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ChangeLog
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2013-11-10 Alexandre Cassen <acassen@linux-vs.org>
* keepalived-1.2.9 released.
* Alexey Andriyanov fixed inaccuracy in VS_ISEQ macro.
* Alexey Andriyanov fixed hysteresis which could be >= quorum now.
* Alexey Andriyanov extended checker framework so that status_code
and digest can be set together.
* Alexey Andriyanov extended/fixed checker framework for better
SIGHUP support.
* Jonas Johansson fixed VRRP sync group by sending prio 0 when
entering FAULT state. This fix will send prio 0 (VRRP_PRIO_STOP)
when the VRRP router transists from MASTER to FAULT state. This
will make a sync group leave the MASTER state more quickly by
notifying the backup router(s) instead of having them to wait
for time out.
* Jonas Johansson extended VRRP VMAC interface flags (up/down
status) to follow base interface. When using a VMAC interface,
this fix will reflect the base interface flags, i.e. up/down
status, to the VMAC interface. This is useful when using sync
groups (in combination with VMAC) and a link for one of the
members in the MASTER sync group goes down. Before this fix,
this member will not detect the link fault, due to that the
VMAC interface always is UP regardless of the actual status of
the base interface, and the sync group will continue to be
MASTER as if nothing has happend. This fix will however reflect
the status of the base interface onto the VMAC interface, so if
the link goes down the member will transit to FAULT state, which
will make the sync group transit to BACKUP state.
* Jonas Johansson fixed VRRP wrong interface flags corner case.
If a link event arrives between the initial scanning for
interfaces and configuration file parsing, the VRRP instance
will enter an unrecoverable state. This fix will update the
interface flags even when the interface exists, not only for
the inital scan. Note that when all is up and running the link
events will be properly handled by netlink, so this fix only
fixes the special case when a link changes state during
initalization/configuration.
* Jonas Johansson fixed VRRP to honor preempt_delay setting on
startup. If the preempt_delay is set we cannot yet transition
to master state. We must await the timeout of our preempt_delay.
The preemption delay is used when starting up, or rebooting, a
node which needs time to sort out its routing table (e.g., BGP
or OSPF) before it can assume the master role.
* Jonas Johansson extended VRRP code for faster sync group
transition.
* Jonas Johansson replaced popt with getopt. In a embedded
environment you might not want to have to add yet another
library dependency. This commit refactors parse_cmdline() to
use getopt_long() instead och popt.
* EyckWigo proposed to increase defaut socket buf size to handle
env with lot of IP addresses, Default is now set to 64K on netlink
socket.
* Guðmundur Bjarni Ólafsson fixed VRRP unicast code to allow
packet to be routed !
* Guðmundur Bjarni Ólafsson fixed VRRP checksum before computation.
When running in unicast mode with multiple peers, the checksum
was being calculated into itself for consequent peers, causing
incorrect checksums.
* Extended VRRP framework tweaking IPv6 VIP install by disabling
DAD algo and setting deprecated.
Lot of discussions have been made around those 2 topics. First
idea and initial patch where provided by Leo Baltus. This patch
fix the use case where VRRP VIPv6 are used in conjonction of IPVS
healthchecking. If deprecated flag is not set (which is the default
linux behaviour), then VRRP VIP can be used as source address of
healthcheking packet. Since this VIP address is also present, in
most use-cases, on realserver directly so return packets never reach
the healthchecker and hence no realserver was injected in IPVS table.
At the same time, I decided to merge Tore Anderson suggestion of
disabling Duplicate Address Detection algorithm. Tore's arguments
are nice ! Thanks Tore : Using the nodad flag has the following
benefits:
1) The address becomes immediately usable after they're configured.
2) In the case of a temporary layer-2 / split-brain problem we can
avoid that the active VIP transitions into the dadfailed phase
and stays there forever - leaving us without service. HA/VRRP
setups have their own "DAD"-like functionality, so it's not
really needed from the IPv6 stack.
Acknowledgements to Mark Schouten and Frank Baalbergen for pushing
me by testing this features !
2013-09-05 Alexandre Cassen <acassen@linux-vs.org>
* keepalived-1.2.8 released.
* Vincent Bernat fixed issue while pinging master agent.
The agent needs to be initialized to be able to change the
AgentX ping interval.
* Revisited the whole code to use posix declaration style.
* fixed some typos
* Created CLI core framework.
* Ryan O'Hara added option to prevent respawn of child process.
This patch adds a command-line option (--dont-respawn, -R) that
will prevent the child processes from respawning. When this
option is specified, if either the checker or vrrp child
processes exit the parent process will raise the SIGTERM signal
and exit.
* Ryan O'Hara removed duplicate command-line option code.
patch removes unnecessary code to process command-line
options. All options can be processed with a single while loop
that calls poptGetNextOpt. This patch also adds code to check
for errors while processing options. Note that errors encountered
while processing command-line options are fatal.
* Ryan O'Hara add support to usage generation by popt.
This patch uses the popt library to describe the command-line
options and print usage to stderr. This provides a more clear,
concise usage statement.
* Ryan O'Hara and I updated keepalived man page.
* Aleksei Ilin add flexible HTTP checker behaviour for HTTP GET
request's port settings. VirtualServer's port being specified
in HTTP GET request only if `VirtualHost` option is not defined,
otherwise used `VirtualHost` option itself.
* Ryan O'Hara fixed pointer arithmetic for VRRP packet.
When using IPSEC AH authentication, the pointer arithmetic used
to get the location of the VRRP packet is incorrect. The address
of the IPSEC header must be cast as (char *) in order to get
correct address of the VRRP packet. Without this patch,
vrrp_in_chk() will fail to verify incoming VRRP packets when
IPSEC AH is enabled.
* Ryan O'Hara fixed issue while loading SSL certificate.
This patch fixes a problem where keepalived will attempt to
load an SSL keyfile as a certificate, resulting in failure to
initialize SSL context.
* Ryan O'Hara refreshed GPLv2 license with last FSF file.
* junpei-yoshino fixed configure.in. Library crypt is needed.
