# Setting a custom certificate

Tonic Structural provides a certificate for https traffic, but can also use a user-provided certificate. The certificate must:

* Use the the PFX format.
* Be named `tonic.pfx`.

To use your own certificate, you must:

* Add the `TONIC_PFX_PASSWORD` environment setting.
* Use a volume mount to provide the certificate file. Structural uses volume mounting to give the Structural containers access to the certificate.

You must apply the changes to both the Structural web server and Structural worker containers.

## Docker

To use your own certificate, you make the following changes to the **docker-compose.yml** file. 

### Environment setting

You must [add the environment setting](https://docs.tonic.ai/app/environment-variables-setting#environment-variables-set-docker) `TONIC_PFX_PASSWORD`, which contains the certificate password.

### **Volume mount**

You place the certificate on the host machine, then share it to the containers as a volume.

You must map the certificate to `/certificates` on the containers.

```
volumes:
        ...
        - /my-host-path:/certificates
```

## Kubernetes

### Environment setting

You must [add the environment setting](https://docs.tonic.ai/app/environment-variables-setting#environment-variable-set-kubernetes) `TONIC_PFX_PASSWORD`, which contains the certificate password.

### **Volume mount**

You can use any volume type that is allowed within your environment. It must provide at least [`ReadOnlyMany`](https://kubernetes.io/docs/concepts/storage/persistent-volumes/#access-modes) access.

You must map the certificate to `/certificates` on the containers. Within your web server and worker deployment YAML files, the entry should be similar to the following:

```yaml
    volumeMounts:
    - name: <my-volume-name>
      mountPath: /certificates
```