ajeetraina/docker101

Visit https://dockerlabs.collabnix.com

Docker for You (DFY)

** THIS IS AN OLD REPOSITORY. Please refer DockerLabs if you want to get started with Docker] **

Are you new to Docker? Want to build your career in Container Technology?

Then Welcome ! You are at the right place.

This repository brings you tutorials that help you get hands-on experience using Docker. Here you will find a mix of labs and tutorials that will help you, no matter if you are a beginner, SysAdmin, IT Pro or Developer. Yes, you read it correct ! Its $0 learning platform. You don't need any infrastructure. Most of the tutorials runs on Play with Docker Platform. This is a free browser based learning platform for you. Docker tools like Docker Engine, Docker Compose & Docker Machine are already installed for you. All you need is to get started.

Getting Started with Docker

To get started with Docker, follow the below steps:

• Create Dockerhub Account
• Open Play with Docker Platform
• Click on "Start"
• This will open up an easy to understand PWD(Play with Docker) tool which displays instances on the left hand side while terminal at the right hand side
• Click on "Create Instance" to create your first Linux instance

Getting Started with Docker Swarm

To get started with Docker Swarm, you can use "Play with Docker", shortly called PWD. It's free of cost and open for all. You get maximum of 5 instances of Linux system to play around with Docker.

• Open Play with Docker Labs on your browser
• Click on the icon near to Instance to choose 3 Managers & 2 Worker Nodes

• Wait for few seconds to bring up 5-Node Swarm Cluster

We recommend you start with one of our Beginners Guides, and then move to intermediate and expert level tutorials that cover most of the features of Docker. For a comprehensive approach to understanding Docker, I have categorized it as shown below:

Docker for Beginners

Docker for Intermediate

Docker for Advanced Users

A Bonus... Docker Swarm Visualizer

Swarm Visualizer is a fancy tool which visualized the Swarm Cluster setup. It displays containers running on each node in the form of visuals. If you are conducting Docker workshop, it's a perfect way to show your audience how the containers are placed under each node. Go..try it out..

Clone the Repository

git clone https://github.com/dockersamples/docker-swarm-visualizer

cd docker-swarm-visualizer
docker-compose up -d

To run in a docker swarm:

$ docker service create \
  --name=viz \
  --publish=8080:8080/tcp \
  --constraint=node.role==manager \
  --mount=type=bind,src=/var/run/docker.sock,dst=/var/run/docker.sock \
  dockersamples/visualizer

Docker-Ready Solution for You

WordPress under Docker Swarm

ELK under Docker Swarm

Prometheus Stack under Docker Swarm

Apache Jmeter under Docker Swarm Mode

Voting App Example

Playing around with Photon OS

Playing around with MacVLAN

IPv6 & Docker Compose

Trying out Gitlab

Getting Started with Nginx

docker101's Issues

Begineer: docker build for nginx fails

Firstly, THANK YOU for taking the efforts to create the repo with such amazing docker examples.

Issue: With respect to the build command as mentioned in https://github.com/ajeetraina/docker101/blob/master/beginners/intro-to-dockerfile-003.md results in error

`**testuser@INPNRLT5487:~/Desktop/docker-cert/docker101/beginners/nginx$ ls
nginx1.Dockerfile nginx2.Dockerfile

testuser@INPNRLT5487:~/Desktop/docker-cert/docker101/beginners/nginx$ docker build -t testuser/mynginx .
unable to prepare context: unable to evaluate symlinks in Dockerfile path: lstat /home/testuser/Desktop/docker-cert/docker101/beginners/nginx/Dockerfile: no such file or directory**
`

I was not really able to find the root cause of the issue as i could find examples over the net having ".Dockerfile" examples.

What did actually worked for me was:

`**testuser@INPNRLT5487:~/Desktop/docker-cert/docker101/beginners/nginx$ docker build -t testuser/mynginx -f nginx1.Dockerfile .
Sending build context to Docker daemon 3.072kB
Step 1/2 : FROM ubuntu
^C

testuser@INPNRLT5487:~/Desktop/docker-cert/docker101/beginners/nginx$**`

Just in case if this helps:
$ docker --version Docker version 19.03.6, build 369ce74a3c

I was going to create a PR for the same but didn't have the access rights as its your repo hence creating an issue to let you guys know about it.

