Fix prometheus metrics

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "redis-keys-stats"
-version = "0.3.0"
+version = "0.3.1"
 authors = ["Ermakov Oleg <github@ermakov.cc>"]
 edition = "2021"
 license = "MIT"

src/prometheus.rs

@@ -1,12 +1,11 @@
 use crate::config::Config;
 use crate::key_prefix::KeyPrefix;
 use crate::stats::Result;
-use crate::utils::get_masked_dsn;
+use crate::utils::get_dsn_host;
 use prometheus_client::encoding::text::encode;
 use prometheus_client::encoding::EncodeLabelSet;
 use prometheus_client::metrics::family::Family;
 use prometheus_client::metrics::gauge::Gauge;
-use prometheus_client::metrics::histogram::{exponential_buckets, Histogram};
 use prometheus_client::registry::Registry;
 use std::io::Cursor;
 use std::thread;
@@ -17,10 +16,7 @@ lazy_static! {
     static ref KEYS_COUNT_BY_PREFIX: Family<KeyPrefixLabel, Gauge> =
         Family::<KeyPrefixLabel, Gauge>::default();
     static ref ALL_KEYS_COUNT: Family<DsnLabel, Gauge> = Family::<DsnLabel, Gauge>::default();
-    static ref SCAN_DURATION: Family<DsnLabel, Histogram> =
-        Family::<DsnLabel, Histogram>::new_with_constructor(|| Histogram::new(
-            exponential_buckets(10.0, 1.5, 20)
-        ));
+    static ref SCAN_DURATION: Family<DsnLabel, Gauge> = Family::<DsnLabel, Gauge>::default();
     static ref REGISTRY: Registry = make_registry();
 }
 
@@ -49,13 +45,13 @@ pub fn start_metrics_server(port: u16) -> JoinHandle<()> {
 
 pub fn update_metrics(config: &Config, result: &Result) {
     KEYS_COUNT_BY_PREFIX.clear();
-    let dsn = get_masked_dsn(&config.dsn);
+    let dsn = get_dsn_host(&config.dsn);
 
     let dsn_label = DsnLabel { dsn: dsn.clone() };
 
     SCAN_DURATION
         .get_or_create(&dsn_label)
-        .observe(result.took.as_secs_f64());
+        .set(result.took.as_secs() as i64);
     ALL_KEYS_COUNT
         .get_or_create(&dsn_label)
         .set(result.root_prefix.keys_count as i64);

src/stats.rs

@@ -5,7 +5,7 @@ use indicatif::{ProgressBar, ProgressStyle};
 
 use crate::config::Config;
 use crate::key_prefix::KeyPrefix;
-use crate::utils::get_masked_dsn;
+use crate::utils::get_dsn_host;
 
 /// The result of the analysis
 pub struct Result {
@@ -74,8 +74,8 @@ fn analyze_count(config: &mut Config, prefix: &mut KeyPrefix) {
 /// Connect to redis
 fn connect_redis(dsn: &str) -> redis::Connection {
     let client = redis::Client::open(dsn)
-        .unwrap_or_else(|_| panic!("Failed to connect to redis ({})", get_masked_dsn(dsn)));
+        .unwrap_or_else(|_| panic!("Failed to connect to redis ({})", get_dsn_host(dsn)));
     client
         .get_connection()
-        .unwrap_or_else(|_| panic!("Failed to connect to redis ({})", get_masked_dsn(dsn)))
+        .unwrap_or_else(|_| panic!("Failed to connect to redis ({})", get_dsn_host(dsn)))
 }

src/utils.rs

@@ -1,8 +1,7 @@
-/// Get Redis DSN with password masked
-pub fn get_masked_dsn(dsn: &str) -> String {
-    let mut parts: Vec<&str> = dsn.split('@').collect();
-    if parts.len() == 2 {
-        parts[0] = "redis://***:***@";
-    }
-    parts.join("")
+use redis::ConnectionInfo;
+
+/// Get Redis DSN host
+pub fn get_dsn_host(dsn: &str) -> String {
+    let conn_info: ConnectionInfo = dsn.parse().expect("parsing redis url");
+    return format!("{}/{}", conn_info.addr, conn_info.redis.db);
 }