Tuesday, August 30, 2022

Nginx location Regex Expression

 Nginx Regex Expression

Nginx location block allow you to route request to particular location in file system or particular url.

Below example is to show how to route domain name and number to domain.com:port.

server {

  listen 80;

  server_name anup.co.in;

  root /usr/share/nginx/html;

   location ~ "/app/lck/([a-z0-9\-\.]+)/([0-9]+)" {

      return 301 http://$1:$2;



    Above highlighted part will redirect as follows -

http://anup.co.in/app/lck/google.com/8080  --> http://google.com:8080

Friday, March 11, 2022

How to run Docker inside Docker using Dockerfile

 How to run Docker inside Docker using Dockerfile

In some cases we want to run docker command inside docker container, we can do that by mapping docker.sock volume while running container.  The other option is to use your Dockerfile.

1] Here is Dockerfile -

FROM ubuntu:18.04

#Install Docker

RUN apt-get update

RUN apt-get -y install apt-transport-https

RUN apt-get -y install ca-certificates

RUN apt-get -y install curl

RUN apt-get -y install gnupg2

RUN apt-get -y install software-properties-common


RUN curl -fsSL https://download.docker.com/linux/ubuntu/gpg | (OUT=$(apt-key add - 2>&1) || echo $OUT)

RUN add-apt-repository --yes "deb [arch=amd64] https://download.docker.com/linux/ubuntu bionic stable"

RUN apt-get update

RUN echo "deb http://security.ubuntu.com/ubuntu xenial-security main" >> /etc/apt/sources.list; apt-get update

RUN apt-get -y install build-essential

RUN apt-get -y install docker-ce docker-ce-cli containerd.io

CMD ["tail", "-f", "/dev/null"]

2] Build docker image.

# docker build -t docker-in-docker:latest .

3] Run docker container from above docker image.
# docker run -d --name dockerINdocker docker-in-docker:latest

4] Enter into docker container and confirm docker version as per below image.