Jason Pyeron wrote: > > > >> -----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. > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos > > How is your /etc/yp.conf defined. NIS failover works flawlessly here if we have /etc/yp.conf like ypserver nis2 ypserver nis But have had problems if we use broadcast. :)