Ops Daily: December 2016

Thursday 22 December 2016

Rundeck Parametric Job Definition

I have a use case where I need to run same set of shell instructions multiple times with different users and compare the results on remote hosts.

Thought about automating this using Rundeck, and since I am not allowed to use ssh keys password-less authentication in this case, Rundeck would be ideal.

below is a sample job listing (XML) for a parametric job that accepts username and a password and just prints the username in a simple embedded shell script.

<joblist>
<job>
    <context>
      <options preserveOrder='true'>
        <option name='Password' required='true' secure='true' valueExposed='true' />
        <option name='User_Name' required='true' value='App_User' />
      </options>
    </context>
    <description></description>
    <executionEnabled>true</executionEnabled>
    <id>5e63d0fa-9bae-4d1d-bc09-a2d8429f8b19</id>
    <loglevel>INFO</loglevel>
    <name>Parametrized_job1</name>
    <scheduleEnabled>true</scheduleEnabled>
    <sequence keepgoing='false' strategy='node-first'>
      <command>
        <script><![CDATA[echo "This is a test Job"
echo 'using form $RD_OPTION_USER_NAME' $RD_OPTION_USER_NAME
echo 'using form ${option.User_name}' ${option.User_Name} #doesn't work :)
echo 'using form \@option.User_name\@' @option.User_Name@
]]></script>
        <scriptargs />
      </command>
    </sequence>
    <uuid>5e63d0fa-9bae-4d1d-bc09-a2d8429f8b19</uuid>
</job>
</joblist>

The job parameters are better accessed as passed by Rundeck env. as:$RD_OPTION_paramname

The above job option env. variable will be passed to all rundeck executed scripts so it is much easier to use it in this form than the one between @ signs.
The form ${option.User_Name} is not working in this case as Rundeck will use it as a command-line argument if we are running a commad step rather than an embedded script.

below is an example job definition:

<joblist>
<job>
    <context>
      <options preserveOrder='true'>
        <option name='Password' required='true' secure='true' valueExposed='true' />
        <option name='User_Name' required='true' value='App_User' />
      </options>
    </context>
    <description></description>
    <executionEnabled>true</executionEnabled>
    <id>5d1db9a0-d381-49ec-8981-c483b375751c</id>
    <loglevel>INFO</loglevel>
    <name>Parametrized_job2</name>
    <scheduleEnabled>true</scheduleEnabled>
    <sequence keepgoing='false' strategy='node-first'>
      <command>
        <exec>echo ${option.User_Name}</exec>
      </command>
    </sequence>
    <uuid>5d1db9a0-d381-49ec-8981-c483b375751c</uuid>
</job>
</joblist>

Rundeck parametric jobs will prove very useful for doing generic tasks and generic automation.

Please check more info in Rundeck documentation at: http://rundeck.org/1.6.2/manual/job-options.html#prompting-the-user

Monday 5 December 2016

JQuery Draggable and Droppable demo

I was exploring a way to use simple HTML UI components to offer UI drag and drop functionality.
This is a long term plan I was having to start real automation of my day to day work and avoid executing or editing shell scripts or puppet manifests.

JQuery offers a good simple API to allow drag and drop fuctionaltity with a lot of flexiability.

Since I am not UX-UI designer, it took me quite sometime to understand how it works and write down a working demo code for the functionality.

Below is a simple code for simple HTML table (TD elements) having draggable numbers from 1 to 8 and are only droppable inside the HTML table.

<html>

<head>
<style>
table, th, td {
    border: 5px solid black;
    text-align: center;
    color: blue;
    font-size: 300%;
    font-weight: bold;
    border-spacing: 10px;
}

</style>

<script src="https://code.jquery.com/jquery-1.12.4.js"></script>
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>

<script>

// Make the element with id "draggable" draggable
$(function () {

    count = 0;

    $("#td1").draggable({revert: "invalid", containment: "document", grid: [220,210] });
    $("#td2").draggable({revert: "invalid", containment: "document", grid: [220,210] });
    $("#td3").draggable({revert: "invalid", containment: "document", grid: [220,210]});
    $("#td4").draggable({revert: "invalid", containment: "document", grid: [220,210]});
    $("#td5").draggable({revert: "invalid", containment: "document", grid: [220,210]});
    $("#td6").draggable({revert: "invalid", containment: "document", grid: [220,210]});
    $("#td7").draggable({revert: "invalid", containment: "document", grid: [220,210]});
    $("#td8").draggable({revert: "invalid", containment: "document", grid: [220,210]});

    $( "#tb1" ).droppable({
      drop: function(event, ui) {
    Edit_dragable ( ui.draggable );
    //$("#logger").html( "Dropped! ");
    //$("#logger2").html( "Testing" );
    }
    });


        function Edit_dragable( $item ) {
        $item
          .css( "color", "Yellow" );
        var textval = 'The number is ' + $item.html() + ' & the td id was: ' + $item.attr('id');
        $("#logger2").html( textval );
      }

});
</script>

</head>

<table id="tb1" >
<caption>Test arrange game </caption>
<tr id="tr1">
    <td id="td1" style="width:200; height:200; border-color: green"> 1 </td>
    <td id="td2" style="width:200; height:200;"> 2 </td>
    <td id="td3" style="width:200; height:200;"> 3 </td>
</tr>

<tr id="tr2">
    <td id="td4" style="width:200; height:200"> 4 </td>
    <td id="td5" style="width:200; height:200;"> 5 </td>
    <td id="td6" style="width:200; height:200;"> 6 </td>
</tr>

<tr id="tr3">
    <td id="td7" style="width:200; height:200;"> 7 </td>
    <td id="td8" style="width:200; height:200;"> 8 </td>

    
</tr>
</table>

<p id="logger"> </p>
<p id="logger2"> </p>

The code involves some HTML, CSS styles and JQuery to be able to achieve the functionality.

Next steps is to combine this with my other code components to offer an interactive control dash board for automating my day to day tasks.
Will continue to post as I progress in this work.