Egress 제어

Egress 제어는 메시 외부로 나가는 트래픽을 관리하고 보안을 강화하는 기능입니다.

목차

1. Egress 개요
2. ServiceEntry 설정
3. Egress Gateway
4. TLS Origination
5. 실전 예제

Egress 개요

ServiceEntry 설정

외부 서비스 등록

apiVersion: networking.istio.io/v1
kind: ServiceEntry
metadata:
  name: external-api
spec:
  hosts:
  - api.external.com
  ports:
  - number: 443
    name: https
    protocol: HTTPS
  location: MESH_EXTERNAL
  resolution: DNS

HTTP 외부 서비스

apiVersion: networking.istio.io/v1
kind: ServiceEntry
metadata:
  name: httpbin
spec:
  hosts:
  - httpbin.org
  ports:
  - number: 80
    name: http
    protocol: HTTP
  location: MESH_EXTERNAL
  resolution: DNS

Egress Gateway

Egress Gateway 설치

helm install istio-egressgateway istio/gateway \
  -n istio-system \
  --set labels.app=istio-egressgateway \
  --set labels.istio=egressgateway

Egress Gateway 구성

apiVersion: networking.istio.io/v1
kind: Gateway
metadata:
  name: istio-egressgateway
spec:
  selector:
    istio: egressgateway
  servers:
  - port:
      number: 443
      name: https
      protocol: HTTPS
    hosts:
    - api.external.com
    tls:
      mode: PASSTHROUGH
---
apiVersion: networking.istio.io/v1
kind: VirtualService
metadata:
  name: direct-external-through-egress-gateway
spec:
  hosts:
  - api.external.com
  gateways:
  - mesh
  - istio-egressgateway
  http:
  - match:
    - gateways:
      - mesh
      port: 80
    route:
    - destination:
        host: istio-egressgateway.istio-system.svc.cluster.local
        port:
          number: 443
  - match:
    - gateways:
      - istio-egressgateway
      port: 443
    route:
    - destination:
        host: api.external.com
        port:
          number: 443

참고 자료

• Istio Egress Traffic
• Egress Gateway