* Boon Ang fixed comparison of primary IP addresses.
If a router in the master state receives an advertisement
with priority equal to the local priority, it must also
compare the primary IP addresses (RFC 3768, section 6.4.3).
The code to handle this was comparing two IP addresses with
different byte-ordering, resulting in multiple routers in
the master state. This patches resolves the problem by
coverting the local primary IP address to network byte order
for the comparison.
* Henrique Mecking fixed memory leak in libipvs
* Robert James Hernandez fixed RETVAL by setting RETVAL for
status instead keeping RETVAL set to default of 0
* Robert James Hernandez fixed RETVAL by setting RETVAL for
catch all and so that it exits like all other matches in
the case
* Jan Pokorný fixed genhash to ensure CLRF{2} HTML body
separator won't slip.
* Jan Pokorný extended genhash. Generalize the hash algoi
parts, add SHA1.
This patch adds support for hash algo suite extension
with SHA1 being a first one to be available together with
a default MD5. The remaining change on the health-checker
subsystem side is to make analogous modifications and to teach
it to recognize the intended hash algorithm based on the length
of the digest (provided that extra care is taken that no two
algorithms will ever alias in this regard). Also the test
script for genhash was extended to conditionally use SHA1.
* Jan Pokorný cleaned up genhash code.
Access to the hash-specific context was simplified as I've
now checked some C guarantees regarding union/it's members
initial address vs. aligning so now extra inlined accessor
function is needed. This simplified the code a bit.
Also now the hash-specific object is directly pointed to by
SOCK object instead of carrying just the index to the table of
hashes and doing the respective access via a global again and
again. Next, I've concentrated some hash-related declarations
to the new hash.h file. This was mostly motivated by a need to
break the circular include dependency that have arisen. As a
consequence, part of the recent clutter I brought in was removed
again. Most of FEAT_SHA1 conditional compilation is here.
Previously separated table in main carrying the hash IDs to be
printed in the help screen was merged into the table carrying all
the other necessary information about the particular hashes.
* vrrp: Remi Gacogne fixed invalid use of sizeof.
* Pasi Kärkkäinen Add To header for SMTP alerts.
* vrrp: Robert Sander add IPv6 support for virtual_routes and
static_routes.
* Erik de Groot add support to LVS One-Packet Scheduling
(known as OPS). Typically RADIUS traffic comes from a limited
amount of clients and thus you have a very limited range of IP
tuples in action which will never expire. Issue with Keepalived
without this patch is that, although it correctly re-assigns
traffic when a real server dies, it will never re-assign traffic
back to the real server when it is restored. This is because
LVS creates virtual connections, for each IP tuple, that will
never time out as the clients keep sending traffic to the server.
With this patch is is possible to enable OPS for UDP virtual
servers which means LVS does not create virtual connections and
takes a new loadbalancing decision for each UDP packet. The
result is that a restored server now gets RADIUS traffic as
soon as LVS has taken it it back into the server pool.
* Willy Tarreau and Ryan O'Hara add the ability to use VRRP over
unicast. Unicast IP addresses may be specified for each VRRP
instance with the 'unicast_peer' configuration keyword. When
a VRRP instance has one or more unicast IP address defined,
VRRP advertisements will be sent to each of those addresses.
Unicast IP addresses may be either IPv4 or IPv6.
If you are planing to use this option, ensure every ip
addresses present in unicast_peer configuration block do not
belong to the same router/box. Otherwise it will generate
duplicate packet at reception point.
2012-08-29 Alexandre Cassen <acassen@linux-vs.org>
* keepalived-1.2.7 released.
* vrrp: fix issue in while using vrrp_script.
Previous patch introduced by Ryan O'Hara about removing
shadow declaration was kind of too much hunting.
Removing element e in this block simply create inconsitency
in upper list walk. So resurected element declaration with e2.
* snmp: Mikhail Gaydamaka extended MIB and both vrrp and check
frameworkds to support routerId to var bind.
* snmp: Mikhail Gaydamaka fixed oid for vrrpSyncGroupStateChange
var bind.
* some cosmetics again and again.
2012-08-20 Alexandre Cassen <acassen@linux-vs.org>
* keepalived-1.2.6 released.
* Rename global config data variable 'global_data'.
From Ryan O'Hara :
This patch renames the global configuration data
variable from 'data' to 'global_data'. Three reasons for
renaming this varibale:
- Fixes shadow declaration of 'data' in several locations.
- Is more consistent with other global data variables
(ie. vrrp_data, check_data).
- Functions like free_global_data and dump_global_data were
ignoring conf_data_t argument and using global variable
instead.
* Ryan O'Hara: Fix shadow declaration of 'vrrp_data' variable.
* Ryan O'Hara: Fix shadow declaration of 'check_data' variable.
* Ryan O'Hara: Remove shadow declaration of 'element e' in
vrrp_init_state.
* check: Avoid the use of kernel defines in libipvs userland
prototypes.
* vrrp: Correctly handle macvlan interface when config file is
re-loaded. From Bob Gilligan :
Testing with the 1.2.0 branch, bring keepalived up with a
vrrp_instance that is configured with use_vmac. Then delete
that vrrp_instance from the config file. Then tell keepalived
to re-read its config file with SIGHUP. The vrrp_instance will
be stopped, but the macvlan interface will remain. The obvious
fix would be to add code to call netlink_link_del_vmac() in
clear_diff_vrrp(). There's one problem with that: the code
needs the ifindex of the macvlan interface to delete it, but
that resides in the interface structure that was freed earlier
in the reload process. My fix is to add a field to the
vrrp_rt struct to remember the macvlan ifindex. This patch
addresses this problem plus two others that can occur in
reloading the config file: 1) If the vrrp_instance
configuration is kept, but the use_vmac entry is removed, the
macvlan interface will not be deleted; 2) If a vrrp_instance
with use_vmac is left unchanged, the code will attempt to
re-create the macvlan interface, but this will fail and the
program will end up not using the macvlan interface.
