git clone https://github.com/vsuzdaltsev/check_remote.git
cd check_remote
gem install bundler
bundle install
irb
irb(main):001:0> load 'lib/check_remote.rb'
=> true
irb(main):002:0> check = CheckRemote.new
=> #<CheckRemote:0x00000001fb5b20 @opts={:host=>"127.0.0.1", :check_type=>"ssh", :timeout=>1, :sleep=>1, :tries=>3}, @check=#<SshServiceManager:0x00000001fb4b80 @service=#<Service:0x00000001fb59e0 @host="127.0.0.1", @check_type="ssh", @timeout=1, @sleep=1, @tries=3, @port=22>, @remote="127.0.0.1:22/tcp">>
irb(main):003:0> check.wait_until_up
[2018-10-25T16:42:18+03:00] WARN: Trying to check if ssh service up
[2018-10-25T16:42:18+03:00] WARN: * Waiting for connection to 127.0.0.1:22/tcp..
[2018-10-25T16:42:19+03:00] WARN: * Waiting for connection to 127.0.0.1:22/tcp..
[2018-10-25T16:42:20+03:00] WARN: * Waiting for connection to 127.0.0.1:22/tcp..
[2018-10-25T16:42:21+03:00] ERROR: * Failed to connect! 127.0.0.1:22/tcp is unreachable after 3 tries.
=> false
sudo systemctl start sshd
irb
irb(main):001:0> load 'lib/check_remote.rb' => true
irb(main):002:0> check = CheckRemote.new
=> #<CheckRemote:0x00000001f15198 @opts={:host=>"127.0.0.1", :check_type=>"ssh", :timeout=>1, :sleep=>1, :tries=>3}, @check=#<SshServiceManager:0x00000001f0e6e0 @service=#<Service:0x00000001f14478 @host="127.0.0.1", @check_type="ssh", @timeout=1, @sleep=1, @tries=3, @port=22>, @remote="127.0.0.1:22/tcp">> irb(main):003:0> check.wait_until_up
[2018-10-26T01:09:52+03:00] WARN: Trying to check if ssh service up [2018-10-26T01:09:52+03:00] WARN: * Successfully connected! 127.0.0.1:22/tcp is reachable
=> true