106 lines
3.2 KiB
Rust
106 lines
3.2 KiB
Rust
/*
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* Copyright (C) 2026 Fluxer Contributors
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*
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* This file is part of Fluxer.
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*
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* Fluxer is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Fluxer is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with Fluxer. If not, see <https://www.gnu.org/licenses/>.
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*/
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use std::env;
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use std::str::FromStr;
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#[derive(Debug, Clone, Copy, PartialEq, Eq, Default)]
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pub enum MetricsMode {
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#[default]
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ClickHouse,
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NoOp,
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}
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impl FromStr for MetricsMode {
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type Err = ();
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fn from_str(s: &str) -> Result<Self, Self::Err> {
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match s.to_lowercase().as_str() {
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"noop" | "no-op" | "no_op" | "none" | "disabled" => Ok(Self::NoOp),
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"clickhouse" | "ch" | "" => Ok(Self::ClickHouse),
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_ => Err(()),
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}
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}
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}
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#[derive(Debug, Clone)]
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pub struct Config {
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pub port: u16,
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pub metrics_mode: MetricsMode,
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pub clickhouse_url: String,
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pub clickhouse_database: String,
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pub clickhouse_user: String,
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pub clickhouse_password: String,
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pub alert_webhook_url: Option<String>,
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pub admin_endpoint: Option<String>,
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}
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impl Config {
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pub fn from_env() -> Result<Self, ConfigError> {
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let metrics_mode = env::var("METRICS_MODE")
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.ok()
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.and_then(|v| v.parse().ok())
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.unwrap_or_default();
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let clickhouse_url =
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env::var("CLICKHOUSE_URL").unwrap_or_else(|_| "http://localhost:8123".into());
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let clickhouse_database =
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env::var("CLICKHOUSE_DATABASE").unwrap_or_else(|_| "fluxer_metrics".into());
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let clickhouse_user = env::var("CLICKHOUSE_USER").unwrap_or_else(|_| "default".into());
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let clickhouse_password = env::var("CLICKHOUSE_PASSWORD").unwrap_or_default();
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if metrics_mode == MetricsMode::ClickHouse && clickhouse_url.is_empty() {
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return Err(ConfigError::EmptyEnvVar("CLICKHOUSE_URL"));
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}
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Ok(Self {
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port: env::var("METRICS_PORT")
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.ok()
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.and_then(|p| p.parse().ok())
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.unwrap_or(8080),
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metrics_mode,
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clickhouse_url,
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clickhouse_database,
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clickhouse_user,
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clickhouse_password,
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alert_webhook_url: env::var("ALERT_WEBHOOK_URL").ok().filter(|s| !s.is_empty()),
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admin_endpoint: env::var("FLUXER_ADMIN_ENDPOINT")
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.ok()
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.filter(|s| !s.is_empty()),
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})
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}
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}
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#[derive(Debug)]
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pub enum ConfigError {
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EmptyEnvVar(&'static str),
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}
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impl std::fmt::Display for ConfigError {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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match self {
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Self::EmptyEnvVar(var) => {
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write!(f, "required environment variable {var} is empty")
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}
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}
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}
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}
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impl std::error::Error for ConfigError {}
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