Wondering if anyone here can help...
I'm running Ansible 2.10.7 - The below Ansible task is responsible for checking whether or not any JBOSS deployments exist from a previous Ansible run or not.
If nothing is returned by check_deployments.stdout_lines (check_deployments.stdout_lines | length == 0) then it should deploy all of the deployments defined in the loop. However, if something is returned (check_deployments.stdout_lines | length > 0) then it should undeploy whatever exists by using the check_deployments.stdout_lines content (e.g. old_deployment1, old_deployment2, old_deployment3, old_deployment4).
I am currently running this Ansible against a fresh server with no deployments, so I would expect that the undeploy section should be skipped due to check_deployments.stdout_lines being empty. However, it tries to run, but fails with the following error:
TASK [app : Undeploy all existing deployments as the versions do not match deployments defined in group_vars] ************************************************************************
fatal: []: FAILED! => {"msg": "'dict object' has no attribute 'stdout_lines'"}
Here is the output to my debug:
"check_deployments": {
"changed": true,
"msg": "All items completed",
"results": [
{
"ansible_loop_var": "item",
"changed": true,
"cmd": "./jboss-cli.sh --connect --commands='ls deployment' | grep -q deployment1",
"delta": "0:00:02.081544",
"end": "2021-04-28 16:12:18.448965",
"failed": false,
"failed_when_result": false,
"invocation": {
"module_args": {
"_raw_params": "./jboss-cli.sh --connect --commands='ls deployment' | grep -q deployment1",
"_uses_shell": true,
"argv": null,
"chdir": "/opt/jboss/jboss-eap-7.1/bin",
"creates": null,
"executable": null,
"removes": null,
"stdin": null,
"stdin_add_newline": true,
"strip_empty_ends": true,
"warn": true
}
},
"item": "deployment1",
"msg": "non-zero return code",
"rc": 1,
"start": "2021-04-28 16:12:16.367421",
"stderr": "",
"stderr_lines": [],
"stdout": "",
"stdout_lines": []
},
{
"ansible_loop_var": "item",
"changed": true,
"cmd": "./jboss-cli.sh --connect --commands='ls deployment' | grep -q deployment2",
"delta": "0:00:02.185931",
"end": "2021-04-28 16:12:21.396740",
"failed": false,
"failed_when_result": false,
"invocation": {
"module_args": {
"_raw_params": "./jboss-cli.sh --connect --commands='ls deployment' | grep -q deployment2",
"_uses_shell": true,
"argv": null,
"chdir": "/opt/jboss/jboss-eap-7.1/bin",
"creates": null,
"executable": null,
"removes": null,
"stdin": null,
"stdin_add_newline": true,
"strip_empty_ends": true,
"warn": true
}
},
"item": "deployment2",
"msg": "non-zero return code",
"rc": 1,
"start": "2021-04-28 16:12:19.210809",
"stderr": "",
"stderr_lines": [],
"stdout": "",
"stdout_lines": []
},
{
"ansible_loop_var": "item",
"changed": true,
"cmd": "./jboss-cli.sh --connect --commands='ls deployment' | grep -q deployment3",
"delta": "0:00:01.938456",
"end": "2021-04-28 16:12:24.060703",
"failed": false,
"failed_when_result": false,
"invocation": {
"module_args": {
"_raw_params": "./jboss-cli.sh --connect --commands='ls deployment' | grep -q deployment3",
"_uses_shell": true,
"argv": null,
"chdir": "/opt/jboss/jboss-eap-7.1/bin",
"creates": null,
"executable": null,
"removes": null,
"stdin": null,
"stdin_add_newline": true,
"strip_empty_ends": true,
"warn": true
}
},
"item": "deployment3",
"msg": "non-zero return code",
"rc": 1,
"start": "2021-04-28 16:12:22.122247",
"stderr": "",
"stderr_lines": [],
"stdout": "",
"stdout_lines": []
},
{
"ansible_loop_var": "item",
"changed": true,
"cmd": "./jboss-cli.sh --connect --commands='ls deployment' | grep -q deployment4",
"delta": "0:00:01.934429",
"end": "2021-04-28 16:12:26.819414",
"failed": false,
"failed_when_result": false,
"invocation": {
"module_args": {
"_raw_params": "./jboss-cli.sh --connect --commands='ls deployment' | grep -q deployment4",
"_uses_shell": true,
"argv": null,
"chdir": "/opt/jboss/jboss-eap-7.1/bin",
"creates": null,
"executable": null,
"removes": null,
"stdin": null,
"stdin_add_newline": true,
"strip_empty_ends": true,
"warn": true
}
},
"item": "deployment4",
"msg": "non-zero return code",
"rc": 1,
"start": "2021-04-28 16:12:24.884985",
"stderr": "",
"stderr_lines": [],
"stdout": "",
"stdout_lines": []
}
]
}
}
Here is my Ansible task:
- name: Check if the deployments defined in group_vars are already installed
ansible.builtin.shell: "./jboss-cli.sh --connect --commands='ls deployment' | grep -q {{ item }}"
args:
chdir: "{{ jboss_home_dir }}/bin"
register: check_deployments
failed_when: check_deployments.rc == 2
tags: # We always need to check this as the output determines whether or not we need to undeploy an existing deployment.
- skip_ansible_lint
loop:
- "{{ new_deployment1 }}"
- "{{ new_deployment2 }}"
- "{{ new_deployment3 }}"
- "{{ new_deployment4 }}"
- name: Show list of deployments
ansible.builtin.debug:
var: check_deployments.stdout_lines
- name: Undeploy all existing deployments as the versions do not match deployments defined in group_vars
ansible.builtin.command: "./jboss-cli.sh --connect 'undeploy {{ item }} --all-relevant-server-groups'"
args:
chdir: "{{ jboss_home_dir }}/bin"
when: check_deployments.stdout_lines | length > 0
register: check_undeployment_status
loop:
- "{{ check_deployments.stdout_lines }}"
- name: Deploy all deployments defined in group_vars
ansible.builtin.command: "./jboss-cli.sh --connect 'deploy {{ jboss_deployment_dir }}/{{ item }} --server-groups=dm-server-group'"
args:
chdir: "{{ jboss_home_dir }}/bin"
when: check_deployments.stdout_lines | length == 0 or check_undeployment_status.rc | default('') == 0
loop:
- "{{ new_deployment1 }}"
- "{{ new_deployment2 }}"
- "{{ new_deployment3 }}"
- "{{ new_deployment4 }}"
Something is wrong in your playbook together with the given output. When I build a similar playbook without all the dependencies:
- name: "Check if the deployments defined in group_vars are already installed"
shell: "{{ item }}"
register: check_deployments
loop:
- "pwd"
- "ls -al"
- "pwd"
- name: "Show list of deployments"
debug:
var: check_deployments.stdout_lines
I'm getting the information
TASK [Show list of deployments] *************************************************
ok: [localhost] =>
check_deployments.stdout_lines: VARIABLE IS NOT DEFINED!
This is true, because you loop over a Ansible module and register ALL output into ONE variable. In that case, the variable contains a list of results. So - your loop with check_deployments.stdout_lines is wrong. You need to loop over all check_deployments.results which contains the correct "registered" variable per module run, which you want to check
- name: "Undeploy..."
debug:
msg: "stdout: {{ item.cmd }}"
when: "item.stdout_lines | length > 1"
loop: "{{ check_deployments.results }}"
This will only output one entry (ls -al). All other will be skipped.