我的 Jenkins 主服务器在本地运行，我的从属服务器在 AWS 上运行。它是 Centos 7 EC2 虚拟机。
当 Jenkins 尝试通过 scp 推送 Slave.jar 文件时，它会失败并显示以下错误消息：
java.io.IOException: Could not open channel (state:4)
at com.trilead.ssh2.channel.ChannelManager.ioException(ChannelManager.java:1543)
at com.trilead.ssh2.channel.ChannelManager.waitUntilChannelOpen(ChannelManager.java:122)
at com.trilead.ssh2.channel.ChannelManager.openSessionChannel(ChannelManager.java:574)
at com.trilead.ssh2.Session.<init>(Session.java:42)
at com.trilead.ssh2.Connection.openSession(Connection.java:1145)
at com.trilead.ssh2.SFTPv3Client.<init>(SFTPv3Client.java:99)
at com.trilead.ssh2.SFTPv3Client.<init>(SFTPv3Client.java:119)
at hudson.plugins.sshslaves.SFTPClient.<init>(SFTPClient.java:43)
at hudson.plugins.sshslaves.SSHLauncher.copySlaveJar(SSHLauncher.java:1138)
at hudson.plugins.sshslaves.SSHLauncher.access$400(SSHLauncher.java:148)
at hudson.plugins.sshslaves.SSHLauncher$2.call(SSHLauncher.java:833)
at hudson.plugins.sshslaves.SSHLauncher$2.call(SSHLauncher.java:810)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.io.IOException: The server refused to open the channel (SSH_OPEN_ADMINISTRATIVELY_PROHIBITED, 'open failed')
at com.trilead.ssh2.channel.Channel.setReasonClosed(Channel.java:331)
at com.trilead.ssh2.channel.ChannelManager.msgChannelOpenFailure(ChannelManager.java:1392)
at com.trilead.ssh2.channel.ChannelManager.handleMessage(ChannelManager.java:1484)
at com.trilead.ssh2.transport.TransportManager.receiveLoop(TransportManager.java:809)
at com.trilead.ssh2.transport.TransportManager$1.run(TransportManager.java:502)
... 1 more
java.io.IOException: Could not copy slave.jar into '/home/nutanix' on slave
at hudson.plugins.sshslaves.SSHLauncher.copySlaveJarUsingSCP(SSHLauncher.java:1222)
at hudson.plugins.sshslaves.SSHLauncher.copySlaveJar(SSHLauncher.java:1183)
at hudson.plugins.sshslaves.SSHLauncher.access$400(SSHLauncher.java:148)
at hudson.plugins.sshslaves.SSHLauncher$2.call(SSHLauncher.java:833)
at hudson.plugins.sshslaves.SSHLauncher$2.call(SSHLauncher.java:810)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.io.IOException: Could not open channel (state:4)
at com.trilead.ssh2.channel.ChannelManager.ioException(ChannelManager.java:1543)
at com.trilead.ssh2.channel.ChannelManager.waitUntilChannelOpen(ChannelManager.java:122)
at com.trilead.ssh2.channel.ChannelManager.openSessionChannel(ChannelManager.java:574)
at com.trilead.ssh2.Session.<init>(Session.java:42)
at com.trilead.ssh2.Connection.openSession(Connection.java:1145)
at com.trilead.ssh2.Connection.exec(Connection.java:1566)
at hudson.plugins.sshslaves.SSHLauncher.copySlaveJarUsingSCP(SSHLauncher.java:1216)
... 8 more
Caused by: java.io.IOException: The server refused to open the channel (SSH_OPEN_ADMINISTRATIVELY_PROHIBITED, 'open failed')
中提供的解决方案SSH 隧道错误：“通道 1：打开失败：管理禁止：打开失败”不适合我。
答案1
您可以检查以下几项内容或尝试解决此问题：
- 检查 AWS 中的安全组，确保您的 Jenkins 服务器能够通过 SSH 访问任何从属服务器。我猜你已经准备好了，但值得检查一下。
- 登录 Jenkins 服务器并尝试直接从命令行连接到 Slaver 服务器。确保您能够以这种方式连接且没有错误。然后，确认您要连接的用户与 Jenkins 尝试使用的用户是同一用户。在您的输出中，我看到“无法将slave.jar复制到slave上的'/home/nutanix'”。在里面用于连接到 Linux 实例的 AWS 文档，CentOS系统的用户名是森托斯。确保 Jenkins 配置为使用该用户名，并且有权访问以该用户身份登录所需的密钥。
- 考虑使用亚马逊 EC2 插件用于连接到 AWS 中的从站。使用该插件，大部分设置都在配置中完成，您无需在作业级别担心它。此外，从站将根据需要上下旋转，从而保持较低的 AWS 成本。