Now, verify the MySQL image version using the following command.
docker images
You should see the MySQL image version in the following output.
REPOSITORY TAG IMAGE ID CREATED SIZE
mysql/mysql-server latest 1d9c2219ff69 6 months ago 496MB
Next, create a MySQL container from the newly downloaded MySQL Docker image.
docker run -dit mysql/mysql-server
You can now verify the container status using the following command.
docker ps
Output.
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
319a67dc8e94 mysql/mysql-server "/entrypoint.sh mysq…" 6 seconds ago Up 5 seconds (health: starting) 3306/tcp, 33060-33061/tcp serene_feynman
You can also verify the new MySQL Docker image information using the following command.
docker inspect image-id
This will show you the MySQL latest version information on the following screen.
Thank you for your time. This is it with How to Update Docker Images and Containers to Latest Version. Let’s conclude below.Â
How to Update Docker Images and Containers to Latest Version Conclusion
In this tutorial, we have created a Docker container from the MySQL 8.0 Docker image. Then, showed you how to update the MySQL older Docker image to the latest version. We hope this post helps you in updating any Docker image and container to the latest version.
