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Thread: Upgrade to centos 7 without reinstall

  1. #1
    Join Date
    Mar 2017
    Location
    Rotterdam
    Posts
    13

    Upgrade to centos 7 without reinstall

    Hello dear people,

    I have a server running on centos 6 with directadmin and all my websites and it is time to update to centos 7.
    Is there a way to do this without reinstall everything?

    Just update the centos version?

    Kind regards
    Alex

  2. #2
    Join Date
    Apr 2005
    Location
    GMT +7.00
    Posts
    13,805
    Hello Alex,

    You can try it on your own risk using one of the following guides: https://www.google.com/search?q=cent...lace%20upgrade

    I've never tested any of them, as it is much more stable to reinstall a VPS with CentOS 7 and migrate users. This is how I migrated recently my own servers from CentOS 6 to 7.
    Regards, Alex G.

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  3. #3
    Join Date
    Jun 2019
    Posts
    1

    I think you should resintall OS

    I think you should resintall OS.

  4. #4
    Join Date
    Jan 2013
    Posts
    163
    Centos 8 will be available soon!
    https://wiki.centos.org/About/Building_8
    Probe my IP

  5. #5
    Join Date
    Sep 2019
    Posts
    1
    Hello,

    I am thinking about migrate to CentOS 7 and I don't know if I reinstall it, when I migrate users I will have any problem or I will loose the users. I will contract a new VPS and install CentOS 7 and migrate it. If all is ok I will halt old server and if I have problems I will be using the old server

  6. #6
    Join Date
    Oct 2008
    Posts
    328
    I recommend to you reinstall CentOS because many years ago I did an upgrade on fly and the result not was succesuful. (CentOS 5 to 6)

  7. #7
    Join Date
    Jul 2008
    Location
    Maastricht
    Posts
    4,213
    Upgrading is not advisable, but you're talking about migrating.
    So doing a new Centos 7 installation an a new VPS and when finished, installing Directadmin on there and migrate your users. This can be done via admin backup/transfer.

    You want to know if you will have any problem or loose users.
    You won't loose users normally when transferring them all to the new VPS. As said, admin backup/transfer is normally a preferred way to do this.

    However, things can change. To prevent certain issues occuring, it's best you match versions of what you're using on the old and new vps from Mysql/MariaDB and PHP.
    You can install a newer version of php, but older scripts of customers could loose their functionality then, so check this before.

    It's also possible to migrate the users from the old server Mysql to new vps with Mariadb, but you have to check versions!!! For example, if the old VPS is running mysql 5.7, it's wise to have MariaDB 10.2 running on the new server.

    Most safe way of migrating is to have MySQL and PHP versions the same on the old an new VPS and if needed convert or upgrade them afterwards.
    Greetings, Richard.

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