A general answer for this problem can not be given here with 100%. Here some hints:

• The problem you might be running in is called self plagiarism and different institutions allow/forbid different approaches here.
• If you are planning to write the thesis like this (which is absolutely your right) then:
• It is essential for you to get the guidelines of your university before (and save them somewhere where you will still be able to find even years later)
• Check the policy of the journals that you have published in - most journals allow to re-use published material in your thesis but make sure to also print out these guidelines and keep them.

A general answer for this problem can not be given here with 100%. Here some hints:

The problem you might be running in is called self plagiarism and different institutions allow/forbid different approaches here. If you are planning to write the thesis like this (which is absolutely your right) then:

1. It is essential for you to get the guidelines of your university before starting to write (and save them somewhere where you will still be able to find them even years later)
2. Check the policy of the journals that you have published in - most journals allow to re-use published material in your thesis but make sure to also print out these guidelines and keep them.

Checking with the university and the journals (and to have written proof of it!) might save you many troubles later. Because if someone later claims that you commited self plagiarism then you can always cite the official guidelines that were in place at the time when you wrote your thesis.

You should also check with your supervisor but just having his/her oral Ok might not be enough many years later.