* vrrp: VRRP should notify other routers before it does any
action that effects traffic flow. From John Southworth:
Move the shutdown_vrrp_instances code to before the deletion
of sock_pool. Move sending priority 0 adverts to before address
removal occurs
* vrrp: From John Southworth: Stop timers before shutting down
vrrp instances. This is to avoid a possible condition where
a priority 0 advertisement is sent and before the master
thread is killed another advertisement can be generated and sent.
* vrrp: Change when socket fd's are freed.
From John Southworth:
Priority 0 advertisements were not being sent as desired on
config reload. This was causing long delays on manually failed
over instances. The socket pool was being freed too early, as a
result the file descriptor for the socket was no longer valid at
the time the priority 0 advertisment was attempted.
* vrrp: Added a separate timeout parameter for vrrp_script checks
From Jonathan Harden:
I've added a timeout parameter to the vrrp check scripts which
allow you to have the check timeout different to the interval.
When no timeout has been specified the interval is used (which
mimics the current behaviour). To explain the reasoning: We
wanted to have check scripts time out faster than our check
interval. Doing the check we need to perform is a little load
intensive and so we don't want to perform it every few seconds.
With this patch we set an interval of 60 seconds but a timeout
of 5 seconds (if the check takes more than a few seconds then
the service is not working correctly).
* Extended vector lib for futur work
* some cosmetics.
2012-08-13 Alexandre Cassen <acassen@linux-vs.org>
* keepalived-1.2.5 released.
* Merge SNMP support from Vincent Bernat.
* SNMP is not compiled nor activated by default.
* Updated autoconf script
* Created Keepalived MIB
* Integration of NetSNMP into main scheduling loop
* vrrp: Most internal data can be queried with SNMP.
* check: Most internal values can be queried using SNMP.
The main exception is the ability to query checkers
which is not present.
* check: SNMP support for IPVS stats. IPVS stats are
exported with SNMP. A cache is used to avoid to query
the kernel too much.
* Created core framework for SNMP trap
* vrrp: SNMP traps are sent when instance state changes
and when sync group state changes
* check: SNMP traprs are sent when real server state changes
and when virtual server quorum state changes
* vrrp: add support to write/update operations from SNMP.
Write/update support is available for changing the base priority
and for changing instance preemption.
* check: add support to write/update operations from SNMP.
Write support is available for changing the weight of a real
server.
* workaround for AgentX ping blocking Keepalived. When establishing
AgentX session with the master agent, we setup low timeout and
retries values. If the master agent is blocked, we will wait for
less than 1 second for them and therefore, there will be no
disruption for VRRP.
* Copyright update
* some cosmetics.
2012-07-27 Alexandre Cassen <acassen@linux-vs.org>
* keepalived-1.2.4 released.
* Please look at git repo for credits.
* remove CR from manpage
* check: fix pid display in syslog messages
* vrrp: better documentation of the limitation on password
length
* cosmetics to be pleasant with GCC4
* Update autoconf script to properly detect VRRP VMAC
support
* security: Fix exploitable issue in sighandler !
* Add datarootdir to Makefile.in files.
* Fix logging to console.
* Remove newlines from log_message calls.
2012-07-13 Alexandre Cassen <acassen@linux-vs.org>
* keepalived-1.2.3 released.
* Please look at git repo for credits.
* VRRP : allow group to use priority with 'global_tracking'
group keyword
* VRRP : Adjust TOS values. The TOS value used by other
vendors is ip precedence 6, so change that. Use socket
priority option to force packets into band 0 of pfifo_fast.
* VRRP : Fix sync-group thrashing.The sync group implementation
was not very robust. If one synced instance lost communication
without going to fault state then all synced intances would
transition to master. Following this all instances would
transition back to backup because they heard higher priority
advertisements. This thrashing would continue indefinitely.
To fix this the sync-group code was made to prefer backup state.
That is, the sync-groups don't sync to master state unless
every instance wants to be master.
* VRRP : Fix dst lladdr in IPv6 Unsollicited NA.
* VRRP : fix pid display in syslog messages.
* Fix configure script to correctly identify kernel version.
* check : handle unspecified sockaddr_storage when comparing
* VRRP : ensure VRRP script interval and GARP delay is not 0.
* check: ensure non 0 default values for timeouts.
* VRRP : Fix priority not changing on reload.
* check : Fix IPv4 address comparison routine.
* Don't use bind() with AF_UNSPEC.
* check : enable the use of fwmark with IPv6 virtual servers.
* Fix modprobe arguments.
* Fix double ntohs() in SMTP checker.
* Pretty-print IP:port as [%s]:%d.
* check : keep retry in case of early TCP failures in checks.
* when specifying an IPv6 range, range is hexadecimal value.
* Only define kernel types for ip_vs.h header to avoid problems
when loading other headers.
* When respawning VRRP or check process, use LOG_ALERT.
* Do not set reload flag in the main process.
* Set correct rights on PID file.
* fix 'gratuitous' typos.
* ipvs: don't include linux/types.h or asm/types.h.
* configure: check for nl_socket_modify_cb for libnl.
* configure: don't check for IPVS support with kernel 2.6.x.
* VRRP : On shutdown, release sockets later to be able to send
shutdown packet.
* fix documentation on linkbeat_use_polling keyword.
* Fix a typo for healthchecker.
* fix syslog message if bogous vrrp packet (wrong auth type)
received.
* manpage update.
2011-01-09 Alexandre Cassen <acassen@linux-vs.org>
* keepalived-1.2.2 released.
* IPv6 : extended autoconf script to support libnl detection.
IPv6 IPVS kernel subsystem is reachable through
generic netlink configuration interface.
* IPv6 : Enhanced libipvs-2.6 to support generic netlink
configuration interface. If generic netlink is
available with kernel then it will be the
prefered path to configure IPVS.
* IPv6 : Enhanced the whole checker API to use
sockaddr_storage.
* IPv6 : Enhanced the whole core framework to use
sockaddr_storage.
* IPv6 : Enhanced all checkers to use sockaddr_storage.
