admin
0d8f5b9600
- Add /health and /ready endpoints for load balancer health checks - Replace in-memory JWT token cache with Redis for multi-replica support - Reduce DB connection pool from 100 to 25 connections per replica - Add distributed rate limiting (100 req/min + 20 burst) using Redis - Implement circuit breakers for DB and Redis to prevent cascading failures This enables the service to scale horizontally with multiple replicas behind a load balancer without exhausting database connections or maintaining separate token caches per instance.
85 lines
2.1 KiB
Go
85 lines
2.1 KiB
Go
package handlers
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import (
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"authorization/db"
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"authorization/models"
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"authorization/redisclient"
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"context"
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"encoding/json"
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"net/http"
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"time"
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)
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// HealthHandler provides a basic liveness check
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// @Summary Health check endpoint
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// @Description Returns service health status for load balancer health checks
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// @Tags health
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// @Produce json
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// @Success 200 {object} HealthResponse
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// @Router /health [get]
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func HealthHandler(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("Content-Type", "application/json")
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w.WriteHeader(http.StatusOK)
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json.NewEncoder(w).Encode(models.HealthResponse{
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Status: "ok",
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})
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}
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// ReadyHandler checks if the service is ready to handle requests
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// @Summary Readiness check endpoint
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// @Description Returns readiness status including database and Redis connectivity
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// @Tags health
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// @Produce json
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// @Success 200 {object} HealthResponse
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// @Failure 503 {object} HealthResponse
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// @Router /ready [get]
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func ReadyHandler(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("Content-Type", "application/json")
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services := make(map[string]string)
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allHealthy := true
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// Check database
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if db.DB != nil {
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ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
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defer cancel()
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if err := db.DB.PingContext(ctx); err != nil {
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services["database"] = "unhealthy"
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allHealthy = false
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} else {
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services["database"] = "healthy"
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}
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} else {
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services["database"] = "not_initialized"
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allHealthy = false
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}
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// Check Redis
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if redisclient.RDB != nil {
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ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
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defer cancel()
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if _, err := redisclient.RDB.Ping(ctx).Result(); err != nil {
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services["redis"] = "unhealthy"
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allHealthy = false
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} else {
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services["redis"] = "healthy"
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}
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} else {
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services["redis"] = "not_initialized"
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allHealthy = false
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}
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status := "ready"
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statusCode := http.StatusOK
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if !allHealthy {
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status = "not_ready"
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statusCode = http.StatusServiceUnavailable
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}
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w.WriteHeader(statusCode)
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json.NewEncoder(w).Encode(models.HealthResponse{
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Status: status,
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Services: services,
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})
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}
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