Commit graph

12 commits

Author SHA1 Message Date
Hangbin Liu
3c679cba58 ipvs: Document sysctl pmtu_disc
Document sysctl pmtu_disc based on commit 3654e61137 ("ipvs: add
pmtu_disc option to disable IP DF for TUN packets").

Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
2017-03-16 13:33:39 +01:00
Hangbin Liu
24b444155b ipvs: Document sysctl sync_ports
Document sysctl sync_ports based on commit f73181c828 ("ipvs: add support
for sync threads").

Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
2017-03-16 13:33:39 +01:00
Hangbin Liu
237e5722bc ipvs: Document sysctl sync_qlen_max and sync_sock_size
Document sysctl sync_qlen_max and sync_sock_size based on
commit 1c003b1580 ("ipvs: wakeup master thread").

Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
2017-03-16 13:33:39 +01:00
Hangbin Liu
a2f346d82b ipvs: fix sync_threshold description and add sync_refresh_period, sync_retries
Fix sync_threshold description which should have two values. Also add
sync_refresh_period and sync_retries based on commit 749c42b620
("ipvs: reduce sync rate with time thresholds").

Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
2017-03-16 13:33:39 +01:00
Alex Gartrell
4e478098ac ipvs: add sysctl to ignore tunneled packets
This is a way to avoid nasty routing loops when multiple ipvs instances can
forward to eachother.

Signed-off-by: Alex Gartrell <agartrell@fb.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
2015-09-17 11:50:02 +09:00
Marcelo Ricardo Leitner
d752c36457 ipvs: allow rescheduling of new connections when port reuse is detected
Currently, when TCP/SCTP port reusing happens, IPVS will find the old
entry and use it for the new one, behaving like a forced persistence.
But if you consider a cluster with a heavy load of small connections,
such reuse will happen often and may lead to a not optimal load
balancing and might prevent a new node from getting a fair load.

This patch introduces a new sysctl, conn_reuse_mode, that allows
controlling how to proceed when port reuse is detected. The default
value will allow rescheduling of new connections only if the old entry
was in TIME_WAIT state for TCP or CLOSED for SCTP.

Signed-off-by: Marcelo Ricardo Leitner <mleitner@redhat.com>
Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2015-02-25 13:46:35 +09:00
Julian Anastasov
4d0c875dcc ipvs: add sync_persist_mode flag
Add sync_persist_mode flag to reduce sync traffic
by syncing only persistent templates.

Signed-off-by: Julian Anastasov <ja@ssi.bg>
Tested-by: Aleksey Chudov <aleksey.chudov@gmail.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
2013-06-26 18:01:46 +09:00
Julian Anastasov
0c12582fbc ipvs: add backup_only flag to avoid loops
Dmitry Akindinov is reporting for a problem where SYNs are looping
between the master and backup server when the backup server is used as
real server in DR mode and has IPVS rules to function as director.

Even when the backup function is enabled we continue to forward
traffic and schedule new connections when the current master is using
the backup server as real server. While this is not a problem for NAT,
for DR and TUN method the backup server can not determine if a request
comes from client or from director.

To avoid such loops add new sysctl flag backup_only. It can be needed
for DR/TUN setups that do not need backup and director function at the
same time. When the backup function is enabled we stop any forwarding
and pass the traffic to the local stack (real server mode). The flag
disables the director function when the backup function is enabled.

For setups that enable backup function for some virtual services and
director function for other virtual services there should be another
more complex solution to support DR/TUN mode, may be to assign
per-virtual service syncid value, so that we can differentiate the
requests.

Reported-by: Dmitry Akindinov <dimak@stalker.com>
Tested-by: German Myzovsky <lawyer@sipnet.ru>
Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
2013-03-19 21:21:51 +09:00
Simon Horman
40cb1f9bc5 ipvs: Enhance grammar used to refer to Kconfig options
Reported-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2011-11-01 09:19:45 +01:00
Simon Horman
325aadc848 ipvs: secure_tcp does provide alternate state timeouts
Also reword the test to make it read more easily (to me)

Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2011-11-01 09:19:41 +01:00
Simon Horman
7e777dd43d ipvs: Add documentation for new sysctl entries
Add missing documentation for conntrack, snat_reroute and sync_version.

Also fix up a typo, IPVS_DEBUG should be IP_VS_DEBUG.

Acked-by: Julian Anastasov <ja@ssi.bg>
Acked-by Hans Schillstrom <hans@schillstrom.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2011-11-01 09:19:25 +01:00
Horms
6ce1669fdb [IPVS]: Add sysctl documentation
* Derived from http://www.linuxvirtualserver.org/docs/sysctl.html, v1.4
  maintained by Wensong Zhang

* Adjusted preample to match ip-sysctl.txt

* Sorted options into alphabetical order

* Added expire_quiescent_template

* Removed timeout_* which are no longer present

* Incoporated doc/debug-levels.txt from IPVS source tree into
  description of ipvs_debug

* Minor spelling fixes

* Further editing more than welcome

Signed-Off-By: Horms <horms@verge.net.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-07-03 19:35:40 -07:00