我是码头工人的新手。我只是试着在我的本地机器(Ubuntu 16.04)上使用docker和Jenkins。
我用下面的管道脚本配置了一个新作业。
node {
stage('Build') {
docker.image('maven:3.3.3').inside {
sh 'mvn --version'
}
}
}
但是它失败了，错误如下:
在unix:///var/run/ Docker .sock试图连接到Docker守护进程套接字时被拒绝
当前回答
我使用的是官方的jenkins docker映像(https://hub.docker.com/r/jenkins/jenkins)，但我认为这个解决方案适用于我们想要在docker容器中运行docker的大多数用例。
在Docker容器中使用Docker的推荐方法是使用主机系统的Docker守护进程。这方面的好文章:https://itnext.io/docker-in-docker-521958d34efd。
处理权限问题的秘诀是在容器内为容器的用户添加权限，而不是为主机系统添加权限。默认情况下只有root用户有权限这样做，所以
docker exec -it -u root <container-name> bash
usermod -a -G docker <username>
我会做的。记得重新启动容器。
我想最简单的方法是创建一个定制的Dockerfile:
# Official jenkins image
FROM jenkins/jenkins:lts
# Swith to root to be able to install Docker and modify permissions
USER root
RUN apt-get update
# Install docker
RUN curl -sSL https://get.docker.com/ | sh
# Add jenkins user to docker group
RUN usermod -a -G docker jenkins
# Switch back to default user
USER jenkins
# Bild the image:
# sudo docker build -t yourusername/imagename .
# Run the image and mount with the followin bind mount option:
# sudo docker run --name imagename -d -p8080:8080 -v /var/run/docker.sock:/var/run/docker.sock yourusername/imagename
其他回答
在做生产配置时，我得到了权限问题。我尝试下面的解决方案来解决这个问题。
错误消息
ubuntu@node1:~$ docker run hello-world
docker: Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Post http://%2Fvar%2Frun%2Fdocker.sock/v1.38/containers/create: dial unix /var/run/docker.sock: connect: permission denied.
See 'docker run --help'.
解决方法:错误消息/var/run/docker.sock中socket的权限:
ubuntu@ip-172-31-21-106:/var/run$ ls -lrth docker.sock
srw-rw---- 1 root root 0 Oct 17 11:08 docker.sock
ubuntu@ip-172-31-21-106:/var/run$ sudo chmod 666 /var/run/docker.sock
ubuntu@ip-172-31-21-106:/var/run$ ls -lrth docker.sock
srw-rw-rw- 1 root root 0 Oct 17 11:08 docker.sock
更改docket权限后。Sock然后执行以下命令检查权限。
ubuntu@ip-172-31-21-106:/var/run$ docker run hello-world
Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
1b930d010525: Pull complete
Digest: sha256:c3b4ada4687bbaa170745b3e4dd8ac3f194ca95b2d0518b417fb47e5879d9b5f
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/
我有Jenkins在Docker中运行，并连接Jenkins从主机Ubuntu 16.04通过卷到/var/run/docker.sock使用Docker套接字。
对我来说，解决方案是:
1) Jenkins的Docker容器内部(Docker exec - Jenkins bash on host machine)
usermod -a -G docker jenkins
chmod 664 /var/run/docker.sock
service jenkins restart (or systemctl restart jenkins.service)
su jenkins
2)主机上:
sudo service docker restart
664表示-对组中的所有者和用户进行读写(但不执行)。
我将jenkins用户添加到根组，并重新启动jenkins，它开始工作。
sudo usermod -a -G root jenkins
sudo service jenkins restart
在我的例子中，它只是启动docker服务:
sudo service docker start
使用下面的dockerfile
FROM jenkins/jenkins
USER root
# 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") \
$(lsb_release -cs) \
stable" && \
apt-get update && \
apt-get -y install docker-ce
# Compose
RUN curl -L "https://github.com/docker/compose/releases/download/1.22.0/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose && chmod +x /usr/local/bin/docker-compose
RUN usermod -aG docker jenkins
RUN usermod -aG root jenkins
USER jenkins
