create backup job,the backup job is fail

[qianfen2021]

Describe the problem

create backup job,but the backup job is fail.the container error info as follows:

To Reproduce

1.helm install release with localPVC
2.create cluster
3.create backup job

Expected behavior

Environment:

• RadonDB MySQL version:v2.3.0-alpha.1

[acekingke]

It because expr command do not support float number compare, use bc to replace it.