* fixed a long time pending issue in all checkers. If
first connection attempt to remote peer was failing
no more check was performed to service... Up on error
connecting remote peer simply register a new timer for
next check. This is specially needed in IPv6 context
where a unreachable host can be reached at delayed time.
* code clean-up: revisited the code to use more POSIX
compliant declaration. thread typedef to use thread_t
instead. revisisted checker framework to use POSIX typdef
declaration.
2010-12-08 Alexandre Cassen <acassen@linux-vs.org>
* keepalived-1.2.1 released.
* Vincent Bernat <bernat <at> luffy.cx>:
VRRP: Fix incorrect computation for packet size
* Vincent Bernat <bernat <at> luffy.cx>:
VRRP: handle passwords up to 8 characters
* Vincent Bernat <bernat <at> luffy.cx>:
When updating weight, check quorum state.
MISC check can update the weight of a real server. This
can lead to a change in quorum state.
We factor out quorum handling from perform_svr_state()
into a new function update_quorum_state() that will check if
the quorum state changed and if yes, update sorry server status,
exec quorum commands and add back or remove alive real servers
(with existing function perform_quorum_state()).
This patch is mostly cut'n'paste and adding a call to
update_quorum_state() in update_svr_wgt(). We also make
perform_svr_state() and update_quorum_state() almost symmetric.
* Vincent Bernat <bernat <at> luffy.cx>:
Fix an infinite loop in master transition with sync groups.
This patch is from Arjan Filius. See:
http://marc.info/?l=keepalived-devel&m=128212278218825&w=2
When transitioning to master state, keepalived might try to
force transition to master state of other VRRP instances into
the same group before their transition is complete. This leads
to an infinite loop with huge VRRP trafic.
* Vincent Bernat <bernat <at> luffy.cx>:
VRRP : Use VRRP_PRIO_DFL instead of 100 for default priority.
* Vincent Bernat <bernat <at> luffy.cx>:
Use netpacket/packet.h instead of linux/if_packet.h to get
sockaddr_ll.
linux/if_packet.h pulls linux/types.h that should not be used
by a userland program since types defined here can conflict
with stdint.h. We use netpacket/packet.h which is a GNU LibC
header.
* Vincent Bernat <bernat <at> luffy.cx>:
Keep current weight on reload when initial weight is not
altered.
Weight can be changed by MISC_CHECK when using dynamic option.
In case of reload, the change is lost until the script runs
again. We record the initial weight in a separate variable and
use it to check if a real server has changed instead of using
the actual weight.
* Vincent Bernat <bernat <at> luffy.cx>:
VRRP : disabled scripts and initially good scripts should be
considered as OK.
When a script is not weighted, its failure will lead to a
failure of the associated VRRP instance. However, disabled
script and scripts that are initially good (after a reload)
should be considered as successful and not make the instance
fail. Moreover, a disabled script should not be used when
computing script weights.
* Vincent Bernat <bernat <at> luffy.cx>:
VRRP : more informative message when disabling a script due
to use of weights.
When using a weight for a tracked script, the script is
disabled. However, the warning message said that the weight
was ignored. We change the message to tell that the script is
ignored. Moreover, we don't change its weight since it can be
used in another instance, not in a SYNC group.
* Vincent Bernat <bernat <at> luffy.cx>:
check : include missing virtual server group name in a log
message
* Vincent Bernat <bernat <at> luffy.cx>:
configure: add a check for ETHERTYPE_IPV6.
ETHERTYPE_IPV6 defined in net/ethernet.h is pretty recent.
If absent, we hard-code the value into CFLAGS. This patch
requires regeneration of configure.
* Vincent Bernat <bernat <at> luffy.cx>:
check : update server weight in IPVS only if server is alive
and in the pool.
With inhibit_on_failure, a server can be in the pool and not
alive. We don't want to set the weight of an inhibited server
or a server in a virtual server whose qorum is not met yet.
* Vincent Bernat <bernat <at> luffy.cx>:
check: really add back inhibited server when quorum is gained
A previous change contained an erroneous check to add back
alive servers when quorum state was gained. This check was
incompatible with inhibit_on_failure. When servers were added
back in the pool, the weight was not updated accordingly.
* Vincent Bernat <bernat <at> luffy.cx>:
check : update server weight despite quorum when no sorry
server.
In absence of a sorry server, the logic is to not use quorum
except to run commands when quorum is gained or lost. This
means that if a MISC check modifies the weight of a server
and there is no sorry server, we do not consider quorum.
2010-05-31 Alexandre Cassen <acassen@linux-vs.org>
* Branch 1.2.0 created. This branch will host all new
developments on Keepalived. New code will be added
in here only.
* VRRP : Add support to IPv6 protocol. The global framework
has been extended to support this branch new family !
* VRRP : Implement IPv6 Neighbour Discovery protocol (NDISC).
In IPv6 gratuitous ARP doesnt exist since ARP is IPv4 only.
NDISC can provide the same feature by sending so called
Unsolicited Neighbour Advertisement. A node can send such a
protocol datagram in order to (unreliable) propagate new
information quickly (rfc4861.4.4). NDISC build an ICMPv6
message with taget link-layer address option, this option is
set icmp6_override flag to indicate that advertisement should
override an existing cache entry and update the cached
link-layer.
* VRRP : Extend ip address framework to be IPv4 and IPv6
independant. An ip address, as defined in framework, is
now {IPv4,broadcast} or {IPv6}. Use struct ifaddrmsg to
store and prepare netlink related operation. This clean-
-up the code.
* VRRP : Extend parser to support IPv6 declarations. IPv6
and IPv4 addresses can be configured inside the same
configuration block (eg: virtual_ipaddress or
virtual_ipaddress_excluded). An instance can run IPv4 and
IPv6 addresses at a time, this can be useful in dual-stack
env (since this will become certainly the most common use
case in the next years).
* VRRP : Extend netlink framwork to support IPv6 addresses
interactions (reflection/addition/deletion).
* VRRP : Extend finite state machine support IPv4 & IPv6
at a time.
* VRRP : Extend protocol helpers to support IPv6 multicast
related. AF_INET6 SOCK_RAW tweaking it done through
socket API instead of PF_PACKET header building... This
makes code cleaner.
