Class: Beaker::SshConnection
- Inherits:
-
Object
- Object
- Beaker::SshConnection
- Defined in:
- lib/beaker/ssh_connection.rb
Constant Summary collapse
- RETRYABLE_EXCEPTIONS =
[ SocketError, Timeout::Error, Errno::ETIMEDOUT, Errno::EHOSTDOWN, Errno::EHOSTUNREACH, Errno::ECONNREFUSED, Errno::ECONNRESET, Errno::ENETUNREACH, Net::SSH::Disconnect, Net::SSH::AuthenticationFailed, IOError, ]
Instance Attribute Summary collapse
-
#logger ⇒ Object
Returns the value of attribute logger.
Class Method Summary collapse
Instance Method Summary collapse
-
#close ⇒ Object
closes this SshConnection.
-
#connect ⇒ Object
connect to the host.
- #execute(command, options = {}, stdout_callback = nil, stderr_callback = stdout_callback) ⇒ Object
-
#initialize(hostname, user = nil, ssh_opts = {}, options = {}) ⇒ SshConnection
constructor
A new instance of SshConnection.
- #process_stdin_for(channel, stdin) ⇒ Object
- #register_exit_code_for(channel, output) ⇒ Object
- #register_stderr_for(channel, output, callback = nil) ⇒ Object
- #register_stdout_for(channel, output, callback = nil) ⇒ Object
- #request_terminal_for(channel, command) ⇒ Object
- #scp_from(source, target, options = {}, dry_run = false) ⇒ Object
- #scp_to(source, target, options = {}, dry_run = false) ⇒ Object
- #try_to_execute(command, options = {}, stdout_callback = nil, stderr_callback = stdout_callback) ⇒ Object
Constructor Details
#initialize(hostname, user = nil, ssh_opts = {}, options = {}) ⇒ SshConnection
Returns a new instance of SshConnection.
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# File 'lib/beaker/ssh_connection.rb', line 24 def initialize hostname, user = nil, ssh_opts = {}, = {} @hostname = hostname @user = user @ssh_opts = ssh_opts @logger = [:logger] @options = end |
Instance Attribute Details
#logger ⇒ Object
Returns the value of attribute logger.
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# File 'lib/beaker/ssh_connection.rb', line 8 def logger @logger end |
Class Method Details
.connect(hostname, user = 'root', ssh_opts = {}, options = {}) ⇒ Object
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# File 'lib/beaker/ssh_connection.rb', line 32 def self.connect hostname, user = 'root', ssh_opts = {}, = {} connection = new hostname, user, ssh_opts, connection.connect connection end |
Instance Method Details
#close ⇒ Object
closes this SshConnection
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# File 'lib/beaker/ssh_connection.rb', line 62 def close begin if @ssh and not @ssh.closed? @ssh.close else @logger.warn("ssh.close: connection is already closed, no action needed") end rescue *RETRYABLE_EXCEPTIONS => e @logger.warn "Attemped ssh.close, (caught #{e.class.name} - #{e.})." rescue => e @logger.warn "ssh.close threw unexpected Error: #{e.class.name} - #{e.}. Shutting down, and re-raising error below" @ssh.shutdown! raise e ensure @ssh = nil @logger.warn("ssh connection to #{@hostname} has been terminated") end end |
#connect ⇒ Object
connect to the host
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# File 'lib/beaker/ssh_connection.rb', line 39 def connect try = 1 last_wait = 0 wait = 1 @ssh ||= begin @logger.debug "Attempting ssh connection to #{@hostname}, user: #{@user}, opts: #{@ssh_opts}" Net::SSH.start(@hostname, @user, @ssh_opts) rescue *RETRYABLE_EXCEPTIONS => e if try <= 11 @logger.warn "Try #{try} -- Host #{@hostname} unreachable: #{e.class.name} - #{e.}" @logger.warn "Trying again in #{wait} seconds" sleep wait (last_wait, wait) = wait, last_wait + wait try += 1 retry else @logger.error "Failed to connect to #{@hostname}" raise end end end |
#execute(command, options = {}, stdout_callback = nil, stderr_callback = stdout_callback) ⇒ Object
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# File 'lib/beaker/ssh_connection.rb', line 119 def execute command, = {}, stdout_callback = nil, stderr_callback = stdout_callback try = 1 wait = 1 last_wait = 0 begin # ensure that we have a current connection object connect result = try_to_execute(command, , stdout_callback, stderr_callback) rescue *RETRYABLE_EXCEPTIONS => e if try < 11 sleep wait (last_wait, wait) = wait, last_wait + wait try += 1 @logger.error "Command execution '#{@hostname}$ #{command}' failed (#{e.class.name} - #{e.})" close @logger.debug "Preparing to retry: closed ssh object" retry else raise end end result end |
#process_stdin_for(channel, stdin) ⇒ Object
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# File 'lib/beaker/ssh_connection.rb', line 180 def process_stdin_for channel, stdin # queue stdin data, force it to packets, and signal eof: this # triggers action in many remote commands, notably including # 'puppet apply'. It must be sent at some point before the rest # of the action. channel.send_data stdin.to_s channel.process channel.eof! end |
