website/docs: add architecture and persistence (#6250)
* website/docs: add architecture and persistence Signed-off-by: Jens Langhammer <jens@goauthentik.io> * Apply suggestions from code review Co-authored-by: Tana M Berry <tanamarieberry@yahoo.com> Signed-off-by: Jens L. <jens@beryju.org> * Apply suggestions from code review Co-authored-by: Tana M Berry <tanamarieberry@yahoo.com> Signed-off-by: Jens L. <jens@beryju.org> * add note about kubernetes Signed-off-by: Jens Langhammer <jens@goauthentik.io> * link to relevant parts Signed-off-by: Jens Langhammer <jens@goauthentik.io> --------- Signed-off-by: Jens Langhammer <jens@goauthentik.io> Signed-off-by: Jens L. <jens@beryju.org> Co-authored-by: Tana M Berry <tanamarieberry@yahoo.com>
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---
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title: Architecture
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---
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authentik consists of a handful of components, most of which are required for a functioning setup.
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```mermaid
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graph LR
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user(User) --> ak_server(authentik Server)
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ak_server --> ak_server_core(authentik Server Core)
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ak_server --> ak_outpost(Embedded outpost)
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ak_server_core --> db(PostgreSQL)
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ak_server_core --> cache(Redis)
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ak_worker(Background Worker) --> db(PostgreSQL)
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ak_worker(Background Worker) --> cache(Redis)
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```
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### Server
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The server container consists of two sub-components, the actual server itself and the embedded outpost. Incoming requests to the server container(s) are routed by a lightweight router to either the _Core_ server or the embedded outpost. This router also handles requests for any static assets such as JavaScript and CSS files.
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#### Core
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The core sub-component handles most of authentik's logic, such as API requests, flow executions, any kind of SSO requests, etc.
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#### Embedded outpost
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Similar to [other outposts](../outposts/index.mdx), this outposts allows using [Proxy providers](../providers/proxy/index.md) without deploying a separate outpost.
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#### Persistence
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- `/media` is used to store icons and such, but not required, and if not mounted, authentik will allow you to set a URL to icons in place of a file upload
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### Background Worker
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This container executes background tasks, such as sending emails, the event notification system, and everything you can see on the _System Tasks_ page in the frontend.
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#### Persistence
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- `/certs` is used for authentik to import external certs, which in most cases shouldn't be used for SAML, but rather if you use authentik without a reverse proxy, this can be used for example for the [Let's Encrypt integration](../core/certificates.md#lets-encrypt)
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- `/templates` is used for [custom email templates](../flow/stages/email/index.mdx#custom-templates), and as with the other ones fully optional
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### PostgreSQL
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authentik uses PostgreSQL to store all of its configuration and other data (excluding uploaded files).
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#### Persistence
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- `/var/lib/postgresql/data` is used to store the PostgreSQL database
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On Kubernetes, with the default Helm chart and using the packaged PostgreSQL sub-chart, persistent data is stored in a PVC.
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### Redis
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authentik uses Redis as a message-queue and a cache. Data in Redis is not required to be persistent, however you should be aware that restarting Redis will cause the loss of all sessions.
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#### Persistence
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- `/data` is used to store the Redis data
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On Kubernetes, with the default Helm chart and using the packaged Redis sub-chart, persistent data is stored in a PVC.
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@ -71,6 +71,13 @@ See [Configuration](../installation/configuration) to change the internal ports.
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## Startup
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:::warning
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The server assumes to have local timezone as UTC.
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All internals are handled in UTC; whenever a time is displayed to the user in UI, the time shown is localized.
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Do not update or mount `/etc/timezone` or `/etc/localtime` in the authentik containers.
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This will not give any advantages. It will cause problems with OAuth and SAML authentication, e.g. [see this GitHub issue](https://github.com/goauthentik/authentik/issues/3005).
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:::
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Afterwards, run these commands to finish:
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```shell
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@ -85,28 +92,3 @@ By default, authentik is reachable (by default) on port 9000 (HTTP) and port 944
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To start the initial setup, navigate to `https://<your server's IP or hostname>:9000/if/flow/initial-setup/`.
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There you are prompted to set a password for the akadmin user (the default user).
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## Explanation
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:::warning
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The server assumes to have local timezone as UTC.
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All internals are handled in UTC; whenever a time is displayed to the user in UI it gets localized.
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Do not update or mount `/etc/timezone` or `/etc/localtime` in the authentik containers.
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This will not give any advantages.
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On the contrary, it will cause problems with OAuth and SAML authentication,
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e.g. [see this GitHub issue](https://github.com/goauthentik/authentik/issues/3005).
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:::
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The Docker-Compose project contains the following containers:
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- server
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This is the backend service, which does all the logic, plus runs the API and the SSO functionality. It also runs the frontend, hosts the JS/CSS files, and serves the files you've uploaded for icons/etc.
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- worker
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This container executes background tasks, everything you can see on the _System Tasks_ page in the frontend.
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- redis (for cache)
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- postgresql (default database)
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@ -33,6 +33,7 @@ module.exports = {
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"core/tenants",
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"core/certificates",
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"core/geoip",
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"core/architecture",
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],
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},
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{
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