I mean migrating the data from serverA to serverB.
I just replace serverB with ServerA’s /opt/clearml/data .

Yes, the latest version.

VictoriousPenguin97 I'm assuming the exact same server version ?

And you have the exact same folder structure / content, and server A/B give a different set of experiments ?
(is serverB empty, meaning no experiments at all?)

I'm not entirely sure which steps you took and if you missed something. Elastic is complaining about permissions - Maybe you missed one of the steps?

Looks like a permissions issue:
nested: IOException[failed to test writes in data directory [/usr/share/elasticsearch/data/nodes/0/indices/mQ-x_DoZQ-iZ7OfIWGZ72g/_state] write permission is required]; nested

Is it ok if the path of ServerA and ServerB is difference.
For example, ServerA stores file at /opt/clearml but ServeB stores at /some_path/clearml

VictoriousPenguin97 basically spin down sereverA (this should flush all DBs) then copy /opt/clearml to the new server and spin it with docker-compose. As long as the new server is on the same address as the previous one, everything should work out of the box

Oh, I just realized that the mondo version between ServerA and ServerB is mismatch.
The problem was resolved by updating the mongo image to 4.0.23 as serverA.

I already did
chmod 777 on /opt/clearml/data or there’s other folders I need to grant the permission

Nice!

I’ve follow the installation steps that mentioned in this page
https://clear.ml/docs/latest/docs/deploying_clearml/clearml_server_linux_mac/

Then I replaced /opt/clearml/data of ServerB by ServerA /opt/clearml/data .

Did I migrate the data correctly using the steps I took?

After I did
docker-compose -f docker-compose.yml down docker-compose -f docker-compose.yml up -d
Then elasticsearch container got this error

ElasticsearchException[failed to bind service]; nested: IOException[failed to test writes in data directory [/usr/share/elasticsearch/data/nodes/0/indices/mQ-x_DoZQ-iZ7OfIWGZ72g/_state] write permission is required]; nested: AccessDeniedException[/usr/share/elasticsearch/data/nodes/0/indices/mQ-x_DoZQ-iZ7OfIWGZ72g/_state/.es_temp_file]; clearml-elastic | Likely root cause: java.nio.file.AccessDeniedException: /usr/share/elasticsearch/data/nodes/0/indices/mQ-x_DoZQ-iZ7OfIWGZ72g/_state/.es_temp_file clearml-elastic | at java.base/sun.nio.fs.UnixException.translateToIOException(UnixException.java:90) clearml-elastic | at java.base/sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:106) clearml-elastic | at java.base/sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:111) clearml-elastic | at java.base/sun.nio.fs.UnixFileSystemProvider.newByteChannel(UnixFileSystemProvider.java:219) clearml-elastic | at java.base/java.nio.file.Files.newByteChannel(Files.java:380) clearml-elastic | at java.base/java.nio.file.Files.createFile(Files.java:658) clearml-elastic | at org.elasticsearch.env.NodeEnvironment.tryWriteTempFile(NodeEnvironment.java:1313) clearml-elastic | at org.elasticsearch.env.NodeEnvironment.assertCanWrite(NodeEnvironment.java:1284) clearml-elastic | at org.elasticsearch.env.NodeEnvironment.<init>(NodeEnvironment.java:342) clearml-elastic | at org.elasticsearch.node.Node.<init>(Node.java:427) clearml-elastic | at org.elasticsearch.node.Node.<init>(Node.java:309) clearml-elastic | at org.elasticsearch.bootstrap.Bootstrap$5.<init>(Bootstrap.java:234) clearml-elastic | at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:234) clearml-elastic | at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:434) clearml-elastic | at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:166) clearml-elastic | at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:157) clearml-elastic | at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:77) clearml-elastic | at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:112) clearml-elastic | at org.elasticsearch.cli.Command.main(Command.java:77) clearml-elastic | at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:122) clearml-elastic | at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:80) clearml-elastic | For complete error details, refer to the log at /usr/share/elasticsearch/logs/clearml.log

Hello, after did the steps you mentioned https://clearml.slack.com/archives/CTK20V944/p1659702067809619?thread_ts=1659694970.919069&cid=CTK20V944
The server is now can start properly but Clearml UI doesn’t show any experiments that I cloned from serverA. Any suggestion? thank you!

For example, ServerA stores file at /opt/clearml but ServeB stores at /some_path/clearml

As long as you adjust your docker-compose yaml file, should be just fine