#register_exit_code_for(channel, output) ⇒ Object
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# File 'lib/beaker/ssh_connection.rb', line 174 def register_exit_code_for channel, output channel.on_request("exit-status") do |ch, data| output.exit_code = data.read_long end end |
#register_stderr_for(channel, output, callback = nil) ⇒ Object
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# File 'lib/beaker/ssh_connection.rb', line 164 def register_stderr_for channel, output, callback = nil channel.on_extended_data do |ch, type, data| if type == 1 callback[data] if callback output.stderr << data output.output << data end end end |
#register_stdout_for(channel, output, callback = nil) ⇒ Object
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# File 'lib/beaker/ssh_connection.rb', line 156 def register_stdout_for channel, output, callback = nil channel.on_data do |ch, data| callback[data] if callback output.stdout << data output.output << data end end |
#request_terminal_for(channel, command) ⇒ Object
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# File 'lib/beaker/ssh_connection.rb', line 145 def request_terminal_for channel, command channel.request_pty do |ch, success| if success @logger.info "Allocated a PTY on #{@hostname} for #{command.inspect}" else abort "FAILED: could not allocate a pty when requested on " + "#{@hostname} for #{command.inspect}" end end end |
#scp_from(source, target, options = {}, dry_run = false) ⇒ Object
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# File 'lib/beaker/ssh_connection.rb', line 215 def scp_from source, target, = {}, dry_run = false return if dry_run local_opts = .dup if local_opts[:recursive].nil? local_opts[:recursive] = true end local_opts[:chunk_size] ||= 16384 result = Result.new(@hostname, [source, target]) result.stdout = "\n" @ssh.scp.download! source, target, local_opts do |ch, name, sent, total| result.stdout << "\tcopying %s: %10d/%d\n" % [name, sent, total] end # Setting these values allows reporting via result.log(test_name) result.stdout << " SCP'ed file #{@hostname}:#{source} to #{target}" # Net::Scp always returns 0, so just set the return code to 0. result.exit_code = 0 result.finalize! result end |
#scp_to(source, target, options = {}, dry_run = false) ⇒ Object
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# File 'lib/beaker/ssh_connection.rb', line 190 def scp_to source, target, = {}, dry_run = false return if dry_run local_opts = .dup if local_opts[:recursive].nil? local_opts[:recursive] = File.directory?(source) end local_opts[:chunk_size] ||= 16384 result = Result.new(@hostname, [source, target]) result.stdout = "\n" @ssh.scp.upload! source, target, local_opts do |ch, name, sent, total| result.stdout << "\tcopying %s: %10d/%d\n" % [name, sent, total] end # Setting these values allows reporting via result.log(test_name) result.stdout << " SCP'ed file #{source} to #{@hostname}:#{target}" # Net::Scp always returns 0, so just set the return code to 0. result.exit_code = 0 result.finalize! return result end |
#try_to_execute(command, options = {}, stdout_callback = nil, stderr_callback = stdout_callback) ⇒ Object
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# File 'lib/beaker/ssh_connection.rb', line 81 def try_to_execute command, = {}, stdout_callback = nil, stderr_callback = stdout_callback result = Result.new(@hostname, command) # why are we getting to this point on a dry run anyways? # also... the host creates connections through the class method, # which automatically connects, so you can't do a dry run unless you also # can connect to your hosts? return result if [:dry_run] @ssh.open_channel do |channel| request_terminal_for( channel, command ) if [:pty] channel.exec(command) do |terminal, success| abort "FAILED: to execute command on a new channel on #{@hostname}" unless success register_stdout_for terminal, result, stdout_callback register_stderr_for terminal, result, stderr_callback register_exit_code_for terminal, result process_stdin_for( terminal, [:stdin] ) if [:stdin] end end # Process SSH activity until we stop doing that - which is when our # channel is finished with... begin @ssh.loop rescue *RETRYABLE_EXCEPTIONS => e # this would indicate that the connection failed post execution, since the channel exec was successful @logger.warn "ssh channel on #{@hostname} received exception post command execution #{e.class.name} - #{e.}" close end result.finalize! @logger.last_result = result result end |