[英]Redis connection to 127.0.0.1:6379 failed - connect ECONNREFUSED 127.0.0.1:6379 nodejs
[英]Redis connect ECONNREFUSED in NodeJS in Kubernetes cluster
我正在部署具有 3 个副本的 NodeJS 服务器并连接到Redis以使用 Sub/Pub 功能。
节点:
const redis = require('redis');
const REDISPORT = 6379;
const subscriber = redis.createClient(REDISPORT, 'redis-service.default.svc.cluster.local');
const publisher = redis.createClient(REDISPORT, 'redis-service.default.svc.cluster.local');
所有三个 NodeJS pod 中的错误:
Error: Redis connection to redis-service.default.svc.cluster.local:6379 failed - connect ECONNREFUSED 10.120.14.77:6379
at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1141:16)
Emitted 'error' event on RedisClient instance at:
at RedisClient.on_error (/usr/src/app/node_modules/redis/index.js:341:14)
at Socket.<anonymous> (/usr/src/app/node_modules/redis/index.js:222:14)
at Socket.emit (events.js:315:20)
at emitErrorNT (internal/streams/destroy.js:92:8)
at emitErrorAndCloseNT (internal/streams/destroy.js:60:3)
at processTicksAndRejections (internal/process/task_queues.js:84:21) {
errno: 'ECONNREFUSED',
code: 'ECONNREFUSED',
syscall: 'connect',
address: '10.120.14.77',
port: 6379
}
你可以看到当我在 NodeJS pod 中使用'redis-service.default.svc.cluster.local'时,它会自动获取我的 Redis 服务 ip 10.120.14.77:6379 。
当我检查“kubectl get svc redis”时,我的Redis服务IP与10.120.14.77:6379相同
- kubectl get svc redis
redis-service ClusterIP 10.120.14.77 <none> 6379/TCP 74s
- kubectl logs redis
27 Sep 2020 08:41:20.309 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
服务器部署.yml:
apiVersion: apps/v1
kind: Deployment
metadata:
name: car-server-deployment
spec:
replicas: 3
template:
metadata:
labels:
app: car-server
spec:
containers:
- name: car-server
image: gcr.io/PROJECT_ID/IMAGE_SERVER:TAG
ports:
- containerPort: 8080
name: nodejs-port
selector:
matchLabels:
app: car-server
服务器-service.yml:
apiVersion: v1
kind: Service
metadata:
name: car-server-service
spec:
ports:
- port: 8080
protocol: TCP
selector:
app: car-server
type: NodePort
redis-pod.yml:
apiVersion: v1
kind: Pod
metadata:
name: redis
labels:
app: redis
spec:
containers:
- name: redis
image: redis:5.0.4
command:
- redis-server
env:
- name: MASTER
value: "true"
ports:
- containerPort: 6379
redis-service.yml:
apiVersion: v1
kind: Service
metadata:
name: redis-service
spec:
ports:
- port: 6379
protocol: TCP
selector:
app: redis
type: ClusterIP
尝试了几个小时,终于解决了。 当我创建kustomization.yml时,这是一个小错误。 因此,基本上与Redis或NodeJS无关。
上一个错误文件: kustomization.yml:
apiVersion: kustomize.config.k8s.io/v1beta1
kind: Kustomization
commonLabels:
app: my-app
bases:
- ./yaml
我把 commonLabels 放在这里,kustomize 覆盖了我的 Redis 标签并导致网络错误。
这是因为我还在我的 redis pod 中使用了“ app label ”。
新文件: kustomization.yml:
apiVersion: kustomize.config.k8s.io/v1beta1
kind: Kustomization
bases:
- ./yaml
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