* VRRP : Set default VRRP instance protocol to be IPv4.
you can use configuration keyword "native_ipv6" inside
vrrp_instance configuration block to specify that you
want to use IPv6 for VRRP multicasting protocol instead.
* VRRP : Extend socket option related helpers to support
IPv6 specifics.
* VRRP : Extend protocol scheduler and dispatcher to
support IPv6.
* VRRP : Extend socket pool to keep track of socket
family.
* VRRP : Cleanup protocol offset pointer by removing
duplication code...
* VRRP : some code clean-up...
2010-05-06 Alexandre Cassen <acassen@linux-vs.org>
* keepalived-1.1.20 released.
* Vincent Bernat <bernat <at> luffy.cx> extended ip/route
framework to be able to add route or ip address if they
already exist.
* Vincent Bernat <bernat <at> luffy.cx> fixed broadcast
address display.
* Vincent Bernat <bernat <at> luffy.cx> extended genhash to
display an error when giving an incorrect IP address.
* Vincent Bernat <bernat <at> luffy.cx>: When parsing
"blackhole" route, also parse IP mask.
* Vincent Bernat <bernat <at> luffy.cx>:
On reload, destroy signal pipes before recreating them.
* Vincent Bernat <bernat <at> luffy.cx>:
Fix SMTP checker adding himself repeatedly in the list of
failed checkers.
* Vincent Bernat <bernat <at> luffy.cx>:
Handle non-existant default interface in VIP definition.
* Vincent Bernat <bernat <at> luffy.cx>:
Remove alive real servers when quorum is lost.
* Vincent Bernat <bernat <at> luffy.cx>:
Fix a segfault when a virtual_server is empty.
* Vincent Bernat <bernat <at> luffy.cx>:
Add real servers to new member of a virtual server group
on reload.
* Vincent Bernat <bernat <at> luffy.cx>:
Keep previous effective VRRP priority on reload.
* Vincent Bernat <bernat <at> luffy.cx>:
Fix VRRP script not running any more after reload.
* Vincent Bernat <bernat <at> luffy.cx>:
On reload, keep status for all VRRP scripts.
* Removed IPVS Kernel 2.2 support
2009-10-01 Alexandre Cassen <acassen@linux-vs.org>
* keepalived-1.1.19 released.
* Cosmetics changes.
* Vincent Bernat <bernat <at> luffy.cx> fix a segfault
when there is no real server for a virtual server.
* Vincent Bernat <bernat <at> luffy.cx>, Willy Tarreau
and I finally fixed SIGCHLD handling upon reload.
* Vincent Bernat <bernat <at> luffy.cx> fix VS_ISEQ macro.
* VRRP : Kimitoshi Takahashi <ktaka <at> clustcom.com>
fixed nopreempt from FAULT state. The owner of higher
priority in FAULT state shouldn't preempt current MASTER
when it's recovering, if the nopreempt option is set.
2009-09-24 Alexandre Cassen <acassen@linux-vs.org>
* keepalived-1.1.18 released.
* Fixed compilation warnings
* Updated autoconf kernel version detection. Created a new
configuration option to force kernel versioni selection.
This option can be useful for crosscompilation:
--with-kernel-version={2.2|2.4|2.6}
* Updated media link failure detection strategy. Kernel
linkwatch has been around for long time so set it as
default strategy. Alternatively you can choose to use
MII BSMR polling strategy by adding new keyword
'linkbeat_use_polling' in your configuration file.
* Vincent Bernat <bernat <at> luffy.cx> fixed ip_vs.h includes.
* Removed vrrp_running and check_running test since it is
already performed by keepalived_running.
* Properly handle father pidfile handling.
* fixed reload handler to properly print out PID.
* Willy and I fixed a signal handling issue while reloading
daemon. A dereferencing master thread issue leading to a
segfault, so that reload was seen as a restart because it
was respawned by keepalived father process.
* Willy fixed a missing UNSET_RELOAD declaration leading to
a potential infinite loop while performing reload.
* Vincent Bernat <bernat <at> luffy.cx> fixed initial value
of quorum state on startup and reload. Fixed sorry server
removal to consider quorum state.
* VRRP : Add missing notify calls while entering FAULT state.
* VRRP : Willy added support to delayed script check launch
(up and down). It defines "rise" and "fall" keywords. "fall"
defines the required number of failures to switch in KO mode,
"rise" defines the number of sucesses to switch in OK mode.
* VRRP : Fixed an IP_DROP_MEMBERSHIP issue while performing
reload. vrrp socket pool is released at first.
2009-03-05 Alexandre Cassen <acassen@linux-vs.org>
* keepalived-1.1.17 released.
* Fixed low-level scheduler timer computation to take care to
monothonic computation. Select returns if timer is null!
* VRRP : Fixed vrrp script initialization to use event thread
instead of timer thread so that script no longer need to
wait until first polling timer fired.
* VRRP : Willy and I fixed MII media link failure detection
to test SIOCGMIIREG call before fetching BMSR.
* VRRP : Resurected VRRP_STATE_GOTO_FAULT. This state is
really needed to speed-up convergence and prevent against
any issue while using vrrp_sync_group.
2009-02-15 Alexandre Cassen <acassen@linux-vs.org>
* keepalived-1.1.16 released.
* Code clean-up.
* Stefan Rompf, <stefan@loplof.de> extended scheduler to
synchronize signal handling by sending the signal number through
a self pipe, making signals select()able. Child reaping has been
moved to a simple signal synchronous signal handler. Signal
shutdown handling has been centralized.
* Denis Ovsienko, <pilot@etcnet.org> extended healthchecker
framework to support alpha/omega design. It provides virtual
service control in a more fine-graned maner. You may have a
look to the SYNOPSIS file to have full picture on configation.
It addresses the following issues :
- A virtual service is considered up even with an empty RS pool.
- There is no reliable mean to avoid service regression, when
the server pool becomes too small.
- There is no mean to escalate any of the above fault/recovery
events.
- Real servers are assumed alive initially. This leads to
unnecessary state flap on keepalived start.
