Jenkins 代理 EC2 实例创建失败并出现 404 NOT FOUND 错误

Question

我一直在运行一个单独的 Agent Master EC2 实例，我们在其中运行所有作业。我正在考虑升级我们的解决方案并根据负载添加一些 Jenkins 代理。为此，我尝试使用 Jenkins 中提供的 EC2 插件。配置进展顺利，为了测试这一点，我将最小实例数设置为“1”。一旦代理初始化，Jenkins Master 就可以通过 SSH 连接到代理，但是一旦通过 SSH，它就会返回 404 错误并且实例被终止，我不知道为什么会发生这种情况。这是错误：

Nov 09, 2020 12:15:58 PM hudson.plugins.ec2.EC2Cloud
INFO: The SSH key **** has been successfully checked against the instance console for connections to EC2 (Jenkins Agent 1) - Jenkins Agent (****)
Nov 09, 2020 12:15:58 PM hudson.plugins.ec2.EC2Cloud
INFO: Connected via SSH.
Nov 09, 2020 12:15:58 PM hudson.plugins.ec2.EC2Cloud
INFO: connect fresh as root
Nov 09, 2020 12:15:58 PM hudson.plugins.ec2.EC2Cloud
INFO: Connecting to **** on port ****, with timeout 10000.
Nov 09, 2020 12:15:58 PM hudson.plugins.ec2.EC2Cloud
INFO: Connection allowed after the host key has been verified
Nov 09, 2020 12:15:58 PM hudson.plugins.ec2.EC2Cloud
INFO: Connected via SSH.
Nov 09, 2020 12:15:58 PM hudson.plugins.ec2.EC2Cloud
INFO: Creating tmp directory (/tmp) if it does not exist
Nov 09, 2020 12:16:03 PM hudson.plugins.ec2.EC2Cloud
INFO: Verifying: java -fullversion
openjdk full version "1.8.0_265-8u265-b01-0ubuntu2~20.04-b01"
Nov 09, 2020 12:16:03 PM hudson.plugins.ec2.EC2Cloud
INFO: Verifying: which scp
/usr/bin/scp
Nov 09, 2020 12:16:03 PM hudson.plugins.ec2.EC2Cloud
INFO: Copying remoting.jar to: /tmp
Nov 09, 2020 12:16:03 PM hudson.plugins.ec2.EC2Cloud
INFO: Launching remoting agent (via Trilead SSH2 Connection):  java  -jar /tmp/remoting.jar -workDir /var/lib/jenkins





HTTP ERROR 404 Not Found

URI:    /computer/EC2%20(Jenkins%20Agent%201)%20-%20Jenkins%20Agent%20(i-01c45e1be3ca4ab2f)/logText/progressiveHtml
STATUS: 404
MESSAGE:    Not Found
SERVLET:    Stapler

Powered by Jetty:// 9.4.30.v20200611

任何人都知道这是从哪里来的，或者之前使用 Jenkins 上的 EC2 插件有过这样的情况吗？

Answer 1

INFO: Verifying: which scp
/usr/bin/scp
Nov 09, 2020 12:16:03 PM hudson.plugins.ec2.EC2Cloud
INFO: Copying remoting.jar to: /tmp
Nov 09, 2020 12:16:03 PM hudson.plugins.ec2.EC2Cloud
INFO: Launching remoting agent (via Trilead SSH2 Connection):  java  -jar 
/tmp/remoting.jar -workDir /var/lib/jenkins

似乎 scp lib/package 已经安装/可用，但您使用的远程用户没有工作目录的权限，/var/lib/jenkins这就是它失败并且实例被终止的原因。如果您使用的是Amazon Linux 2 AMI，您可以选择用作/home/ec2-user 远程 FS 根（请参阅图像参考），或者/home/ubuntu如果您使用的是Ubuntu AMI