[실습] Jenkins & Dockerfile

1. Jenkins 설치

해당 실습은 Docker로 jenkins를 설치하는 방식으로 진행했습니다.

#!/bin/bash

# Update package index and install required packages for Docker
sudo yum update -y
sudo yum install -y tree
sudo yum install -y docker

# Start Docker service
sudo service docker start

# Add the current user to the docker group
sudo usermod -aG docker root
sudo usermod -aG docker ec2-user

# Restart Docker service to apply changes
sudo service docker restart

sudo docker run -d \
  -p 8888:8080 \
  -v ~/jenkins_home:/var/jenkins_home \
  -v /var/run/docker.sock:/var/run/docker.sock \
  --name jenkins \
  -u root \
  jenkins/jenkins:lts

 

# Jenkins 주소 확인
curl -s ipinfo.io/ip | awk '{ print "jenkins = http://"$1":8888" }'

 

 

 

#docker exec <CONTAINER_NAME> cat /var/jenkins_home/secrets/initialAdminPassword
docker exec jenkins cat /var/jenkins_home/secrets/initialAdminPassword

 

Jenkins 웹사이트 - JDK 세팅

# jenkins:lts의 java버전, 설치경로, JAVA_HOME 확인
docker exec jenkins java -version
docker exec jenkins which java
docker exec jenkins /bin/bash -c 'echo $JAVA_HOME'

 

• 첫번째 Item(Project) 생성
  • 새로운 Item 클릭 → Name : First-Project , Freestyle project ⇒ 하단 OK 클릭

Build Steps → Add build step ⇒ Execute shell 클릭

 

echo "Aws Workshop Study"
java -version
whoami
touch hello.txt

 

• 지금 빌드 클릭

 

 

2. Jenkins SCM - Git 연동

 

Github > https://github.com/gasida/aews-cicd.git 포크

GitHub - gasida/aews-cicd: cloudneta aws workshop study

 

 

 

fork 완료 (https://github.com/yeongki0944/aews-cicd)

 

 

Jenkins > Item > Freestyle 프로젝트 생성

 

Freestyle 프로젝트 > Configure > General > This project is parameterized

 String Parameter

• 빌드 매개변수 : String
  • 변수명(VERSION), Default Vault(v1.0.0)
  • 변수명(NICK), Default Vault(<자신의 계정명>)

SCM > Git 

• Repo URL : https://github.com/<자신의 계정명>/aews-cicd
• Branch : */main
• Additional Behaviours → Sparse Checkout paths (Path) : 1
•  

Repo URL, Branch 설정

Additional Behaviours &rarr; Sparse Checkout paths (Path) :&nbsp;1

 

 

Build Triggers

• 빌드 유발 : Poll SCM (* * * * *)

 

Build Steps

• Build Steps : Execute shell

cd /var/lib/jenkins/myweb2
rm -rf Dockerfile
wget <https://raw.githubusercontent.com/$NICK/aews-cicd/main/1/Dockerfile>

 

• Add build Steps : Execute shell

cd /var/lib/jenkins/myweb2
docker build -t myweb:$VERSION .
docker run -d -p 80:80 --rm --name myweb myweb:$VERSION

 

Github - 소스코드 수정

 

Jenkins #1 빌드  - 실패

원인 - 폴더가 없는데  cd로 이동하다 발생한 에러

 

 

Jenkins #2 빌드 - 실패

도커로 설치된 Jenkins에 wget이 설치되지 않아서 발생한 에러

 

• curl 명령어로 변경, docker image 수정, docker exec로 직접 설치

 

docker exec -it jeknins /bin/bash
apt-get update
apt-get install -y wget

# docker ce도 설치
apt-get update && \
apt-get -y install apt-transport-https \
     ca-certificates \
     curl \
     gnupg2 \
     software-properties-common && \
curl -fsSL https://download.docker.com/linux/$(. /etc/os-release; echo "$ID")/gpg > /tmp/dkey; apt-key add /tmp/dkey && \
add-apt-repository \
   "deb [arch=amd64] https://download.docker.com/linux/$(. /etc/os-release; echo "$ID") \
   $(lsb_release -cs) \
   stable" && \
apt-get update && \
apt-get -y install docker-ce


groupadd -f docker
usermod -aG docker jenkins
chown root:docker /var/run/docker.sock

 

 

Jenkins:lts 이미지에 wget, docker.sock 세팅하기

FROM jenkins/jenkins:lts

USER root

# Install wget
RUN apt-get update && \
    apt-get install -y wget

# Install Docker
RUN apt-get update && \
    apt-get -y install apt-transport-https \
         ca-certificates \
         curl \
         gnupg2 \
         software-properties-common && \
    curl -fsSL https://download.docker.com/linux/$(. /etc/os-release; echo "$ID")/gpg > /tmp/dkey && apt-key add /tmp/dkey && \
    add-apt-repository \
       "deb [arch=amd64] https://download.docker.com/linux/$(. /etc/os-release; echo "$ID") \
       $(lsb_release -cs) \
       stable" && \
    apt-get update && \
    apt-get -y install docker-ce

# Add jenkins user to docker group
RUN groupadd -f docker && \
    usermod -aG docker jenkins && \
    chown root:docker /var/run/docker.sock

USER jenkins

 

docker build -t dudrl0944/myjenkins:1.0.0 .

docker push dudrl0944/myjenkins:1.0.0

 

빌드 성공