- notify_down isn't executed for working real servers on
keepalived shutdown.
- There is no reliable mean to handle keepalived stop to move
the virtual service over another load balancer.
* Stephan Mayr, <Mayr.Stefan@swm.de> fixed default value for
checker loop... a missing TIMER_HZ.
* Merge keepalived.init.suse.
* Robin Garner, <robin.garner@scu.edu.au> added support to
--log-console facility.
* Tobias Klausmann, <klausman@schwarzvogel.de> fixed an openfile
leak while performing reload.
* Leo Baltus, <Leo.Baltus@omroep.nl> extended pidfile handling
to allow keepalived to start using configurated pidfile.
* VRRP : Siim Poder, <siim@p6drad-teel.net> fixed IPSEC AH auth
to skip IPv4 id field of zero. If zeroed kernel will fill it
and lead to an unwanted protocol re-election.
* VRRP : Siim Poder, <siim@p6drad-teel.net> fixed reloading issue.
New ip addresses are added (from configuration). State is kept
instead of starting from whatever is in configuration file.
If prios are changed in such a way, state change can occur after
reload.
* VRRP : Vincent Bernat, <bernat@luffy.cx> extended virtual_route
to support virtual "black hole" route as well as multihop route.
* VRRP : Stig Thormodsrud, <stig@vyatta.com> fixed a crash while
using virtual_router_id set to 255.
* VRRP: Jon DeVree, <jadevree@arbor.net> fixed arp handling to
to initialize the target hardware address, using 0xff as found
in arping. Let scripts work without dealing with weight, if the
script fails, VRRP fails.
* VRRP : Pierre-Yves Ritschard, <pierre-yves@spootnik.org> removed
the GOTO_FAULT state from FSM.
* VRRP : Willy Tarreau, <w@1wt.eu> fixed link detection handling
to support right ioctl values for recent kernel ! It can lead
to issue while running instance on a bonding interface.
* VRRP : Willy Tarreau, <w@1wt.eu> extended scheduler to catch
time drift. It implements an internal monotonic clock. It
maintains an offset between sysclock and monotonic clock, if
computed time if anterior to monotonic time then just update
offset. If time computed if fare away into the future then
limit delay and recompute offset.
* VRRP : Willy Tarreau, <w@1wt.eu> fixed autoconf issues.
2007-09-15 Alexandre Cassen <acassen@linux-vs.org>
* keepalived-1.1.15 released.
* Matthias Saou, <matthias at rpmforge.net> fixed genhash
Makefile for man page installation.
* Casey Zacek, <keepalived at bogleg.org> provided a patch
to check_http to remove buffer minimization while processing
stream. It appears some webserver cause healthchecker crash.
* Chris Marchesi, <chris.marchesi at canadawebhosting.com> provided
a patch for better handling of SSL handshake errors.
* Shinji Tanaka, <stanaka at hatena.ne.jp> fixed parser "include"
directive to support declaration inside configuration directives,
like including file inside vrrp_instance declaration.
* Andreas Kotes, <count at flatline.de> fixed HTTP healthchecker
while handling MD5SUM result. It appears checker never removed
realserver on MD5SUM mismatch !!! whats that crap.
* VRRP : Willy Tarreau, <w at 1wt.eu> fixed a missing notifications
upon transition from fault to backup.
* VRRP : Add support to route metric in virtual_routes definition.
2007-09-13 Alexandre Cassen <acassen@linux-vs.org>
* keepalived-1.1.14 released.
* Shinji Tanaka, <stanaka at hatena.ne.jp> extended parsing
framework to support "include" directives. For more
informations and documentation please refer to Shinji
website :
http://misccs.dyndns.org/index.php?keepalived%20include%20patch
* Tobias Klausmann, <klausman at schwarzvogel.de> add error loggin
while parsing configuration file.
* Merged patches from rpmforge.net on Makefile and redhat specfile.
* Create a goodies directory to store nice scripts received from
users. Add Steve Milton (milton AT isomedia.com) arpreset script
to delete a single ARP entry from a CISCO router.
* VRRP : David Woodhouse, <dwmw2 at redhat.com> fixed vrrp_arp
includes.
* VRRP : Pierre-Yves Ritschard, <pyr at spootnik.org> fixed negative
weights in script.
* VRRP : Michael Smith, <msmith at cbnco.com> extended
virtual_ipaddress setting to support Old-style Linux interface
aliases like eth0:1.
* VRRP : Ward Wouts, <ward.wouts at gmail.com> add support to
vrrp_script logging.
2006-10-11 Alexandre Cassen <acassen@linux-vs.org>
* keepalived-1.1.13 released.
* VRRP : Added a new notify script to be launch during vrrp
instances shutdown. This new notify hook is configured
using notify_stop keyword inside vrrp_instance block.
* VRRP : Willy Tarreau <w at 1wt.eu> fixed an errno issue in
thread_fetch(), errno is lost during set_time_now(). This
patch saves it across the call to set_time_now() in order
to get the valid error.
* VRRP : Willy Tarreau <w at 1wt.eu> extended timer framework
to save errno in timer_now() and set_time_now() just in
case other functions do not expect these functions to modify
it. This is a safer approach than the initial patch to
thread_fetch(), while still compatible.
* VRRP : Willy Tarreau <w at 1wt.eu> fixed an FSM silent issue.
By default, the VRRP daemon stops sending during new MASTER
elections. This causes 3 to 4 seconds of silence depending on
the local priority, and sometimes causes flapping when the
differences in priorities are very low, due to the kernel timer's
resolution : sometimes, the old master receives a first
advertisement, enters backup, waits 3 seconds, sees nothing and
finally becomes master again, which forces a new reelection on
the other one.
* VRRP : Willy Tarreau <w at 1wt.eu> extended VRRP framework to
support floating priority. Replace the priority in each
vrrp_instance with a base priority and an effective priority,
to prepare the support for floating priorities. The configuration
sets the base_priority, and all comparisons use the new
effective_priority value. This one is computed in the
vrrp_update_priority() thread by adding an offset to base_priority,
based on the result of various checks.
* VRRP : Willy Tarreau <w at 1wt.eu> extended notify script to add
the priority in "$4" when calling a notify script. This is
important in labs and datacenters when systems can display the
priority on a front LCD, because it allows workers to carefully
operate without causing unexpected reelections.
* VRRP : Willy Tarreau <w at 1wt.eu> extended interface tracking
framework to let interface tracking change the priority by adding
a "weight" parameter. If the weight is positive, it will be added
to the priority when the interface is UP. If the weight is negative,
it will be subtracted from the priority when the interface is down.
If the weight is zero (default), a down interface will switch the
instance to the FAULT state.
* VRRP : Willy Tarreau <w at 1wt.eu> added a new "vrrp_script" section
to monitor local processes or do any type of local processing to
decide whether the machine is in good enough health to be elected
as master. A same script will be run once for all instances which
monitor it. If no instance use it, it will not be run, so that it's
safe to declare a lot of useful scripts. A weight is associated to
the script result. If the weight is positive, it will be added to
the priority when the result is OK (exit 0). If the weight is
negative, it will be subtracted from the priority when the result
is KO (exit != 0). If the weight is zero, the script will not be
monitored. The default value is 2.
* VRRP : Willy Tarreau <w at 1wt.eu> extended vrrp scheduler so that
when a VRRP is part of a SYNC group, it must not use floating
priorities, otherwise this may lead to infinite re-election after
every advertisement because some VRRPs will announce higher prios
than the peer, while others will announce lower prios. The solution
is to set all weights to 0 to enable standard interface tracking,
and to disable the update prio thread if VRRP SYNC is enabled on a
VRRP.
* VRRP : Willy Tarreau <w at 1wt.eu> added some documentation and
examples for the brand new VRRP tracking mechanisms.
* VRRP : Ranko Zivojnovic, <ranko at spidernet.net> fixed vrrp
scheduler to execute notify* scripts in transition from the
failed state to the backup state.
* Nick Couchman, <nick.couchman at seakr.com>, added support for
real server upper and lower thresholds. This allows you to set
a minimum and maximum number of connections to each real server
using the "uthreshold" (maximum) and "lthreshold" (minimum)
options in the real_server section of the configuration file.
* Chris Caputo, <ccaputo at alt.net> extended autoconf script
to support recent move of UTS_RELEASE from linux/version.h to
linux/utsrelease.h.
* Chris Caputo, <ccaputo at alt.net> extended ipvswrapper 2.4
code to support misc_dynamic weight.
2006-03-09 Alexandre Cassen <acassen@linux-vs.org>
* keepalived-1.1.12 released.
* VRRP : Christophe Varoqui, <Christophe.Varoqui@free.fr> extended
VRRP framework to use virtual_router_id as syncid in LVS mcast
datagram while using LVS syncd in VRRP instance.
* Kevin Lindsay, <kevinl@netnation.com> and Christophe Varoqui,
<Christophe.Varoqui@free.fr> fixed SSL checker to properly
use openssl when dealing with asynchronous stream handling.
Kevin fixed asynchronous handling during connection stage
while Christophe fixed stream handling after connection stage.
* Kjetil Torgrim Homme, <kjetilho@ifi.uio.no> extended keepalived
spec file to cleanly compile on RedHat enterprise 3 and 4.
* Heinz Knutzen, <Heinz.Knutzen@dataport.de> fixed SMTP checker
to overwrite default_host while parsing configuration file.
A SMTP_CHECK without a "host" section should use the ip of the
current real server as default.
2005-03-01 Alexandre Cassen <acassen@linux-vs.org>
* keepalived-1.1.11 released.
* Asier Llano Palacios, <a.llano@usyscom.com> extended
autoconf script to support cross-compilation.
* Kevin Lindsay, <kevinl@netnation.com> and I fixed a
missing bitwise negation while removing signal from
global signal mask. Set this operation before handler
is called. This assume that bitwise negation is an
atomic code generated from compiler. Since gcc 3.3
this is true.
* VRRP : extended ipaddress and iproutes code to return
if vip or vroutes is referencing an unknown interface.
2005-02-15 Alexandre Cassen <acassen@linux-vs.org>
* keepalived-1.1.10 released.
* VRRP : While restoring interface, release iproutes
before ipaddresses. Routing daemons needs that order
for netlink reflection channel.
* VRRP : Bin Guo, <bguo@bluesocket.com> fixed a memory
leak while calling script_open.
* Kevin Lindsay, <kevinl@netnation.com> fixed some buffer
overruns, NULL pointer and dangling pointer references.
* Kevin Lindsay, <kevinl@netnation.com> redisigned signal
handling. When a signal occurs, a global signal_mask is
modified. In the main loop there is a checked to see if
the signal_mask has any pending signals. The appropriate
signal handler is then run at this time. This is to prevent
races when modifying linked lists.
* Kevin Lindsay, <kevinl@netnation.com> fixed shadowed
declarations.
* Christophe Varoqui, <Christophe.Varoqui@free.fr> and I
Extended libipvs-2.6 to support syncd zombies handling.
Since ip_vs_sync.c kernel code no longer handle waitpid()
we fork a child before any ipvs syncd operation in order
to workaround zombies generation.
* John Ferlito, <johnf@inodes.org> and I Fixed a scheduling
race condition while working with low timers.
* Updated check_http and check_ssl to use non-blocking
socket.
* Fixed some race conditions while reloading configuration.
Prevent against list gardening if list is empty !
* Fixed recursive configuration parsing function to be clean
with stack. Only one recursion level.
* Some cosmetics cleanup in Makefiles.
2005-02-07 Alexandre Cassen <acassen@linux-vs.org>
* keepalived-1.1.9 released.
* VRRP : Chris Caputo, <ccaputo@alt.net> updated keepalived manpage
for nopreempt and preempt_delay.
* VRRP : Fixed an issue while releasing vrrp socket pool... Just
release pool one time !
* VRRP : Fixed netlink framework to properly save netlink socket flags
while setting blocking flags.
