All about Docker!

systemctl start docker

gpasswd -a $USER docker

sudo usermod -aG docker $USER

newgrp docker

# Run ubuntu without exiting

docker run -p 8091:80 -idt --name ub1 ubuntu

docker run -p 8092:80 -idt --name ub2 ubuntu

docker run -p 8095:80 -idt --name ub3 --network other-network ubuntu

FROM ubuntu:latest

RUN apt update && apt install openssh-server sudo -y && apt-get nmap

RUN useradd -rm -d /home/ubuntu -s /bin/bash -g root -G sudo -u 1000 test

RUN echo 'test:test' | chpasswd

RUN service ssh start

EXPOSE 22

CMD ["/usr/sbin/sshd","-D"]

docker build -t ub .

docker run -p 8091:22 -idt --name ub1 ub

docker run -p 8092:80 -idt --name ub2 ub

# Get IP Addressess

docker inspect -f '{{range.NetworkSettings.Networks}}{{.IPAddress}}{{end}}' ub1

docker inspect -f '{{range.NetworkSettings.Networks}}{{.IPAddress}}{{end}}' ub2

docker inspect -f '{{range.NetworkSettings.Networks}}{{.IPAddress}}{{end}}' ub3

# Check Connectivty

docker exec -t ub1 bash -c "ls"

docker network create --driver bridge --subnet 182.18.0.1/24 --gateway 182.18.0.1 other-network

docker run -p 8095:80 -idt --name ub3 --network other-network ub

#ANSIBLE TEST

ssh test@172.17.0.3

ssh-keygen

ssh-copy-id -i ~/.ssh/id_rsa.pub test@172.17.0.3

docker network ls

docker inspect cont_name or ID

docker network inspect bridge, host, none

# ex:

docker run --name alpine-2 --network=none alpine

# Create a new network named wp-mysql-network using the bridge driver.

# Allocate subnet 182.18.0.1/24.

# Configure Gateway 182.18.0.1

docker network create --driver bridge --subnet 182.18.0.1/24 --gateway 182.18.0.1 wp-mysql-network

# Deploy a mysql database using the mysql:5.6 image and name it mysql-db.

# Attach it to the newly created network wp-mysql-network

docker run -d -e MYSQL_ROOT_PASSWORD=db_pass123 --name mysql-db --network wp-mysql-network mysql:5.6

# Deploy a web application named webapp, using image kodekloud/simple-webapp-mysql.

# Expose port to 38080 on the host.

# The application takes an environment variable DB_Host that has the hostname of the mysql database.

# Make sure to attach it to the newly created network wp-mysql-network

docker run --network=wp-mysql-network -e DB_Host=mysql-db -e DB_Password=db_pass123 -p 38080:8080 --name webapp --link mysql-db:mysql-db -d kodekloud/simple-webapp-mysql