Fail2ban stop working because no logs since updating to v1.24.0

[Gandulf78]

Subject of the issue

Fail2ban is not working anymore with vaultwarden since updating to v1.24.0.
It seems that VW has stopped recording in log file.

Deployment environment

Your environment (Generated via diagnostics page)

• Vaultwarden version: v1.24.0
• Web-vault version: v2.25.1
• Running within Docker: true (Base: Debian)
• Environment settings overridden: false
• Uses a reverse proxy: true
• IP Header check: true (CF-Connecting-IP)
• Internet access: true
• Internet access via a proxy: false
• DNS Check: true
• Time Check: true
• Domain Configuration Check: true
• HTTPS Check: true
• Database type: SQLite
• Database version: 3.35.4
• Clients used:
• Reverse proxy and version:
• Other relevant information:

Config (Generated via diagnostics page)

Show Running Config

Environment settings which are overridden:

{
  "_duo_akey": null,
  "_enable_duo": false,
  "_enable_email_2fa": true,
  "_enable_smtp": true,
  "_enable_yubico": true,
  "_ip_header_enabled": true,
  "admin_ratelimit_max_burst": 3,
  "admin_ratelimit_seconds": 300,
  "admin_token": "***",
  "allowed_iframe_ancestors": "",
  "attachments_folder": "data/attachments",
  "authenticator_disable_time_drift": false,
  "data_folder": "data",
  "database_max_conns": 10,
  "database_url": "****/**.*******",
  "db_connection_retries": 15,
  "disable_2fa_remember": false,
  "disable_admin_token": false,
  "disable_icon_download": false,
  "domain": "*****://*********.******************.**",
  "domain_origin": "*****://*********.******************.**",
  "domain_path": "",
  "domain_set": true,
  "duo_host": null,
  "duo_ikey": null,
  "duo_skey": null,
  "email_attempts_limit": 3,
  "email_expiration_time": 600,
  "email_token_size": 6,
  "emergency_access_allowed": true,
  "emergency_notification_reminder_schedule": "0 5 * * * *",
  "emergency_request_timeout_schedule": "0 5 * * * *",
  "enable_db_wal": true,
  "extended_logging": true,
  "helo_name": null,
  "hibp_api_key": null,
  "icon_blacklist_non_global_ips": true,
  "icon_blacklist_regex": null,
  "icon_cache_folder": "data/icon_cache",
  "icon_cache_negttl": 259200,
  "icon_cache_ttl": 2592000,
  "icon_download_timeout": 10,
  "icon_redirect_code": 302,
  "icon_service": "internal",
  "incomplete_2fa_schedule": "30 * * * * *",
  "incomplete_2fa_time_limit": 3,
  "invitation_org_name": "",
  "invitations_allowed": true,
  "ip_header": "CF-Connecting-IP",
  "job_poll_interval_ms": 30000,
  "log_file": null,
  "log_level": "Info",
  "log_timestamp_format": "%Y-%m-%d %H:%M:%S.%3f",
  "login_ratelimit_max_burst": 10,
  "login_ratelimit_seconds": 60,
  "org_attachment_limit": null,
  "org_creation_users": "",
  "password_iterations": 100000,
  "reload_templates": false,
  "require_device_email": false,
  "rsa_key_filename": "data/rsa_key",
  "send_purge_schedule": "0 5 * * * *",
  "sends_allowed": true,
  "sends_folder": "data/sends",
  "show_password_hint": false,
  "signups_allowed": false,
  "signups_domains_whitelist": "",
  "signups_verify": true,
  "signups_verify_resend_limit": 6,
  "signups_verify_resend_time": 3600,
  "smtp_accept_invalid_certs": false,
  "smtp_accept_invalid_hostnames": false,
  "smtp_auth_mechanism": null,
  "smtp_debug": false,
  "smtp_explicit_tls": false,
  "smtp_from": "*******@******************.**",
  "smtp_from_name": "Vaultwarden",
  "smtp_host": "****.*****.***",
  "smtp_password": "***",
  "smtp_port": 587,
  "smtp_ssl": true,
  "smtp_timeout": 15,
  "smtp_username": "**********",
  "templates_folder": "data/templates",
  "trash_auto_delete_days": null,
  "trash_purge_schedule": "0 5 0 * * *",
  "use_syslog": false,
  "user_attachment_limit": null,
  "web_vault_enabled": true,
  "web_vault_folder": "web-vault/",
  "websocket_address": "0.0.0.0",
  "websocket_enabled": false,
  "websocket_port": 3012,
  "yubico_client_id": null,
  "yubico_secret_key": null,
  "yubico_server": null
}

• Install method:
  Docker

• Clients used:

• Reverse proxy and version:
  Caddy v2.4

• MySQL/MariaDB or PostgreSQL version:

• Other relevant details:

Steps to reproduce

Expected behaviour

Logs are recorded.

Actual behaviour

VW stopped recording logs. I tried to delete the vaulwarden.log file but it doesn't help.

Troubleshooting data

[BlackDex]

Your log_file is set to null.
Try to set a filename.

[Gandulf78]

You're right. I missed that.
Thank you.