* VRRP : Fixed a regression introduced with previous release while
hashing vrrp fd bucket into fd hash index.
* Patrick Boutilier, <boutilpj@ednet.ns.ca> fixed an issue in the
extract_html function. Read the full html header.
* Chris Caputo, <ccaputo@alt.net> and I fixed compilation issue
while using --enable-debug configuration option.
* Extended both VRRP and Healthchecker framework to support
debugging flags.
* Removed the watchdog framework. Since scheduling framework
support child, we register a child thread for both process
VRRP & Healthcheck. When child die or stop prematuraly this
launch scheduling callback previously registered. Watchdog
is now handled by signaling.
(credit goes to Kevin Lindsay, <kevinl@netnation.com> for nice
idea).
* Some cosmetics cleanup.
2005-01-25 Alexandre Cassen <acassen@linux-vs.org>
* keepalived-1.1.8 released.
* VRRP : Chris Caputo, <ccaputo@alt.net> added "dont_track_primary"
vrrp_instance keyword which tells keepalived to ignore VRRP
interface faults. Can be useful on setup where two routers
are connected directly to each other on the interface used
for VRRP. Without this feature the link down caused
by one router crashing would also inspire the other router to lose
(or not gain) MASTER state, since it was also tracking link status.
* VRRP : Chris Caputo, <ccaputo@alt.net> added "nopreempt" which
overrides the VRRP RFC preemption default. This replaces the
"preempt" keyword which was not fully implemented. "preempt" is
kept around for backward compatibility but is deprecated.
* VRRP : Chris Caputo, <ccaputo@alt.net> added "preempt_delay" which
allows one to specify number of seconds after startup until VRRP
preemption. (range 0 to 1,000 seconds) this is useful because
sometimes when a machine recovers it takes a while for it to become
usable, such as when it is a router and BGP sessions need to come
back up.
* Chris Caputo, <ccaputo@alt.net> made it so there is a useful "Date:"
in SMTP alert emails.
* VRRP : Chris Caputo, <ccaputo@alt.net>. In debug output log
gratuitous ARPs with actual IP addresses being ARPed.
* VRRP : Chris Caputo, <ccaputo@alt.net>. If started with
"--dont-release-vrrp" then try to remove addresses even if we didn't
add them during the current run, when it makes sense to do so.
* VRRP : Chris Caputo, <ccaputo@alt.net> added a missing
free_vrrp_buffer() during VRRP stop.
* VRRP : Kees Bos, <k.bos@zx.nl> fixed VRRP sanity check to perform
checksum computation over incoming packet and not local router
instance memory representation => Better to log 'invalid vip
count' instead of 'Invalid vrrp checksum' when the number of
configured vips differ in the master and backup server :)
* VRRP : Release socket pool during daemon stop and reload
* VRRP : Refresh socket pool during reload
* VRRP : Extended netlink framework to support blocking
operation. During initialization, set blocking netlink channel
to wait responses from kernel while parsing result. Kernel netlink
reflection are still handled using non-blocking.
* Jeremy Rumpf, <rumpf.6@osu.edu> added SMTP checker. It take
a special care of smtp server return code.
* Merged genhash man page
* Chris Caputo, <ccaputo@alt.net> added "misc_dynamic" to a
MISC_CHECK which makes it so a script can adjust the weight of
a real server.
* Fixed some assertion issue in memory framework.
* Use router_id instead of lvs_id in the global_def configuration
block (lvs_id kept for backward compatibility).
* Ronald Wahl <rwa@peppercon.com>, fixed declarations to be only
in includes files.
* Ronald Wahl <rwa@peppercon.com>, moved the definition of variables
to C files
* Ronald Wahl <rwa@peppercon.com> and I fixed scanning for header/body
separator in HTTP protocol
* Ronald Wahl <rwa@peppercon.com> replaced memcpy by memmove where source
& destination may overlap
* Extended checker API to only register checkers when checker callback
is defined.
* Jacob Rief, <jacob.rief@tiscover.com> fixed openlog to take care
of configured log facility.
* Move in_csum to util file.
* Extended libraries to support some new facilities (list and vector).
* Extended scheduler I/O to use timer decalred on the stack.
* Some cosmetics changes.
2004-04-05 Alexandre Cassen <acassen@linux-vs.org>
* keepalived-1.1.7 released.
* Jacob Rief, <jacob.rief@tiscover.com> added target tarball into
root Makefile to facilitate packaging (rpm & tarball).
* Jacob Rief, <jacob.rief@tiscover.com> and I unified version
handling. Now only the root file VERSION is used by configure
to add VERSION_STRING via config.h.in. Added VERSION_DATE
included into the VERSION_STRING that reflect the building
date into the version banner.
* Andres Salomon, <dilinger@voxel.net> wrote the genhash manpage.
* VRRP : Added ipvs_start() and ipvs_stop() calls during vrrp child
start and stop stage.
* Added some assertion test in memory framework to not allocate
bucket if no more place. This option is only used if compiled
with debug flags.
* Some cosmetics patch in Makefiles and autoconf script.
2004-02-23 Alexandre Cassen <acassen@linux-vs.org>
* keepalived-1.1.6 released.
* VRRP : Fixed scheduling timer update. Global scheduling timer is
updated before each thread registering and after scheduling I/O MUX.
Since is needed to take care of scheduling jitter introduced by
overhead (VRRP is using low low timer so more sensitive to overhead).
Thanks to Nathan Neulinger, <nneul@umr.edu> for his quick feedback
debugging time.
* VRRP : Nathan Neulinger, <nneul@umr.edu> updated vrrp dropping
strategy to not reply to incoming bogus adverts. Since this can
introduce flooding loop, bogus adverts are now simply silently
dropped.
* VRRP : Fixed a linkbeat issue while polling NIC flags.
* Updated autoconf and Makefile to support 2.6 kernel IPVS code. For
code readability, created 2 differents libipvs for 2.4 and 2.6 kernel
. Fixed autoconf generated warning.
* Extended ipvswrapper to support shared buffer user rule. This
increase performances by limiting memory allocation. OTOH, created