Docker, Kubectl 설치

Docker 설치

1. 기존 버전 삭제

sudo apt-get remove docker docker-engine docker.io containerd runc

2. repo 설정

sudo apt-get update

sudo apt-get install \
    ca-certificates \
    curl \
    gnupg \
    lsb-release

3. Docker key 등록

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg

4. repo 등록

 echo \
  "deb [arch=amd64 signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/ubuntu \
  $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

5. 설치

sudo apt-get update
sudo apt-get install docker-ce docker-ce-cli containerd.io

# 설치 확인
docker --version
# 결과
Docker version 20.10.21, build baeda1f


# hello-world 실행 해보기
sudo docker run hello-world
# 결과
Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
2db29710123e: Pull complete 
Digest: sha256:e18f0a777aefabe047a671ab3ec3eed05414477c951ab1a6f352a06974245fe7
Status: Downloaded newer image for hello-world:latest

Hello from Docker!
This message shows that your installation appears to be working correctly.

To generate this message, Docker took the following steps:
 1. The Docker client contacted the Docker daemon.
 2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
    (amd64)
 3. The Docker daemon created a new container from that image which runs the
    executable that produces the output you are currently reading.
 4. The Docker daemon streamed that output to the Docker client, which sent it
    to your terminal.

To try something more ambitious, you can run an Ubuntu container with:
 $ docker run -it ubuntu bash

Share images, automate workflows, and more with a free Docker ID:
 https://hub.docker.com/

For more examples and ideas, visit:
 https://docs.docker.com/get-started/

Docker Compose 설치

Compose는 도커 어플리케이션 컨테이너들을 정의하고 실행을 도와주는 툴 입니다. YAML 파일을 사용해 어플리케이션의 서비스를 설정하고 하나의 커맨드만으로 여러개의 도커 컨테이너들을 사용 할 수 있습니다.
Docker 를 설치해도 Compose는 따로 설치가 필요합니다.

sudo curl -L "https://github.com/docker/compose/releases/download/1.29.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose

 sudo chmod +x /usr/local/bin/docker-compose
 
 # 버전 확인
 docker-compose --version

Docker socket 권한 설정

sudo usermod -a -G docker $USER   #경우에 따라 dockerroot로 설정
sudo chmod 777 /var/run/docker.sock
sudo chown root:docker /var/run/docker.sock

Kubectl 설치

sudo apt-get update
sudo apt-get install -y apt-transport-https ca-certificates curl

sudo apt-get install -y apt-transport-https

# 구글 클라우드 공개 사이닝 키를 다운로드한다.
sudo curl -fsSLo /usr/share/keyrings/kubernetes-archive-keyring.gpg https://packages.cloud.google.com/apt/doc/apt-key.gpg

# 쿠버네티스 apt 리포지터리를 추가한다.
echo "deb [signed-by=/usr/share/keyrings/kubernetes-archive-keyring.gpg] https://apt.kubernetes.io/ kubernetes-xenial main" | sudo tee /etc/apt/sources.list.d/kubernetes.list

# 새 리포지터리의 apt 패키지 색인을 업데이트하고 kubectl을 설치한다.
sudo apt-get update
sudo apt-get install -y kubectl

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