1)you should be less than 23 years old.
2)you should be medically sound.

After you fulfill these criterias you can then give the following exams to join indian army,you can join logistic cadre in indian army:

1)CDSE: it is an exam conducted for graduates by UPSC twice an year and can get more information from :
www.upsc.gov.in

2)UES and SSC: these are the exams conducted by indian army and you can get more information for these enteries from:
www.indianarmy.nic.in/