目前需要nacos单机模式+单个mysql的部署方案。
docker compose naocs
nacos官网（Nacos Docker 快速开始）提供了docker-compose部署例子。
# 单机模式 Mysql
git clone https://github.com/nacos-group/nacos-docker.git
cd nacos-docker
docker-compose -f example/standalone-mysql.yaml up
但是发现standalone-mysql.yaml需要mysql部署master-slave，要提供2个mysql地址，具体见standalone-mysql.yaml，只填master会报错：
Caused by: java.lang.IllegalArgumentException: Could not resolve placeholder 'MYSQL_SLAVE_SERVICE_HOST' in value "jdbc:mysql://${MYSQL_SLAVE_SERVICE_HOST}:${MYSQL_SLAVE_SERVICE_PORT:3306}/${MYSQL_MASTER_SERVICE_DB_NAME}?characterEncoding=utf8&connectTimeout=1000&socketTimeout=3000&autoReconnect=true"
其实官网提供了一个控制参数
MYSQL_DATABASE_NUM 数据库数量 default :2
设置为1，则不需要提供slave的地址。
提供一份修改后的docker-compose文件作为参考，使用外部的mysql。
version: "2"
services:
nacos:
image: nacos/nacos-server:latest
container_name: nacos-standalone-mysql
environment:
- PREFER_HOST_MODE=hostname
- MODE=standalone
- SPRING_DATASOURCE_PLATFORM=mysql
- MYSQL_MASTER_SERVICE_HOST=xxx.xxx.xxx.xxx
- MYSQL_MASTER_SERVICE_DB_NAME=nacos
- MYSQL_MASTER_SERVICE_PORT=3306
- MYSQL_MASTER_SERVICE_USER=nacos
- MYSQL_MASTER_SERVICE_PASSWORD=nacos
- MYSQL_DATABASE_NUM=1
volumes:
- /home/nacos/logs:/home/nacos/logs
- /home/nacos/init.d/custom.properties:/home/nacos/init.d/custom.properties
ports:
- "8848:8848"
# restart: on-failure
其中：
SPRING_DATASOURCE_PLATFORM: 指定数据源。默认情况下，standalone模式使用内嵌数据库。如果要在standalone模式下使用mysql，需要指定。
注意：
- 提前创建nacos数据库和建表语句
- compose文件的volumes：
<宿主机>:<容器>。在宿主机建立对应文件夹，拷贝custom.properties文件。
k8s nacos
更新于2020.5.8： 在开发环境使用k8s部署单节点的nacos server，当时忘记指定standalone模式，默认是cluster，导致服务发现功能不正常：
容器内的启动脚本docker-startup.sh：
#===========================================================================================
# JVM Configuration
#===========================================================================================
if [[ "${MODE}" == "standalone" ]]; then
JAVA_OPT="${JAVA_OPT} -Xms512m -Xmx512m -Xmn256m"
JAVA_OPT="${JAVA_OPT} -Dnacos.standalone=true"
else
JAVA_OPT="${JAVA_OPT} -server -Xms${JVM_XMS} -Xmx${JVM_XMX} -Xmn${JVM_XMN} -XX:MetaspaceSize=${JVM_MS} -XX:MaxMetaspaceSize=${JVM_MMS}"
if [[ "${NACOS_DEBUG}" == "y" ]]; then
JAVA_OPT="${JAVA_OPT} -Xdebug -Xrunjdwp:transport=dt_socket,address=9555,server=y,suspend=n"
fi
JAVA_OPT="${JAVA_OPT} -XX:-OmitStackTraceInFastThrow -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=${BASE_DIR}/logs/java_heapdump.hprof"
JAVA_OPT="${JAVA_OPT} -XX:-UseLargePages"
print_servers
fi
怀疑是cluster模式下NACOS_SERVERS配置有问题：
NACOS_SERVERS: nacos-0.nacos-center.v-base.svc.cluster.local.:30848
先改为单机模式，后续再研究。以下是修改后的k8s yaml
---
apiVersion: v1
kind: Service
metadata:
name: nacos-center
labels:
app: nacos-center
namespace: v-base
spec:
ports:
- port: 30848
name: server
targetPort: 30848
nodePort: 30848
selector:
app: nacos
type: NodePort
---
apiVersion: v1
kind: ConfigMap
metadata:
name: nacos-cm
namespace: v-base
data:
mysql.master.db.name: "nacos"
mysql.master.port: "3306"
mysql.master.user: "xxx"
mysql.master.password: "xxx"
mysql.database.num: "1"
mysql.master.service.host: "mysql.v-base"
mode: "standalone"
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
name: nacos
namespace: v-base
spec:
serviceName: nacos-center
replicas: 1
template:
metadata:
labels:
app: nacos
annotations:
pod.alpha.kubernetes.io/initialized: "true"
spec:
affinity:
podAntiAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
- labelSelector:
matchExpressions:
- key: "app"
operator: In
values:
- nacos-center
topologyKey: "kubernetes.io/hostname"
containers:
- name: k8snacos
imagePullPolicy: IfNotPresent
image: xxx.com/base/nacos-server:1.1.4
resources:
limits:
memory: "8Gi"
cpu: "4000m"
requests:
memory: "1Gi"
cpu: "1000m"
ports:
- containerPort: 30848
name: client
env:
- name: NACOS_REPLICAS
value: "1"
- name: SPRING_DATASOURCE_PLATFORM
value: "mysql"
- name: MODE
valueFrom:
configMapKeyRef:
name: nacos-cm
key: mode
- name: MYSQL_MASTER_SERVICE_DB_NAME
valueFrom:
configMapKeyRef:
name: nacos-cm
key: mysql.master.db.name
- name: MYSQL_MASTER_SERVICE_PORT
valueFrom:
configMapKeyRef:
name: nacos-cm
key: mysql.master.port
- name: MYSQL_MASTER_SERVICE_USER
valueFrom:
configMapKeyRef:
name: nacos-cm
key: mysql.master.user
- name: MYSQL_MASTER_SERVICE_PASSWORD
valueFrom:
configMapKeyRef:
name: nacos-cm
key: mysql.master.password
- name: MYSQL_MASTER_SERVICE_HOST
valueFrom:
configMapKeyRef:
name: nacos-cm
key: mysql.master.service.host
- name: MYSQL_DATABASE_NUM
valueFrom:
configMapKeyRef:
name: nacos-cm
key: mysql.database.num
- name: NACOS_SERVER_PORT
value: "30848"
- name: PREFER_HOST_MODE
value: "hostname"
- name: NACOS_SERVERS
#value: "nacos-0.nacos-center.v-base.svc.cluster.local:8848 nacos-1.nacos-center.v-base.svc.cluster.local:8848 nacos-2.nacos-center.v-base.svc.cluster.local:8848"
value: "nacos-0.nacos-center.v-base.svc.cluster.local.:30848"
selector:
matchLabels:
app: nacos