Question

我正在设置简单的capistrano 3部署脚本，以便为每个由aws autoscaler生成的新节点运行rc.local。

当我以root身份手动执行脚本时，一切运行正常，但是一旦我重新启动并查看rc.local执行日志，我就会得到以下信息：

cap aborted!
SSHKit::Runner::ExecuteError: Exception while executing on host 127.0.0.1: Authentication failed for user ubuntu@127.0.0.1
/var/lib/gems/1.9.1/gems/net-ssh-2.9.1/lib/net/ssh.rb:219:in `start'
/var/lib/gems/1.9.1/gems/sshkit-1.5.1/lib/sshkit/backends/connection_pool.rb:50:in `call'
/var/lib/gems/1.9.1/gems/sshkit-1.5.1/lib/sshkit/backends/connection_pool.rb:50:in `create_new_entry'
/var/lib/gems/1.9.1/gems/sshkit-1.5.1/lib/sshkit/backends/connection_pool.rb:22:in `checkout'
/var/lib/gems/1.9.1/gems/sshkit-1.5.1/lib/sshkit/backends/netssh.rb:179:in `with_ssh'
/var/lib/gems/1.9.1/gems/sshkit-1.5.1/lib/sshkit/backends/netssh.rb:131:in `block in _execute'
/var/lib/gems/1.9.1/gems/sshkit-1.5.1/lib/sshkit/backends/netssh.rb:128:in `tap'
/var/lib/gems/1.9.1/gems/sshkit-1.5.1/lib/sshkit/backends/netssh.rb:128:in `_execute'
/var/lib/gems/1.9.1/gems/sshkit-1.5.1/lib/sshkit/backends/netssh.rb:66:in `execute'
/var/lib/gems/1.9.1/gems/capistrano-3.2.1/lib/capistrano/tasks/git.rake:17:in `block (3 levels) in <top (required)>'
/var/lib/gems/1.9.1/gems/sshkit-1.5.1/lib/sshkit/backends/netssh.rb:54:in `instance_exec'
/var/lib/gems/1.9.1/gems/sshkit-1.5.1/lib/sshkit/backends/netssh.rb:54:in `run'
/var/lib/gems/1.9.1/gems/sshkit-1.5.1/lib/sshkit/runners/parallel.rb:13:in `block (2 levels) in execute'
Net::SSH::AuthenticationFailed: Authentication failed for user ubuntu@127.0.0.1
/var/lib/gems/1.9.1/gems/net-ssh-2.9.1/lib/net/ssh.rb:219:in `start'
/var/lib/gems/1.9.1/gems/sshkit-1.5.1/lib/sshkit/backends/connection_pool.rb:50:in `call'
/var/lib/gems/1.9.1/gems/sshkit-1.5.1/lib/sshkit/backends/connection_pool.rb:50:in `create_new_entry'
/var/lib/gems/1.9.1/gems/sshkit-1.5.1/lib/sshkit/backends/connection_pool.rb:22:in `checkout'
/var/lib/gems/1.9.1/gems/sshkit-1.5.1/lib/sshkit/backends/netssh.rb:179:in `with_ssh'
/var/lib/gems/1.9.1/gems/sshkit-1.5.1/lib/sshkit/backends/netssh.rb:131:in `block in _execute'
/var/lib/gems/1.9.1/gems/sshkit-1.5.1/lib/sshkit/backends/netssh.rb:128:in `tap'
/var/lib/gems/1.9.1/gems/sshkit-1.5.1/lib/sshkit/backends/netssh.rb:128:in `_execute'
/var/lib/gems/1.9.1/gems/sshkit-1.5.1/lib/sshkit/backends/netssh.rb:66:in `execute'
/var/lib/gems/1.9.1/gems/capistrano-3.2.1/lib/capistrano/tasks/git.rake:17:in `block (3 levels) in <top (required)>'
/var/lib/gems/1.9.1/gems/sshkit-1.5.1/lib/sshkit/backends/netssh.rb:54:in `instance_exec'
/var/lib/gems/1.9.1/gems/sshkit-1.5.1/lib/sshkit/backends/netssh.rb:54:in `run'
/var/lib/gems/1.9.1/gems/sshkit-1.5.1/lib/sshkit/runners/parallel.rb:13:in `block (2 levels) in execute'
Tasks: TOP => git:check => git:wrapper
(See full trace by running task with --trace)
The deploy has failed with an error: #<SSHKit::Runner::ExecuteError: Exception while executing on host 127.0.0.1: Authentication failed for user ubuntu@127.0.0.1>

为了避免known_hosts问题，root用户有〜/ .ssh / config

Host 127.0.0.1
    StrictHostKeyChecking no
    UserKnownHostsFile=/dev/null

以root用户身份

ssh ubuntu@127.0.0.1

很顺利。

rc.local看起来像这样：

#!/bin/bash -ex
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing.

exec > >(tee /var/log/rc.local.log|logger -t rc.local -s 2>/dev/console) 2>&1

/home/ubuntu/deployment/local-deploy.sh

exit 0

如上所述以root用户身份运行/home/ubuntu/deployment/local-deploy.sh手动工作正常，但是当它在启动时运行时（来自rc.local）我得到上面的身份验证错误。

感谢您的帮助。

Answer 1

我终于通过向ubuntu用户起诉然后执行命令解决了这个问题：

su ubuntu -c '...'

来自rc.local ssh身份验证的Capistrano失败了

1 个答案: