seata download website download center (seata.io)
The version I installed this time is seata.1.5.2 because the version of spring-cloud used in my project is 2021.0.4. I originally wanted to use seata1.6.1, but after my search, it is not compatible with the version I am currently using. My version is:
<spring-cloud.version>2021.0.4</spring-cloud.version> <spring-cloud-alibaba.version>2021.0.4.0</spring-cloud-alibaba.version>
After downloading, I uploaded it to the /usr/local/project via XFTP,
Use the name command tar -zxvf to decompress. After decompression, you will get a seata directory. Go to /usr/local/seata/conf to modify application.xml. Here I modify the default namespace. Before modifying this, first create a name in NACOS space,
After creation, you will get the ID of the namespace. The difference from the previous version is that seata1.5.2 can set the data-id in the config
The previous version needs to execute the script to publish the config.txt to nacos.
The data-id here can replace the previous script, as shown in the figure below, we can see data-id:seataServer.properties
Here we are looking at nacos, which is defined in the namespace of seata152.
seataServer.properties, only part of the code is added here.
#Transaction routing rules configuration, only for the client service.vgroupMapping.zhny-tx-group=default #If you use a registry, you can ignore it service.default.grouplist=127.0.0.1:8091 service.enableDegrade=false service.disableGlobalTransaction=false #Transaction storage configuration, only for the server. The file, DB, and redis configuration values are optional. store.mode=db store.lock.mode=db store.session.mode=db #Used for password encryption store.publicKey= store.db.datasource=druid store.db.dbType=mysql store.db.driverClassName=com.mysql.cj.jdbc.Driver store.db.url=jdbc:mysql://127.0.0.1:3306/zhny_seata?useUnicode=true & rewriteBatchedStatements=true store.db.user=root store.db.password=123456 store.db.minConn=5 store.db.maxConn=30 store.db.globalTable=global_table store.db.branchTable=branch_table store.db.distributedLockTable=distributed_lock store.db.queryLimit=100 store.db.lockTable=lock_table store.db.maxWait=5000
The group transaction here is named zhny-tx-group
Then there is the yml of the client in nacos, the tx-service-group inside: zhny-tx-group and
vgroup-mapping:
zhny-tx-group: default
The names of these two places must be consistent, because if there are two clients here, they belong to the same group of transactions.
# spring configuration
spring:
redis:
host: localhost
port: 6379
password:
datasource:
druid:
stat-view-servlet:
enabled: true
loginUsername: admin
loginPassword: 123456
dynamic:
druid:
initial-size: 5
min-idle: 5
maxActive: 20
maxWait: 60000
timeBetweenEvictionRunsMillis: 60000
minEvictableIdleTimeMillis: 300000
validationQuery: SELECT 1 FROM DUAL
testWhileIdle: true
testOnBorrow: false
testOnReturn: false
poolPreparedStatements: true
maxPoolPreparedStatementPerConnectionSize: 20
filters: stat, slf4j
connectionProperties: druid.stat.mergeSql\=true;druid.stat.slowSqlMillis\=5000
datasource:
# Main database data source
master:
driver-class-name: com.mysql.cj.jdbc.Driver
url: jdbc:mysql://127.0.01:3306/zhny_cloud?useUnicode=true &characterEncoding=utf8 &zeroDateTimeBehavior=convertToNull &useSSL=true &allowMultiQueries=true &serverTimezone=GMT+ 8
username: root
password: 123456
# From the database data source
# slave:
# username:
# password:
#url:
# driver-class-name:
seata: true
# seata configuration
seata:
enabled: true
# Seata application ID, defaults to ${spring.application.name}
application-id: zhny-basic
# Seata transaction group number, used for TC cluster name
tx-service-group: zhny-tx-group
# Turn off autoproxy
enable-auto-data-source-proxy: false
# service configuration item
service:
# Mapping of virtual groups and groups
vgroup-mapping:
zhny-tx-group: default
# Mapping of groups and Seata services
grouplist:
default: 127.0.0.1:8091
config:
# support: nacos, consul, apollo, zk, etcd3
type: nacos
nacos:
server-addr: 127.0.0.1:8848
namespace: 84d5f86a-7581-4f3b-af2e-82992cf0a31c
group: SEATA_GROUP
username: nacos
password: nacos
context-path:
##if use MSE Nacos with auth, mutex with username/password attribute
#access-key:
#secret-key:
data-id: seataServer.properties
registry:
