Question

当Packer到达＆＃34;等待SSH变得可用时......＆＃34;步骤

我的日志显示

14:07:29 [INFO] Attempting SSH connection...
14:07:29 reconnecting to TCP connection for SSH
14:07:29 handshaking with SSH
14:07:29 handshake error: ssh: handshake failed: read tcp 127.0.0.1:60372->127.0.0.1:3057: read: connection reset by peer
14:07:29 [DEBUG] SSH handshake err: ssh: handshake failed: read tcp 127.0.0.1:60372->127.0.0.1:3057: read: connection reset by peer

14:07:36 [INFO] Attempting SSH connection...
14:07:36 reconnecting to TCP connection for SSH
14:07:36 handshaking with SSH
14:07:36 handshake error: ssh: handshake failed: read tcp 127.0.0.1:60376->127.0.0.1:3057: read: connection reset by peer
14:07:36 [DEBUG] SSH handshake err: ssh: handshake failed: read tcp 127.0.0.1:60376->127.0.0.1:3057: read: connection reset by peer

每次尝试时请注意不同的端口。

60372
60376

Packer每7秒尝试一个新端口。

有没有办法在构建之前或期间配置端口以避免这种尝试/失败方法？

Answer 1

这是ssh连接的源端口。它由操作系统分配，具有随机可用的高端口。

Answer 2

问题不在于SSH服务器或TCP / IP。这与Packer的设计方式有关。

创建VM时，Packer.io将运行引导命令。不同的机器需要时间和时间。在此期间，您将看到“等待SSH可用......”。在后台，Packer.io将尝试建立SSH连接。日志已经饱和了这样的消息

Linux
14:07:29 [INFO] Attempting SSH connection...
14:07:29 reconnecting to TCP connection for SSH
14:07:29 handshaking with SSH
14:07:29 handshake error: ssh: handshake failed: read tcp 127.0.0.1:60372->127.0.0.1:3057: read: connection reset by peer
14:07:29 [DEBUG] SSH handshake err: ssh: handshake failed: read tcp    127.0.0.1:60372->127.0.0.1:3057: read: connection reset by peer

或

Windows
15:54:31 packer.exe: 2017/02/01 15:54:31 [INFO] Attempting SSH connection...
15:54:31 packer.exe: 2017/02/01 15:54:31 reconnecting to TCP connection for SSH
15:54:31 packer.exe: 2017/02/01 15:54:31 handshaking with SSH
15:54:31 packer.exe: 2017/02/01 15:54:31 handshake error: ssh: handshake failed: read tcp 127.0.0.1:62691->127.0.0.1:4289: wsarecv: An existing connection was forcibly closed by the remote host.
15:54:31 packer.exe: 2017/02/01 15:54:31 [DEBUG] SSH handshake err: ssh: handshake failed: read tcp 127.0.0.1:62691->127.0.0.1:4289: wsarecv: An existing connection was forcibly closed by the remote host.

操作系统将启动并随之启用客户端上的SSH服务器。此时，应该建立从主机到访客的SSH连接。

在Windows 10 Pro和Ubuntu 16.04.1 TL上重现并确认

尝试建立SSH连接时，Packer会通过端口循环

2 个答案: