无法通过gem“ ssh-net”运行Ruby脚本

Question

I am using gem net-ssh .

The connection is established. I am able to run some simple scripts(like "pwd", "ls", etc.) successfully, but when I run the "restart" script I get an error.

Here is a snippet:

output = ssh.exec!("cd /home/csrhub/git/csrhub-api; ./bin/restart")
puts "#{output}"

And the output:

./bin/restart:7:in exec': No such file or directory - bundle (Errno::ENOENT) from ./bin/restart:7:in ' Environment determined as "development" based on the .environment file. Loading application.yml

And here is the script where the error occurs.

#!/usr/bin/env ruby

require 'yaml'
require_relative '../app/models/environment.rb'
config = Environment.config('application')

exec "bundle exec pumactl --control-url tcp://127.0.0.1:#{config['control_port']} --control-token #{config['control_token']} phased-restart"

Connecting via Putty , when I run the same command it gets executed without any problems.

EDIT

The PATH variable is different when I Putty:

/home/csrhub/.rbenv/shims:/home/csrhub/.rbenv/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin

And when I run with net-ssh PATH is:

/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games

Answer 1

The problem is in your ssh.exec! call. Net::SSH does not use a login shell to run your commands. A login shell is required for Bash to execute .bash_profile .

Since your rbenv setup is in .bash_profile , your exec! call will be missing your full Ruby environment, and therefore running bundle later in you restart script will fail.

The solution should be to manually execute .bash_profile , so that rbenv gets loaded:

output = ssh.exec!("source ~/.bash_profile; ...rest of commands...")

More information and other proposals here:
net-ssh and remote environment