lerko
11848ce674
- Default TLS verification on, opt-in UPKEEP_INSECURE_SKIP_VERIFY - Alert webhooks use 10s timeout client, close response bodies - URL input validates http/https scheme for HTTP monitors - Stdlib logs route to stderr instead of discard - Panic on crypto/rand failure in token generation - Cluster startup warnings for non-HTTPS and missing secret - Replace demo SMTP creds with obvious placeholders - Color-coded log entries and scroll hints in logs tab
77 lines
1.8 KiB
Go
77 lines
1.8 KiB
Go
package cluster
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import (
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"fmt"
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"go-upkeep/internal/monitor"
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"net/http"
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"strings"
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"time"
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)
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type Config struct {
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Mode string // "leader" or "follower"
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PeerURL string // URL of the Leader (e.g., http://primary:8080)
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SharedKey string // Security Key
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}
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func Start(cfg Config) {
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if cfg.Mode == "leader" {
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fmt.Println("Cluster: Running as LEADER (Active)")
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if cfg.SharedKey != "" {
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fmt.Println("WARNING: Cluster mode enabled. Ensure the HTTP server is behind a TLS-terminating proxy.")
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}
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monitor.SetEngineActive(true)
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return
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}
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if cfg.Mode == "follower" {
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fmt.Println("Cluster: Running as FOLLOWER (Passive)")
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if cfg.PeerURL != "" && !strings.HasPrefix(cfg.PeerURL, "https://") {
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fmt.Println("WARNING: Cluster peer URL is not HTTPS. Cluster secret will be sent in cleartext.")
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}
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monitor.SetEngineActive(false)
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go runFollowerLoop(cfg)
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}
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}
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func runFollowerLoop(cfg Config) {
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client := http.Client{Timeout: 2 * time.Second}
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// Failover Configuration
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failures := 0
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threshold := 3
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for {
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time.Sleep(5 * time.Second)
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req, _ := http.NewRequest("GET", cfg.PeerURL+"/api/health", nil)
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if cfg.SharedKey != "" {
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req.Header.Set("X-Upkeep-Secret", cfg.SharedKey)
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}
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resp, err := client.Do(req)
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isLeaderHealthy := false
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if err == nil && resp.StatusCode == 200 {
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isLeaderHealthy = true
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resp.Body.Close()
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}
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if isLeaderHealthy {
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failures = 0
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if monitor.IsEngineActive() {
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// Leader is back, yield
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monitor.SetEngineActive(false)
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monitor.AddLog("Cluster: Leader detected. Switching to PASSIVE.")
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}
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} else {
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failures++
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// If failures exceed threshold, take over
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if failures >= threshold && !monitor.IsEngineActive() {
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monitor.SetEngineActive(true)
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monitor.AddLog("Cluster: Leader Unreachable. Switching to ACTIVE.")
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}
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}
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}
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}
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