documentation/docs/admin-guide/configuration/monitoring/journal_remote.md

Central Journal Server ( systemd-journal-remote)

The systemd-journal-remote daemon allows you to collect Journal logs from multiple other source Journal instances.

Journal Remote (server)

To start systemd-journal-remote needs

journal::remote::enable: true

The default configuration for the directory setup where the received log is saved is

journal::remote::directory: '/var/log/journal/remote'
journal::remote::directory::owner: 'systemd-journal-remote'
journal::remote::directory::group: 'systemd-journal-remote'

For transport per default http is used, but this can also be changed to https:

journal::remote::https::enable: true
journal::remote::https::key: ...
journal::remote::https::cert: ...
journal::remote::https::ca_chain: ...

Journal Upload (client)

On the client side the service is called systemd-journal-upload and it is configured with

journal::upload::enable: true
journal::upload::url: ...

Then there are some certificate options if required:

journal::upload::client_key: ...
journal::upload::client_cert: ...
journal::upload::server_ca: ...