Keepalived 2.0.14 已釋出， Keepalived 是一款用 C 編寫的路由軟體。該專案的主要目標是為 Linux 系統和基於 Linux 的基礎裝置提供簡單而強大的負載均衡和高可用性（HA）。
具體更新內容如下：
* Add compiler warning -Wfloat-conversion and fix new warnings.
It was discovered that passing 0.000001 as a parameter specified
as uint32_t to a function did not generate any warning of type
mismatch, or loss of precision.
This commit adds -Wfloat-conversion and fixes 3 instances of new
warnings that were generated.
* For non systemd enviroment, it occurs syntax error 'fi'.
To avoid syntax error, modify keepalived.spec.in.
* When uninstall keepalived with init upstart, stop keepalived process.
* Fix type re LOG_INGO should be LOG_INFO * 6git stash --cached.
The code was actualy in a #ifdef INCLUDE_UNUSED_CODE block, and
so isn't currently compiled.
* Register missing thread function for thread debugging.
* Fix reutrn value of notify_script_compare misusing issue.
* Fix typo in keepalived.conf man page re BFD min_rx.
* Fix segfault when bfd process reloads config.
Issue #1145 reported the bdf process was segfaulting when reloading.
The bfd process was freeing and allocating a new thread_master_t
when reloading, which doesn't work. This commit changes the bfd
process to clean and reinitialise the thread_master_t.
* Fix segfault in handle_proc_ev().
On Linux 3.10 the ack bit can be set in a connector message, and
the CPU number is set to UINT32_MAX. This commit skips acks, and
also checks that CPU number is within range of the number of CPUs
on the system.
* Fix OpenSSL init failure with OpenSSL v1.1.1.
OpenSSL v1.1.1, but not v1.1.0h or v1.1.1b failed in SSL_CTX_new()
if OPENSSL_init_crypto(OPENSSL_INIT_NO_LOAD_CONFIG) had previously
been called.
This commit doesn't call OPENSSL_init_crypto() if doing so causes
SSL_CTX_new() to fail.
* Remove all references to libnfnetlink.
Commit 2899da6 (Stop using linbl for mcast group membership and
setting rx buf sizes) stopped using libnfnetlink, but INSTALL and
keepalived.spec.in were not updated accordingly.
* Fix genhash re OPENSSL_init_crypto bug and improve configure.ac.
Commit fe6d6ac (Fix OpenSSL init failure with OpenSSL v1.1.1) didn't
update the identical code in genhash/ssl.c. Also, an improvement for
the test in configure.ac was suggested.
* Fix log output when real server removed.
FMT_VS() and FMT_RS() both call inet_sockaddrtotrio which uses a
static buffer to return the formatted string, but since FMT_VS(),
wheich simply calls format_vs() copies the returned string to its
own static buffer, if FMT_VS() was called before FMT_RS() then
the returned strings from both could be used.
The problem occurs when both FMT_VS() and FMT_RS() are used as
parameters to log_message() (or printf etc). It appeared to work
fine on x86_64, but was writing the same IP address for both the
real server and virtual server on ARM architectures. This is due
to the compiler evaluating parameters to the log_message() function
call in a different order on the different architectures.
This commit adds inet_sockaddrtotrio_r() which allows the output
to be in a buffer specified by the caller, and so FMT_VS() and
FMT_RS() can now be called in either order without one overwriting
a buffer used by the other.
* Streamline some string formatting with FMT_RS() and FMR_VS().
Following commit 9fe353d (Fix log output when real server removed)
some code can be streamlined now that the order of calling FMT_VS()
and FMT_RS() does not matter.
* Replace FMT_HTTP_RS(), FMT_TCP_RS() and FMT_DNS_RS() with FMT_CHK().
They were all simply defined to be FMT_CHK() so just replace them
with that. This made it much simpler to find all used of FMT_CHK().
* Fix building with gcc 4.4.7 (Centos 6.5).
gcc v4.4.7 doesn't support -Wfloat-conversion, so check for it at
configure time.
* Add dumping checker config/status when receive SIGUSR1.
* Don't put alpha mode checkers into failed state at reload
If a new checker is added at a reload, unless the real server aleady
has failed checkers, then ignore the alpha mode of the checker. This
means that the real server, if up, won't be taken down and then brought
back up again almost straight away. If the real server already has
failed checkers, then setting an alpha mode checker down initially
won't take down the real server, so we can allow the alpha mode setting
to apply.
* Handle alpha mode checkers initial failure at startup better.
* Fix compile failure discovered by Travis-CI.
* Fix calling syslog when not using signalfd().
