Let us take a closer look at the error 502 bad gateway when trying to access ansible tower. At Bobcares our Server management support services can give you a detailed note on the error.

Error: 502 Bad Gateway Error presents when accessing Ansible Tower

The Error 502 bad gateway when trying to access ansible tower can be caused by many factors. To see if there were any problems that triggered the error, we can look at the logs shown below:

/var/log/supervisor/awx-uwsgi.log
/var/log/nginx/error.log
/var/log/supervisor/supervisord.log

Using the command listed below, we can also attempt restarting the tower service. Execute with the root user, if possible to remove the bad gateway ansible tower error.

ansible-tower-service restart

Use the command below to verify the status after resuming.

ansible-tower-service status

Make sure each and every process is active.

ansible-tower
nginx
memcache
supervisord

Make sure all processes are running and check supervisorctl status as well to remove the bad gateway ansible tower error.

supervisorctl status

502 bad gateway when trying to access ansible tower: Error logs

There are issues on the tower server /var/log/tower. The supervisors’ logs are located in /var/log/supervisor/. Errors on the Nginx web server are recorded in the httpd error log.

Ansible – HTTP Error 502: Bad Gateway when using script with XMLRPC :

issue: get 502 bad gateway error while running script via ansible.

Verify whether the service (container) we are attempting to access with RPC is running or not as this may be the root of the bad gateway issue.

eg: Consider the scenario when a container is stopped, started, and then immediately after the start, it attempts to use RPC, which would fail.

So simple fix for the bad gateway ansible tower error:

- name: Pause for 3 seconds for Odoo service to load pause:
seconds: 3

However, this is not optimal because we cannot be certain that we will require 3 seconds. It could be too slow or too long.

The wait-for method is preferable in this case because it can respond more quickly than a simple pause. Additionally, there is no need to give a specific delay time.

- name: Save userapp container status
set_fact:
userapp_ip:"{{ docker_compose_output.services.user.app_userapp_1.networks\
.app_backend.IPAddress }}"
- name: Wait for IP to be active
wait_for:
host: "{{ odoo_ip }}"
port: 8069
state: started

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Conclusion

To conclude error 502 bad gateway when trying to access ansible tower can occur due to multiple reasons but there are effective troubleshooting steps to remove the error easily. We have learned more about the error and the error logs with the support of our Server management support services.