环境准备
K8S环境（如果没有K8S环境，文中还提供了Docker的部署方式）
nacos地址：172.20.1.11:8848
postgres地址：172.20.1.11:5432
参考官方文档
Seata Server部署
1. 数据库准备
新建数据库seata
执行脚本
-- the table to store GlobalSession data
CREATE TABLE IF NOT EXISTS public.global_table
(
xid VARCHAR(128) NOT NULL,
transaction_id BIGINT,
status SMALLINT NOT NULL,
application_id VARCHAR(32),
transaction_service_group VARCHAR(32),
transaction_name VARCHAR(128),
timeout INT,
begin_time BIGINT,
application_data VARCHAR(2000),
gmt_create TIMESTAMP(0),
gmt_modified TIMESTAMP(0),
CONSTRAINT pk_global_table PRIMARY KEY (xid)
);
CREATE INDEX idx_gmt_modified_status ON public.global_table (gmt_modified, status);
CREATE INDEX idx_transaction_id ON public.global_table (transaction_id);
-- the table to store BranchSession data
CREATE TABLE IF NOT EXISTS public.branch_table
(
branch_id BIGINT NOT NULL,
xid VARCHAR(128) NOT NULL,
transaction_id BIGINT,
resource_group_id VARCHAR(32),
resource_id VARCHAR(256),
branch_type VARCHAR(8),
status SMALLINT,
client_id VARCHAR(64),
application_data VARCHAR(2000),
gmt_create TIMESTAMP(6),
gmt_modified TIMESTAMP(6),
CONSTRAINT pk_branch_table PRIMARY KEY (branch_id)
);
CREATE INDEX idx_xid ON public.branch_table (xid);
-- the table to store lock data
CREATE TABLE IF NOT EXISTS public.lock_table
(
row_key VARCHAR(128) NOT NULL,
xid VARCHAR(96),
transaction_id BIGINT,
branch_id BIGINT NOT NULL,
resource_id VARCHAR(256),
table_name VARCHAR(32),
pk VARCHAR(36),
gmt_create TIMESTAMP(0),
gmt_modified TIMESTAMP(0),
CONSTRAINT pk_lock_table PRIMARY KEY (row_key)
);
CREATE INDEX idx_branch_id ON public.lock_table (branch_id);
2.新建配置文件registry.conf
mkdir -p /data/seata
cd /data/seata
touch registry.conf
输入
registry {
# file 、nacos 、eureka、redis、zk、consul、etcd3、sofa
type = "nacos"
nacos {
application = "seata-server"
serverAddr = "172.20.1.11:8848"
group = "DEFAULT_GROUP"
namespace = "62821698-55ee-4b60-9bf3-bfc8eab0987f"
cluster = "default"
username = "nacos"
password = "nacos"
}
}
config {
# file、nacos 、apollo、zk、consul、etcd3
type = "nacos"
nacos {
serverAddr = "172.20.1.11:8848"
group = "DEFAULT_GROUP" # 使用默认分组
namespace = "62821698-55ee-4b60-9bf3-bfc8eab0987f"
username = "nacos"
password = "nacos"
}
}
3. 导入nacos配置
参考
git clone 下来，修改config.txt，这里删掉了部分配置，仅保留项目所需的。（请根据实际项目进行修改）
# 修改事务组。注意：客户端接入时，在yml文件中配置的组需要和这里对应
service.vgroupMapping.seata_tx_group=default
# 修改seata服务访问地址。使用K8S，这里配置的是映射出来的虚拟地址
service.default.grouplist=172.20.1.11:8091
# 配置数据库
store.db.datasource=druid
store.db.dbType=postgresql
store.db.driverClassName=org.postgresql.Driver
store.db.url=jdbc:postgresql://172.20.1.11:5432/seata
store.db.user=username
store.db.password=password
将config.txt上传到Nacos配置中心
cd /seata/script/config-center/nacos
chmod +x nacos-config.sh
./nacos-config.sh -h 172.20.1.11 -p 8848 -g DEFAULT_GROUP -t 62821698-55ee-4b60-9bf3-bfc8eab0987f -u nacos -w nacos
4. K8S部署seata server
4.1 新建命名空间
kubectl create ns cym
备注：如果使用默认的命名空间，此步骤可以省略。但是需同步修改seata-server.yaml中的namespace
4.2 新建配置文件seata-server.yaml
touch seata-server.yaml
输入
apiVersion: apps/v1
kind: Deployment
metadata:
name: seata
namespace: cym
spec:
replicas: 1
selector:
matchLabels:
app: seata
