Hi Lars,
How do I manage firewall/iptables per vserver?
Do I install it on every vserver, og is it possible to install on the host server? What solution is the easiest to maintain?
As ip filtering is done by the kernel, as a vserver does not have a kernel you must do it on the main host. Normally you dont allow your vServers accessing the filtering rules because they can afecct the network of the whole maschine
How do I manage replicating when a MySQL is also running inside a vserver?OUCH - you should NEVER replicate a running mySQL with rsync...MySQL has a built in replication feature that works via network - use this
You cannot replicate MySQL by using rsync, so the vserver has to be "on" to use MySQL internal replication feature.
Normally I setup MySQL on localhost for services on the server that need access to a database.
Is it better to do external MySQL requests to another vserver only running MySQL and then setup a MySQL slave inside a secondary vserver replicating the first MySQL-only vserver?
A replicated MySQL Server can be access read-only, connect to the server as it where external (via IP) or create a hardlink from the vServer to the socket-file (havent tried it out but should work...)
Some like this: Apache vserver <-> MySQL master vserver -> MySQL slave vserver
Is this a good solution, I seem to remember that MySQL requests are slow when going through TCP layer and not a socket (on localhost)?
I think that it is not that mich slower....
Oliver
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