Explore information related to containers

LXC container vs VM

This article will deal with the differences between LXC container and VM as well as which to choose. VMs are the best choice if you need to host multiple applications in the same environment for multiple purposes. LXC containers are preferred in cases where you have a single-purpose application environment. 

KVM is hardware-level virtualization with its own kernel instance. 

This allows the user to boot their own operating system of choice with no underlying or base OS. 

And since each server is its own instance, they can be migrated without having to reboot.

Advantages to LXC:

1. It is easier to maintain and has very little overhead on deployment compared to a virtual machine. This allows for a much more lightweight cloud environment with LXC.

2. Containers also have a faster startup and stop speed, making them much more efficient overall.

3. Multiple containers can be deployed on the host system, where VMs are heavier on resources.

Read More



Manage Docker Volumes using Docker Compose

This article will guide you on steps to use #Docker #Compose for manging Docker #Volumes.
When you execute a docker-compose command, the volumes #directive in docker-compose. yml file mounts source directories or volumes from your computer at target paths inside the container. If a matching target path exists already as part of the container image, it will be overwritten by the mounted path.
A #Dockerfile is a text document that contains all the commands a user could call on the command line to assemble an image. Using docker build users can create an automated build that executes several command-line instructions in succession. This page describes the commands you can use in a Dockerfile .
List of Docker #Commands:
i. docker run – Runs a command in a new #container.
ii. docker start – Starts one or more stopped containers.
iii. docker stop – Stops one or more running containers.
iv. docker build – Builds an image form a Docker file.
v. docker pull – Pulls an #image or a repository from a registry.

Read More



Share Data between Docker Containers

This article will guide you on steps to share #data between #docker #containers. To mount a data volume to a container add the --mount flag to the docker run #command. It adds the volume to the specified container, where it stores the data produced inside the virtual 3environment.

From the Docker #host, as Docker Volumes: Volumes are stored in an area of the host filesystem that's managed by Docker. Bind mounts can map to any folder in the host filesystem, so access can't be controlled from a Docker process and can pose a security risk as a container could access sensitive OS folders.

A Docker container image is a lightweight, standalone, executable package of software that includes everything needed to run an application: code, runtime, system tools, system libraries and settings.

To copy from Docker to local container:

1. First, set the #path in your localhost to where the file is stored.

2. Next set the path in your docker container to where you want to store the file inside your docker container.

3. Then copy the file which you want to store in your docker container with the help of CP command.

Read More



Deploy Multiple WordPress Applications On Ubuntu

This article will guide you on how to deploy multiple #WordPress applications on #Ubuntu with #Docker.
Docker is a #tool designed to make it easier to create, deploy, and run applications by using #containers. Containers allow a developer to package up an application with all of the parts it needs, such as libraries and other #dependencies, and ship it all out as one package.
The Objectives to deploy a docker container:
1. Package a sample web application into a Docker #image.
2. Upload the Docker image to Container #Registry.
3. Create a GKE #cluster.
4. Deploy the sample #app to the cluster.
5. Manage autoscaling for the deployment.
6. Expose the sample app to the internet.
7. Deploy a new version of the sample app.

Read More



Set Up Laravel Nginx and MySQL with Docker Compose

This article will guide you on how to set up #Laravel, #Nginx, and #MySQL with #Docker Compose. When using a #LEMP application stack, for example, with PHP, Nginx, MySQL and the Laravel framework, Docker can significantly streamline the setup process.
Docker Compose has further simplified the development process by allowing developers to define their #infrastructure, including application services, #networks, and volumes, in a single file. Docker Compose offers an efficient alternative to running multiple docker container create and docker container run #commands.

Read More



Process to install Docker on Windows

This article will guide you on the steps to install docker on Windows by setting up a Linux virtual #machine to run as a guest in Windows 10 Home.
Docker Desktop is an easy-to-install application for your #Mac or Windows environment that enables you to build and share containerized applications and microservices. Docker Desktop includes Docker #Engine, Docker CLI client, Docker Compose, Notary, #Kubernetes, and Credential Helper.
You can download #Docker #Desktop for Windows from Docker Hub. This relates to installing Docker Desktop on #Windows 10 Pro, Enterprise, and Education.

Read More



Deploy Zimbra Collaboration using docker

This article will guide you on the steps to run #Zimbra on #Docker #Container. Docker enables apps to quickly assemble from components.

Read More



Install Jenkins on Ubuntu 18 04

This article will guide you on the steps to install #Jenkins on #Ubuntu 18.04 which involves installing it from Ubuntu #packages or can download and install its WAR file.

Jenkins is a Java-based open source #automation server that helps to repetitive technical tasks.

Read More



Exporting and importing docker containers

This article will take you through the steps to export and import docker containers between on server to another server using simple ssh commands.

Read More



How to fix docker Error response from daemon unable to remove volume

Server users experience Docker error such as "error response from daemon: unable to remove volume" when trying to remove the volume of a container in Docker.

Read More