Elastic Beanstalk deployment fails when attempting to mount nginx config

Question

When deploying to Elastic Beanstalk Docker, I'm getting the following error in the eb_engine log group. I'm running on AWS Linux 2023 and have tried creating a `/.platform/nginx/nginx.conf` file on the machine I'm running `eb deploy` from.

```
Error response from daemon: failed to create task for container: failed to create shim task: OCI runtime create failed: runc create failed: unable to start container process: error during container init: error mounting "/var/app/current/nginx.conf" to rootfs at "/etc/nginx/conf.d/default.conf": mount /var/app/current/nginx.conf:/etc/nginx/conf.d/default.conf (via /proc/self/fd/6), flags: 0x5000: not a directory: unknown: Are you trying to mount a directory onto a file (or vice-versa)? Check if the specified host path exists and is the expected type
```

Where should `/var/app/current/nginx.conf` be coming from? I also SSHed into the EC2 instance and found there is no `/etc/nginx/conf.d/default.conf` file (but the directory exists). Since the error indicates "Check if the specified host path exists", I'm guessing it's to do with the `nginx.conf` file missing from Elastic Beanstalk engine process, but am not sure how I might include it other than adding it to the `.platform
ginx`.

Kidd Ip · Answer

Considering below steps to address and fix the issue:

* Correct Directory Structure: Ensure that your .platform/nginx/conf.d/ directory structure is correct. The configuration file should be placed in .platform/nginx/conf.d/elasticbeanstalk/.

* File Permissions: Verify that the file permissions are set correctly. The Nginx configuration file should be readable by the Nginx process.
 
* Container Commands: Add a container command to reload Nginx after configuration changes. Create a file named 00_myconf.config in the .platform/ directory with the following content:

```
container_commands:
  01_reload_nginx:
    command: "nginx -s reload"
```
* Bundle Structure: Ensure that your application bundle includes the .platform/ directory and all necessary configuration files. When you zip your project for deployment, make sure the .platform/ folder is included.

* Environment Rebuild: Sometimes, a rebuild of the environment is necessary to apply the changes. You can trigger a rebuild from the Elastic Beanstalk console.

* Check Logs: Review the eb-engine.log for any additional error messages that might provide more insight into the issue.

Elastic Beanstalk deployment fails when attempting to mount nginx config

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