# System configuration

This section describes configuration of ReCodEx components. Bold items in lists
describing the values are mandatory, italic ones are optional.

## Monitor

Configuration file is located in directory `/etc/recodex/monitor/` by default.
It is in YAML format as all of the other configurations.

### Configuration items

Description of configurable items, bold ones are required, italics ones are
optional.

- _websocket_uri_ -- URI where is the endpoint of WebSocket connection. Must be
  visible to the clients (directly or through public proxy)
	- string representation of IP address or a hostname
	- port number
- _zeromq_uri_ -- URI where is the endpoint of ZeroMQ connection from broker.
  Could be hidden from public internet.
	- string representation of IP address or a hostname
	- port number
- _logger_ -- settings of logging
	- _file_ -- path with name of log file. Defaults to
	  `/var/log/recodex/monitor.log`
	- _level_ -- logging level, one of "debug", "info", "warning", "error" and
	  "critical"
	- _max-size_ -- maximum size of log file before rotation in bytes
	- _rotations_ -- number of rotations kept

### Example configuration file

```{.yml}
---
websocket_uri:
    - "127.0.0.1"
    - 4567
zeromq_uri:
    - "127.0.0.1"
    - 7894
logger:
    file: "/var/log/recodex/monitor.log"
    level: "debug"
    max-size: 1048576  # 1 MB
    rotations: 3
...
```

## REST API

The API can be configured in `config.neon` and `config.local.neon` files in
`app/config` directory of the API project source tree. The first file is
predefined by authors and should not be modified. The second one is not present
and could be created by copying `config.local.neon.example` template in the
config directory. Local configuration have higher precedence, so it will
override default values from `config.neon`.

### Configurable items

Description of configurable items. All timeouts are in milliseconds if not
stated otherwise.

- accessManager -- configuration of access token in [JWT
  standard](https://www.rfc-editor.org/rfc/rfc7519.txt). Do **not** modify
  unless you really know what are you doing.
- fileServer -- connection to fileserver
	- address -- URI of fileserver
	- auth -- _username_ and _password_ for HTTP basic authentication
	- timeouts -- _connection_ timeout for establishing new connection and
	  _request_ timeout for completing one request
- broker -- connection to broker
	- address -- URI of broker
	- auth -- _username_ and _password_ for broker callback authentication back
	  to API
	- timeouts -- _ack_ timeout for first response that broker receives the
	  message, _send_ timeout how long try to send new job to the broker and
	  _result_ timeout how long to wait for confirmation if job can be processed
	  or not
- monitor -- connection to monitor
	- address -- URI of monitor
- CAS -- CAS external authentication
	- serviceId -- visible identifier of this service
	- ldapConnection -- parameters for connecting to LDAP, _hostname_,
	  _base_dn_, _port_, _security_ and _bindName_
	- fields -- names of LDAP keys for informations as _email_, _firstName_ and
	  _lastName_
- emails -- common configuration for sending email (addresses and template
  variables)
	- apiUrl -- base URL of API server including port (for referencing pictures
	  in messages)
	- footerUrl -- link in the message footer
	- siteName -- name of frontend (ReCodEx, or KSP for unique instance for KSP
	  course)
	- githubUrl -- URL to GitHub repository of this project
	- from -- sending email address
- failures -- admin messages on errors
	- emails -- additional info for sending mails, _to_ is admin mail address,
	  _from_ is source address, _subjectPrefix_ is prefix of mail subject
- forgottenPassword -- user messages for changing passwords
	- redirectUrl -- URL of web application where the password can be changed
	- tokenExpiration -- expiration timeout of temporary token (in seconds)
	- emails -- additional info for sending mails, _from_ is source address and
	  _subjectPrefix_ is prefix of mail subject
- mail -- configuration of sending mails
	- smtp -- using SMTP server, have to be "true"
	- host -- address of the server
	- port -- sending port (common values are 25, 465, 587)
	- username -- login to the server
	- password -- password to the server
	- secure -- security, values are empty for no security, "ssl" or "tls"
	- context -- additional parameters, depending on used mail engine. For
	  examle self-signed certificates can be allowed as _verify_peer_ and
	  _verify_peer_name_ to false and _allow_self_signed_ to true under _ssl_
	  key (see example).

Outside the parameters section of configuration is configuration for Doctrine.
It is ORM framework which maps PHP objects (entities) into database tables and
rows. The configuration is simple, required items are only _user_, _password_
and _host_ with _dbname_, i.e. address of database computer (mostly localhost)
with name of ReCodEx database.

### Example local configuration file

```{.yml}
parameters:
  accessManager:
    leeway: 60
    issuer: https://recodex.projekty.ms.mff.cuni.cz
    audience: https://recodex.projekty.ms.mff.cuni.cz
    expiration: 86400  # 24 hours in seconds
    usedAlgorithm: HS256
    allowedAlgorithms:
      - HS256
    verificationKey: "recodex-123"
  fileServer:
    address: http://127.0.0.1:9999
    auth:
      username: "user"
      password: "pass"
    timeouts:
      connection: 500
  broker:
    address: tcp://127.0.0.1:9658
    auth:
      username: "user"
      password: "pass"
    timeouts:
      ack: 100
      send: 5000
      result: 1000
  monitor:
    address: wss://recodex.projekty.ms.mff.cuni.cz:4443/ws
  CAS:
    serviceId: "cas-uk"
    ldapConnection:
      hostname: "ldap.cuni.cz"
      base_dn: "ou=people,dc=cuni,dc=cz"
      port: 389
      security: SSL
      bindName: "cunipersonalid"
    fields:
      email: "mail"
      firstName: "givenName"
      lastName: "sn"
  emails:
    apiUrl: https://recodex.projekty.ms.mff.cuni.cz:4000
    footerUrl: https://recodex.projekty.ms.mff.cuni.cz
    siteName: "ReCodEx"
    githubUrl: https://github.com/ReCodEx
    from: "ReCodEx <noreply@example.com>"
  failures:
    emails:
      to: "Admin Name <admin@example.com>"
      from: %emails.from%
      subjectPrefix: "ReCodEx Failure Report - "
  forgottenPassword:
    redirectUrl: "https://recodex.projekty.ms.mff.cuni.cz/
                  forgotten-password/change"
    tokenExpiration: 600 # 10 minues
    emails:
      from: %emails.from%
      subjectPrefix: "ReCodEx Forgotten Password Request - "
  mail:
    smtp: true
    host: "smtp.ps.stdin.cz"
    port: 587
    username: "user"
    password: "pass"
    secure: "tls"
    context:
      ssl:
        verify_peer: false
        verify_peer_name: false
        allow_self_signed: true
doctrine:
  user: "user"
  password: "pass"
  host: localhost
  dbname: "recodex-api"
```


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