6. DOCKER

MONOLITIC: Multiple services on a single server with single db
MICROSERVICES: Multiple services on Multiple servers with Multiple db

SERVER = CONTAINERS = VM

CONTAINER: It's like a VM without OS.
IMAGE: It will have os/software & pkg.
SERVER (AMI) = CONTAINER (image)
DOCKER: It's a containerization tool.

containerization: the process of packing an application with its dependencies.
os level of virtualization.

virtualization is Hardware level
containerization is OS level

INSTALL:
yum install docker -y
service start docker
service status docker


COMMANDS:
docker images: to show a list of images
docker pull ubuntu: to get ubuntu image
docker run ubuntu: to create a container
docker run -it --name cont2 ubuntu: it will create cont2 with interactive mode
docker ps -a: to show list of containers

OS LEVEL OF VIRTUALIZATION:
cat /etc/os-release
apt update -y
apt upgrade -y

apt = package manager = advance pacakger tool

touch file{1..5}
apt install apache2 maven -y
ctrl p q: to exit from container


HISTORY:
  1  yum install docker -y
    2  service start docker
    3  service  docker start
    4  service  docker status
    5  docker images
    6  docker pull ubuntu
    7  docker images
    8  df -h
    9  docker pull amazonlinux2
   10  docker pull amazonlinux
   11  docker images
   12  docker pull jenkins/jenkins:lts
   13  docker images
   14  docker run ubuntu
   15  docker ps -a
   16  docker run --name cont1 ubuntu
   17  docker ps -a
   18  docker run -it --name cont2 ubuntu
   19  docker ps -a
   20  docker images
   21  docker commit c5589fa2f54a swiggy
   22  docker images
   23  docker run -it --name cont3 swiggy
   24  docker images
   25  docker run -it --name cont4 amazonlinux
   26  history

=======================================================
11-07-2023: day 02

DOCKER FILE:
It is an automated way to create images.
it will have components, which are in capital letters.
in Dockerfile D must be capital.

BUILD -- > To run the docker file
command: docker build -t image_name path_of_Dockerfile

FROM: base image
RUN: executes Linux commands (image creation)
CMD: executes Linux commands (container creation)
ENTRYPOINT: It will override the command.
COPY: copies the local file to container
ADD: copies the internet file to container (or) extract the files
WORKDIR: Opens the required folder 
ENV: To pass the env variables (inside container)
ARGS: To pass the env variables (outside container)
labels: to attach label to conatiner


EXAMPLE-1:
FROM ubuntu
RUN apt update -y
RUN apt install apache2 -y
RUN apt install maven -y
RUN apt install mysql-server -y

EXAMPLE-2:
FROM ubuntu
RUN apt update -y
RUN apt install apache2 -y
RUN apt install maven -y
RUN apt install mysql-server -y
CMD apt install default-jdk -y

EXAMPLE-3:
FROM ubuntu
RUN apt update -y
RUN apt install apache2 -y
RUN apt install maven -y
RUN apt install mysql-server -y
COPY abc.txt /tmp
COPY raham.txt /tmp
ADD https://dlcdn.apache.org/maven/maven-3/3.8.8/binaries/apache-maven-3.8.8-bin.tar.gz /tmp

EXAMPLE-4:
FROM ubuntu
RUN apt update -y
RUN apt install apache2 -y
RUN apt install maven -y
RUN apt install mysql-server -y
COPY abc.txt /tmp
COPY raham.txt /tmp
ADD https://dlcdn.apache.org/maven/maven-3/3.8.8/binaries/apache-maven-3.8.8-bin.tar.gz /tmp
WORKDIR /tmp
ENV name raham
LABEL email rahamshaik007

HISTORY:

  1  yum install docker -y
    2  service start docker
    3  service docker start
    4  service docker status
    5  docker images
    6  docker pull ubuntu
    7  docker images
    8  docker pull amazonlinux
    9  docker images
   10  docker run -it --name cont1 ubuntu
   11  docker ps -a
   12  docker commit cont1 swiggy
   13  docker run -it --name cont2 swiggy
   14  vim Dockerfile
   15  docker build -t swiggy:v2 .
   16  vim Dockerfile
   17  docker build -t swiggy:v2 .
   18  docker images
   19  docker run -it --name cont3 swiggy:v2
   20  docker images
   21  vim Dockerfile
   22  docker build -t swiggy:v2 .
   23  docker images
   24  docker run -it --name cont4 swiggy:v2
   25  vim Dockerfile
   26  docker build -t swiggy:v2 .
   27  docker run -it --name cont5 swiggy:v2
   28  vim Dockerfile
   29  docker build -t swiggy:v2 .
   30  docker run -it --name cont6 swiggy:v2
   31  ll
   32  vim abc.txt
   33  ll
   34  vim Dockerfile
   35  docker build -t swiggy:v2 .
   36  docker run -it --name cont7 swiggy:v2
   37  docker ps
   38  docker ps -a
   39  vim Dockerfile
   40  docker build -t swiggy:v2 .
   41  docker run -it --name cont8 swiggy:v2
   42  ll
   43  vim raham.txt
   44  ll
   45  vim Dockerfile
   46  docker build -t swiggy:v2 .
   47  docker run -it --name cont9 swiggy:v2
   48  vim Dockerfile
   49  docker build -t swiggy:v2 .
   50  docker run -it --name cont10 swiggy:v2
   51  vim Dockerfile
   52  docker build -t swiggy:v2 .
   53  docker run -it --name cont11 swiggy:v2
   54  docker ps
   55  docker ps -a
   56  docker ps
   57  docker inspect cont11
   58  cat Dockerfile
   59  ll
   60  rm -rf *
   61  vim Dockerfile
   62  cat Dockerfile
   63  vim index.html
   64  docker build -t devops:v1 .
   65  docker images
   66  docker run -it --name appcont -p 80:80 devops:v1
   67  docker run -d --name appcont1 -p 81:80 devops:v1
   68  docker ps
   69  docker run -d --name appcont2 -p 80:82 devops:v1
   70  docker run -itd --name appcont3 -p 82:80 devops:v1
   71  docker run -itd --name appcont4 -p 80:85 devops:v1
   72  docker logs appcont4
   73  docker ps
   74  systemctl restart docker
   75  docker ps -a -q
   76  docker stop $(docker ps -a -q)
   77  docker rm $(docker ps -a -q)
   78  docker ps -a
   79  docker run -itd --name cont1 -p 80:80 devops:v1
   80  docker run -itd --name cont2 -p 81:80 devops:v1
   81  docker run -itd --name cont2 -p 82:80 devops:v1
   82  docker run -itd --name cont3 -p 83:80 devops:v1
   83  history


DEPLOYMENT:

Dockerfile
FROM ubuntu
RUN apt-get update -y
RUN apt-get install apache2 -y
COPY index.html /var/www/html/
CMD ["/usr/sbin/apachectl", "-D", "FOREGROUND"]

CODE:

<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
body {font-family: Arial, Helvetica, sans-serif;}

/* Full-width input fields */
input[type=text], input[type=password] {
  width: 100%;
  padding: 12px 20px;
  margin: 8px 0;
  display: inline-block;
  border: 1px solid #ccc;
  box-sizing: border-box;
}

/* Set a style for all buttons */
button {
  background-color: #04AA6D;
  color: white;
  padding: 14px 20px;
  margin: 8px 0;
  border: none;
  cursor: pointer;
  width: 100%;
}

button:hover {
  opacity: 0.8;
}

/* Extra styles for the cancel button */
.cancelbtn {
  width: auto;
  padding: 10px 18px;
  background-color: #f44336;
}

/* Center the image and position the close button */
.imgcontainer {
  text-align: center;
  margin: 24px 0 12px 0;
  position: relative;
}

img.avatar {
  width: 40%;
  border-radius: 50%;
}

.container {
  padding: 16px;
}

span.psw {
  float: right;
  padding-top: 16px;
}

/* The Modal (background) */
.modal {
  display: none; /* Hidden by default */
  position: fixed; /* Stay in place */
  z-index: 1; /* Sit on top */
  left: 0;
  top: 0;
  width: 100%; /* Full width */
  height: 100%; /* Full height */
  overflow: auto; /* Enable scroll if needed */
  background-color: rgb(0,0,0); /* Fallback color */
  background-color: rgba(0,0,0,0.4); /* Black w/ opacity */
  padding-top: 60px;
}

