(DataFlex) SSH Parallel Remote Commands on Multiple Servers

See more SSH Examples

Shows how to execute a command in parallel on multiple servers.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-win32.pkg

Procedure Test
    Handle hoSsh1
    Handle hoSsh2
    Handle hoSsh3
    Integer iPort
    Boolean iSuccess
    String sCmd
    Integer iSsh1Channel
    Integer iSsh2Channel
    Integer iSsh3Channel
    Integer iPollTimeoutMs
    Integer iNumFinished
    Integer iChannel
    Boolean iSsh1Finished
    Boolean iSsh2Finished
    Boolean iSsh3Finished
    String sTemp1

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    // Executing a command on multiple servers simultaneously is straightforward.
    // It's just a matter of using one SSH object per server..
    Get Create (RefClass(cComChilkatSsh)) To hoSsh1
    If (Not(IsComObjectCreated(hoSsh1))) Begin
        Send CreateComObject of hoSsh1
    End
    Get Create (RefClass(cComChilkatSsh)) To hoSsh2
    If (Not(IsComObjectCreated(hoSsh2))) Begin
        Send CreateComObject of hoSsh2
    End
    Get Create (RefClass(cComChilkatSsh)) To hoSsh3
    If (Not(IsComObjectCreated(hoSsh3))) Begin
        Send CreateComObject of hoSsh3
    End

    Move 22 To iPort
    Get ComConnect Of hoSsh1 "ssh-server1.com" iPort To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoSsh1 To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // Authenticate using login/password:
    Get ComAuthenticatePw Of hoSsh1 "sshLogin1" "sshPassword1" To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoSsh1 To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // Connect and authenticate with 2 more servers.
    // For brevity, the success/failure won't be checked...
    Get ComConnect Of hoSsh2 "ssh-server2.com" iPort To iSuccess
    Get ComAuthenticatePw Of hoSsh2 "sshLogin2" "sshPassword2" To iSuccess
    Get ComConnect Of hoSsh3 "ssh-server3.com" iPort To iSuccess
    Get ComAuthenticatePw Of hoSsh3 "sshLogin3" "sshPassword3" To iSuccess

    // Note: If we wanted, we could've used ConnectAsync and AuthenticatePwAsync
    // to do the connecting and authenticating in parallel...

    // The command to be run on each SSH server will sleep for 5 seconds,
    // and then show the current system date/time.
    Move "sleep 5; date" To sCmd

    // Start each command
    Get ComQuickCmdSend Of hoSsh1 sCmd To iSsh1Channel
    If (iSsh1Channel < 0) Begin
        Get ComLastErrorText Of hoSsh1 To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // For brevity, we're not checking the return values here:
    Get ComQuickCmdSend Of hoSsh2 sCmd To iSsh2Channel
    Get ComQuickCmdSend Of hoSsh3 sCmd To iSsh3Channel

    // OK, at this point the command is running simultaneously on each server.

    // Now collect the results of each command.
    Move 50 To iPollTimeoutMs
    Move 0 To iNumFinished

    // Note: You would rewrite this code to use arrays.
    Move False To iSsh1Finished
    Move False To iSsh2Finished
    Move False To iSsh3Finished
    While (iNumFinished < 3)
        // Check to see if anything has finished.
        // QuickCmdCheck returns -1 if there are no errors and nothing else finished
        // QuickCmdCheck returns -2 if there was an error (such as a lost connection)
        // QuickCmdCheck returns a channel number if a channel finished.
        If (iSsh1Finished <> True) Begin
            Get ComQuickCmdCheck Of hoSsh1 iPollTimeoutMs To iChannel
            If (iChannel = -2) Begin
                Get ComLastErrorText Of hoSsh1 To sTemp1
                Showln sTemp1
                Procedure_Return
            End

            If (iChannel = iSsh1Channel) Begin
                Showln "---- ssh1 channel " iChannel " finished ----"
                Get ComGetReceivedText Of hoSsh1 iChannel "ansi" To sTemp1
                Showln sTemp1
                Move (iNumFinished + 1) To iNumFinished
                Move True To iSsh1Finished
            End

        End

        If (iSsh2Finished <> True) Begin
            Get ComQuickCmdCheck Of hoSsh2 iPollTimeoutMs To iChannel
            If (iChannel = -2) Begin
                Get ComLastErrorText Of hoSsh2 To sTemp1
                Showln sTemp1
                Procedure_Return
            End

            If (iChannel = iSsh2Channel) Begin
                Showln "---- ssh2 channel " iChannel " finished ----"
                Get ComGetReceivedText Of hoSsh2 iChannel "ansi" To sTemp1
                Showln sTemp1
                Move (iNumFinished + 1) To iNumFinished
                Move True To iSsh2Finished
            End

        End

        If (iSsh3Finished <> True) Begin
            Get ComQuickCmdCheck Of hoSsh3 iPollTimeoutMs To iChannel
            If (iChannel = -2) Begin
                Get ComLastErrorText Of hoSsh3 To sTemp1
                Showln sTemp1
                Procedure_Return
            End

            If (iChannel = iSsh3Channel) Begin
                Showln "---- ssh3 channel " iChannel " finished ----"
                Get ComGetReceivedText Of hoSsh3 iChannel "ansi" To sTemp1
                Showln sTemp1
                Move (iNumFinished + 1) To iNumFinished
                Move True To iSsh3Finished
            End

        End

    Loop

    // --------------
    // Sample output:

    // 	---- ssh2 channel 101 finished ----
    // 	Fri Dec 23 00:25:48 UTC 2016
    // 
    // 	---- ssh3 channel 102 finished ----
    // 	Thu Dec 22 18:25:12 CST 2016
    // 
    // 	---- ssh1 channel 100 finished ----
    // 	Thu Dec 22 18:25:48 CST 2016


End_Procedure