k8s搭建nacos
原创
k8s搭建nacos
Nacos致力于帮助您发现、配置和管理微服务。Nacos提供了一组简单易用的特性集，帮助您快速实现动态服务发现、服务配置、服务元数据及流量管理。
Nacos帮助您更敏捷和容易地构建、交付和管理微服务平台。 Nacos是构建以“服务”为中心的现代应用架构 (例如微服务范式、云原生范式) 的服务基础设施。
下面我们来说下如何快速在k8s构建nacos，本次k8s集群是腾讯云的tke，支持云硬盘作为存储，如果是自建k8s，建议通过nfs作为持久化存储。
创建namespace部署nacos
创建一个namespace专门用来部署nacos。
# kubectl create ns nacos部署mysql服务
apiVersion: apps/v1
kind: Deployment
metadata:
name: mysql
namespace: nacos
labels:
name: mysql
spec:
replicas: 1
selector:
matchLabels:
name: mysql
template:
metadata:
labels:
name: mysql
spec:
containers:
- name: mysql
image: nacos/nacos-mysql:5.7
args:
- --ignore-db-dir=lost+found
ports:
- containerPort: 3306
volumeMounts:
- name: mysql-data
mountPath: /var/lib/mysql
env:
- name: MYSQL_ROOT_PASSWORD
value: "root"
- name: MYSQL_DATABASE
value: "nacos_devtest"
- name: MYSQL_USER
value: "nacos"
- name: MYSQL_PASSWORD
value: "nacos"
volumes:
- name: mysql-data
persistentVolumeClaim:
claimName: mysql
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: mysql
namespace: nacos
spec:
accessModes:
- ReadWriteOnce
resources:
requests:
storage: 10Gi
storageClassName: cbs
volumeMode: Filesystem
---
apiVersion: v1
kind: Service
metadata:
name: mysql
namespace: nacos
labels:
name: mysql
spec:
ports:
- port: 3306
targetPort: 3306
selector:
name: mysql部署mysql可以会遇到一个错误，这里加上参数–ignore-db-dir=lost+found即可，具体说明参考文档https://cloud.tencent.com/developer/article/1559866
[ERROR] --initialize specified but the data directory has files in it. Aborting. 部署nacos
---
apiVersion: v1
kind: Service
metadata:
name: nacos-headless
namespace: nacos
labels:
app: nacos
annotations:
service.alpha.kubernetes.io/tolerate-unready-endpoints: "true"
spec:
ports:
- port: 8848
name: server
targetPort: 8848
- port: 9848
name: client-rpc
targetPort: 9848
- port: 9849
name: raft-rpc
targetPort: 9849
## 兼容1.4.x版本的选举端口
- port: 7848
name: old-raft-rpc
targetPort: 7848
clusterIP: None
selector:
app: nacos
---
apiVersion: v1
kind: ConfigMap
metadata:
name: nacos-cm
namespace: nacos
data:
mysql.db.name: "nacos_devtest"
mysql.port: "3306"
mysql.user: "nacos"
mysql.password: "nacos"
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
name: nacos
namespace: nacos
spec:
serviceName: nacos-headless
replicas: 3
template:
metadata:
labels:
app: nacos
annotations:
pod.alpha.kubernetes.io/initialized: "true"
spec:
affinity:
podAntiAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
- labelSelector:
matchExpressions:
- key: "app"
operator: In
values:
- nacos
topologyKey: "kubernetes.io/hostname"
initContainers:
- name: peer-finder-plugin-install
image: nacos/nacos-peer-finder-plugin:1.1
imagePullPolicy: Always
volumeMounts:
- mountPath: /home/nacos/plugins/peer-finder
name: data
subPath: peer-finder
containers:
- name: nacos
imagePullPolicy: Always
image: nacos/nacos-server:latest
resources:
requests:
memory: "2Gi"
cpu: "500m"
ports:
- containerPort: 8848
name: client-port
- containerPort: 9848
name: client-rpc
- containerPort: 9849
name: raft-rpc
- containerPort: 7848
name: old-raft-rpc
env:
- name: NACOS_REPLICAS
value: "3"
- name: SERVICE_NAME
value: "nacos-headless"
- name: DOMAIN_NAME
value: "cluster.local"
- name: POD_NAMESPACE
valueFrom:
fieldRef:
apiVersion: v1
fieldPath: metadata.namespace
- name: MYSQL_SERVICE_DB_NAME
valueFrom:
configMapKeyRef:
name: nacos-cm
key: mysql.db.name
- name: MYSQL_SERVICE_PORT
valueFrom:
configMapKeyRef:
name: nacos-cm
key: mysql.port
- name: MYSQL_SERVICE_USER
valueFrom:
configMapKeyRef:
name: nacos-cm
key: mysql.user
- name: MYSQL_SERVICE_PASSWORD
valueFrom:
configMapKeyRef:
name: nacos-cm
key: mysql.password
- name: NACOS_SERVER_PORT
value: "8848"
- name: NACOS_APPLICATION_PORT
value: "8848"
- name: PREFER_HOST_MODE
value: "hostname"
volumeMounts:
- name: data
mountPath: /home/nacos/plugins/peer-finder
subPath: peer-finder
- name: data
mountPath: /home/nacos/data
subPath: data
- name: data
mountPath: /home/nacos/logs
subPath: logs
volumeClaimTemplates:
- metadata:
name: data
spec:
accessModes: [ "ReadWriteOnce" ]
resources:
requests:
storage: 10Gi
selector:
matchLabels:
app: nacos配置ingress访问ui页面
apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
annotations:
kubernetes.io/ingress.class: ingress
nginx.ingress.kubernetes.io/app-root: /nacos/index.html
name: nacos-ingress
namespace: nacos
spec:
rules:
- host: nacos.tke.niewx.cn
http:
paths:
- backend:
serviceName: nacos-headless
servicePort: 8848
path: /
pathType: ImplementationSpecificnacos还提供了ui管理页面，这里用ingress转发到后端的8848端口即可，默认的登录账号密码是nacos/nacos，注意这里需要加上nginx.ingress.kubernetes.io/app-root: /nacos/index.html这个注解，因为nacos的index页面没在根目录下。
upload-image
upload-image
nacos使用示例
- 服务注册
curl -X PUT 'http://cluster-ip:8848/nacos/v1/ns/instance?serviceName=nacos.naming.serviceName&ip=20.18.7.10&port=8080'- 服务发现
curl -X GET 'http://cluster-ip:8848/nacos/v1/ns/instance/list?serviceName=nacos.naming.serviceName'- 发布配置
curl -X POST "http://cluster-ip:8848/nacos/v1/cs/configs?dataId=nacos.cfg.dataId&group=test&content=helloWorld"- 获取配置
curl -X GET "http://cluster-ip:8848/nacos/v1/cs/configs?dataId=nacos.cfg.dataId&group=test"operator部署nacos
上面我们是通过yaml一步步部署nacos，如果您觉得麻烦，也可以用operator来部署nacos。
这里就不部署了，可以参考文档https://github.com/nacos-group/nacos-k8s/blob/master/operator/README-CN.md
helm部署nacos
nacos也提供了helm的方式部署，可以参考文档https://github.com/nacos-group/nacos-k8s/tree/master/helm
原创声明：本文系作者授权腾讯云开发者社区发表，未经许可，不得转载。
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