vRealize Blog

The following script removes a virtual machine from Chef during decommissioning using Knife via SSH

var strChef10;
	strChef10 = "chef-v10.vcoflow.co.uk";

var strChef11;
	strChef11 = "chef-v11.vcoflow.co.uk"

try
{
 var objSSHSession;
 objSSHSession = new SSHSession( strChef10, "vcoflow" );
 objSSHSession.connectWithIdentity( "../server/vmo/conf/vco_key", "" );

 for ( var i = 0; i < arrHostNames.length; i++ )
 {
 var strHostName;
 strHostName = arrHostNames[i];

 objSSHSession.executeCommand( "knife node delete " + strHostName.toLowerCase() + ".vcoflow.co.uk -y -c /home/vcoflow/client.rb -u vcoflow -k /home/vcoflow/client.pem", true );

System.log("===== SSH Executing: knife node delete '" + strHostName.toLowerCase() + ".vcoflow.co.uk'");

 var strOutputText;
 strOutputText = objSSHSession.getOutput();
 strOutputText = strOutputText.replace(/\n/, "");

 var strErrorText;
 strErrorText = objSSHSession.getError();

 var intExitCode;
 intExitCode = objSSHSession.exitCode;

 if ( intExitCode == 0 )
 {
 System.log("===== SSH Output: " + strOutputText);
 }
 else
 {
 if(strErrorText.search(/404 \"Not Found\"/) > -1)
 {
 System.warn("===== SSH Error: Node " + strHostName.toLowerCase() + ".vcoflow.co.uk not found on Chef Server");
 }
 else
 {
 System.error(strErrorText);
 }
 }

 objSSHSession.executeCommand( "knife client delete " + strHostName.toLowerCase() + ".vcoflow.co.uk-y -c /home/vcoflow/client.rb -u vcoflow -k /home/vcoflow/client.pem", true );

System.log("===== SSH Executing: knife client delete '" + strHostName.toLowerCase() + ".vcoflow.co.uk'");

var strOutputText;
 strOutputText = objSSHSession.getOutput();

 var strErrorText;
 strErrorText = objSSHSession.getError();

 var intExitCode;
 intExitCode = objSSHSession.exitCode;

 if ( intExitCode == 0 )
 {
 System.log("===== SSH Output: " + strOutputText);
 }
 else
 {
 if(strErrorText.search(/404 \"Not Found\"/) > -1)
 {
 System.warn("===== SSH Error: Client " + strHostName.toLowerCase() + ".vcoflow.co.uk not found on Chef Server");
 }
 else
 {
 System.error(strErrorText);
 }
 }
 }

 objSSHSession.disconnect();
 objSSHSession = null;
}
catch (strException)
{
 System.error("===== Exception: " + strException);
 System.error("===== Unable to SSH to " + strChef9 + " to run the 'knife' commands to clean up Chef");
}