Install Docker on CentOS or Ubuntu

What is Docker Engine ?

[1] Docker Engine is an open source containerization technology for building and containerizing your applications. Docker Engine acts as a client-server application with:
  • A server with a long-running daemon process dockerd.
  • APIs which specify interfaces that programs can use to talk to and instruct the Docker daemon.
  • A command line interface (CLI) client docker.
This article describes how to install docker on a CentOS or Ubuntu machine (virtual or physical).

CentOS

Cleaning 

Start removing Older versions of Docker.
$ sudo yum remove docker \
docker-client \
docker-client-latest \
docker-common \
docker-latest \
docker-latest-logrotate \
docker-logrotate \
docker-engine

Requirements

Install required packages for configuration management utility, and storage driver.
$ sudo yum install -y yum-utils device-mapper-persistent-data lvm2

Before starting the installation of Docker Community Edition for the first time on your machine, you need to set up the Docker repository.
$ sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo

Installing 


After adding the Docker repository, you can install Docker from this repository.
$ sudo yum install -y docker-ce docker-ce-cli containerd.io

Starting


To start docker on your machine, run:

$ sudo systemctl start docker

Chenking

To check if docker is properly installed on your host machine, run:
$ sudo docker run hello-world

Bonus

To enable docker start on machine startup, run:
$ sudo systemctl enable docker

Ubuntu

Cleaning 


Start removing Older versions of Docker.
$ sudo apt-get remove docker docker-engine docker.io containerd runc

Requirements

Update the apt package index.
$ sudo apt-get update

Installing 


After adding the Docker repository, you can install Docker from this repository.
$ sudo apt-get install docker-ce docker-ce-cli containerd.io

Chenking

To check if docker is properly installed on your host machine, run:
$ sudo docker run hello-world


Links: 
  • [1] https://docs.docker.com/install/

Commentaires

Enregistrer un commentaire

Posts les plus consultés de ce blog

How to increase Pods limit per worker node in Kubernetes

Image
Kubelet is close to pod limit Issue: The Alert Manager reported that our Kubelets running on the production nodes were running too many pods, close to the default limit of 110. Solution: First We need to take a look at Grafana dashboard to see if the nodes are able to receive more pods in terms of infrastructure resources (CPU/RAM, ....), then calculate the average of this resource utilization in order to determine the new value of pods limit on each node.   We suppose that the chosen value for the pods limit on nodes is 200, you can change it following these steps :     1.    Connect: First connect to the node (the worker with the issue):                                                 ...
Lire la suite

How to lunch Rancher using docker and heat in openstack

 In this article we will deploy a virtual machine in Openstack then install docker and rancher on it using Heat Orchestration Template.  If you want to deploy an private cloud at home using openstack, take a look at this guide : https://blog.yassinemaachi.com/2021/06/how-to-create-personal-cloud-at-home.html Below the template to deploy a network with router linked to a docker server instance with Rancher via private subnet. heat_template_version: 2015-04-30 description: template to deploy a network with router linked to a docker server instance with Rancher. parameters: public_net: type: string default: external_network description: > ID or name of public network for which floating IP addresses will be allocated dns_servers: type: comma_delimited_list default: 192.168.1.254,8.8.8.8,4.4.4.4 description: Comma separated list of DNS nameservers for the private network. router_name: type: string default: dmz_router description: ...
Lire la suite

Knative vs OpenFaaS: What are the differences?

Knative vs OpenFaaS: What are the differences? Knative and OpenFaaS can be primarily classified as "Serverless / Task Processing" tools. What is Knative? Kubernetes-based platform for serverless workloads. Knative provides a set of middleware components that are essential to build modern, source-centric, and container-based applications that can run anywhere: on premises, in the cloud, or even in a third-party data center. Github Repository: https://github.com/knative/serving Strong points weakness Full serverless platform No persistent queue Uses istio Istio required No GUI Few faas platform helpers What is OpenFaaS? Serverless Functions Made Simple for Kubernetes and Docker. Serverless Functions Made Simple for Docker and Kubernetes. Github Repository: https://github.com/openfaas/faas Strong points w...
Lire la suite