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seata docker 高可用部署的详细介绍

51自学网 2022-07-04 11:31:43
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版本

1.4.2
官方文档
dockerhub

启动

通过环境变量SEATA_CONFIG_NAME指定配置文件位置/root/seata-config/registry.conf

docker run --name seata-server /        -p 8091:8091 /        -e SEATA_CONFIG_NAME=file:/root/seata-config/registry /         -v /User/seata/config:/root/seata-config  /        seataio/seata-server

配置文件

实现高可用需要依赖注册中心,配置中心,数据库
registry.conf

registry {  type = "nacos"  nacos {    application = "seata-server"    serverAddr = "192.168.199.2"    namespace = "test"    group = "SEATA_GROUP"    cluster = "default"    username = ""    password = ""  }}config {  type = "nacos"    nacos {    serverAddr = "192.168.199.2"    namespace = "test"    group = "SEATA_GROUP"    username = ""    password = ""  }}

NACOS配置

注:使用nacos配置,需要在对应分组(SEATA_GROUP)下针对配置项目逐条配置文本值,而不是创建包含所有配置的properties文件,可以使用官方源码中的脚本导入
全部可用配置参考

1. 使用数据库

store.mode=db
store.db.datasource=druid
store.db.dbType=mysql
store.db.driverClassName=com.mysql.jdbc.Driver
store.db.url=jdbc:mysql://192.168.199.2:3306/seata?useUnicode=true&rewriteBatchedStatements=true
store.db.user=root
store.db.password=123456

创建数据库

建库脚本

-- -------------------------------- The script used when storeMode is 'db' ---------------------------------- the table to store GlobalSession dataCREATE TABLE IF NOT EXISTS `global_table`(    `xid`                       VARCHAR(128) NOT NULL,    `transaction_id`            BIGINT,    `status`                    TINYINT      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`                DATETIME,    `gmt_modified`              DATETIME,    PRIMARY KEY (`xid`),    KEY `idx_gmt_modified_status` (`gmt_modified`, `status`),    KEY `idx_transaction_id` (`transaction_id`)) ENGINE = InnoDB  DEFAULT CHARSET = utf8;-- the table to store BranchSession dataCREATE TABLE IF NOT EXISTS `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`            TINYINT,    `client_id`         VARCHAR(64),    `application_data`  VARCHAR(2000),    `gmt_create`        DATETIME(6),    `gmt_modified`      DATETIME(6),    PRIMARY KEY (`branch_id`),    KEY `idx_xid` (`xid`)) ENGINE = InnoDB  DEFAULT CHARSET = utf8;-- the table to store lock dataCREATE TABLE IF NOT EXISTS `lock_table`(    `row_key`        VARCHAR(128) NOT NULL,    `xid`            VARCHAR(128),    `transaction_id` BIGINT,    `branch_id`      BIGINT       NOT NULL,    `resource_id`    VARCHAR(256),    `table_name`     VARCHAR(32),    `pk`             VARCHAR(36),    `gmt_create`     DATETIME,    `gmt_modified`   DATETIME,    PRIMARY KEY (`row_key`),    KEY `idx_branch_id` (`branch_id`)) ENGINE = InnoDB  DEFAULT CHARSET = utf8;

异常处理

1. 客户端报错 Data too long for column ‘application_id'

io.seata.core.exception.TmTransactionException: TransactionException[begin global request failed. xid=null, msg=Data truncation: Data too long for column ‘application_id' at row 1]
at io.seata.tm.DefaultTransactionManager.begin(DefaultTransactionManager.java:55) ~[seata-all-1.3.0.jar:1.3.0]
at io.seata.tm.api.DefaultGlobalTransaction.begin(DefaultGlobalTransaction.java:104) ~[seata-all-1.3.0.jar:1.3.0]
at io.seata.tm.api.TransactionalTemplate.beginTransaction(TransactionalTemplate.java:175) ~[seata-all-1.3.0.jar:1.3.0]

seata数据库global_table.application_id字段默认长度为varchar(32),如果客户端应用ID超长则报此错
手动修改字段类型增加长度即可


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