/* Modal Content/Box */
.modal-content {
  background-color: #fefefe;
  margin: 5% auto 15% auto; /* 5% from the top, 15% from the bottom and centered */
  border: 1px solid #888;
  width: 80%; /* Could be more or less, depending on screen size */
}

/* The Close Button (x) */
.close {
  position: absolute;
  right: 25px;
  top: 0;
  color: #000;
  font-size: 35px;
  font-weight: bold;
}

.close:hover,
.close:focus {
  color: red;
  cursor: pointer;
}

/* Add Zoom Animation */
.animate {
  -webkit-animation: animatezoom 0.6s;
  animation: animatezoom 0.6s
}

@-webkit-keyframes animatezoom {
  from {-webkit-transform: scale(0)} 
  to {-webkit-transform: scale(1)}
}
  
@keyframes animatezoom {
  from {transform: scale(0)} 
  to {transform: scale(1)}
}

/* Change styles for span and cancel button on extra small screens */
@media screen and (max-width: 300px) {
  span.psw {
     display: block;
     float: none;
  }
  .cancelbtn {
     width: 100%;
  }
}
</style>
</head>
<body>

<h2>DevOps By Raham V:2.0</h2>

<button onclick="document.getElementById('id01').style.display='block'" style="width:auto;">Login</button>

<div id="id01" class="modal">
  
  <form class="modal-content animate" action="/action_page.php" method="post">
    <div class="imgcontainer">
      <span onclick="document.getElementById('id01').style.display='none'" class="close" title="Close Modal">&times;</span>
      <img src="img_avatar2.png" alt="Avatar" class="avatar">
    </div>

    <div class="container">
      <label for="uname"><b>Username</b></label>
      <input type="text" placeholder="Enter Username" name="uname" required>

      <label for="psw"><b>Password</b></label>
      <input type="password" placeholder="Enter Password" name="psw" required>
        
      <button type="submit">Login</button>
      <label>
        <input type="checkbox" checked="checked" name="remember"> Remember me
      </label>
    </div>

    <div class="container" style="background-color:#f1f1f1">
      <button type="button" onclick="document.getElementById('id01').style.display='none'" class="cancelbtn">Cancel</button>
      <span class="psw">Forgot <a href="#">password?</a></span>
    </div>
  </form>
</div>

<script>
// Get the modal
var modal = document.getElementById('id01');

// When the user clicks anywhere outside of the modal, close it
window.onclick = function(event) {
    if (event.target == modal) {
        modal.style.display = "none";
    }
}
</script>

</body>
</html>

====================

DAY-04: 13-07-2023 COMPOSE

DOCKER COMPOSE:

It is a tool used to build, run and ship multiple containers for application.
It is used to create multiple containers in a single host.
It used the YAML file to manage multi containers as a single service.
The Compose file provides a way to document and configure all of the application’s service dependencies (databases, queues, caches, web service APIs, etc). 

COMPOSE/DOCKER COMPOSE FILE: (yml=yaml)
We provide details about services.
ex: image, port, volume ----

INSTALLATION:

sudo curl -L "https://github.com/docker/compose/releases/download/1.29.1/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
ls /usr/local/bin/
sudo ln -s /usr/local/bin/docker-compose /usr/bin/docker-compose
sudo chmod +x /usr/local/bin/docker-compose
docker-compose version

stop vs kill:
it will wait a few sec to stop the running process
it won't wait to stop the process 

WORKING:

version: '3'
services:
  movies:
    image: paymovies:v1
    ports:
      - "90:80"
  train:
    image: paytrain:v1
    ports:
      - "91:80"
  dth:
    image: paydth:v1
    ports:
      - "92:80"
  recharge:
    image: payrecharge:v1
    ports:
      - "93:80"


