The suggested approach to loop a step over all build agents:

1. In advanced setting of the step, define a repeat parameter say "agent", and choose the option "addresses of all nodes matching specified criteria" for value, and specify "any build agent" for the option
2. In node selection setting of the step, choose option "on node with address equal to specified step parameter", and input parameter as "agent" (defined in step 1)

Hi Robin
it is quite what i am looking for, but it need that the script runs from the server
Four our testing the test must run from the server and get the parameters of the agent and then run a script on the agent including agent reset

In addition during our tests we will have a step that occurs more than one time (reset the board) but one the step is used we cannot used anymore in the configuration

Thanks,
Ari

Then below logic may help. It loops over all build agents at server side, and can run some groovy script on desired agent if necessary:

groovy:
for (agent in system.agentManager.buildAgents) {
  // do something on server
  def scriptRunOnAgent = "print 'hello'"
  def evalContext = ["var1", "value1"]
  agent.nodeService.evalGroovyScript(scriptRunOnAgent, evalContext);
}

Thank you, but this mean that my script to run must be written in groovy, but we want to run a python script so what should be the follow command for python if possible agent.nodeService.evalGroovyScript(scriptRunOnAgent, evalContext);

thanks,
ari

Yes you can execute any external command from groovy. For instance, below script executes "cmd.exe" and prints a "hello world":

groovy:
def evalContext = ["var1":"value1"] // put any variables here you want 
def script = '''
return "cmd /c echo hello world".execute().text
'''
def output = node.nodeService.evalGroovyScript(script, evalContext);
logger.info(output);

HI Robin,

I tried your suggestion and this is my script
groovy:
for (agent in system.agentManager.buildAgents) {
logger.info("******************************************************")

def evalContext = ["pdu_ip":"${vars.getValue("pdu_ip")}",
"pdu_port":"${vars.getValue("pdu_port")}" ,
"number_of_pf":"2" ,
"gpio_ip":"${vars.getValue("gpio_ip")}",
"gpio_port":"${vars.getValue("gpio_port")}"]

logger.info(agent.ip)
logger.info(agent.hostName)
logger.info("gpio_ip = {} ", agent.userAttributes.get("gpio_board_ip"));
logger.info("gpio_port = {} ", agent.userAttributes.get("gpio_port"));
logger.info("pdu_ip = {} ", agent.userAttributes.get("pdu_ip"));
logger.info("pdu_port = {} ", agent.userAttributes.get("pdu_port"));

//def scriptRunOnAgent = "python /home/svjer/my_tests/Scripts/automation/ssh.py ${vars.getValue("pdu_ip")} ${vars.getValue("pdu_port")} 2 ${vars.getValue("gpio_ip")} ${vars.getValue("gpio_port")}"
def scriptRunOnAgent = '''
return "python /home/svjer/my_tests/Scripts/automation/ssh.py ".execute().text
'''

def output = node.nodeService.evalGroovyScript(scriptRunOnAgent, evalContext);
logger.info(output)

}

and i get this output

18:42:17,150 INFO - Executing pre-execute action...
18:42:17,150 INFO - Running step...
18:42:17,158 INFO - Checking step execute condition...
18:42:17,158 INFO - Step execute condition not satisfied, step will be skipped.
18:42:17,177 INFO - Checking step execute condition...
18:42:17,177 INFO - Step execute condition not satisfied, step will be skipped.
18:42:17,192 INFO - Checking step execute condition...
18:42:17,193 INFO - Step execute condition satisfied, executing...
18:42:17,307 INFO - Executing pre-execute action...
18:42:17,307 INFO - Running step...
18:42:17,326 INFO - ******************************************************
18:42:17,326 INFO - 10.12.234.244
18:42:17,326 INFO - Platform2
18:42:17,326 INFO - gpio_ip = 10.12.249.49
18:42:17,326 INFO - gpio_port = 4
18:42:17,326 INFO - pdu_ip = 10.12.235.3
18:42:17,326 INFO - pdu_port = 2
18:42:17,445 INFO -
18:42:17,445 INFO - ******************************************************
18:42:17,445 INFO - 10.12.234.70
18:42:17,445 INFO - Platform3
18:42:17,445 INFO - gpio_ip = 10.12.249.49
18:42:17,445 INFO - gpio_port = 1
18:42:17,445 INFO - pdu_ip = 10.12.235.3
18:42:17,445 INFO - pdu_port = 3
18:42:17,556 INFO -
18:42:17,556 INFO - Executing post-execute action...
18:42:17,698 INFO - Executing post-execute action...

the python script is not running
what is wrong with the command

Please check agent log of "10.12.234.244" to see if there are any errors printed there.

Additionally, you may enhance your script to capture the stderr and return it so that QB logs it for error diagnostics. For details, please refer to this link:

I checked the log of the agent but nothing special, i restart the agent and no log has been added

Please modify your script below way to capture stderr in build log:

groovy:
def evalContext = ["var1":"value1"] // put any variables here you want 
def script = '''
def stdout = new StringBuilder(), stderr = new StringBuilder()
def proc = "cmd /c echo hello world".execute()
proc.consumeProcessOutput(stdout, stderr)
proc.waitFor()
return [stdout, stderr]
'''
def result = node.nodeService.evalGroovyScript(script, evalContext);
logger.info("stdout: " + result[0]);
logger.info("stderr: " + result[1]);