cron expression with asterisk character included

Question

I have this code and I am trying to run on a remote node in Rundeck with input option as 0 * * * *

#!/bin/bash
cron_expression="$1"
echo "Crontab expression: $cron_expression"

When I run this via the terminal it's working fine. Also, it works well when I execute it locally on Rundeck. But when I pass the same input and execute it on remote nodes in Rundeck, it's reading '*' as a wildcard character. The script file is on Rundeck server and reading from there. Can someone suggest how to run it on Rundeck remote nodes?

Answer 1

You need to use an option in your Rundeck job to pass it to your script (use the @option.myoption@ format in inline-scripts steps or $RD_OPTION_MYOPTION format on "external scripts" steps). In that way, you can pass any value to your script. I left a job definition example tested on local and remote SSH nodes, this example uses your script as inline-script step. Take a look:

- defaultTab: nodes
  description: ''
  executionEnabled: true
  id: 11dec4c7-4514-42e3-baef-d777ba1294de
  loglevel: INFO
  name: TestCronString
  nodeFilterEditable: false
  nodefilters:
    dispatch:
      excludePrecedence: true
      keepgoing: false
      rankOrder: ascending
      successOnEmptyNodeFilter: false
      threadcount: '1'
    filter: .*
  nodesSelectedByDefault: true
  options:
  - name: expression
    value: 0 * * * *
  plugins:
    ExecutionLifecycle: null
  scheduleEnabled: true
  sequence:
    commands:
    - fileExtension: .sh
      interpreterArgsQuoted: false
      script: |
        #!/bin/bash
        cron_expression="@option.expression@"
        echo "Crontab expression: $cron_expression"
      scriptInterpreter: /bin/bash
    keepgoing: false
    strategy: node-first
  uuid: 11dec4c7-4514-42e3-baef-d777ba1294de

Check the result here.