We have what I believe to be a very straightforward ingress setup on GKE.
However, we started noticing random slowdowns almost immediately. On
further investigation it looked like the time to first byte (TTFB) was very
slow (1 - 3 seconds) but sporadically. Sometimes it would be a pre-flight
OPTIONS request, sometimes an application request, and other times on
static files. Even the echoserver would sporadically have a long TTFB.
I set up a portforward to one of the pods serving up our REST API server.
Sure enough, the slowdown was eliminated.
Before I go down the rabbit hole of trying other ingress controllers, I
figured I'd ask the community if I was doing something wrong.
ingress.yaml
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: brewd-ingress
spec:
tls:
- hosts:
- stage-api2.example.com
- stage-app2.example.com
- stage-echo.example.com
secretName: redacted
rules:
- host: stage-api2.example.com
http:
paths:
- backend:
serviceName: gateway-service
servicePort: 7000
- host: stage-app2.example.com
http:
paths:
- backend:
serviceName: web-service
servicePort: 8080
- host: stage-echo.example.com
http:
paths:
- backend:
serviceName: echoserver
servicePort: 8080
gateway-service.yaml
apiVersion: v1
kind: Service
metadata:
name: gateway-service
labels:
app: gateway
spec:
type: NodePort
ports:
- port: 7000
selector:
app: gateway
---
apiVersion: apps/v1beta2
kind: Deployment
metadata:
name: gateway-deployment
spec:
selector:
matchLabels:
app: gateway
replicas: 1
template:
metadata:
labels:
app: gateway
spec:
containers:
- name: gateway
image: us.gcr.io/redacted/gateway:1.3.0-rc.0
imagePullPolicy: Always
ports:
- containerPort: 7000
env:
- name: REDACTED_ENV
value: stage
The web-service yaml looks almost exactly the same as the above.
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