Migrate Confluence from Windows to Linux data Center

[niranjan]

Hello Community, 

In our production there are two Confluence instances. We are planning to migrate or consolidate the two instances and make it as one. I need tips and suggestion for how to achieve this migration. 

Note: we got the task to migrate all the data from Instance A to instance B. Currently there are no non-prod environments setup. 

Instance A -

• Current Confluence Version - V 6.4.1 

• Operating System- Windows Server 2012 R3

• Application Server - Apache Tomcat V 8.0.43

• Database - H2 database

• Database Version - V 1.3.176

• Database Driver Version -  V 1.3.176

• Java Version - V 1.8.0_131

• JVM Version - V 1.8

Instance B- 

• Current Confluence Version - V 7.1.3.7

• Operating System- Linux 5.15.0-1034-azure ( Datacenter with HA ) 

• Application Server - Apache Tomcat V 9.0.63

• Database - PostgreSQL database

• Database Version - V 14.7

• Database Driver Version - V 42.2.18

• Java Version - V 11.0.14.1

• JVM Version - V 11

[Robert Wen_Cprime_]

Hello @niranjan 

Ordinarily I'd say that you could export your spaces on Instance A as XML (backup) and then import them into Instance B.

According to these docs here, you should be able to import the XML zip file created on Instance A into Instance B.

https://confluence.atlassian.com/conf64/export-content-to-word-pdf-html-and-xml-936510554.html#ExportContenttoWord,PDF,HTMLandXML-NotesonXMLexporting

Good luck!

[niranjan]

Hello @Robert Wen_Cprime_ 

Thank you for the solution.  If we do XML import on instance B does the existing data on the instance B gets wiped out and imported data will only be there ? Also how to import the attachments, images, add-ons which are there on instance A ? please suggest. 

Thanks

Niranjan

[Robert Wen_Cprime_]

Take a look at the following knowledgebase article

https://confluence.atlassian.com/conf64/restoring-a-space-936511534.html

It should get everything you need for the space (except users and groups, I believe)

I also don't think it will overwrite the data on Instance B.

[niranjan]

Thanks for the information.