http://go7cnxivpns4x2trczyaabxwnrz7bwlxjiverkc32o4mjd5npjukpqid.onion/blog/2021-09-30-hosting-one-domain-on-multiple-servers.html
There's a lot to share: config files, SSL certificates or the contents of the website. There are (at least) 2 options: glusterfs and csync2. 1.a. GlusterFS GlusterFS is a network filesystem, where storage servers exports underlying disk storage (regular directories on XFS or EXT4 partitions), replicate data between themselves and provide data to clients through network.