On 04.12.2012 05:41, Kim Zeitler wrote:
Hello,
we are running 2 squid servers on separate gateway machines each with
its own internet connection.
Our clients are given their configuration via WPAD.
Recently we have had some trouble with the main connection and now
would like to implement following scenario:
Both Squid Servers as siblings, if the direct connection of one of
the servers dies, it uses its sibling to provide a response.
I found some older posts here, sadly only 'use direct if parent
dies'.
That is because of the definitions of sibling and parent types. Sibling
is a cache in the same cluster/pool/group which may have a copy of the
object if we don't - they do not normally provide any upstream
connectivity. Parent is a proxy providing connectivity upstream towards
the server where the resources is hosted - they may or not provide
caching.
Siblings are also normally sharing the same upstream connectivity, so
if DIRECT has been tried and failed there is no reason to expect a
sibling to have better connection. Whereas parent is expected to be
useful as an alternative route.
The way to do this is to configure the proxies as _parent_ of each
other, with prefer_direct to make them try DIRECT access first.
If you need to share cache data between them, setup a second linkage of
type sibling for HTCP exchanges to happen on.
Amos
