남는건 기록 뿐

docker run -p 8080:8080 \
  -v /var/run/docker.sock:/var/run/docker.sock \
  --name jenkins \
  jenkins/jenkins:lts

docker exec -it -u root jenkins bash

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

출처 : https://getintodevops.com/blog/the-simple-way-to-run-docker-in-docker-for-ci

권한 문제가 발생할 것이다.

jenkins docker 안에서 

usermod -aG docker jenkins 

chmod 666 /var/run/docker.sock

해주자.