Automation HUB fail to configure symlink nginx snippets.

Solution Verified - Updated -

Environment

  • Ansible Automation Platform 2.1

Issue

  • When installing Ansible Automation Platform Automation Hub, the installer fails with the following error.

    TASK [pulp.pulp_installer.pulp_webserver : Symlink nginx snippets] *************
failed: [tower.hostname] (item={'changed': False, 'rc': 0, 'stdout': '\r\n/usr/lib/python3.8/site-packages/pulp_container/app/webserver_snippets/nginx.conf\r\n\x1b[0m', 'stdout_lines': ['', '/usr/lib/python3.8/site-packages/pulp_container/app/webserver_snippets/nginx.conf', '\x1b[0m'], 'stderr': 'Shared connection to tower.hostname closed.\r\n', 'stderr_lines': ['Shared connection to tower.hostname closed.'], 'failed': False, 'failed_when_result': False, '__pulp_webserver_plugin': {'key': 'pulp-container', 'value': {}}, 'ansible_loop_var': '__pulp_webserver_plugin'}) => {"__pulp_webserver_snippet": {"__pulp_webserver_plugin": {"key": "pulp-container", "value": {}}, "ansible_loop_var": "__pulp_webserver_plugin", "changed": false, "failed": false, "failed_when_result": false, "rc": 0, "stderr": "Shared connection to tower.hostname closed.\r\n", "stderr_lines": ["Shared connection to tower.hostname closed."], "stdout": "\r\n/usr/lib/python3.8/site-packages/pulp_container/app/webserver_snippets/nginx.conf\r\n\u001b[0m", "stdout_lines": ["", "/usr/lib/python3.8/site-packages/pulp_container/app/webserver_snippets/nginx.conf", "\u001b[0m"]}, "ansible_loop_var": "__pulp_webserver_snippet", "changed": false, "gid": 0, "group": "root", "mode": "0777", "msg": "Error while replacing: [Errno 2] No such file or directory: b'' -> b'/etc/nginx/pulp/.456598.1641839344.5096357.tmp'", "owner": "root", "path": "/etc/nginx/pulp/pulp_container.conf", "secontext": "unconfined_u:object_r:httpd_config_t:s0", "size": 81, "state": "link", "uid": 0}
failed: [tower.hostname] (item={'changed': False, 'rc': 0, 'stdout': '\r\n/usr/lib/python3.8/site-packages/pulp_ansible/app/webserver_snippets/nginx.conf\r\n\x1b[0m', 'stdout_lines': ['', '/usr/lib/python3.8/site-packages/pulp_ansible/app/webserver_snippets/nginx.conf', '\x1b[0m'], 'stderr': 'Shared connection to tower.hostname closed.\r\n', 'stderr_lines': ['Shared connection to tower.hostname closed.'], 'failed': False, 'failed_when_result': False, '__pulp_webserver_plugin': {'key': 'pulp-ansible', 'value': {}}, 'ansible_loop_var': '__pulp_webserver_plugin'}) => {"__pulp_webserver_snippet": {"__pulp_webserver_plugin": {"key": "pulp-ansible", "value": {}}, "ansible_loop_var": "__pulp_webserver_plugin", "changed": false, "failed": false, "failed_when_result": false, "rc": 0, "stderr": "Shared connection to tower.hostname closed.\r\n", "stderr_lines": ["Shared connection to tower.hostname closed."], "stdout": "\r\n/usr/lib/python3.8/site-packages/pulp_ansible/app/webserver_snippets/nginx.conf\r\n\u001b[0m", "stdout_lines": ["", "/usr/lib/python3.8/site-packages/pulp_ansible/app/webserver_snippets/nginx.conf", "\u001b[0m"]}, "ansible_loop_var": "__pulp_webserver_snippet", "changed": false, "msg": "Error while linking: [Errno 2] No such file or directory: b'' -> b'/etc/nginx/pulp/pulp_ansible.conf'", "path": "/etc/nginx/pulp/pulp_ansible.conf"}
failed: [tower.hostname] (item={'changed': False, 'rc': 0, 'stdout': '\r\n/usr/lib/python3.8/site-packages/galaxy_ng/app/webserver_snippets/nginx.conf\r\n\x1b[0m', 'stdout_lines': ['', '/usr/lib/python3.8/site-packages/galaxy_ng/app/webserver_snippets/nginx.conf', '\x1b[0m'], 'stderr': 'Shared connection to tower.hostname closed.\r\n', 'stderr_lines': ['Shared connection to tower.hostname closed.'], 'failed': False, 'failed_when_result': False, '__pulp_webserver_plugin': {'key': 'galaxy-ng', 'value': {'collectstatic': False, 'version': '4.4.0'}}, 'ansible_loop_var': '__pulp_webserver_plugin'}) => {"__pulp_webserver_snippet": {"__pulp_webserver_plugin": {"key": "galaxy-ng", "value": {"collectstatic": false, "version": "4.4.0"}}, "ansible_loop_var": "__pulp_webserver_plugin", "changed": false, "failed": false, "failed_when_result": false, "rc": 0, "stderr": "Shared connection to tower.hostname closed.\r\n", "stderr_lines": ["Shared connection to tower.hostname closed."], "stdout": "\r\n/usr/lib/python3.8/site-packages/galaxy_ng/app/webserver_snippets/nginx.conf\r\n\u001b[0m", "stdout_lines": ["", "/usr/lib/python3.8/site-packages/galaxy_ng/app/webserver_snippets/nginx.conf", "\u001b[0m"]}, "ansible_loop_var": "__pulp_webserver_snippet", "changed": false, "gid": 0, "group": "root", "mode": "0777", "msg": "Error while replacing: [Errno 2] No such file or directory: b'' -> b'/etc/nginx/pulp/.457026.1641839345.6191723.tmp'", "owner": "root", "path": "/etc/nginx/pulp/galaxy_ng.conf", "secontext": "unconfined_u:object_r:httpd_config_t:s0", "size": 76, "state": "link", "uid": 0}

Resolution

  • To work around this issue, let us apply the following change to the file <$INSTALER_DIR>/collections/ansible_collections/pulp/pulp_installer/roles/pulp_webserver/tasks/nginx.yml at the task Symlink nginx snippets.

    49     - name: Symlink nginx snippets
50       file:
- 51         src: "{{ __pulp_webserver_snippet.stdout_lines | first }}" <====== Remove this line
+ 51         src: "{{ __pulp_webserver_snippet.stdout_lines | reject('match', '^$')| first }}" <====== Include this line
52         dest: "/etc/nginx/pulp/{{ __pulp_webserver_snippet.__pulp_webserver_plugin.key | regex_replace('-', '_') }}.conf"
53         state: link
54       loop: '{{ snippets.results }}'
55       loop_control:
56         loop_var: __pulp_webserver_snippet
57       when: __pulp_webserver_snippet.rc == 0
58       notify: reload nginx

Root Cause

  • The installer uses the first item from the expected array, in some cases, the array can contain an empty value as a first item that can cause this issue.

Diagnostic Steps

  • The stdout_lines array contains an empty value.

    'stdout_lines': [ '', '/usr/lib/python3.8/site-packages/pulp_container/app/webserver_snippets/nginx.conf', '\x1b[0m']

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