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130 lines
7.6 KiB
Markdown
130 lines
7.6 KiB
Markdown
<!--
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SPDX-FileCopyrightText: 2018 - 2024 Slavi Pantaleev
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SPDX-FileCopyrightText: 2020 - 2024 MDAD project contributors
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SPDX-FileCopyrightText: 2020 Aaron Raimist
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SPDX-FileCopyrightText: 2022 Alejo Diaz
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SPDX-FileCopyrightText: 2022 Julian Foad
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SPDX-FileCopyrightText: 2024 - 2025 Suguru Hirahara
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SPDX-License-Identifier: AGPL-3.0-or-later
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-->
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# Adjusting SSL certificate retrieval (optional, advanced)
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By default, the playbook retrieves and automatically renews free SSL certificates from [Let's Encrypt](https://letsencrypt.org/) via [ACME](https://en.wikipedia.org/wiki/Automatic_Certificate_Management_Environment) for the domains of the services it installs (e.g. `matrix.example.com` and others). Refer this guide if you want to modify settings about how it manages SSL certificates or have the Traefik server use yours.
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**Notes**:
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- This guide is intended to be referred for configuring the integrated Traefik server with regard to SSL certificates retrieval. If you're using [your own webserver](configuring-playbook-own-webserver.md), consult its documentation about how to configure it.
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- Let's Encrypt ends the expiration notification email service on June 4, 2025 (see: [the official announcement](https://letsencrypt.org/2025/01/22/ending-expiration-emails/)), and it recommends using a third party service for those who want to receive expiriation notifications. If you are looking for a self-hosting service, you may be interested in a monitoring tool such as [Update Kuma](https://github.com/louislam/uptime-kuma/).
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The [Mother-of-All-Self-Hosting (MASH)](https://github.com/mother-of-all-self-hosting/mash-playbook) Ansible playbook can be used to install and manage an Uptime Kuma instance. See [this page](https://github.com/mother-of-all-self-hosting/mash-playbook/blob/main/docs/services/uptime-kuma.md) for the instruction to install it with the MASH playbook. If you are wondering how to use the MASH playbook for your Matrix server, refer [this page](https://github.com/mother-of-all-self-hosting/mash-playbook/blob/main/docs/setting-up-services-on-mdad-server.md).
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## Use staging Let's Encrypt certificates
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For testing purposes, you may wish to use staging certificates provided by Let's Encrypt to avoid hitting [its rate limits](https://letsencrypt.org/docs/rate-limits/).
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To use ones, add the following configuration to your `inventory/host_vars/matrix.example.com/vars.yml` file:
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```yaml
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traefik_config_certificatesResolvers_acme_use_staging: true
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```
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## Disable SSL termination
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For testing or other purposes, you may wish to install services without SSL termination and have services exposed to `http://` instead of `https://`.
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To do so, add the following configuration to your `vars.yml` file:
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```yaml
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traefik_config_entrypoint_web_secure_enabled: false
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```
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## Use self-signed SSL certificates
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To use self-signed certificates, generate them and follow the documentation below about using your own certificates.
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## Use your own SSL certificates
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To use your own certificates, prepare them and follow the steps below:
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- Disable [ACME](https://en.wikipedia.org/wiki/Automatic_Certificate_Management_Environment) / [Let's Encrypt](https://letsencrypt.org/) support
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- Put a custom Traefik configuration file on the server, with the help of this Ansible playbook (via the [`aux` role](https://github.com/mother-of-all-self-hosting/ansible-role-aux)) or manually
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- Register your custom configuration file with Traefik, by adding an extra provider of type [file](https://doc.traefik.io/traefik/providers/file/)
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- Put the SSL files on the server, with the help of this Ansible playbook (via the [`aux` role](https://github.com/mother-of-all-self-hosting/ansible-role-aux)) or manually
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For those steps, you can add the following configuration to your `vars.yml` file (adapt to your needs). If you will put the custom configuration files manually, make sure to remove the `aux_file_definitions` variable.