HISTORY:
 1  docker images
    2  docker run -itd --name movies -p 90:80 paymovies:v1
    3  LL
    4  ll
    5  sudo curl -L "https://github.com/docker/compose/releases/download/1.29.1/docker-compose-$(uname -s)-$(uname -m)" -o /usr/                                                                                                                                                                                                                                       local/bin/docker-compose
    6  ls /usr/local/bin/
    7  sudo ln -s /usr/local/bin/docker-compose /usr/bin/docker-compose
    8  sudo chmod +x /usr/local/bin/docker-compose
    9  docker-compose version
   10  docker ps
   11  docker stop 272acc16526a
   12  docker start 272acc16526a
   13  docker kill 272acc16526a
   14  docker rm movies
   15  docker ps -a
   16  vim docker-compose.yml
   17  ll
   18  docker-compose up -d
   19  docker ps
   20  vim docker-compose.yml
   21  ll
   22  vim index.html
   23  docker images
   24  docker build -t paytrain:v1 .
   25  docker images
   26  vim docker-compose.yml
   27  docker-compose up -d
   28  docker ps
   29  vi index.html
   30  docker build -t paydth:v1 .
   31  docker images
   32  vim docker-compose.yml
   33  docker-compose up -d
   34  docker ps
   35  vim index.html
   36  ll
   37  docker run -t payrecharge:v1 .
   38  docker build -t payrecharge:v1 .
   39  docker images
   40  vim docker-compose.yml
   41  docker-compose up -d
   42  docker ps
   43  docker-compose down
   44  docker ps
   45  docker-compose up -d
   46  docker ps
   47  docker run cont1
   48  docker run -d --name cont1 ubuntu
   49  docker run -d --name cont2 ubuntu
   50  docker run -d --name cont3 ubuntu
   51  docker ps
   52  docker ps -a
   53  docker-compose ps -a
   54* docker p
   55  docker-compose images
   56  docker images
   57  docker-compose logs
   58  docker-compose events
   59  vim docker-compose.yml
   60  docker-compose stop
   61  vim docker-compose.yml
   62  docker-compose stop
   63  vim docker-compose.yml
   64  docker-compose stop
   65  vim docker-compose.yml
   66  docker ps
   67  docker kill 2932b0073234
   68  docker ps
   69  docker-compose up -d
   70  docker ps
   71  cat docker-compose.yml

================================================================================
17-07-2023: Docker swarm, docker hub

  1  docker swarm init --advertise-addr 172.31.27.75
    2  docker node ls
    3  docker ps -a
    4  docker run -itd --name cont1 ubuntu 
    5  vim Dockerfile
    6  vim index.html
    7  docker build -t img:v1 .
    8  docker images
    9  docker tag img:v1 rahamshaik/rahamnewapp
   10  docker images
   11  docker push rahamshaik/rahamnewapp
   12  docker login 
   13  docker push rahamshaik/rahamnewapp
   14  docker service create --name raham --replicas 6 --publish 80:80 rahamshaik/rahamnewapp:latest
   15  docker ps -a
   16  docker service ls
   17  docker service raham ps 
   18  docker service ps raham
   19  docker service ls
   20  vim index.html 
   21  docker build -t image:v2 .
   22  docker images
   23  docker tag img:v2 rahamshaik/rahamnewapp
   24  docker tag image:v2 rahamshaik/rahamnewapp
   25  docker images
   26  docker push rahamshaik/rahamnewapp
   27  docker service create --name raham2 --replicas 5 --publish 81:80 rahamshaik/rahamnewapp:latest
   28  docker service ls
   29  docker service raham2 scale=10
   30  docker service scale raham2=10
   31  docker service ls
   32  docker service scale raham2=20
   33  docker service scale raham2=10
   34  docker service ps raham2
   35  docker service logs raham2
   36  docker node ls
   37  docker node rm joe5t7e970tntz2phruzoeukc
   38  docker node ls
   39  docker ps
   40  docker top cb2f4997df2d
   41  docker ps -a
   42  docker stop $(docker ps -a -q)
   43  docker ps -a
   44  docker service rm raham
   45  docker service rm raham2
   46  docker ps -a
   47  docker run -it --name jenkins -p 8080:8080 jenkins/jenkins:lts
   48  docker pull tomcat 
   49  yum install docker -y
   50  systemctl start docker
   51  systemctl status docker
   52  hostnamectl set-hostame manager
   53  hostnamectl set-hostname manager
   54  sudo -i