How to catch a failure in Ansible and continue the playbook for specific task

user_8978432 0
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I have a playbook tat contains (Among other) three specfic tasks.

- name: Execute the compilation script
    command: sh {{  working_folder  }}/compile.sh 
    args:
      chdir: "{{  working_folder  }}"
    when:  run_deploy_machine  == "true"

  - name: Execute the deployment script
    command: sh {{  working_folder  }}/deploy.sh 
    args:
      chdir: "{{  working_folder  }}"
    when:  run_deploy_machine  == "true"
 
  - name: Start the JBoss server
    shell: . /jboss start

THe problem is that if any of the first two tasks fails, I need (As part of the failure process) activate the logic of the last task (It might be as a handler). I saw that there is the block/rescue option, the problem is that if I use it- the rescue "cancel" the failure. All I need is that in case of the failure- to execute the start JBoss, but that the playbook will still fail.

Any ideas how it can be done?

ansible
2 Answers

You can still use a block/rescue and use a fail task at the end of the rescue tasks. Here is a global idea:

---
- name: Clean fail in rescue demo
  hosts: localhost
  gather_facts: false

  tasks:

    - block:

        - name: task that may fail
          command: /bin/false

        - name: other task that might fail
          command: /does/this/work

      rescue:

        - name: task to remedy fail
          command: echo remedy

        - name: cleanly fail the host anyway
          fail:
            msg: clean fail after remedy
user_94010960

You could do something like that:

  - name: Execute the compilation script
    command: sh {{  working_folder  }}/compile.sh 
    args:
      chdir: "{{  working_folder  }}"
    when:  run_deploy_machine  == "true"
    register: a
    ignore_errors: True

  - name: Execute the deployment script
    command: sh {{  working_folder  }}/deploy.sh 
    args:
      chdir: "{{  working_folder  }}"
    when:  run_deploy_machine  == "true"
    register: b
    ignore_errors: True
 
  - name: Start the JBoss server
    shell: . /jboss start
    when: a.rc != "0" or b.rc != "0"

  - name: fail if build or deploy failed
    fail:
      msg: "Build or deploy failed!"
    when: a.rc != "0" or b.rc != "0"

You register the variables a and b to contain the output of the commands. rc will contain the exit code, so if that is not 0 the command failed.
If one of those commands failed, you execute task no. 3 and then fail.
ignore_errors: True prevents the play to fail instantly if one of the first steps fail.

Documentation:
shell
error handling
fail

user_36836390
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