[Bug reporting] XSS vulnerabilty in wp_kses_bad_protocol in wp-includes/kses.php (CVE-2019-20041)

Hi

I found a known XSS vulnerability in the recent version of docker101.
In particular, the bug we report is a known bug by CVE-2019-20041.

wp_kses_bad_protocol in wp-includes/kses.php in WordPress before 5.3.1 mishandles the HTML5 colon named entity, allowing attackers to bypass input sanitization, as demonstrated by the javascript: substring.

Please check this line:

docker101/advanced/security/apparmor/wordpress/html/wp-includes/kses.php

Line 1336 in a149f60

$string2 = preg_split( '/:|&#0*58;|&#x0*3a;/i', $string, 2 );

Thanks!

Unable to get LinuxKit running on Microsoft Azure Platform

Run az login and authenticate your Azure Account.

Ajeets-MacBook-Air:~ ajeetraina$ az ad sp create-for-rbac --name spname --password Oracle9ias
Retrying role assignment creation: 1/36
Retrying role assignment creation: 2/36
{
"appId": "aae5ce2a-1240-426f-b3f7-a3e8565bb70a",
"displayName": "spname",
"name": "http://spname",
"password": "Oracle9ias",
"tenant": "633df679-ee48-48ad-8841-543d1b723ae6"
}```

Role Assignment

{
  "id": "/subscriptions/43b263f8-40b0-4b20-be46-13355dc8c28b/providers/Microsoft.Authorization/roleAssignments/92f8de73-1bf4-4a7a-b6af-5485bb7d847f",
  "name": "92f8de73-1bf4-4a7a-b6af-5485bb7d847f",
  "properties": {
    "principalId": "ea7ca072-f4e0-4759-8288-583b83f3888a",
    "roleDefinitionId": "/subscriptions/43b263f8-40b0-4b20-be46-13355dc8c28b/providers/Microsoft.Authorization/roleDefinitions/acdd72a7-3385-48ef-bd42-f606fba81ae7",
    "scope": "/subscriptions/43b263f8-40b0-4b20-be46-13355dc8c28b"
  },
  "type": "Microsoft.Authorization/roleAssignments"
}```


```Ajeets-MacBook-Air:~ ajeetraina$ az role assignment list --assignee aae5ce2a-1240-426f-b3f7-a3e8565bb70a 
[
  {
    "id": "/subscriptions/43b263f8-40b0-4b20-be46-13355dc8c28b/providers/Microsoft.Authorization/roleAssignments/92f8de73-1bf4-4a7a-b6af-5485bb7d847f",
    "name": "92f8de73-1bf4-4a7a-b6af-5485bb7d847f",
    "properties": {
      "principalId": "ea7ca072-f4e0-4759-8288-583b83f3888a",
      "principalName": "http://spname",
      "roleDefinitionId": "/subscriptions/43b263f8-40b0-4b20-be46-13355dc8c28b/providers/Microsoft.Authorization/roleDefinitions/acdd72a7-3385-48ef-bd42-f606fba81ae7",
      "roleDefinitionName": "Reader",
      "scope": "/subscriptions/43b263f8-40b0-4b20-be46-13355dc8c28b"
    },
    "type": "Microsoft.Authorization/roleAssignments"
  }
]```




```Ajeets-MacBook-Air:~ ajeetraina$ az login --service-principal -u aae5ce2a-1240-426f-b3f7-a3e8565bb70a  --password Oracle9ias --tenant 633df679-ee48-48ad-8841-543d1b723ae6
[
  {
    "cloudName": "AzureCloud",
    "id": "43b263f8-40b0-4b20-be46-13355dc8c28b",
    "isDefault": true,
    "name": "Free Trial",
    "state": "Enabled",
    "tenantId": "633df679-ee48-48ad-8841-543d1b723ae6",
    "user": {
      "name": "aae5ce2a-1240-426f-b3f7-a3e8565bb70a",
      "type": "servicePrincipal"
    }
  }
]```