DevOps를 위한 도커와 쿠버네티스 1-1. Docker Basics

root@devops:~# docker login

Login with your Docker ID to push and pull images from Docker Hub. If you don't have a Docker ID, head over to https://hub.docker.com to create one. Username: 아이디 입력 Password: 패스워드 입력 WARNING! Your password will be stored unencrypted in /root/.docker/config.json. Configure a credential helper to remove this warning. See https://docs.docker.com/engine/reference/commandline/login/#credentials-store   Login Succeeded

 

# Image가 도커에 탑재됐을 때 Container가 된다.

# Immutable 이미지를 만들고 그거 위에 새로운 걸 얹는 느낌

# Immutable 이미지에 IP 같은 것들은 들어가면 안됨

 

#Private host url

 

#Basic image

#Dockerfile … Docker build까지만 해주고, 나머지는 쿠버네티스 이용할 예정

 

 

root@labs--1234:/home/project/lab-env# pwd

/home/project/lab-env

root@labs--1234:/home/project/lab-env# mkdir DockerLab

root@labs--1234:/home/project/lab-env# cd DockerLab

 

root@labs--1234:/home/project/lab-env/DockerLab# vi index.html

Hi~ My name is Hong Gil Dong

 

root@labs--1234:/home/project/lab-env/DockerLab# vi Dockerfile

FROM nginx COPY index.html /usr/share/nginx/html/

 

#Dockerfile로 이미지 생성

root@labs--1234:/home/project/lab-env/DockerLab# docker build -t 도커아이디/my-nginx:v1 .

Sending build context to Docker daemon 3.072 kB Step 1/2 : FROM nginx latest: Pulling from library/nginx 33847f680f63: Pull complete dbb907d5159d: Pull complete 8a268f30c42a: Pull complete b10cf527a02d: Pull complete c90b090c213b: Pull complete 1f41b2f2bf94: Pull complete Digest: sha256:8f335768880da6baf72b70c701002b45f4932acae8d574dedfddaf967fc3ac90 Status: Downloaded newer image for nginx:latest  ---> 08b152afcfae Step 2/2 : COPY index.html /usr/share/nginx/html/  ---> 9a72d6ff453a Successfully built 9a72d6ff453a Successfully tagged 도커아이디/my-nginx:v1

 

#도커 이미지 목록 확인

root@labs--1234:/home/project/lab-env/DockerLab# docker images

REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE 도커아이디/my-nginx    v1                  9a72d6ff453a        27 seconds ago      133 MB nginx               latest              08b152afcfae        13 days ago         133 MB

 

# 도커 이미지 Push 1)

root@labs--1234:/home/project/lab-env/DockerLab# docker login

… Login Succeeded

# 도커 이미지 Push 2)

root@labs--1234:/home/project/lab-env/DockerLab# docker push 도커아이디/my-nginx:v1

The push refers to repository [docker.io/도커아이디/my-nginx] deea81dd057c: Pushed e3135447ca3e: Mounted from library/nginx b85734705991: Mounted from library/nginx 988d9a3509bb: Mounted from library/nginx 59b01b87c9e7: Mounted from library/nginx 7c0b223167b9: Mounted from library/nginx 814bff734324: Mounted from library/nginx v1: digest: sha256:ad4511eda68b63ab92dc2de4bc7bea38a06af47af376ce96c23e14ab1566a1a9 size: 1777

 

#컨테이너 실행

root@labs--1234:/home/project/lab-env/DockerLab# docker run --name=my-nginx -d -p 8072:80 도커아이디/my-nginx:v1

3e9bac040be41b7daa5ee1d5bde74e526db79ab052482593f7ced7aadb32916e

 

root@labs--1234:/home/project/lab-env/DockerLab# curl localhost:8072

Hi~ My name is Hong Gil Dong

 

#모든 컨테이너 한번에 삭제 (중지 후 삭제)

root@labs--1234:/home/project/lab-env/DockerLab# docker container rm $(docker ps -a -q)

Error response from daemon: You cannot remove a running container 3e9bac040be41b7daa5ee1d5bde74e526db79ab052482593f7ced7aadb32916e. Stop the container before attempting removal or force remove

 

# 컨테이너 종료

root@labs--1234:/home/project/lab-env/DockerLab# docker stop

3e9bac040be41b7daa5ee1d5bde74e526db79ab052482593f7ced7aadb32916e 3e9bac040be41b7daa5ee1d5bde74e526db79ab052482593f7ced7aadb32916e

 

#모든 컨테이너 한번에 삭제 (중지 후 삭제)

root@labs--1234:/home/project/lab-env/DockerLab# docker container rm $(docker ps -a -q)

3e9bac040be4

 

# 실행중인 컨테이너 확인

root@labs--1234:/home/project/lab-env/DockerLab# docker ps

CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES

 

root@labs--1234:/home/project/lab-env/DockerLab# docker run --name=my-nginx -d -p 8087:80 도커아이디/my-nginx:v19b5bf23d92f3581c67e1164873612ce7e149a5e12793011d734639cef4a730ff