rit-hub / docker-basics

Visit the URL -https://hub.docker.com/ Create a account with personal mail id Then visit the link https://labs.play-with-docker.com/

Docker Commands

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Basic docker commands....

docker images
docker ps
docker ps -a
docker run --help
docker run --name hello-container -d hello-world

$ docker run --name nginx-container -d nginx
$ docker images
$ docker ps -a
$ docker exec -it nginx-container bin/bash
root@df05b7fd4c3c:/# curl http://localhost:80

$ docker ps
CONTAINER ID   IMAGE     COMMAND    CREATED      STATUSPORTS     NAMES
df05b7fd4   nginx "/dockert.…"   8 min   Up 8 min  80/tcp nginx-container
docker stop df05b
docker ps
docker ps -a
docker rm df0f5b
docker ps -a
docker run --name nginx-cotainer -d -p 8080:80 nginx

sample Dockerfile

FROM openjdk:17
ADD spring-boot-docker-complete-0.0.1-SNAPSHOT.jar test.jar
EXPOSE 8081
ENTRYPOINT ["java" ,"-jar" ,"test.jar"]

$ ls
Dockerfile      spring-boot-docker-complete-0.0.1-SNAPSHOT.jar
$ docker build . -t spring-hello-world:v1

Step 1/4 : FROM openjdk:17
17: Pulling from library/openjdk
Status: Downloaded newer image for openjdk:17
Step 2/4 : ADD spring-boot-docker-complete-0.0.1-SNAPSHOT.jar test.jar
Step 3/4 : EXPOSE 8081
Step 4/4 : ENTRYPOINT ["java","-jar","test.jar"]

docker images
$ docker run --name aryan-container -d -p 8080:8081 spring-hello-world:v1
$ docker ps -a
$ docker build --help

push image on docker hub

$ docker ps
$ docker tag spring-hello-world:v1 aryan3singh/aryan-repo
$ docker login 
Username: aryan3singh
Password: 
$ docker images
$ docker push aryan3singh/aryan-repo:latest

Docker Compose

docker-compose.yaml

version: "3.7"

services:
  mysqldb:
    image: mysql:8.0
    restart: unless-stopped
    environment: 
      - MYSQL_ROOT_PASSWORD=root
      - MYSQL_USER=ritam
      - MYSQL_PASSWORD=ritam
      - MYSQL_DATABASE=testdb
    ports:
      - 3306:3306
    volumes:
      - db:/var/lib/mysql
  app:
    depends_on:
      - mysqldb
    build: .
    restart: on-failure
    ports:
      - 8080:8080
    environment: 
      SPRING_APPLICATION_JSON: '{
          "spring.datasource.url" : "jdbc:mysql://mysqldb:3306/testdb?allowPublicKeyRetrieval=true&useSSL=false",
          "spring.datasource.username" : "ritam",
          "spring.datasource.password" : "ritam",
          "spring.jpa.properties.hibernate.dialect" : "org.hibernate.dialect.MySQL5InnoDBDialect",
          "spring.jpa.hibernate.ddl-auto": "create"
        }'
      
volumes:
  db:    
      

$ ls
Dockerfile  docker-compose.yaml   first-springboot-app-0.0.1-SNAPSHOT.jar
$ docker compose up -d
$ docker ps