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[GatewayAPI/Traefik] (Error) Failed to verify certificate: x509: certificate has expired

Posted on March 6, 2026 By nim No Comments on [GatewayAPI/Traefik] (Error) Failed to verify certificate: x509: certificate has expired

Traefik đang cố kết nối HTTPS đến ArgoCD backend nhưng cert của ArgoCD đã expired từ 2025-10-01. Đây không phải lỗi Gateway API — Nginx trước đây bỏ qua verify cert backend (backend-protocol: HTTPS + Nginx mặc định skip verify), còn Traefik thì verify nghiêm ngặt hơn.

Thiết lập Global (cho toàn bộ Traefik)

Cách này sẽ khiến Traefik bỏ qua việc verify SSL đối với tất cả các backend. Bạn có thể bật tính năng này bằng cách thêm cờ (flag) vào Traefik deployment/daemonset.

Thêm argument này vào Traefik container:

--serverstransport.insecureskipverify=true

Nếu cài Traefik bằng Helm, thêm vào values.yaml

additionalArguments:
  - "--serverstransport.insecureskipverify=true"
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