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```yaml
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# Disable ACME / Let's Encrypt support.
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traefik_config_certificatesResolvers_acme_enabled: false
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# Disabling ACME support (above) automatically disables the SSL directory to be created.
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# Force-enable it to be created with this configuration, because we'll add our certificate files there.
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traefik_ssl_dir_enabled: true
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# Tell Traefik to load our custom SSL key pair by extending provider configuration.
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# The key pair files are created below, in `aux_file_definitions`.
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# Note that the `/ssl/…` path is an **in-container path**, not a path on the host (like `/matrix/traefik/ssl`). Do not change it!
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traefik_provider_configuration_extension_yaml:
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tls:
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certificates:
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- certFile: /ssl/cert.pem
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keyFile: /ssl/privkey.pem
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stores:
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default:
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defaultCertificate:
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certFile: /ssl/cert.pem
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keyFile: /ssl/privkey.pem
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# Use the aux role to create our custom files on the server.
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# If you'd like to do this manually, remove this `aux_file_definitions` variable.
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aux_file_definitions:
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# Create the privkey.pem file on the server by
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# uploading a file from the computer where Ansible is running.
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- dest: "{{ traefik_ssl_dir_path }}/privkey.pem"
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src: /path/on/your/Ansible/computer/to/privkey.pem
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# Alternatively, comment out `src` above and uncomment the lines below to provide the certificate content inline.
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# Mind the indentation level (indented with two white space characters).
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# content: |
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# FILE CONTENT
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# HERE
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# Create the cert.pem file on the server
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# uploading a file from the computer where Ansible is running.
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- dest: "{{ traefik_ssl_dir_path }}/cert.pem"
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src: /path/on/your/Ansible/computer/to/cert.pem
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# Alternatively, comment out `src` above and uncomment the lines below to provide the certificate content inline.
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# Mind the indentation level (indented with two white space characters).
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# content: |
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# FILE CONTENT
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# HERE
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```
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## Use a DNS-01 ACME challenge type, instead of HTTP-01
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You can configure Traefik to use the [DNS-01 challenge type](https://letsencrypt.org/docs/challenge-types/#dns-01-challenge) for Let's Encrypt. This is less commonly used than the default [HTTP-01 challenge type](https://letsencrypt.org/docs/challenge-types/#http-01-challenge), but can be helpful to:
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- hide your public IP from Let's Encrypt logs
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- allow you to obtain SSL certificates for servers which are not accessible (via HTTP) from the public internet (and for which the HTTP-01 challenge would fail)
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### Example: Cloudflare
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Here is an example for configurations on the `vars.yml` file for Cloudflare. Please adjust it as necessary before applying it.
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```yaml
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traefik_config_certificatesResolvers_acme_dnsChallenge_enabled: true
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traefik_config_certificatesResolvers_acme_dnsChallenge_provider: "cloudflare"
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traefik_config_certificatesResolvers_acme_dnsChallenge_delayBeforeCheck: 60
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traefik_config_certificatesResolvers_acme_dnsChallenge_resolvers:
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- "1.1.1.1:53"
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traefik_environment_variables_additional_variables: |
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CF_API_EMAIL=redacted
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CF_ZONE_API_TOKEN=redacted
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CF_DNS_API_TOKEN=redacted
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LEGO_DISABLE_CNAME_SUPPORT=true
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```
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Make sure to change the value of "provider" to your particular DNS solution, and provide the appropriate environment variables. The full list of supported providers is available [here](https://doc.traefik.io/traefik/https/acme/#providers).
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This example assumes you're using Cloudflare to manage your DNS zone. Note that it requires the use of two tokens: one for reading all zones (`CF_ZONE_API_TOKEN`) and another that must be able to edit the particular domain you're using (`CF_DNS_API_TOKEN`). For security, it's recommended that you create two fine-grained tokens for this purpose, but you might choose to use the same token for both.
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