现有版本：4.3.0.1
要升级版本：4.3.2.1
操作系统：ubuntu18.04
执行过程：
- obd mirror enable remote
- obd update
- obd mirror list oceanbase.community.stable | grep oceanbase-ce
- ALTER SYSTEM MAJOR FREEZE;
- obd cluster upgrade demo -c oceanbase-ce -V 4.3.2.1 --usable=41f689df615363ae5f3ef0bb49afdf302aa9f748fe1e505dd76190311f6e6cb6
结果：
Start observer ok
observer program health check ok
obshell program health check ok
Connect to observer 127.0.0.1:2881 ok
Exec upgrade_checker.py x
See https://www.oceanbase.com/product/ob-deployer/error-codes .
Trace ID: bcf9bee4-7fa8-11ef-8622-00163e061b64
If you want to view detailed obd logs, please run: obd display-trace bcf9bee4-7fa8-11ef-8622-00163e061b64
错误日志：
ob升级错误日志.txt (60.1 KB)
