amberjs 1.16.1

JavaScript/TypeScript runtime built with Rust and V8
Documentation 
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// Metrics collection for HPA
use super::super::crd::CustomMetric;
/// Gathers resource usage metrics from Kubernetes
use kube::api::ListParams;
use tracing::{debug, warn};
/// Metrics client for collecting pod and resource metrics
pub struct MetricsClient {
    /// Kubernetes client
    #[allow(dead_code)]
    client: kube::Client,
    /// Namespace to collect metrics from
    #[allow(dead_code)]
    namespace: String,
}
impl MetricsClient {
    /// Create a new metrics client
    pub fn new(client: kube::Client, namespace: &str) -> Self {
        Self {
            client,
            namespace: namespace.to_string(),
        }
    }
    /// Collect pod metrics
    pub async fn collect_pod_metrics(
        &self,
        label_selector: &str,
    ) -> Result<PodMetricsSummary, Error> {
        let _params: _ = ListParams::default().labels(label_selector);
        // Note: Metrics API requires metrics-server to be installed in cluster
        // This is a simplified implementation that returns empty metrics when unavailable
        debug!("Collecting pod metrics with selector: {}", label_selector);
        // Return placeholder metrics - real implementation would query metrics-server
        Ok(PodMetricsSummary {
            total_pods: 0,
            total_cpu_millicores: 0.0,
            total_memory_bytes: 0.0,
            total_cpu_request: 0.0,
            total_memory_request: 0.0,
        })
    }
    /// Collect custom metrics
    pub async fn collect_custom_metrics(
        &self,
        metrics: &[CustomMetric],
    ) -> Result<HashMap<String, f64>, Error> {
        let mut result = HashMap::new();
        for metric in metrics {
            debug!("Collecting custom metric: {}", metric.name);
            let value: _ = match metric.metric_type.as_str() {
                "Pod" => self.collect_pod_metric(metric).await?,
                "Resource" => self.collect_resource_metric(metric).await?,
                _ => {
                    warn!("Unsupported metric type: {}", metric.metric_type);
                    continue;
                }
            };
            result.insert(metric.name.clone(), value);
        }
        Ok(result)
    }
    /// Collect a single pod metric
    async fn collect_pod_metric(&self, _metric: &CustomMetric) -> Result<f64, Error> {
        // TODO: Implement custom pod metric collection
        // This would involve querying external metrics API or custom metrics server
        Ok(0.0)
    }
    /// Collect a single resource metric
    async fn collect_resource_metric(&self, _metric: &CustomMetric) -> Result<f64, Error> {
        // TODO: Implement custom resource metric collection
        // This would involve querying resource metrics API
        Ok(0.0)
    }
}
/// Pod metrics summary
#[derive(Debug, Clone)]
pub struct PodMetricsSummary {
    /// Total number of pods
    pub total_pods: u32,
    /// Total CPU usage in millicores
    pub total_cpu_millicores: f64,
    /// Total memory usage in bytes
    pub total_memory_bytes: f64,
    /// Total CPU request in millicores
    pub total_cpu_request: f64,
    /// Total memory request in bytes
    pub total_memory_request: f64,
}
impl PodMetricsSummary {
    /// Calculate CPU usage percentage
    pub fn cpu_usage_percent(&self) -> f64 {
        if self.total_cpu_request > 0.0 {
            (self.total_cpu_millicores / self.total_cpu_request) * 100.0
        } else {
            0.0
        }
    }
    /// Calculate memory usage percentage
    pub fn memory_usage_percent(&self) -> f64 {
        if self.total_memory_request > 0.0 {
            (self.total_memory_bytes / self.total_memory_request) * 100.0
        } else {
            0.0
        }
    }
    /// Convert CPU millicores to cores
    pub fn cpu_cores(&self) -> f64 {
        self.total_cpu_millicores / 1000.0
    }
    /// Convert memory bytes to GB
    pub fn memory_gb(&self) -> f64 {
        self.total_memory_bytes / (1024.0 * 1024.0 * 1024.0)
    }
}
/// Parse CPU usage string (e.g., "100m", "1")
#[allow(dead_code)]
fn parse_cpu_usage(usage: &str) -> Option<f64> {
    if usage.ends_with('m') {
        // Millicores (e.g., "100m")
        let value: _ = usage.trim_end_matches('m');
        value.parse::<f64>().ok()
    } else {
        // Cores (e.g., "1")
        let value: _ = usage.parse::<f64>().ok()?;
        Some(value * 1000.0) // Convert to millicores
    }
}
/// Parse memory usage string (e.g., "1Gi", "100Mi")
#[allow(dead_code)]
fn parse_memory_usage(usage: &str) -> Option<f64> {
    if usage.ends_with("Ki") {
        let value: _ = usage.trim_end_matches("Ki").parse::<f64>().ok()?;
        Some(value * 1024.0)
    } else if usage.ends_with("Mi") {
        let value: _ = usage.trim_end_matches("Mi").parse::<f64>().ok()?;
        Some(value * 1024.0 * 1024.0)
    } else if usage.ends_with("Gi") {
        let value: _ = usage.trim_end_matches("Gi").parse::<f64>().ok()?;
        Some(value * 1024.0 * 1024.0 * 1024.0)
    } else if usage.ends_with("Ti") {
        let value: _ = usage.trim_end_matches("Ti").parse::<f64>().ok()?;
        Some(value * 1024.0 * 1024.0 * 1024.0 * 1024.0)
    } else {
        // Assume bytes
        usage.parse::<f64>().ok()
    }
}
/// Error type for metrics collection
#[derive(Debug, thiserror::Error)]
pub enum Error {
    #[error("Kubernetes error: {0}")]
    Kube(#[from] kube::Error),
    #[error("Parse error: {0}")]
    Parse(String),
    #[error("Other error: {0}")]
    Other(String),
}
#[cfg(test)]
mod tests {
    use super::*;
    #[test]
    fn test_parse_cpu_usage() {
        assert_eq!(parse_cpu_usage("100m"), Some(100.0));
        assert_eq!(parse_cpu_usage("1"), Some(1000.0));
        assert_eq!(parse_cpu_usage("0.5"), Some(500.0));
    }
    #[test]
    fn test_parse_memory_usage() {
        assert_eq!(parse_memory_usage("1024Ki"), Some(1024.0 * 1024.0));
        assert_eq!(parse_memory_usage("100Mi"), Some(100.0 * 1024.0 * 1024.0));
        assert_eq!(parse_memory_usage("1Gi"), Some(1024.0 * 1024.0 * 1024.0));
    }
    #[test]
    fn test_pod_metrics_summary() {
        let summary: _ = PodMetricsSummary {
            total_pods: 5,
            total_cpu_millicores: 500.0,
            total_memory_bytes: 1024.0 * 1024.0 * 1024.0, // 1GB
            total_cpu_request: 1000.0,
            total_memory_request: 2.0 * 1024.0 * 1024.0 * 1024.0, // 2GB
        };
        assert_eq!(summary.total_pods, 5);
        assert_eq!(summary.cpu_usage_percent(), 50.0); // 500/1000 * 100
        assert_eq!(summary.memory_usage_percent(), 50.0); // 1GB/2GB * 100
        assert_eq!(summary.cpu_cores(), 0.5); // 500m / 1000
        assert_eq!(summary.memory_gb(), 1.0);
    }
}
use std::collections::{BTreeMap, HashMap};