Docker Labs Day 1.txt

Lab1 : Start an Nginx Webserver
====================================
docker container run --publish 80:80 --name webserver --detach nginx
1) Download image 'nginx' from Docker Hub.
2) Started a new container from that image.
3) Opened port 80 on the host IP.
4) Route the traffic to the container IP,port 80.
5) --detach = Starts in detach mode
6) --name   = Name of your Container

Lab 2: Docker Useful Commands 
=====================================
a) List the total number of running Docker Containers
   	docker container ls
b) Stop the Docker Container
   	docker container stop <ContainerID>
c) Check no containers available
   	docker container ls -
d) This lists down the all the 
   	docker container ls -a
e) Logs for containers
   	docker container logs <ContainerName/ContainerID>
f) List the Process running inside your containers
   	docker container top <ContainerName/ContainerID>
g) Remove all stopped container instance
   	docker container rm <ContainerName/ContainerID> <ContainerName/ContainerID> ...
h) Remove all running and stoppped container instances
	docker container rm -f <ContainerName/ContainerID> <ContainerName/ContainerID> ...

Lab 3: Start a Mongo DB
====================================
docker run --name mongo -d mongo
Lists the processes under mongo db container
docker top mongo

Lab 4 Assignment
====================
Start Mysql DB
	docker container run -d -p 3306:3306 --name db -e MYSQL_RANDOM_ROOT_PASSWORD=yes mysql
	docker container logs db
	Find the GENERATED Root Password
Start httpd
docker container run -d --name webserver -p 8080:80 httpd

Start nginx
docker container run -d --name proxy -p 80:80 nginx

docker ps
Test 
curl localhost      - Niginx
curl localhost:8080 - Apache

Clean Up
docker container stop <ContainerName/ContainerID> <ContainerName/ContainerID> <ContainerName/ContainerID>

Lab 5: What's Going on in Containers
==========================================
docker container run -d -p 3306:3306 --name db -e MYSQL_RANDOM_ROOT_PASSWORD=yes mysql
docker container run -d --name proxy -p 80:80 nginx

docker container ls

List the Processes running in the containers
docker container top mysql
docker container top nginx

To find the metadata about the container(startup config,volumes,networking etc) use Inspect
docker container inspect mysql

To Find the live performance data of our containers
docker container stats


Lab 6 : Getting a Shell Inside Containers
==============================================
docker container run -it 	- starts a new container interactively
docker container exec -it - run additional command in existing container

docker container run -it --name proxy nginx bash

docker container run -it --name ubuntu ubuntu
apt-get update
apt-get install -y curl

Attach to an existing container while start
docker container start -ai ubuntu

----------
docker container exec -it mysql bash
ps aux - to list the processes inside a container


Lab 7 : Start an Alpine Distribution
=========================================
docker pull alpine
docker image ls

docker container run -it alpine bash
Error - As bash is not present

docker container run -it alpine sh

Lab 8 : Docker Networking
========================
docker container run -p 80:80 --name webhost -d nginx
To see the running port of your Docker Container
docker container port webhost
To see the IP address of your Docker Container
docker container inspect --format '{{ .NetworkSettings.IPAddress }}'

Inspect the bridge network
docker container inspect bridge

Create your own network
docker network create my_app_net

Start a nginx with newly created network
docker container run -d -p 80:80 --name new_nginx --network my_app_net nginx

Inspect the bridge network
docker container inspect my_app_net

docker network connect <containerID>
docker container inspect containerID

docker network disconnect <containerID>
docker container inspect containerID



Lab 9 : DNS
===========
docker container ls

docker network inspect <containerID>
docker container run -d --name my_nginx --network my_app_net nginx

docker network inspect <containerID>

docker container exec -it my_nginx ping new_nginx