# support: nacos, eureka, redis, zk, consul, etcd3, sofa
type: nacos
nacos:
application: seata-server
server-addr: 127.0.0.1:8848
group: SEATA_GROUP
namespace: 84d5f86a-7581-4f3b-af2e-82992cf0a31c
cluster: default
username: nacos
password: nacos
# mybatis configuration
mybatis:
# Search for the specified package alias
typeAliasesPackage: com.zhny.basic.domain
# Configure mapper scan to find all mapper.xml mapping files
mapperLocations: classpath:mapper/**/*.xml
# console print sql
#configuration:
#log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
The seata detailed code code is as follows
seat:
config:
# support: nacos, consul, apollo, zk, etcd3
type: nacos
nacos:
server-addr: 127.0.0.1:8848
namespace: 84d5f86a-7581-4f3b-af2e-82992cf0a31c
group: SEATA_GROUP
username: nacos
password: nacos
context-path:
##if use MSE Nacos with auth, mutex with username/password attribute
#access-key:
#secret-key:
data-id: seataServer.properties
registry:
# support: nacos, eureka, redis, zk, consul, etcd3, sofa
type: nacos
nacos:
application: seata-server
server-addr: 127.0.0.1:8848
group: SEATA_GROUP
namespace: 84d5f86a-7581-4f3b-af2e-82992cf0a31c
cluster: default
username: nacos
password: nacos
store:
# support: file, db, redis
mode: db
db:
datasource: druid
db-type: mysql
driver-class-name: com.mysql.cj.jdbc.Driver
url: jdbc:mysql://127.0.0.1:3306/zhny_seata?rewriteBatchedStatements=true
user: root # mysql user name
password: 123456 #mysql password
min-conn: 5
max-conn: 100
global-table: global_table
branch-table: branch_table
lock-table: lock_table
distributed-lock-table: distributed_lock
query-limit: 100
max-wait: 5000
# server:
# service-port: 8091 #If not configured, the default is '${server.port} + 1000'
security:
secretKey: SeataSecretKey0c382ef121d778043159209298fd40bf3850a017
tokenValidityInMilliseconds: 1800000
ignore:
urls: /,/**/*.css,/**/*.js,/**/*.html,/**/*.map,/**/*.svg,/**/*. png,/**/*.ico,/console-fe/public/**,/api/v1/auth/login
After the operation is completed, we can execute sh seata-server.sh under seata, and we can see that the operation is successful.
Then I want seata to perform automatic startup at boot, so I wrote a script.
# Write the service script
vim /lib/systemd/system/seata.service
[Unit] Description=seat After=nacos.service [Service] Type=forking ExecStart= /usr/local/seata/bin/seata-server.sh ExecStop=/usr/local/seata/bin/stop.sh PrivateTmp=true [Install] WantedBy=multi-user. target
According to the script written by others, the shutdown script stop.sh is changed, and the process is killed according to the PID started.
#!/bin/sh
cd /usr/local/seata/bin
PID=$(ps -ef | grep "seata-server" | grep -v grep | awk '{print $2}')
if [ ${PID} ];
then
echo 'Application is stpping...'
echo kill $PID DONE
kill $PID
else
echo 'Application is already stopped...'
fi
# Reload all service services
systemctl daemon-reload
# boot
systemctl enable seata.service
# Check if the service is enabled
systemctl is-enabled seata.service
# start the service
systemctl start seata.service
# Check the status of the service
systemctl status seata.service
# restart service
systemctl restart seata.service
Executing systemctl start seata.service found that an error was reported. I searched for this problem on the Internet for a day and a half. It is very strange. It can run normally in the bin directory, but it fails when added to the boot self-starting service!
Let’s take a look at the error message Exception in thread “main” java.lang.reflect.InvocationTargetException, we are rookie-level, after searching for a day to solve the information, we finally found a big cow in the blog.
The startup command in seata-server.sh, -Dloader.path=../lib uses relative path,
Only by executing seata-server.sh under the bin/ path of the seata package can the jar package in lib be correctly started
The packaging and startup methods of 1.5.2 have changed and the directory structure is also different, so I prefer his recommended method one
Method 1: Modify the seata-server.sh script (recommended)
vim user/local/seata/bin/seata-server.sh
Find the -Dloader.path=../lib configuration and change it to an absolute path: -Dloader.path=${BASEDIR}/lib
https://blog.csdn.net/weixin_43582081/article/details/125949859
So far, the problem has been solved, and the boot is successful!
