After the migration is complete I need to transfer my data from the embedded H2 database to MySQL database. How can I do this? Is 5.7 the last supported version of MySQL?
Export it to XML, build your new Jira system (on exactly the same version of Jira) connected to a supported version of MySQL, but empty, then import the xml. Then you can upgrade that to the latest version.
See https://confluence.atlassian.com/adminjiraserver/switching-databases-938846867.html for changing the database
If I create a new JIRA instance connected to MySQL supported by JIRA 7.0.0, import an XML backup file then I will not only need to update JIRA, but also MySQL, right?
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