docker 中的 Jenkins slave 拒绝 SSH key

Question

我在 docker 容器中运行 Jenkins。在另一个 docker 容器中分离节点时，我收到以下消息:

[11/18/16 20:46:21] [SSH] Opening SSH connection to 192.168.99.100:32826.
ERROR: Server rejected the 1 private key(s) for Jenkins (credentialId:528bbe19-eb26-4c9f-bae3-82cd1247d50a/method:publickey)
[11/18/16 20:46:22] [SSH] Authentication failed.
hudson.AbortException: Authentication failed.
    at hudson.plugins.sshslaves.SSHLauncher.openConnection(SSHLauncher.java:1217)
    at hudson.plugins.sshslaves.SSHLauncher$2.call(SSHLauncher.java:711)
    at hudson.plugins.sshslaves.SSHLauncher$2.call(SSHLauncher.java:706)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)
[11/18/16 20:46:22] Launch failed - cleaning up connection
[11/18/16 20:46:22] [SSH] Connection closed.

使用 docker exec -i -t slave_name /bin/bash命令我可以进入 home/jenkins/.ssh 目录以确认 ssh key 是预期的位置。

在我的配置页面上的 CLOUD 标题下，测试连接返回

Version = 1.12.3, API Version = 1.24

.

我正在运行 OSX Sierra 并尝试遵循 RIOT Games Jenkins-Docker 教程 http://engineering.riotgames.com/news/building-jenkins-inside-ephemeral-docker-container .

Jenkins Master Docker 文件:

FROM debian:jessie

# Create the jenkins user
RUN useradd -d "/var/jenkins_home" -u 1000 -m -s /bin/bash jenkins

# Create the folders and volume mount points
RUN mkdir -p /var/log/jenkins
RUN chown -R jenkins:jenkins /var/log/jenkins
VOLUME ["/var/log/jenkins", "/var/jenkins_home"]

USER jenkins
CMD ["echo", "Data container for Jenkins"]

Jenkins 奴隶 Dockerfile

FROM centos:7

# Install Essentials
RUN yum update -y && yum clean all

# Install Packages
RUN yum install -y git \
    && yum install -y wget \
    && yum install -y openssh-server \
    && yum install -y java-1.8.0-openjdk \
    && yum install -y sudo \
    && yum clean all

# gen dummy keys, centos doesn't autogen them.
RUN /usr/bin/ssh-keygen -A

# Set SSH Configuration to allow remote logins without /proc write access
RUN sed -ri 's/^session\s+required\s+pam_loginuid.so$/session optional \
    pam_loginuid.so/' /etc/pam.d/sshd

# Create Jenkins User
RUN useradd jenkins -m -s /bin/bash

# Add public key for Jenkins login
RUN mkdir /home/jenkins/.ssh
COPY /files/authorized_keys /home/jenkins/.ssh/authorized_keys
RUN chown -R jenkins /home/jenkins
RUN chgrp -R jenkins /home/jenkins
RUN chmod 600 /home/jenkins/.ssh/authorized_keys
RUN chmod 700 /home/jenkins/.ssh

# Add the jenkins user to sudoers
RUN echo "jenkins  ALL=(ALL)  ALL" >> etc/sudoers

# Set Name Servers to avoid Docker containers struggling to route or resolve DNS names.
COPY /files/resolv.conf /etc/resolv.conf

# Expose SSH port and run SSHD
EXPOSE 22
CMD ["/usr/sbin/sshd","-D"]

我一直在与另一个人一起在一个被困在同一个地方的 Linux 机器上做同样的教程。任何帮助，将不胜感激。

Answer 1

您遇到的问题可能与主机的交互式授权有关。尝试将以下命令添加到您的奴隶的 Dockerfile

RUN ssh-keyscan -H 192.168.99.100 >> /home/jenkins/.ssh/known_hosts

请务必在创建 jenkins 用户后添加它，最好是在

USER jenkins

以避免错误的文件所有权。

还要确保在主控主机在线时执行此操作，否则它会告诉您主机无法访问。如果不能，请获取 known_hosts手动完成后从从属文件中提取文件并将其复制到您的从属文件中。

您可以验证这一点。如果您将控制台连接到 docker 从站并通过 ssh 连接到主站，它将要求您信任服务器并将其添加到已知主机。