Pull request #1149 identified that syslog is AS-Unsafe (see signal-safety
man page), and that therefore signals should be blocked when calling it.
This commit blocks signals when calling syslog()/vsyslog() when signalfd()
is not being used.
* Rationalise function attributes.
* Fix enable-optimise configure option.
* Use AS_HELP_STRING for all options in configure.ac.
* Streamline genhash -h option.
* Make genhash -v version match keepalived.
* Fix config check of virtual server quorum against weights of real
servers.
* Fix some configure tested checks for OPENSSL_init_crypto.
* Add infrastructure for adding additional compiler warnings.
* Add standard and extra compiler warnings.
* Add and resolve missing-declarations and missing-prototypes warnings
Approximately 16 additional functions are now declared static.
* Add and resolve old-style-definitions warnings
* Add and resolve redundant-decls warnings
* Add and resolve jump-misses-init warnings
* Add and resolve shadow warnings
* Add and resolve unsuffixed-float-constants warnings
* Add and resolve suggest-attribute=const warnings
* Add and resolve suggest-attribute=format warnings
* Add and resolve suggest-attribute=malloc warnings
* Add and resolve suggest-attribute=noreturn warnings
* Add and resolve suggest-attribute=pure warnings
* Add and resolve unused-macros warnings
* Add and resolve null-dereference warnings
* Add and resolve float-equal warnings
* Add and resolve stack-protector warnings
* Add and resolve strict-overflow=4 warnings
* Add and resolve pointer-arith warnings
This particularly includes adding a number of bytes to a void *.
* Add and resolve cast-qual warnings
* Resolve additional warnings identified on Centos 6.5/gcc 4.4.7
* Remove static from zalloc()
* Fix some compiler warnings on Ubuntu Xenial, and add comments re
others.
* Rename LIST parameters to lst in list_head.h to avoid upper case.
* Fix real server checkers moving from failed to OK on reload.
* add rs judgement in migrate_checkers.
* Detect connection failure in genhash and exit rather than loop.
* Add another function pure attribute.
* Fix sending notifies for vrrp instances at startup when in sync group
Issue #1155 idenfified that notify scripts for vrrp instance transition
to backup state when keepalived started up were not being sent if
the vrrp instance was in a sync group. It was also the case that SNMP
traps, SMTP alerts and FIFO notifies were not being sent either.
This commit make keepalived send the initial notifies when the vrrp
instance is in a sync group.
* Fix building keepalived RPM on Fedora 26.
For some reason -fPIC is needed when testing for the presence of
setns().
* Add vrrp_startup_delay configuration option.
Some systems that start keepalived at boot time need to delay the
startup of the vrrp instances, due to network interfaces taking
time to properly come up. This commit adds a global configuration
option vrrp_startup_delay that delays the vrrp instances starting
up, for the specified number of seconds.
* Handle checkers properly when reload immediately after startup.
* Streamline some of the SMTP checker code.
* Create separate checker for each host in SMTP_CHECK block
Having multiple host entries in an SMTP_CHECK block is deprecated.
This commit streamlines the SMTP_CHECK code by creating a separate
SMTP checker for each host declared in the SMTP_CHECK block, so that
apart from parsing the configuration, the code no longer handles
multiple hosts per checker.
The support for parsing configuration with multiple hosts is only
enabled if WITH_HOST_ENTRIES is defined in check_smtp.c. It is
currently enabled, but when support for multiple hosts in the
SMTP_CHECK block is finally removed, it will simply be a matter of
deleting all code in the WITH_HOST_ENTRIES conditional blocks.
* Make checker fail if ENETUNREACH returned by connect().
The connect() call can return some immediate errors such as ENETUNREACH.
These were not being treated as a failure of the checker, since the code
used to assume that any non success return by connect() meant that the
connection was in progress.
keepalived will now treat ENETUNREACH, EHOSTUNREACH, ECONNREFUSED,
EHOSTDOWN, ENETDOWN, ECONNRESET, ECONNABORTED, ETIMEDOUT, when returned
by connect(), as meaning that the checker has failed.
* Don't set SO_LINGER with a timeout of 0
SO_LINGER with a timeout of 0 causes a TCP connection to be reset
rather than cleanly closed. Instead of specifying a timeout of 0,
use 5 seconds, so that there is an orderly shutdown of the TCP
connection, but the close socket doesn't remain in TIMED_WAIT state
for more than a short time.
* nftables: fix build with kernel lower than 4.1.
* Remove dead code and cosmectics.
Remove code marked as UNUSED where things simply go nowhere even if
define is set. We keep for the moment UNUSED code related to debug
helpers used during coding process.
更新日誌：http://www.keepalived.org/changelog.html