template:
metadata:
labels:
app: seata
spec:
tolerations:
- key: node.kubernetes.io/not-ready
effect: NoExecute
tolerationSeconds: 10
- key: node.kubernetes.io/unreachable
operator: Exists
effect: NoExecute
tolerationSeconds: 10
containers:
- name: seata
image: seataio/seata-server:1.3.0
imagePullPolicy: "IfNotPresent"
ports:
- containerPort: 8091
env:
- name: SEATA_CONFIG_NAME
value: file:/root/registry
volumeMounts:
- mountPath: /dev/shm
name: cache-volume
- mountPath: /root/registry.conf
name: registry-conf
- mountPath: /etc/localtime
name: localtime
readOnly: true
volumes:
- emptyDir:
medium: Memory
name: cache-volume
- name: registry-conf
hostPath:
path: "/data/seata/registry.conf"
- name: localtime
hostPath:
path: "/etc/localtime"
initContainers:
- command:
- sysctl
- -w
- net.ipv4.tcp_max_syn_backlog=8192
image: busybox:1.32
name: init-tcpmaxsyn
securityContext:
privileged: true
- command:
- sysctl
- -w
- net.core.somaxconn=8192
image: busybox:1.32
name: init-somaxconn
securityContext:
privileged: true
---
apiVersion: v1
kind: Service
metadata:
name: seata
namespace: cym
labels:
app: seata
spec:
type: NodePort
ports:
- port: 8091
targetPort: 8091
nodePort: 8091 # nodePort默认30000-32767，请按实际情况 配置端口范围 或 修改此端口配置
selector:
app: seata
4.3. 启动seata server
kubectl apply -f seata-server.yaml
4.4 查看部署结果
root@k8s-01:~# kubectl get pod -n cym
NAME READY STATUS RESTARTS AGE
seata-cym-77d49dcc4-kvrn7 1/1 Running 15 12d
附：Docker部署seata server
执行步骤1、2、3，略过4（K8S）
docker run --name seata-server \
-p 8091:8091 \
-e SEATA_CONFIG_NAME=file:/root/seata-config/registry \ # 容器内部文件
-v /data/seata:/root/seata-config \ # 容器外部目录:容器内部目录
--privileged=true \
-d seataio/seata-server:1.3.0
客户端集成Seata
准备spring boot项目，基于maven构建
1. 业务数据库
新增表undo_log。参考
CREATE TABLE IF NOT EXISTS public.undo_log
(
id SERIAL NOT NULL,
branch_id BIGINT NOT NULL,
xid VARCHAR(100) NOT NULL,
context VARCHAR(128) NOT NULL,
rollback_info BYTEA NOT NULL,
log_status INT NOT NULL,
log_created TIMESTAMP(0) NOT NULL,
log_modified TIMESTAMP(0) NOT NULL,
CONSTRAINT pk_undo_log PRIMARY KEY (id),
CONSTRAINT ux_undo_log UNIQUE (xid, branch_id)
);
CREATE SEQUENCE IF NOT EXISTS undo_log_id_seq INCREMENT BY 1 MINVALUE 1 ;
2. pom.xml引入依赖
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-starter-alibaba-seata</artifactId>
<version>2.2.3.RELEASE</version>
</dependency>
3. 修改yml配置文件
spring:
cloud:
nacos:
discovery:
server-addr: 172.20.1.11:8848
namespace: 62821698-55ee-4b60-9bf3-bfc8eab0987f
config:
server-addr: 172.20.1.11:8848
namespace: 62821698-55ee-4b60-9bf3-bfc8eab0987f
file-extension: yml
seata:
enabled: true
application-id: ${spring.application.name}-seata # 不配置，默认使用spring服务名
enable-auto-data-source-proxy: true
tx-service-group: seata_tx_group # 注意：必须和Seata server中配的分组一致
config:
type: nacos
nacos:
server-addr: 172.20.1.11:8848
namespace: 62821698-55ee-4b60-9bf3-bfc8eab0987f
group: DEFAULT_GROUP
registry:
type: nacos
nacos:
application: seata-server
server-addr: 172.20.1.11:8848
namespace: 62821698-55ee-4b60-9bf3-bfc8eab0987f
group: DEFAULT_GROUP
4. 修改代码
在需要分布式事务的类方法上添加注解
@GlobalTransactional(rollbackFor = Exception.class)
至此，完成seata的部署和spring boot的集成
