> -----Original Message----- > From: centos-bounces at centos.org > [mailto:centos-bounces at centos.org] On Behalf Of Jason Pyeron > Sent: Thursday, December 17, 2009 14:37 > To: 'CentOS mailing list' > Subject: [CentOS] NIS failover > > We just updated our configuratiosn to have multiple NIS > servers, when we initiated a test of client failover, we were > disapointed. > > It seemed that the only way to get a filaover was to > /etc/init.d/ypbind restart. > > It behaves as indicated in > http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=508 4845 using > ypbind-1.17.2-13 on Centos 4.5 / Linux xxxxxxxxxxxx > 2.6.9-55.0.12.ELsmp #1 SMP Fri Nov 2 12:38:56 EDT 2007 x86_64 > x86_64 x86_64 GNU/Linux > > http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=4858192 > > > Any advice? So, avoiding the security flamewars... It seems that it behaves slightly different than I indicated before. Snippet of the strace for # ypcat passwd ... mprotect(0x2a9566a000, 4096, PROT_READ) = 0 arch_prctl(ARCH_SET_FS, 0x2a959bde00) = 0 munmap(0x2a9556c000, 33321) = 0 brk(0) = 0x503000 brk(0x524000) = 0x524000 open("/usr/lib/locale/locale-archive", O_RDONLY) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=48528816, ...}) = 0 mmap(NULL, 48528816, PROT_READ, MAP_PRIVATE, 3, 0) = 0x2a959bf000 close(3) = 0 uname({sys="Linux", node="xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx", ...}) = 0 open("/var/yp/nicknames", O_RDONLY) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=185, ...}) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2a98807000 read(3, "passwd\t\tpasswd.byname\ngroup\t\tgro"..., 4096) = 185 read(3, "", 4096) = 0 close(3) = 0 munmap(0x2a98807000, 4096) = 0 open("/var/yp/binding/XXXXXXXXXXXXXXXXXXX.2", O_RDONLY) = 3 pread(3, "\1\0\0\0\300\250\1\"\2\315\0\0", 12, 2) = 12 socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP) = 4 getpid() = 13062 bind(4, {sa_family=AF_INET, sin_port=htons(942), sin_addr=inet_addr("0.0.0.0")}, 16) = 0 ioctl(4, FIONBIO, [1]) = 0 setsockopt(4, SOL_IP, IP_RECVERR, [1], 4) = 0 fcntl(4, F_SETFD, FD_CLOEXEC) = 0 close(3) = 0 close(4) = 0 socket(PF_INET, SOCK_STREAM, IPPROTO_TCP) = 3 bind(3, {sa_family=AF_INET, sin_port=htons(0), sin_addr=inet_addr("0.0.0.0")}, 16) = 0 connect(3, {sa_family=AF_INET, sin_port=htons(111), sin_addr=inet_addr("192.168.1.34")}, 16) = -1 ETIMEDOUT (Connection timed out) close(3) = 0 socket(PF_INET, SOCK_STREAM, IPPROTO_TCP) = 3 bind(3, {sa_family=AF_INET, sin_port=htons(943), sin_addr=inet_addr("0.0.0.0")}, 16) = 0 connect(3, {sa_family=AF_INET, sin_port=htons(111), sin_addr=inet_addr("192.168.1.34")}, 16 <unfinished ...> Then when I ^C it and run again it has failed over, but otherwise it hangs there for more than 300 seconds. -- -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- - - - Jason Pyeron PD Inc. http://www.pdinc.us - - Principal Consultant 10 West 24th Street #100 - - +1 (443) 269-1555 x333 Baltimore, Maryland 21218 - - - -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- This message is copyright PD Inc, subject to license 20080407P00.