How To Create A Container In Docker To Run An Application On Rocky Linux 9.5
To Create A Container In Docker To Run An Application On Rocky linux 9.5
Introduction
Docker is an open platform for developing, shipping, and running applications. Docker enables you to separate your applications from your infrastructure so you can deliver software quickly. With Docker, you can manage your infrastructure in the same ways you manage your applications. By taking advantage of Docker's methodologies for shipping, testing, and deploying code, you can significantly reduce the delay between writing code and running it in production.
Procedure:
Step 1: Check OS Version
[root@localhost linuxhelp]# cat /etc/os-release
NAME="Rocky Linux"
VERSION="9.5 (Blue Onyx)"
ID="rocky"
ID_LIKE="rhel centos fedora"
VERSION_ID="9.5"
PLATFORM_ID="platform:el9"
PRETTY_NAME="Rocky Linux 9.5 (Blue Onyx)"
ANSI_COLOR="0;32"
LOGO="fedora-logo-icon"
CPE_NAME="cpe:/o:rocky:rocky:9::baseos"
HOME_URL="https://rockylinux.org/"
VENDOR_NAME="RESF"
VENDOR_URL="https://resf.org/"
BUG_REPORT_URL="https://bugs.rockylinux.org/"
SUPPORT_END="2032-05-31"
ROCKY_SUPPORT_PRODUCT="Rocky-Linux-9"
ROCKY_SUPPORT_PRODUCT_VERSION="9.5"
REDHAT_SUPPORT_PRODUCT="Rocky Linux"
REDHAT_SUPPORT_PRODUCT_VERSION="9.5"
Step 2: Install Docker
root@localhost linuxhelp]# curl https://get.docker.com/ | bash
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 22592 100 22592 0 0 195k 0 --:--:-- --:--:-- --:--:-- 196k
# Executing docker install script, commit: 4c94a56999e10efcf48c5b8e3f6afea464f9108e
Warning: the "docker" command appears to already exist on this system.
If you already have Docker installed, this script can cause trouble, which is
why we're displaying this warning and provide the opportunity to cancel the
installation.
If you installed the current Docker package using this script and are using it
again to update Docker, you can ignore this message, but be aware that the
script resets any custom changes in the deb and rpm repo configuration
files to match the parameters passed to the script.
You may press Ctrl+C now to abort this script.
+ sleep 20
Step 3: Check version of Docker
root@localhost linuxhelp]# docker version
Client: Docker Engine - Community
Version: 28.0.1
API version: 1.48
Go version: go1.23.6
Git commit: 068a01e
Built: Wed Feb 26 10:42:23 2025
OS/Arch: linux/amd64
Context: default
Server: Docker Engine - Community
Engine:
Version: 28.0.1
API version: 1.48 (minimum version 1.24)
Go version: go1.23.6
Git commit: bbd0a17
Built: Wed Feb 26 10:40:43 2025
OS/Arch: linux/amd64
Experimental: false
containerd:
Version: 1.7.25
GitCommit: bcc810d6b9066471b0b6fa75f557a15a1cbf31bb
runc:
Version: 1.2.4
GitCommit: v1.2.4-0-g6c52b3f
docker-init:
Version: 0.19.0
GitCommit: de40ad0
Step 4: Check Docker containers
root@localhost linuxhelp]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
Step 5: Run docker pull command then getting image from the docker hub repository
root@localhost linuxhelp]# docker pull nginx:latest
latest: Pulling from library/nginx
66a3d608f3fa: Pull complete
58290db888fa: Pull complete
5d777e0071f6: Pull complete
dbcfe8732ee6: Pull complete
37d775ecfbb9: Pull complete
e0350d1fd4dd: Pull complete
1f4aa363b71a: Pull complete
e74fff0a393a: Pull complete
Digest: sha256:814a8e88df978ade80e584cc5b333144b9372a8e3c98872d07137dbf3b44d0e4
Status: Downloaded newer image for nginx:latest
docker.io/library/nginx:latest
Step 6: Check Docker images
root@localhost linuxhelp]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
nginx latest b52e0b094bc0 3 weeks ago 192MB
Step 7: Run Docker container
root@localhost linuxhelp]# docker run -d –name nginx -p 8000:80 b52e0b094bc0
b8b1ce210a0ce2047222845ba1260aca4b9537a1508465421ed699429f186477
Step 8: Check Docker Container
root@localhost linuxhelp]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
a5141fd985af b52e0b094bc0 "/docker-entrypoint.…" 37 seconds ago Up 34 seconds 0.0.0.0:8001->80/tcp, :::8001->80/tcp nginx
Conclusion:
We have reached the end of this article. In this guide, we have walked you through the steps required to create containers in Docker. Your feedback is much welcome.
Q
4. What’s the difference between virtualization and containerization?
A
Virtualization is an abstract version of a physical machine, while containerization is the abstract version of an application.
Q
3. What is a container?
A
Containers are deployed applications bundled with all necessary dependencies and configuration files. All of the elements share the same OS kernel. Since the container isn’t tied to any one IT infrastructure, it can run on a different system or the cloud.
Q
2. Why should anyone use Docker? What does it offer?
A
Docker gives users many incentives for adoption, such as:
• An efficient and easy initial setup experience
• The means to describe an application lifecycle in detail
• Simple configuration and smooth interaction with Docker Compose
• Complete and well-detailed documentation
• Ability to run on a PC or enterprise IT system with equal ease
• An efficient and easy initial setup experience
• The means to describe an application lifecycle in detail
• Simple configuration and smooth interaction with Docker Compose
• Complete and well-detailed documentation
• Ability to run on a PC or enterprise IT system with equal ease
Q
1. What is Docker?
A
Docker is an open-source containerization platform. It is used to automate the deployment of any application, using lightweight, portable containers.
1. Docker Client. Performs Docker build pull, and run operations to open up communication with the Docker Host. The Docker command then employs the Docker API to call any queries to run.
2. Docker Host. Contains Docker daemon, containers, and associated images. The Docker daemon establishes a connection with the Registry. The stored images are a type of metadata dedicated to containerized applications.
3. Registry. This is where Docker images are stored. There are two of them, a public registry and a private one Docker Hub and Docker Cloud are two public registries available for use by anyone.