open:istiod [EL]

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# istiod : istio daemon

  - [[pilot]] : [[CRD]] (CustomResourceDefinition) 을 [[SidecarProxy]]가 이해할 수 있는 형식으로 변환 및 전파
  - [[galley]] : [[Kubernetes]] yaml 파일을 [[istio]]가 이해할 수 있는 형식으로 변환
  - [[citadel]] : 인증 관리 ([[TLS]] certification 등)



## 삭제 실패시

<code>
pod eviction error ("error evicting pod: istio-system/istiod-65f486565f-zhwzl: Cannot evict pod as it would violate the pod's disruption budget.") on node ip-192-168-3-169.ap-northeast-2.compute.internal
...
</code>

### 내용 확인

<code>
kubectl get deployment.apps/istiod -n istio-system -o yaml
</code>

#### replicas=3

<code>
kubectl scale --replicas=3 deployment/istiod -n istio-system
</code>

### 내용 확인

<code>
kubectl set replica deployment.apps/istio-ingressgateway -n istio-system
</code>

#### replicas=3

<code>
kubectl scale --replicas=3 deployment/istio-ingressgateway -n istio-system
</code>