跳到主要内容
版本:v1.2

Seata 高可用部署

Seata 的高可用依赖于注册中心、配置中心和数据库来实现

Seata-Server

Seata-Server 需要使用注册中心,并把事务数据保存到数据库中,以 Nacos 为例

  • 修改registry.conf的注册中心配置
registry {
type = "nacos"

nacos {
application = "seata-server"
serverAddr = "192.168.199.2"
namespace = ""
cluster = "default"
username = ""
password = ""
}
}

config {
type = "nacos"

nacos {
serverAddr = "192.168.199.2"
namespace = ""
group = "SEATA_GROUP"
username = ""
password = ""
}
}
  • 需要修改配置中心的以下几个配置(含db与redis,二者选其一 注:redis需seata-server 1.3版本及以上)
service.vgroupMapping.my_test_tx_group=default
store.mode=db|redis
-----db-----
store.db.datasource=druid
store.db.dbType=mysql
store.db.driverClassName=com.mysql.jdbc.Driver
store.db.url=jdbc:mysql://127.0.0.1:3306/seata?useUnicode=true
store.db.user=root
store.db.password=123456
----redis----
store.redis.host=127.0.0.1
store.redis.port=6379
store.redis.maxConn=10
store.redis.minConn=1
store.redis.database=0
store.redis.password=null
store.redis.queryLimit=100
  • db模式需要在数据库创建 global_table, branch_table, lock_table

相应的脚本在GitHub 的 /script/server/db/ 目录下

这样,启动多个seata-server,即可实现其高可用


以 Kubernetes 为例,部署文件参考:

apiVersion: v1
kind: Service
metadata:
name: seata-ha-server
namespace: default
labels:
app.kubernetes.io/name: seata-ha-server
spec:
type: ClusterIP
ports:
- port: 8091
protocol: TCP
name: http
selector:
app.kubernetes.io/name: seata-ha-server

---

apiVersion: apps/v1
kind: Deployment
metadata:
name: seata-ha-server
namespace: default
labels:
app.kubernetes.io/name: seata-ha-server
spec:
replicas: 3
selector:
matchLabels:
app.kubernetes.io/name: seata-ha-server
template:
metadata:
labels:
app.kubernetes.io/name: seata-ha-server
spec:
containers:
- name: seata-ha-server
image: docker.io/seataio/seata-server:latest
imagePullPolicy: IfNotPresent
env:
- name: SEATA_CONFIG_NAME
value: file:/root/seata-config/registry
ports:
- name: http
containerPort: 8091
protocol: TCP
volumeMounts:
- name: seata-config
mountPath: /root/seata-config
volumes:
- name: seata-config
configMap:
name: seata-ha-server-config


---
apiVersion: v1
kind: ConfigMap
metadata:
name: seata-ha-server-config
data:
registry.conf: |
registry {
type = "nacos"
nacos {
application = "seata-server"
serverAddr = "192.168.199.2"
}
}
config {
type = "nacos"
nacos {
serverAddr = "192.168.199.2"
group = "SEATA_GROUP"
}
}