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Showing posts from February, 2023

Docker: Common Issues

There are many common issues that can arise when using Docker, but some of the most frequent ones include: Image not found: This occurs when Docker is unable to locate the specified image in its local cache or on a remote repository. Container failing to start : This can happen if the container is misconfigured, if there is a port conflict, or if the container is unable to access necessary resources. Port conflicts: This can occur when multiple containers or processes try to use the same network port. Insufficient disk space : Docker can require a significant amount of disk space, especially when working with large images or running multiple containers. Docker daemon not running : This can happen if Docker is not installed or is not running on the host system. Permission issues : Docker can sometimes encounter permission issues when accessing files or directories on the host system. Network connectivity is...

Explain Docker run with options

The docker run command is used to create and start a new container based on a Docker image. It has several options that can be used to customize the behavior of the container. Here's an example of how to use the docker run command with multiple options: docker run -d --name mycontainer -p 8080:80 -v /my/local/folder:/container/folder myima ge:tag Let's break down each option: -d option: This option runs the container in detached mode, which means the container runs in the background and does not hold your terminal window open. --name option: This option sets a custom name for the container. In this case, the container will be named mycontainer . -p option: This option maps a network port on the host to a container port. In this case, port 8080 on the host is mapped to port 80 in the container. -v option: This option mounts a local folder on the host to a folder in the container. In this case, the folder /my/local/fol...

Explain Docker push and pull command?

  Docker is a popular containerization technology that allows developers to package their applications and their dependencies into portable containers. Docker containers can be easily shared with others, and this is where the docker push and docker pull commands come in. The docker push command allows you to upload a Docker image to a registry, such as Docker Hub or a private registry. Here's the basic syntax for the docker push command: docker push <repository>:<tag>   For example, to push an image named "myapp" with the tag "v1" to Docker Hub, you would run the following command: docker push myusername/myapp:v1 You'll need to authenticate with Docker Hub before you can push images to it. If you haven't already done so, you can create a Docker Hub account at https://hub.docker.com/signup . The docker pull command, on the other hand, allows you to download a Docker image from a registry. Here's the basic syntax for the ...

Briefly Explain Basic Docker Commands?

Docker is a popular containerization technology that allows you to package and deploy software applications in a lightweight, portable, and scalable way. It provides a range of powerful commands that can be used to manage Docker containers, images, and networks. In this blog post, we will discuss all the essential Docker commands that you need to know. docker run - This command is used to create and run a new container. It takes the form docker run [OPTIONS] IMAGE [COMMAND] [ARG...] . For example, to run an Ubuntu container, you can use the command docker run -it ubuntu . docker build - This command is used to build a Docker image from a Dockerfile. It takes the form docker build [OPTIONS] PATH/URL . For example, to build an image from a Dockerfile in the current directory, you can use the command docker build -t myimage . . docker images - This command is used to list all the Docker images that are present on your system. It take...

How to Automate Dashboard in JIRA?

  To create an automated dashboard in Jira, you can follow these steps: Log in to your Jira account and navigate to the Dashboard section. Click on "Create dashboard" and give it a name. Choose the layout that you want for your dashboard and click on "Create." Now you can start adding gadgets to your dashboard. Gadgets are the building blocks of your dashboard, and they can display various types of information such as charts, tables, lists, etc. To add a gadget, click on "Add gadget" and select the type of gadget that you want to add. Configure the gadget by selecting the project, filter, or other parameters that you want to display in the gadget. Repeat the process to add more gadgets to your dashboard. You can rearrange the gadgets by dragging and dropping them into the desired position. Once you have added all the gadgets that you want to include, click on ...

How to Install Docker on different platform?

To install Docker on Windows, Linux, or Mac, follow the instructions below: Windows: Pre-requisites: • Before installing Docker on Windows, make sure you have Windows 10 Pro or Enterprise (64-bit) installed. Windows Home Edition does not support Docker. • Docker Desktop for Windows includes both Docker Engine and Docker Compose. It also installs VirtualBox and creates a Linux VM to run Docker containers. During installation, you can choose whether to use the Windows Subsystem for Linux (WSL) instead of the Linux VM. • If you have Hyper-V or another virtualization platform installed on your system, you may need to disable it before installing Docker. Docker requires exclusive access to virtualization features. Installation: • Download Docker Desktop for Windows from the official Docker website. • Double-click the downloaded file to start the installation process. • Follow the on-screen instructions to complete the installation. • Once installed, launch Docker Desktop fro...

Explain Docker Architecture Overview

Docker is a popular tool for building, shipping, and running applications in a consistent and portable manner. It uses containerization technology to isolate applications and their dependencies from the underlying host system, which makes it easy to deploy and scale applications across different environments. In this blog, we will discuss the architecture of Docker and how it works. Docker Architecture Overview Docker architecture consists of several components that work together to build, package, and deploy applications in containers. The main components of Docker architecture are: 1. Docker Daemon 2. Docker CLI 3. Docker Registry 4. Docker Images 5. Docker Containers 6. Docker Networks 7. Docker Volumes Let's discuss each of these components in detail. • Docker Daemon The Docker daemon is the core component of the Docker architecture. It is responsible for managing the Docker containers and images, as well as handling the communication between the Docker CLI a...