seata docker 高可用部署的詳細介紹

版本

1.4.2
官方文檔
dockerhub

啟動

通過環境變量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

實現高可用需要依賴註冊中心,配置中心,數據庫
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

註:使用nacos配置,需要在對應分組(SEATA_GROUP)下針對配置項目逐條配置文本值,而不是創建包含所有配置的properties文件,可以使用官方源碼中的腳本導入
全部可用配置參考

1. 使用數據庫

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

創建數據庫

建庫腳本

-- -------------------------------- The script used when storeMode is 'db' --------------------------------
-- the table to store GlobalSession data
CREATE 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 data
CREATE 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 data
CREATE 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;

異常處理

1. 客戶端報錯 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數據庫global_table.application_id字段默認長度為varchar(32),如果客戶端應用ID超長則報此錯
手動修改字段類型增加長度即可

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